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Waste rock bag roadside support method for anchoring low coal seam with strong roof

A technology of hard roof and roadside support, which is used in earth-moving drilling, filling, safety devices, etc., can solve the problems of high cost of filling materials such as concrete, local stress concentration of filling body, and complicated construction process, so as to improve the initial support. The effect of protecting strength, reducing gaps, enhancing integrity and stability

Inactive Publication Date: 2016-03-23
SHANDONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the roadside support adopts mechanized integral pouring of high-strength concrete as the filling body. However, in the gob-side entry retention, if concrete and other relatively dense filling materials with low deformation capacity are used as the roadside support, it is easy to cause local stress concentration of the filling body. , are more likely to be damaged, and the cost of filling materials such as concrete is high, there are many supporting equipment, the construction process is complicated, and the dust generated is large, so the use should be limited

Method used

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  • Waste rock bag roadside support method for anchoring low coal seam with strong roof

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Experimental program
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Embodiment 1

[0037] As the working face advances, the top-cut log pillars 6 are arranged along the empty side of the filling body next to the lane, the pillar diameter is not less than 150mm, the height is not less than 1200mm, and the spacing is 1.0m. The pillar and the roof are connected by wooden wedges, and the top-cut pillar No withdrawal for permanent support;

[0038] Then build and fill the bag, clean the bottom of the roadway to the hard bottom before building, and then lay the plastic double-resistance net 2 on the bottom of the roadway, roll the remaining part, and tie the gangue with a woven bag for the construction work. The gaps between are filled with clay bags to reduce air leakage in the mined-out area. The side of the filling body after lining the filling body is vertical to the top and bottom plate into a plane, the filling step is 2.0m, the filling width is 2.5m, and the width of the left lane is the same as the original roadway width Similarly, when the height of the base...

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Abstract

The invention discloses a waste rock bag roadside support method for anchoring low coal with seam strong roof. The waste rock bag roadside support method comprises a top cut round log supporting column part and an 'obturator + top contracted squared timber' part, wherein the top cut round log supporting column is arranged on the goaf side of a roadside packing body; the roadside packing body consists of waste rock bag bodies, fine particle bag bodies and plastic double resisting nets, the squared timber is adopted for top contract after the obturator is built; the obturator after being compacted is reinforced by an 'anchor rod + reinforcing steel ladder' support; the reinforcing steel ladder and a roadway top plate reinforcing steel ladder are in a bridging connection. According to the waste rock bag roadside support method disclosed by the invention, the round log is adopted as a top cut supporting column, and the waste rock bag bodies, the clay bag bodies and the plastic double resisting nets are selected to build the roadside packing bodies; the squared timber is adopted for top contracting; the 'anchor rod + reinforcing steel ladder' support is utilized for reinforcing the obturator; the waste rock bag roadside support method disclosed by the invention is well adapted to the roof strata movement, and the stability of the obturator and a roadway is improved.

Description

Technical field [0001] The invention relates to a method for supporting the side of a roadway in a thin coal seam along the gob, in particular to a method for supporting the side of a roadway by anchoring gangue bags in a thin coal seam with hard roof. Background technique [0002] As a green mining technology, roadway retention along the goaf has been widely used in our country. It can rationally mine coal resources, ease the tension in mining and extend the service life of the mine, and therefore has great economic significance. A good roadside filling method should have the advantages of wide sources of filling materials, sufficient anti-deformation ability, strong stability, simple construction technology, safety and reliability, and reasonable economy. At present, most roadside support uses mechanized integral pouring of high-strength concrete as the filling body. However, in the roadway remaining along the goaf, if the denser and less deformable filling materials such as co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/00E21F15/02
CPCE21F15/00E21F15/02
Inventor 段会强郭忠平王磊谢文武
Owner SHANDONG UNIV OF SCI & TECH
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