CN101074605B

CN101074605B - Roof pretightening telescopic beam of emergent thin coal-bed lane and its supporting method

Info

Publication number: CN101074605B
Application number: CN2007100159287A
Authority: CN
Inventors: 谭云亮; 刘传孝; 赵同彬
Original assignee: Shandong University of Science and Technology
Current assignee: Shandong University of Science and Technology
Priority date: 2007-06-11
Filing date: 2007-06-11
Publication date: 2011-06-22
Anticipated expiration: 2027-06-11
Also published as: CN101074605A

Abstract

The invention discloses a preloaded extension girder and the supporting method for the slant thin coal bed top board. The extension girder includes two steel tubes covered with each other and at least one end is closed, a spring. The steel tube with big diameter is mother column and the smaller is active column. The spring is between the active and mother columns. The column ears are sealed on the active column bare column and the mother column body. When supporting, it needs to determine the position and the angle, a small pit is dig at the coal bed bottom to block the girder two ends by adjusting the extension girder, then to fix the extension girder and lay the wooden strip, the wattle on the extension girder. The invention has the simple operation and decreased the working strength. Because of the locking action of the spring, the supporting strength can be increased by the addition of the deformation of two sides to control the wall rock deformation initiatively.

Description

Roof pretightening telescopic beam of emergent thin coal-bed lane and supporting method

Technical field

The application belongs to the coal mining technical field, especially the supporting of steeply inclined thin seam tunnel roof.

Background technology

Under coal mine in the thin seam mining process, when running into half-edge coal seam, owing to influenced by structure, tectonic stress is bigger, and the coal seam scope of being damaged is big, and vertical coal seam roof and floor pressure is less, and the coal seam is looser.During digging laneway, bigger in half-edge coal seam from back (coal seam) pressure, be difficult to supporting.The principal mode of half-edge coal seam roadway support at present has: mine timber supporting, trapezoidal metallic support supporting, bolt support etc., and the shortcoming of these supportings shows: support material consumption is big, the support cost height, labor strength is big, and supporting effect is undesirable.

Summary of the invention

The application is the deficiency that overcomes above-mentioned steeply inclined thin seam laneway support method, and a kind of roof pretightening telescopic beam of emergent thin coal-bed lane and supporting method thereof are provided.

For achieving the above object, the application's supporting extensible canopy comprises two steel pipes and spring of being nested together of at least one end sealing, wherein the steel pipe that diameter is big is called female post, the little person of diameter is called post alive, between spring places at the bottom of post alive and the female post post, difference welded post ear on the cylinder that the post of living exposes and on female post cylinder.

The supporting method of above-mentioned extensible canopy in the steeply inclined thin seam tunnel is:

1, every interval 0.8-1.2 rice digs a pitting on the roof in steeply inclined thin seam tunnel and the corresponding rib of base plate, and the pitting diameter is advisable to inject extensible canopy, and the pitting degree of depth is advisable can hold extensible canopy.

2, prop raising tool is stuck on the post ear of post alive and female post, operation prop raising tool retraction makes post alive overcome spring pressure female post of withdrawing, two pittings on the extensible canopy aligning roof and floor, the operation prop raising tool stretches out, and the extensible canopy two ends are withstood in the pitting again, unload prop raising tool, by the spring pressure roof supporting;

3, on extensible canopy, lay batten and chaste tree basketry, finish supporting.

The application has replaced original mine timber support form, and is not only simple to operate, alleviated labor strength; And because the pretension effect of spring body, along with the increase of being out of shape is helped in tunnel two, its supporting intensity increases, play the effect of ACTIVE CONTROL surrouding rock deformation, improved supporting effect greatly, for enterprise security production provides guarantee, and recyclable repeated use, support cost is low.

Description of drawings

Fig. 1 is the structural representation of the application's extensible canopy;

Fig. 2 is the application's extensible canopy supporting sectional schematic diagram.

Among the figure: the female post of 1-, 2-spring, 3-post ear, 4-post alive, 5-post ear, 6-top board, 7-top board pitting, 8-batten hedge, 9-base plate pitting, 10-tunnel, 11-base plate, 12-prop raising tool.

The specific embodiment

As shown in Figure 1, the application's supporting extensible canopy comprises two steel pipes that are nested together and the spring 2 (thickness is 5mm) of at least one end sealing, wherein the steel pipe that diameter is big is called female post 1, the little person of diameter is called post 4 alive, between spring 2 places at the bottom of post 4 alive and female post 1 post, be welded with

post ear

5 and 3 respectively on the cylinder that the post 4 of living exposes with on female post 1 cylinder.

Above-mentioned steel pipe thickness is 5mm, female column length 700mm, external diameter 110mm, internal diameter 100mm; Column length 500--1000mm alive, external diameter 100mm; Spring is long naturally to be 300mm, and maximum can the amount of contracting be 100mm, and diameter is more smaller than the internal diameter of female post; Require the female post and the post repetition segment length 400mm that lives under the nature.Because the maximum of spring can the amount of contracting be 100mm; Under the fixing situation of female column length, can obtain the scope of application of extensible canopy supporting by regulating column length alive.

1, every interval 0.8-1.2 rice digs a pitting 7 and 9 on the roof 6 in steeply inclined thin seam tunnel 10 and base plate 11 corresponding ribs, and the pitting diameter is advisable to inject extensible canopy, and the pitting degree of depth is advisable can hold extensible canopy.

2, prop raising tool 12 is stuck on the

post ear

5 and 3 of post 4 alive and female post 1, operation prop raising tool 12 retractions, make post 4 alive overcome spring 2 pressure female post 1 of withdrawing, again extensible canopy is aimed at two pittings 7 and 9 on top, the base plate 12 and 11, operation prop raising tool 12 stretches out, the extensible canopy two ends are withstood in the pitting, unload prop raising tool 12, by spring 2 pressure support top boards 6;

3, on extensible canopy, lay batten chaste tree basketry 8, finish supporting.

Claims

1. roof pretightening telescopic beam of emergent thin coal-bed lane, it is characterized in that, it comprises steel pipe and a spring of the sealing of two foundation ends, two steel pipe sockets together, and its bottom is positioned at the same side, wherein the steel pipe that diameter is big is called female post, the little person of diameter is called post alive, spring one end places at the bottom of the post post alive, and the other end places at the bottom of female post post, is being welded with the post ear respectively on the cylinder that the post of living exposes with on female post cylinder.

2. roof pretightening telescopic beam of emergent thin coal-bed lane supporting method as claimed in claim 1 is characterized in that it may further comprise the steps:

(1) every interval 0.8-1.2 rice digs a pitting on the roof in steeply inclined thin seam tunnel and the corresponding rib of base plate, and the pitting diameter is advisable to inject extensible canopy, and the pitting degree of depth is advisable can hold extensible canopy;

(2) prop raising tool is stuck on the post ear of post alive and female post, operation prop raising tool retraction makes post alive overcome spring pressure female post of withdrawing, two pittings on the extensible canopy aligning roof and floor, the operation prop raising tool stretches out, and the extensible canopy two ends are withstood in the pitting again, unload prop raising tool, by the spring pressure roof supporting;

(3) on extensible canopy, lay batten and chaste tree basketry, finish supporting.