Bidirectional U-shaped coal-mining method of thick coal bed by gateway layout along stability layer

A coal mining method and thick coal seam technology, applied in ground mining, mining equipment, earthwork drilling and mining, etc., can solve the problems of increased section coal pillar width, difficulty in roadway excavation and support, and influence on roadway excavation speed, etc., to achieve improved The effect of improving the recovery rate, reducing the loss of coal pillars, and speeding up the excavation speed
CN101915099AInactive Publication Date: 2010-12-15TAIYUAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TAIYUAN UNIV OF TECH
Publication Date
2010-12-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a bidirectional U-shaped coal-mining method of a thick coal bed by gateway layout along a stability layer. The method comprises the following steps of: firstly, tunneling all gateways of a mine along the stability layer so that top plates of the tunnels form the stability layer of the coal bed; and arranging actual mining gateways along the stability layer so that working surfaces form a bidirectional U shape along the lengths and the advancing directions, wherein a three-section actual mining process, including sapping, leveling and climbing, is adopted on the actual mining of the working surfaces along the lengths and the advancing directions. The method radically solves the difficulties in tunneling and supporting of gateway layout along soleplate in a thick coal bed in the prior art, lessens the coal pillar loss among adjacent working surfaces and is beneficial to the gas drainage of the working surfaces particularly at an upper corner. The invention is suitable for the fully-mechanized mining with large mining height and the sub-level caving mining of the loose and broken thick coal bed.
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Description

technical field

[0001] The invention relates to a thick coal seam coal mining method, in particular to a two-way concave-shaped coal mining method in which soft and broken thick coal seams are distributed along stable layers. Background technique

[0002] Existing thick coal seam mining methods are divided into three types: layered mining, top-coal caving mining and fully-mechanized mining with large mining height. Layered mining was widely used before the 1980s. However, due to the large amount of roadway excavation, low work efficiency, high production costs and the difficulty of roadway excavation, goaf accumulation of water, natural combustion of gas and coal, etc. impact, has been less applied. Fully mechanized mining with high mining height and top-coal caving mining are the main methods of thick coal seam mining. In the current fully mechanized mining with high mining height and top-coal caving mining, the roadways such as the upper and lower troughs and cut holes o...

Claims

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