CN108990458B - Method for large-scale disposal and utilization of waste such as coal gangue and treatment of stony desertification - Google Patents
Method for large-scale disposal and utilization of waste such as coal gangue and treatment of stony desertification Download PDFInfo
- Publication number
- CN108990458B CN108990458B CN201810734578.8A CN201810734578A CN108990458B CN 108990458 B CN108990458 B CN 108990458B CN 201810734578 A CN201810734578 A CN 201810734578A CN 108990458 B CN108990458 B CN 108990458B
- Authority
- CN
- China
- Prior art keywords
- soil
- gangue
- coal gangue
- layer
- coal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
- A01B79/02—Methods for working soil combined with other agricultural processing, e.g. fertilising, planting
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Cultivation Of Plants (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method for treating and utilizing wastes such as coal gangue and the like on a large scale and treating stony desertification, and relates to the technical field of large-scale treatment and utilization of coal-based solid wastes, stony desertification treatment methods and ecological restoration. The invention combines the large-scale disposal of coal-based solid wastes with the stony desertification treatment, and utilizes coal gangue, fly ash, desulfurized gypsum and other coal-based solid wastes and/or the original crushed stones and rocks in the locality to manufacture artificial graded mixed soil and cover the stony desertification ground surface, thereby achieving the purposes of disposing the solid wastes in a large scale and realizing the stony desertification treatment. The invention makes the best use of the original state and natural conditions of the material; the coal-based solid waste can be eliminated in a large scale, the problem of large-scale stacking of the coal gangue and the fly ash is thoroughly solved, and the potential safety and environmental pollution hazards are eliminated; the thorough ecological management of the stony desertification area is realized; can be combined with other organic wastes for utilization, thereby further driving the treatment of other wastes; can form ecological cycle economy in one area.
Description
Technical Field
The invention relates to the technical field of large-scale disposal and utilization of coal-based solid wastes and stony desertification control methods and ecological restoration, in particular to a method for large-scale disposal and utilization of wastes such as coal gangue and the like and stony desertification control.
Background
Coal gangue is a typical solid waste discharged in the coal mining and selecting process. China is a large coal producing country, huge amounts of coal gangue discharged from various places every year are piled up to form mountains and are difficult to digest, billions of tons of accumulated piled coal gangue are accumulated at present, the scale is huge, and the piling discharge amount is still increased at a remarkable speed. The stockpiling of the coal gangue not only occupies a large amount of land, is easy to form artificial disasters such as dust raising, water and soil loss, debris flow, landslide and disintegration, but also seriously pollutes the environment and causes serious influence on the life and health of people. At present, the actual disposal utilization rate of coal gangue in China is low, and large-scale disposal is urgently needed. The fly ash and the desulfurized gypsum are mainly fine solid wastes discharged by coal-fired power plants and also belong to coal-based solid wastes, the annual discharge amount is huge, and long-term stacking not only occupies space, but also seriously pollutes the environment. No matter the coal gangue, the fly ash or the desulfurized gypsum, dozens or even hundreds of methods for disposal and utilization exist at present, and the comprehensive disposal and utilization of the coal gangue, the fly ash or the desulfurized gypsum are greatly promoted by the nation, wherein the methods comprise the steps of preparing the coal gangue into soil fertilizers, soilless culture substrates, treating saline-alkali soil, applying to roads, manufacturing rock wool, extracting valuable metals, utilizing the valuable metals and the like. However, due to various reasons such as cost and source-sink compatibility, no single or comprehensive disposal and utilization technology is adopted, and large-scale disposal of coal-based solid wastes such as coal gangue, fly ash and desulfurized gypsum is really realized in China or local regions. Low cost, large scale disposal techniques, approaches or application scenarios become a bottleneck problem to address these solid waste remediation.
The stony desertification is the desertification of the rocky earth surface, which is the scene of desertification due to the loss of earth surface soil and the bare leakage of rocks caused by various factors, particularly human factors, and is not beneficial to even difficult to be suitable for the growth of plants. The harm of the earth surface stony desertification, particularly the serious stony desertification, is very serious, firstly, the land resource is lost, so that the water source is difficult to maintain, the agricultural production condition and the ecological environment are further deteriorated, and a vicious circle is formed. Geological disasters such as torrential floods, landslides, debris flows and the like are easy to occur in the stony desertification area. These problems or their superposition may further contribute to social problems such as population, survival, energy and poverty. Furthermore, stony desertification is also highly correlated with local people poverty. Stony desertification is widely distributed in China, is particularly frequently distributed in karst regions, for example, more than 400 counties in the south and southwest regions of China are distributed, and relates to provinces including Guangdong, Guangxi, Guizhou, Yunnan and the like. At present, China highly attaches importance to the control of stony desertification and provides a control idea for comprehensively controlling stony desertification in multiple modes and multiple pipes. Although positive treatment effects are obtained at present, on one hand, many existing treatments are relatively preliminary and difficult to consolidate or radically cure; on the other hand, many areas still have large amounts of stony deserted surfaces, especially heavy stony deserted surfaces, which are difficult to effectively treat. Therefore, the large-scale control of stony desertification is still an urgent need in many areas of China. The root of stony desertification is in soil, and radical treatment measures are also in soil. For the slight stony desertification earth surface with soil, the core of prevention and control is to prevent water and soil loss. For the severe stony desertification ground surface, if the local redundant soil can be utilized, the soil can be taken to cover the stony desertification ground surface, and then the problem of soil and water conservation of the soil covering is solved. However, for many mountainous areas in the southwest of China, soil shortage is the greatest current situation, and no surplus soil is available. The essence of stony desertification in these areas is lack of soil. For the treatment of the severe stony desertification ground surfaces, large-scale low-cost soil making technical schemes and application examples are not seen at present.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art and provide a method for treating and utilizing waste such as coal gangue and the like on a large scale and treating stony desertification, in particular to a method for realizing the fundamental treatment of stony desertification and realizing the large-scale even thorough treatment and utilization of the waste such as the coal gangue and the like when local or nearby soil is scarce but large-scale coal-based solid waste such as the coal gangue, fly ash, desulfurized gypsum and the like exists in stony desertification areas with serious surface soil loss and large scope.
The purpose of the invention is realized as follows:
the large-scale disposal of the coal-based solid wastes is combined with the stony desertification treatment, and the coal-based solid wastes such as coal gangue, fly ash and desulfurized gypsum and/or the original crushed stones and rocks in the locality are ground to manufacture artificial soil and cover the artificial soil on the stony desertification ground surface, so that the aims of disposing the solid wastes in a large scale and realizing the stony desertification treatment are fulfilled. In order to reduce the cost as much as possible, the working links should be reduced as much as possible in technical measures, and the processing and transformation of wastes are reduced as much as possible.
Specifically, the technical scheme of the method comprises the following steps:
determining a candidate treatment site: evaluating the use of the stony desertification earth surface to be treated, and putting requirements on the texture (grain size composition) of soil and the quantity and form of covering soil layers;
secondly, gangue sorting: sorting the stacked coal gangue according to the particle size, and separating the fine particle group, the medium particle group and the coarse particle group of the coal gangue
Separating the granule group (including rock block or broken stone) from the water, and preparing for soil building; the division of the grain groups can be determined according to actual needs or experience accumulation, and one or more groups can be used;
crushing waste rocks: when the proportion of fine grain groups or medium grain groups in the existing coal gangue or the absolute quantity of the existing coal gangue is less than the soil-making proportion requirement or the dosage requirement, crushing the coarse grain group coal gangue into fine grain groups or medium grain groups;
the two steps aim at the existing gangue pile, so that the requirements on crushing and sorting of the gangue can be increased in the production link of a coal washing plant for processing the gangue newly generated in the future, and the gangue in a fine grain group, a medium grain group and a coarse grain group can be directly formed according to the requirements at lower cost;
pretreatment of the granules: according to the analysis result of the assay, preprocessing harmful substances such as heavy metals in the gangue, the fly ash and the desulfurized gypsum granules;
fifthly, preparing artificial graded mixed soil through mixing; the mixed soil obtained through the steps is called as 'raw soil'; comprehensively considering the target application of the artificial graded soil, determining the texture of the artificial graded soil, namely determining the material composition and the particle size composition of the gangue, the fly ash, the desulfurized gypsum and the organic garbage, and then preparing the artificial graded mixed soil through mixing;
in order to ensure uniform mixing and improve efficiency, a special mixing device is required; in the initial mixing stage, the material components need to be kept in a dry state, namely, dry mixing is carried out firstly; after uniformly mixing, properly spraying water mist for humidification to prevent dust, wherein the humidification quantity is based on the principle that the mixed material does not form hardening;
the particle size of the waste rock soil is larger, the waste rock soil is used as a coarse skeleton of raw soil to ensure porosity, and the fly ash and the desulfurized gypsum are fine-grained soil and are mixed together to form good gradation; the content of the coarse grain size can be increased in the initial stage in consideration of the subsequent natural disintegration of the coal gangue; in addition, in the link, soil fertilizers can also be mixed in a proper proportion to play a role in fertilizing the raw soil.
Sixthly, pretreating the stony desertification earth surface: firstly, determining a candidate treatment site, and then performing 'leakage detection and filling up' and pretreatment on the site to remove a ground water leakage channel or perform plugging and anti-seepage treatment on the channel; in order to prevent the soil from sliding, a soil blocking facility can be arranged; in order to prevent the soil from losing due to excessive water in rainy season, a drainage facility can be arranged;
covering with raw soil: covering the earth surface of the stony desertification field with raw soil; in order to prevent wind from blowing dust, covering the soil surface with gauze or film and covering with stone to prevent wind from blowing;
eighthly, water application: carrying out artificial or natural rainfall watering on the covering soil;
the earth surface covering layer obtained through the steps has less nutrients and weaker fertility, and can play a role in storing water and preserving water;
ninthly, curing: naturally placing the covered soil layer to ensure that the moisture and the soil structure fully permeate, act and deform to form a soil layer with a stable structure;
r fertilization: further cultivation utilization is carried out on the basis of artificial soil curing, and surface soil improvement is needed, including surface cultivation soil layer cultivation, loosening and fertilization.
The invention has the following advantages and positive effects:
the invention utilizes the original state and natural condition of the material as much as possible, has less manual modification links and low cost;
secondly, the coal-based solid waste can be eliminated in a large scale, the problem of large-scale stacking of coal gangue is thoroughly solved, and potential safety and environmental pollution hazards are eliminated;
realizing thorough ecological management of the stony desertification area, recovering green mountains in green lands, further realizing reclamation and agricultural planting, increasing economic benefits and even playing a role in poverty removal and enrichment;
fourthly, the organic waste can be combined with other organic wastes for utilization, thereby further driving the treatment of other wastes;
the ecological cycle economy can be formed in one area.
Drawings
FIG. 1 is a partial earth covering structure of a stony desertification earth surface;
FIG. 2 is an artificial graded mixed soil material and its structure;
FIG. 3 is a cross-section of an example of the results of a wide range of earth covering of stony desertification;
in the figure:
1, the ground;
2-coarse gradation layer [ coarse coal gangue + fly ash ];
3-medium gradation layer [ medium-grain coal gangue + (fly ash + desulfurized gypsum) ];
4-fine gradation layer [ fine coal gangue + (fly ash + desulfurized gypsum) ];
5-desulfurized gypsum;
6-fine coal gangue;
7-medium-grain coal gangue;
8-coarse (containing lump) coal gangue;
9-original stone block;
10-fly ash;
11-other rock or organic waste ground to form granules;
12-the original earth surface;
13-coarse grading soil layer;
14-medium-grade soil distribution layer;
15-fine grading soil layer;
16-original huge stone blocks on the ground;
17-a soil retaining facility;
18-a drain hole;
19-intercepting the catchment ditch.
Detailed Description
The following detailed description is made with reference to the accompanying drawings and examples:
firstly, environmental characteristics:
a certain area is a coal base, a large amount of coal gangue is stockpiled for a long time and needs to be treated urgently, and meanwhile, a plurality of power plants in the area produce fly ash and desulfurized gypsum; through inspection, the local coal gangue, the fly ash and the desulfurized gypsum do not contain harmful substances such as heavy metal and the like; meanwhile, the land exists in a severe stony desertification area and is a mountain land terrain, a large amount of exposed stones exist on the surface of the land, and stony desertification control and agricultural production are urgently needed to be carried out, so that the technology is tried.
Secondly, the method is used by combining the environmental characteristics of the land as follows:
1. the implementation step (i)
Evaluating the use of the stony desertification earth surface, and determining a candidate treatment site; the governing party hopes that the water storage function can be realized after the surface is positioned, and the surface soil can be planted with ecological grass so as to play a role of ecological slope protection; after evaluation and design, determining that the covering layer adopts three graded soil layers, and designing as shown in figure 1, wherein the three graded soil layers are from top to bottom:
the floor 1, a coarse grading layer [ coarse coal gangue + fly ash ]2, a middle grading layer [ medium coal gangue + (fly ash + desulfurized gypsum) ]3, and a fine grading layer [ fine coal gangue + (fly ash + desulfurized gypsum) ] 4;
the average grain diameter of the graded soil layer is increased progressively, and the grain diameter of the surface layer is matched with the grain diameter of the materials according to the soil property.
2. Aiming at the selected waste rock storage yard, the implementation step II
According to the actual situation of the particle size distribution of the gangue in the field observation period and considering the future agricultural planting application of the candidate field, the gangue is screened into three groups, namely a fine particle group (with the diameter of less than 2 mm), a medium particle group (with the range of 2mm <5 mm), and the rest with the diameter of more than 5mm are coarse particle groups (including lump stones or broken stones); the gangue is mostly in a weathered and broken state after being stacked for a long time, so the gangue breaking in the third step is not carried out; meanwhile, the step of parallel development is carried out, water leakage channels such as cracks and the like on the ground are not found through field survey, and field ground leakage stoppage treatment is not required.
3. Carrying out chemical analysis on local fly ash, coal gangue and desulfurized gypsum, finding no harmful substances such as heavy metals and the like, and carrying out no pretreatment, wherein the fifth step is implemented, artificial graded mixed soil is prepared by mixing and stirring, and fig. 2 is a schematic structural diagram of the artificial graded mixed soil material;
the method comprises the following steps: desulfurized gypsum 5, fine coal gangue 6, medium coal gangue 7, coarse (blocky) coal gangue, original rock block 9, fly ash 10 and other rocks or organic wastes are ground into granules 11;
the 1 st soil layer is not pre-mixed in the sorting site, but the coarse-grained coal gangue sorted out in the step two is directly transported to the target ground surface to be directly piled and paved, and 20 percent of fly ash is sprayed;
and (2) directly mixing the soil layer on a separation crushing site, wherein the soil layer is prepared from the following raw materials in a coarse and medium particle group: fine particle group: fly ash = 5: 2: 3, dry mixing and preparing in a mass ratio;
the 3 rd soil layer is a surface soil layer, the layer is used for grass planting and slope protection, the particle size ratio is determined according to the texture of loam, the gangue fine particle group is used as a main material, the mass ratio is 50%, the fly ash is used as a fine particle group, the mass ratio is 30%, the desulfurized gypsum is used as an auxiliary material, the mass ratio is 20%, in addition, the mass ratio of the organic garbage is 10%, and a special mixing device is arranged to fully mix the organic garbage in a dry state.
4. Seventhly, fig. 3 is a section of an example of a large-range earth covering result on the earth surface, a soil retaining facility 17 is arranged at the position of an earth covering slope toe due to the fact that the earth surface has a large slope and the earth covering thickness is high, an original stone wall 16 is used as a middle soil retaining facility due to the fact that the slope is long, a drain hole 18 is formed in the bottom of the slope toe (including the bottom of the soil retaining facility) in order to prevent soil flowing and soil layer sliding caused by heavy rainfall, and excess water is guided to converge into a catch basin to be drained away.
5. And (6) carrying out the step (b), and applying water by adopting natural rainfall because of abundant local rainfall.
6. Step ninthly is carried out, but the method is handed to the user for carrying out and using the step enrichment in the process.
Claims (1)
1. A method for treating and utilizing waste such as coal gangue and the like on a large scale and treating stony desertification is characterized by comprising the following steps:
determining a candidate treatment site: evaluating the use of the stony desertification earth surface to be treated, and providing requirements for the soil texture formed by the grain diameter and the quantity and the form of the covering soil layer;
secondly, gangue sorting: sorting the stacked coal gangue according to particle size, separating a fine gangue particle group, a medium gangue particle group and a coarse gangue particle group comprising lump stones or broken stones from the coal gangue particle group, and preparing the coal gangue particle group and the medium gangue particle group for soil making; the division of the grain groups is determined according to actual needs or experience accumulation, and one or more groups of the grain groups are used;
crushing waste rocks: when the proportion of fine grain groups or medium grain groups in the existing coal gangue or the absolute quantity of the existing coal gangue is less than the soil-making proportion requirement or the dosage requirement, crushing the coarse grain group coal gangue into fine grain groups or medium grain groups;
the two steps aim at the existing gangue pile, and increase the requirements on crushing and sorting of the gangue in the production link of a coal washing plant for processing the gangue newly generated in the future, so that the gangue in a fine grain group, a medium grain group and a coarse grain group can be directly formed at lower cost according to the requirements;
pretreatment of the granules: according to the analysis result of the assay, preprocessing harmful substances such as heavy metals in the gangue, the fly ash and the desulfurized gypsum granules;
fifthly, preparing artificial graded mixed soil through mixing; the mixed soil obtained through the steps is called raw soil; comprehensively considering the target application of the artificial graded soil, determining the texture of the artificial graded soil, namely determining the material composition and the particle size composition of the gangue, the fly ash, the desulfurized gypsum and the organic garbage, and then preparing the artificial graded mixed soil through mixing;
in order to ensure uniform mixing and improve efficiency, a special mixing device is required; in the initial mixing stage, the material components need to be kept in a dry state, namely, dry mixing is carried out firstly; after uniformly mixing, properly spraying water mist for humidification to prevent dust, wherein the humidification quantity is based on the principle that the mixed material does not form hardening;
the particle size of the waste rock soil is larger, the waste rock soil is used as a coarse skeleton of raw soil to ensure porosity, and the fly ash and the desulfurized gypsum are fine-grained soil and are mixed together to form good gradation; in consideration of subsequent natural disintegration of the coal gangue, the content of the coarse grain size is increased at the initial stage; in addition, in the link, soil fertilizer is mixed according to a proper proportion, so that the function of fertilizing and producing soil is achieved;
sixthly, pretreating the stony desertification earth surface: firstly, determining a candidate treatment site, then performing leakage detection, filling and pretreatment on the site, and removing a ground water leakage channel, or performing plugging and anti-seepage treatment on the channel; in order to prevent the soil from sliding, a soil blocking facility is arranged; in order to prevent the soil from losing due to excessive water in rainy season, a drainage facility is arranged;
covering with raw soil: covering the earth surface of the stony desertification field with raw soil; in order to prevent wind from blowing dust, covering the soil surface with gauze or film and covering with stone to prevent wind from blowing;
eighthly, water application: carrying out artificial or natural rainfall watering on the covering soil;
the surface covering layer obtained through the steps has less nutrients and weaker fertility, but has the functions of storing water and preserving water;
ninthly, curing: naturally placing the covered soil layer to ensure that the moisture and the soil structure fully permeate, act and deform to form a soil layer with a stable structure;
r fertilization: further carrying out cultivation utilization on the basis of artificial soil curing, and improving surface soil, including ploughing, loosening and fertilizing the surface cultivation soil layer;
the method is used by combining the environmental characteristics of the land as follows:
A. the implementation step (i)
Evaluating the use of the stony desertification earth surface, and determining a candidate treatment site; the governing party hopes that the water storage function can be realized after the surface is positioned, and ecological grass is planted in the surface soil so as to play a role of ecological slope protection; after evaluation and design, determining that the covering layer adopts three graded soil layers from top to bottom:
the coal gangue powder concrete comprises a ground (1), a coarse-graded layer, a medium-graded layer and a fine-graded layer, wherein the coarse-graded layer is composed of coarse-grained coal gangue and fly ash (2), the medium-graded layer is composed of medium-grained coal gangue, fly ash and desulfurized gypsum (3), and the fine-graded layer is composed of fine-grained coal gangue, fly ash and desulfurized gypsum (4);
the average particle size of the graded soil layer is increased progressively, and the particle size of the surface layer is matched with the particle size of the materials according to the soil property;
B. aiming at the selected waste rock storage yard, the implementation step II
According to the actual situation of the particle size distribution of the waste rocks in the field observation period and considering the future agricultural planting application of the candidate field, the waste rocks are screened into three groups, namely a fine particle group, which is determined to be 2mm in diameter and a medium particle group, the range is determined to be 2mm <5mm in diameter, and the rest particles with the diameter >5mm are coarse particle groups and comprise blocks or broken stones; the gangue is mostly in a weathered and broken state after being stacked for a long time, so the gangue breaking in the third step is not carried out; meanwhile, the step sixthly is carried out in parallel, water leakage channels such as cracks and the like on the ground are not found through field survey, and field ground leakage stoppage treatment is not needed;
C. carrying out chemical analysis on local fly ash, coal gangue and desulfurized gypsum, finding no harmful substances such as heavy metals and the like, and carrying out no pretreatment;
the method comprises the following steps: desulfurized gypsum (5), fine coal gangue (6), medium coal gangue (7), coarse coal gangue, original rock block (9), fly ash (10) and other rocks or organic wastes are ground into granules (11);
the 1 st soil layer is not pre-mixed in the sorting site, but the coarse-grained coal gangue sorted out in the step two is directly transported to the target ground surface to be directly piled and paved, and 20 percent of fly ash is sprayed;
and (2) directly mixing the soil layer on a separation crushing site, wherein the soil layer is prepared from the following raw materials in a coarse and medium particle group: fine particle group: fly ash = 5: 2: 3, dry mixing and preparing in a mass ratio;
the third soil layer is a surface soil layer, the surface soil layer is used for grass planting and slope protection, the particle size ratio is determined according to the texture of loam, the gangue fine particle group is used as a main material, the mass ratio is 50%, the fly ash is used as a fine particle group, the mass ratio is 30%, the desulfurized gypsum is used as an auxiliary material, the mass ratio is 20%, in addition, the mass ratio of the organic garbage is 10%, and a special mixing device is arranged to fully mix the organic garbage in a dry state;
D. and seventhly, arranging a soil retaining facility (17) at the position of the soil covering slope toe due to the fact that the slope of the ground surface is larger and the soil covering thickness is higher, using the original stone wall (16) as a middle soil retaining facility due to the fact that the slope is longer, arranging a drain hole (18) at the bottom of the slope toe in order to prevent soil flowing and soil layer sliding caused by heavy rainfall, and collecting excess water into the intercepting ditch to drain away.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810734578.8A CN108990458B (en) | 2018-07-06 | 2018-07-06 | Method for large-scale disposal and utilization of waste such as coal gangue and treatment of stony desertification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810734578.8A CN108990458B (en) | 2018-07-06 | 2018-07-06 | Method for large-scale disposal and utilization of waste such as coal gangue and treatment of stony desertification |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108990458A CN108990458A (en) | 2018-12-14 |
| CN108990458B true CN108990458B (en) | 2021-08-03 |
Family
ID=64599256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810734578.8A Active CN108990458B (en) | 2018-07-06 | 2018-07-06 | Method for large-scale disposal and utilization of waste such as coal gangue and treatment of stony desertification |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108990458B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111386955A (en) * | 2020-04-27 | 2020-07-10 | 宁夏大学 | Water-retention salt-suppression yield-increase method for northern arid area land |
| CN114190130A (en) * | 2021-12-15 | 2022-03-18 | 中国科学院武汉岩土力学研究所 | Artificial soil for treating saline-alkali soil and use method thereof |
| CN116195399A (en) * | 2023-03-06 | 2023-06-02 | 成都环美园林生态股份有限公司 | Method for treating stony desertification of land |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002935A (en) * | 2010-12-16 | 2011-04-06 | 西安科技大学 | Method for utilizing mine coal gangues to control and fix sands |
| CN104429216A (en) * | 2014-12-17 | 2015-03-25 | 安徽理工大学 | Filling and reclamation technology for coal gangues without being covered by surface soil |
| RU2636945C1 (en) * | 2017-04-20 | 2017-11-29 | федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский горный университет" | Method for biological soils reclamation |
| CN107466512A (en) * | 2017-07-27 | 2017-12-15 | 内蒙古正唐环保产业有限公司 | Using the structure and method in solid waste comprehensive regulation salt-soda soil |
-
2018
- 2018-07-06 CN CN201810734578.8A patent/CN108990458B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002935A (en) * | 2010-12-16 | 2011-04-06 | 西安科技大学 | Method for utilizing mine coal gangues to control and fix sands |
| CN104429216A (en) * | 2014-12-17 | 2015-03-25 | 安徽理工大学 | Filling and reclamation technology for coal gangues without being covered by surface soil |
| RU2636945C1 (en) * | 2017-04-20 | 2017-11-29 | федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский горный университет" | Method for biological soils reclamation |
| CN107466512A (en) * | 2017-07-27 | 2017-12-15 | 内蒙古正唐环保产业有限公司 | Using the structure and method in solid waste comprehensive regulation salt-soda soil |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108990458A (en) | 2018-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110454165B (en) | Repair matrix for abandoned mine pits of limestone quarry and preparation method and landfill method thereof | |
| CN104641755B (en) | The land remediation method of discarded Exploit sand and stone field | |
| CN105839649A (en) | Ecological restoration method for metal mine waste storage yard | |
| CN108990458B (en) | Method for large-scale disposal and utilization of waste such as coal gangue and treatment of stony desertification | |
| CN103461084B (en) | Afforesting matrix for improving stone-pit waste muck and preparation method and application of afforesting matrix | |
| CN113243279A (en) | Coal gangue hill matrix improvement method | |
| CN109601046B (en) | Humic acid repairing and greening method for slag mountain | |
| CN101683033A (en) | Method for quickly desalting dredgerfill by using desulfurization gypsum (DSG) | |
| Danilov et al. | Effective methods for reclamation of area sources of dust emission | |
| CN104429216A (en) | Filling and reclamation technology for coal gangues without being covered by surface soil | |
| CN111727797A (en) | Ecological restoration method for sand iron mine land of arid desert region | |
| CN111875450A (en) | Soil repairing agent and repairing method for backfill area of coal mining pit | |
| CN113875344A (en) | Ecological restoration method for coal mine mountain geological environment | |
| CN113396795B (en) | Foreign soil and soil layer structure based on river and lake bottom mud and phosphorite solid waste and preparation method | |
| CN201873998U (en) | Composite isolation layer structure for ecological restoration of side slope of acid waste rock field | |
| CN104148377A (en) | Method for producing greened structure soil from silt | |
| CN112534984B (en) | Method for improving soft clay into planting soil | |
| CN111069261B (en) | Process flow for industrially preparing soil through water filtration and purification | |
| CN218925661U (en) | Ecological restoration structure for extremely-acidified mine abandoned land | |
| CN111788976A (en) | Ecological restoration method for resource iron ore waste land | |
| Ye | Research progress on vegetation ecological restoration of abandoned land in coal mine area | |
| CN109673279A (en) | A kind of vegetation cropping pattern controlling the soil erosion of coal gangue hill reclaimed land | |
| Li | Review of coal gangue characteristics and ecological restoration management technology | |
| CN212551013U (en) | Economical red mud yard in-situ greening restoration layered system | |
| CN114438992A (en) | Method for restoring and treating geological environment of abandoned mine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |