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A method of filling and strengthening with the support withdrawn to reduce the protective coal pillar

A technology for protecting coal pillars and coal pillars, applied in the direction of fillings, pillars/supports, earthwork drilling and mining, etc., can solve problems such as loss of coal resources, and achieve the effect of increasing coal recovery

Active Publication Date: 2022-04-12
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in order to ensure the safe use of roads or uphill and downhill in coal mine production, protective coal pillars with relatively large widths are still left, resulting in a large loss of coal resources

Method used

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  • A method of filling and strengthening with the support withdrawn to reduce the protective coal pillar
  • A method of filling and strengthening with the support withdrawn to reduce the protective coal pillar
  • A method of filling and strengthening with the support withdrawn to reduce the protective coal pillar

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] A method for filling and reinforcing with the support withdrawn to reduce the protective coal pillar, including the following steps:

[0032] first step, such as figure 1 As shown, determine the position of the new shutdown line 2 of the coal mining face, that is, determine the minimum width of the roadway or the protection coal pillar 5 of the uphill and downhill

[0033] In order to ensure that the roadway or the uphill and downhill still has good stability under the condition of reducing the width of the protective coal pillar, it is necessary to ensure the integrity of the original support structure of the roadway or uphill and downhill and the anchorage end of the support body on the elastic coal body.

[0034] Such as figure 1 As shown, the position of the new stop production line, that is, the minimum width L of the roadway or the protection coal pil...

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Abstract

The invention discloses a method for filling and reinforcing with the withdrawal of supports to realize the reduction of protective coal pillars, which comprises the following steps: the first step is to determine the position of the stop line of the coal mining face; the second step is to calculate The width of the filling body wall; in the third step, the filling wall masonry is carried out along the coal wall with the withdrawal of the hydraulic support, and a filling body with the same length as the working face is formed after the hydraulic support is completely withdrawn. The invention can solve the problem that the width of the coal mining pillar at the end of the roadway or the upper and lower hills is too large, and the filling body is built in the retraction channel to support the load of the overlying rock layer together with the coal pillar, thereby reducing the width of the roadway or the upper and lower hills. The width of the original coal mining pillar, while ensuring the safe use of the main road or going up and down the mountain.

Description

technical field [0001] The invention belongs to the field of coal mining, and in particular relates to a method for filling and reinforcing with the withdrawal of the support of the working face to realize the reduction of the roadway or the method of protecting coal pillars up and down the mountain Background technique [0002] The basic preparation methods of coal mines in my country include three types: mining area type, panel area type and belt area type. Among them, the mining area type and panel type are to arrange coal mining faces on both sides of the upper and lower sides of the mountain, and the belt area type is to arrange coal mining faces on both sides of the road. The coal mining face is arranged on the side. In order to prevent the mining of the working face from affecting the stability of the main road or going up and down the hill, a protective coal pillar with a certain width needs to be left between the stop mining line and the main road or going up and dow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D15/00E21D15/44E21F15/00E21F17/00E21F17/18
CPCE21F15/00E21D15/005E21D15/44E21F17/18E21F17/00
Inventor 王志强乔建永王鹏张焦
Owner CHINA UNIV OF MINING & TECH (BEIJING)