Method for filling bilateral parts beside pillar with repeatedly-mined left-over coal pillars in residual mining area

A technology for leftover coal pillars and residual mining areas, which can be used in fillings, ground mining, mining equipment, etc., and can solve problems such as instability and damage, surface subsidence buildings, railway and water damage, rock bursts, etc.

Active Publication Date: 2016-05-04
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 remaining coal pillars may transfer and spread to the adjacent coal pillars, which may cause the "domino" type of instability failure of the remaining coal pillars, and then cause dynamic disasters such as rock bursts, and bring Surface subsidence and damage to buildings, railways and water bodies

Method used

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  • Method for filling bilateral parts beside pillar with repeatedly-mined left-over coal pillars in residual mining area
  • Method for filling bilateral parts beside pillar with repeatedly-mined left-over coal pillars in residual mining area
  • Method for filling bilateral parts beside pillar with repeatedly-mined left-over coal pillars in residual mining area

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Embodiment Construction

[0030] The present invention is further illustrated by the following examples, but not limited to the following examples.

[0031] The Baijiazhuang Coal Mine of Xishan Coal and Electricity Group is a typical resource-scarce old mine, facing many problems such as stabilizing output, increasing productivity and economic benefits. In the 1990s, the No. 8 coal seam 38502 (2), 38502 (3), 38502 (4) and 38502 (5) working faces of Baijiazhuang Coal Mine were mined by the knife column method, which made a large number of remaining coal pillars and Abandon mining. The remaining coal pillar in the knife pillar residual mining area of ​​No. 8 coal seam has good mining value, and has increasingly become the focus of researchers and engineers in recent years. The re-mining of the remaining coal pillars in the residual mining area can not only recycle valuable coal resources, but also avoid the occurrence of dynamic disasters such as instantaneous instability or "domino" instability of the ...

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Abstract

The invention discloses a method for filling bilateral parts beside a pillar with repeatedly-mined left-over coal pillars in a residual mining area. According to the invention, on the basis of exploration and identification of the left-over coal pillars in the residual mining area, the distributive locations and sizes of pillar mining areas, lateral protection of the left-over coal pillars in the residual mining area are successively carried out by using a sectioned filling method for the bilateral parts beside the pillar; a conveyor gateway and an air return gateway are dug in bilateral filling bodies beside the pillar; and short-wall mechanization working faces are arranged for repeated mining of the left-over coal pillars in the residual mining area. The method provided by the invention makes full use of the left-over coal pillars in the residual mining area, alleviates contradiction between finiteness of coal resources and infiniteness of consumer demands, avoids transient instability, domino instability or other dynamic disasters caused by coal pillars left by pillar mining under action of long-term creep effect, and guarantees safe repeated mining of the left-over coal pillars in the residual mining area by using the bilateral filling bodies beside the pillar.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a method for partially filling leftover coal pillars in re-mined residual mining areas on both sides of pillars, and is mainly suitable for safe mining of leftover coal pillars in residual mining areas. Background technique [0002] In recent years, the re-mining of the remaining coal pillars in the residual mining area has increasingly become the focus of attention, and it has good mining value. The remaining coal pillars in the residual mining area can alleviate the contradiction between the limited coal resources and the unlimited consumption demand, not only can improve the recovery rate of coal resources, improve the economic benefits of enterprises, but also prolong the service life of mines and promote sustainable development. [0003] Due to the constraints of technology, economy and other factors, in order to pursue short-term interests in some coal mines in my count...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/18E21F15/00C04B28/02C04B18/08C04B18/12C04B18/16
CPCC04B28/02C04B2111/00724E21C41/18E21F15/00C04B18/08C04B18/12C04B18/16Y02W30/91
Inventor 冯国瑞白锦文戚庭野章敏张玉江郭军郭峰王泽华康立勋
Owner TAIYUAN UNIV OF TECH
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