Step type structure filling method for second mining of coal pillars of remnant mining areas

A legacy coal pillar and step-type technology, applied in the direction of filling, ground mining, mining equipment, etc., can solve the problems of surface subsidence buildings, damage and damage of railways and water bodies, and "domino instability and damage of stope filling bodies"

Active Publication Date: 2016-11-16
TAIYUAN UNIV OF TECH
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Problems solved by technology

When the shock wave generated by the instantaneous instability of the stope filling body transfers and spreads to the adjacent filling body, it may cause the "domino" type of instability and

Method used

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  • Step type structure filling method for second mining of coal pillars of remnant mining areas
  • Step type structure filling method for second mining of coal pillars of remnant mining areas
  • Step type structure filling method for second mining of coal pillars of remnant mining areas

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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, a method for filling the remaining coal pillars in the residual mining area with stepped structure will be further described in detail in conjunction with the accompanying drawings.

[0033] Madiwan Coal Mine is a typical resource-short old mine in Loufan County, facing many problems such as stabilizing production, increasing productivity and improving economic benefits. In the 1980s, the No. 9 coal seam of Madiwan Coal Mine was mined by the knife pillar method, which left a large number of coal pillar groups in the knife pillar residual mining area. The remaining coal pillars in the knife-pillar residual mining area of ​​No. 9 coal seam have good re-mining and recovery value, and have increasingly become the foc...

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Abstract

The invention discloses a step type structure filling method for second mining of coal pillars of remnant mining areas. According to the method, on the basis of exploring and ascertaining the remaining coal pillars in the remnant mining areas and pillar mining area distribution situations, step type filling moulds are built and installed; the remaining coal pillars of the remnant mining areas are sequentially side-supported by adoption of a pillar side double-side layered filling method; in addition, a short-wall mechanical second mining working face is arranged; and accordingly, the remaining coal pillars of the remnant mining areas are safely recovered. According to the step type structure filling method for second mining of the coal pillars of the remnant mining areas, the recovery ratio of the coal resources can be increased, the economic benefits can be improved for an enterprise, and dynamic disasters including instantaneous instability, domino instability and the like of pillar type filling bodies in mining fields under the multi-factor coupling effect can also be avoided, so that the long-term stability of the pillar type filling bodies of the mining fields after second mining of the remnant coal is guaranteed.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a method for filling abandoned coal resources in residual mining areas with a stepped structure, and is mainly suitable for safe mining of abandoned coal resources in residual mining areas. Background technique [0002] Restricted by historical technology, economic conditions, etc., many coal mines in my country at the beginning of coal resources have encountered phenomena such as mining thick and discarding thin, mining fat and discarding thin, mining good and discarding inferior, mining easy and discarding difficult, etc., resulting in the abandonment of many coal pillars. At the same time, many mining areas generally adopt column mining to maintain the stability of the overlying rock in the stope, thereby preventing or reducing damage to ground buildings, water bodies, and railways caused by mining. The above-mentioned mining activities left many criss-cross coal pillars of...

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Application Information

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IPC IPC(8): E21C41/18E21F15/00
CPCE21C41/18E21F15/00E21F15/005
Inventor 冯国瑞白锦文戚庭野张玉江郭军李振杜献杰申辰康立勋
Owner TAIYUAN UNIV OF TECH
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