Method for mining coal of steeply inclined thin seam

Abstract

The invention provides a method for mining coal of a steeply inclined thin seam on the basis of learning from a long-hole blasting coal mining method and a wire saw coal mining method, which is a long-hole blasting and wire saw coal mining method and relates to underground coal mining. The method comprises the following steps: long boreholes are arranged in a direction which is parallel to the cross pitch of the coal seam for coal blasting; after finishing blasting a work surface, making the coal slip out from a section coal bin and loading the coal for outward transport through a haulage drift; and when blasting to the vicinity of a tailgate through the long boreholes, stopping the blasting and utilizing a wire saw to mine remaining coal. The method has the advantages of no work surface support, rational tunnel arrangement, simple ventilation management, the capacity of realizing unmanned work surface mining, low cost, strong security, high coal mining rate, low worker labor intensity, good social and economic benefits and the like.

Description

Technical field: [0001] The invention relates to a mining method for coal, in particular to a mining method for steeply inclined thin coal seams. Background technique: [0002] For the mining of steeply inclined thin coal seams, there are mainly inverted bench mining methods, pseudo oblique strike longwall mining methods, wire rope saw mining methods and flexible shield support mining methods. Due to the characteristics of high labor intensity, low productivity, heavy roof management workload, and easy accumulation of gas, the inverted step coal mining method is currently used less and less. The longwall coal mining method with dipping and pseudo-sloping trend has the disadvantages of large workload of supporting and returning pillars at the working face, inconvenient operation for workers, high labor intensity, large loss of coal pillars in sections, and high cost. The storage coal mining method has the disadvantages of heavy workload of workers, easy fragmentation of coal...

AI Technical Summary

Problems solved by technology

Due to the characteristics of high labor intensity, low productivity, heavy roof management workload, and easy accumulation of gas, the inverted step mining method is currently used less and less.

The longwall coal mining method with dipping and pseudo-sloping trend has the disadvantages of large workload of supporting and returning pillars at the working face, inconvenient operation for workers, high labor intensity, large loss of coal pillars in sections, and high cost

The storage coal mining method has the disadvantages of heavy workload of workers, easy coal wall to hurt people, poor safety, low recovery rate, etc.

Although the wire saw coal mining method realizes unmanned working face mining, it is only suitable for coal seams with soft coal quality

Due to the characteristics of poor adaptability to coal seam thickness, inclination angle and other occurrence conditions, the flexible cover support coal mining method is also limited in its application

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