Construction method for mine shaft through multilayer goaf

A construction method and technology for goafs, which are used in surface mining, mining equipment, earth-moving drilling, etc.

Active Publication Date: 2011-05-25
DATONG COAL MINE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] At present, the research on the construction of the wellbore crossing the goaf is basically still blank

Method used

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Experimental program
Comparison scheme
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Embodiment Construction

[0018] The construction method of the coal mine shaft passing through the multi-layer goaf adopts the following steps: 1) detection of the goaf ground and underground; 2) mechanical analysis of the goaf rock formation; 3) goaf filling range and Determination of the mechanical properties of the filling; 4), bedrock excavation; 5), construction of related chambers that are completely connected to the shaft; 6), filling and reinforcement of the goaf;

[0019] The bedrock excavation adopts the following steps: 1) Umbrella drills, drill rods and cross-shaped drill bits are used to drill holes, and the straight holes are segmented and squeezed; 2) The working face is drilled and cleaned, and then the charging line is fired ; 3), grabbing rocks and discharging gangue; 4), reinforcing steel bars; 5), building walls;

[0020] To fill and reinforce the goaf, the following steps are adopted: 1) Set up wooden point columns for temporary support, and then use the shaft of the return air sh...

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PUM

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Abstract

The invention particularly discloses a construction method for a mine shaft through multilayer goaf, which solves the problem of blankness of the construction method for the conventional mine shaft through goaf. The method comprises the following steps that: 1) the ground and the underground space of the goaf are detected; 2) mechanical analysis is performed on a rock stratum of the goaf; 3) a goaf filling range and filler mechanical property are determined; 4) bedrock is tunneled; 5) a related underground chamber which is integrally connected with a shaft is constructed; and 6) the goaf is filled and reinforced. The construction method fills the blank of the construction method for the shaft through goaf; back filling injection, filling and reinforcing technology is used during the construction of a through goaf of a vertical shaft; the construction method has an advanced, economic and rational technology; the goaf can be completely closed; return current is prevented from entering the goaf, so a coal seam of the goaf has a tendency to spontaneous combustion; thus safe and reliable use of the shaft is guaranteed.

Description

technical field [0001] The invention relates to a construction method of a coal mine, in particular to a construction method for a coal mine shaft passing through a multi-layer goaf. Background technique [0002] There are Jurassic and Carboniferous Permian coal measure strata in the dual system coalfield. In recent years, with the depletion of Jurassic coal seam reserves, in order to ensure the normal replacement of mines, coal mines have been built to mine Carboniferous Permian coal seams. [0003] The Jurassic coal measures contain as many as 15 layers of mineable coal seams, and the mining of coal resources has a long history, so there are multi-layered goafs of different sizes and shapes in the mining area. Due to the variety of mining techniques used, the spatial scale and shape of the gobs formed, the structural characteristics of rock formations and the state of movement and damage, and the occurrence of water, harmful gases and fire areas are also different. Coupl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16E21F15/00E21D9/00
Inventor 张有喜李兴郭海杨智文刘建高王爱国张学峰康福钧李燕飞庞有恒张春山关占海蔡海韩世泽朱云张德良王成冯月新马锦章
Owner DATONG COAL MINE GRP
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