A kind of ultra-short-wall coal mining method

Abstract

The invention discloses a super-short-wall coal mining method. According to the super-short-wall coal mining method, a special air returning roadway for mining small coal pillars at a mining area boundary being about 4m wide is connected with an air returning main roadway and a transportation main roadway; a mining machine at the lower part of the coal pillar is in orbital connection with one roadway so as to be simultaneously used for transporting and introducing air; the roadway is internally provided with a scraper plate conveyor, a reversed loader, a rail and a partial ventilator; a fully mechanized coal mining surface adopts a super-short machine body single-roller coal mining machine with a rocker arm in the middle of a machine body and a fully mechanized coal mining hydraulic bracket is improved; a flexible blower dryer is suspended below a top beam; an independent-head roadway is used for ventilating and the partial ventilator is matched to ventilate in a pressing-in manner. A goaf is treated by adopting a full caving method in a manner of arranging a remained gateway along goaf at the lower side of the goaf. On the basis of reasonably solving the basic problems of a transportation system, a ventilation system and a material transporting and recrement discharging system, the problem that the coal mining machine repeatedly passes through a fault when being used for cutting coal is avoided; the work amount of the roadway is reduced, the boundary coal can be flexibly recycled and the recovery rate is increased.

Description

technical field [0001] The invention belongs to the field of mining engineering, in particular to an ultra-short-wall coal mining method involving the recovery of corner coal and small coal pillars. Background technique [0002] The traditional longwall coal mining roadway layout method with large engineering volume cannot be recovered flexibly. The coal seam is divided into short coal pillars or corner coal by fault structures such as faults, which wastes a lot of resources. The coal resources in China have been increasing in recent years. Under the background of the gradual depletion of the future, the coal mining rate of this traditional coal mining method needs to be improved urgently. Contents of the invention [0003] The object of the present invention is to provide an ultra-short-wall coal mining method, which has the advantages of small excavation engineering volume, high coal cutting efficiency, safe and reliable ventilation, and high resource recycling rate. ...

AI Technical Summary

Problems solved by technology

[0002] The traditional longwall coal mining roadway layout method with large engineering volume cannot be recovered flexibly. The coal seam is divided into short coal pillars or corner coal by fault structures such as faults, which wastes a lot of resources. The coal resources in China have been increasing in recent years. In the context of the gradual depletion of the future, the coal mining rate of this traditional coal mining method needs to be improved urgently.

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