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Non-chain-pillar roadway protection method adopting filling beside thin coal seam roadway

A technology with no coal pillars and thin coal seams, which is applied in the direction of filling, earthwork drilling, safety devices, etc., can solve the problems of high cost, poor effect of roadway retention, and high labor intensity, so as to achieve convenient operation, ensure the stability of surrounding rock, The effect of high degree of mechanization

Inactive Publication Date: 2013-06-12
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] In my country, roadside filling technology for roadway protection without coal pillars mainly adopts dense pillars, wooden stacks, concrete blocks and gangue filling, which have disadvantages such as poor effect of roadway retention, high cost and high labor intensity.

Method used

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  • Non-chain-pillar roadway protection method adopting filling beside thin coal seam roadway

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Embodiment Construction

[0022] Combined with the accompanying drawings, a roadway protection method for filling non-coal pillars next to a thin coal seam roadway, the roadway support is based on the original anchor net support, supplemented with anchor cables and additional single hydraulic props to strengthen the support, the roadway The side support is bag-filled with high-water materials. Specifically include the following steps:

[0023] (1) Reinforcement and support of the roadway roof: Anchor cables are added in the reserved roadway and within 20m of the advanced working face. The anchor cables are arranged along the axis of the roadway, one every 3m, and the length of the anchor cables is set to 5m.

[0024] (2) Roadway advance support: Add single hydraulic props in the reserved roadway and within 20m of the advance working face; single hydraulic props are also arranged along the axis of the roadway, and a group of 2 pieces is arranged every 1.5m.

[0025] (3) Rock strata control above the fi...

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Abstract

The invention discloses a non-chain-pillar roadway protection method adopting filling beside a thin coal seam roadway. A roadway inner support is characterized in that on the basis of an original anchor net support, an anchor cable is supplemented and a single hydraulic prop is added so as to enhance the support, and a roadway side support adopts high-water material bag type filling. Two rows of anchor rods are arranged in the top plate position of a filling body so as to maintain the completeness of top covers above the filling body; a wooden wedge is wedged between the filling body and the top plate to ensure tight roof-contacted filling of the filling body; and the filling body is formed under the action of vitex basketry and filling bags. The method has the advantages of simple processing, high construction speed, good roadway retaining effect, and the like, so that the roadway deformation is controlled excellently, a gob is closed, and the naturally igniting hazard of the gob caused by air leakage is eliminated effectively.

Description

technical field [0001] The invention relates to a roadway protection method for filling without coal pillars next to a roadway in a thin coal seam, and belongs to the field of roadway support in the coal mining process. Background technique [0002] Coal pillars are generally used to protect the roadway in the traditional section roadway. With the increase of mining depth, the mine pressure after mining becomes more and more severe, and the width of coal pillars in roadway protection is required to be larger and larger, which increases the loss of coal resources and easily induces rock burst in coal mines. The above problems can be solved by adopting roadside filling technology for roadway protection without coal pillars. The characteristics of roadway filling technology without coal pillars are reflected in: ① canceling the coal pillars in the roadway protection, which improves the recovery rate of coal resources; Hidden safety hazards such as rock burst, coal outburst, a...

Claims

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Application Information

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IPC IPC(8): E21F15/00E21F15/04E21D20/00
Inventor 郭忠平闫莎莎陈道志黄万朋杨永杰
Owner SHANDONG UNIV OF SCI & TECH
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