Method of beside-pillar double-side partial-filling ascending re-mining overhead coal seam

A side part and kick-off technology, which is applied in the direction of filling, ground mining, mining equipment, etc., can solve problems such as rock burst, threat to safe and efficient production, instability and damage, etc.

Active Publication Date: 2015-08-12
TAIYUAN UNIV OF TECH
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Problems solved by technology

At this time, the failure wave generated by the instantaneous instability of the above-mentioned coal pillars may transfer and spread to the adjacent coal pillars, causing the "domino"-style instability and failure of the coal pillars in

Method used

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  • Method of beside-pillar double-side partial-filling ascending re-mining overhead coal seam
  • Method of beside-pillar double-side partial-filling ascending re-mining overhead coal seam
  • Method of beside-pillar double-side partial-filling ascending re-mining overhead coal seam

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Embodiment Construction

[0031] The following examples are intended to illustrate and explain the present invention, but not to limit the scope of the present invention.

[0032] In order to have a clearer understanding of the technical objectives, features and effects of the present invention, the method for filling up the double-side part of the column side partly filling the upward re-mining of the empty coal seam will be further described in detail in conjunction with the accompanying drawings.

[0033] In the 1990s, the Baijiazhuang Coal Mine of Xishan Coal and Electricity Group surpassed the No. 6 coal seam and gave priority to mining the lower No. 8 coal seam. At present, the ground position of the No. 6 coal seam 36703 working face of Baijiazhuang Coal Mine is located in the mountainous area southwest of Yeyu Fengshaft. The right part is the unmined area of ​​the 36701 working face, and the lower part is the 38502 knife-pillar goaf, which belongs to the typical knife-pillar residual mining are...

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Abstract

The invention discloses a method of a beside-pillar double-side partial-filling ascending re-mining overhead coal seam. In the invention, on the basis of determining overhead coal seam mining feasibility and detecting distribution situations of a coal pillar group and a mined area group of a reamer-pillar remnant mining area, a beside-pillar double-side partial-filling method is employed for successively side-protecting the coal pillar group in the underlie reamer-pillar remnant mining area of the overhead coal seam and gradually mining the overhead coal resources. By means of the method, a beside-pillar double-side filling body formed in the mined area group can not only achieve a side-protecting effect on the reamer-pillar coal pillar group but also form a common bearing body therewith, thereby further reducing degree of stress concentration and creep deformation of the coal pillar group. The method can enhance long-term stability, can avoid local instantaneous unstability or domino-like unstable damage and finally can ensure safe mining of the overhead coal seam of the reamer-pillar remnant mining area.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a method for partially filling up the double-side hollow coal seam by side columns, which is mainly applicable to the safe mining of the hollow coal seam overlying the knife-pillar residual mining area. Background technique [0002] At present, the contradiction between limited coal resources and unlimited consumption demand is becoming increasingly prominent. The re-mining of residual coal is an important measure to alleviate the above contradictions. The re-mining of residual coal can not only increase the recovery rate of coal resources and improve the economic benefits of enterprises, but also prolong the service life of mines and promote sustainable development. [0003] In recent years, upward mining in the residual mining area of ​​coal mines has increasingly become the focus of attention. Affected by early mining, the integrity and stability of the empty coal seam a...

Claims

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Application Information

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IPC IPC(8): E21C41/16E21F15/00
CPCE21C41/18E21F15/005E21F15/08
Inventor 冯国瑞白锦文李振张玉江戚庭野郭军张钰亭康立勋
Owner TAIYUAN UNIV OF TECH
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