Fully mechanized coal mining method combining steeply inclined long-wall drilling type coal mining machine with hydraulic shield type supports

Abstract

The invention discloses a fully mechanized coal mining method combining a steeply inclined long-wall drilling type coal mining machine with hydraulic shield type supports, and the mining technology comprises the following steps: the space of a mining field are reliably supported by the hydraulic shield type supports; a working face scraper conveyor and the drilling type coal mining machine are mounted, wherein the drilling type coal mining machine rides on the scraper conveyor and the scraper conveyor is a traveling track of the drilling type coal mining machine; the drilling type coal mining machine cuts coal by virtue of a spiral drilling bit, the cutting range is adjusted by rotating a rocker arm of the drilling type coal mining machine and controlling the drilling type coal mining machine to move left and right through oil cylinders on two sides of the scraper conveyor, a coal bed is cut into a slope and the scraper conveyor is used to convey the coal which is cut down to the outside; the scraper conveyor and the drilling type coal mining machine move downwards along the cut slope of the coal bed to determining a new mining target at the deep part of the steeply inclined coal bed; and the hydraulic shield type supports are adjusted in sequence, the hydraulic shield type supports are moved downwards for support a new mining space. The fully mechanized coal mining method is applicable to mechanized mining of the steeply inclined coal bed with the thickness of 2.0-8.0m.

Description

technical field [0001] The invention belongs to the technical field of coal mining technology, and in particular relates to a fully mechanized coal mining method in which a steeply inclined longwall drilling shearer combined with a hydraulic shielding support is suitable for mining steeply inclined coal seams of different thicknesses and angles. Background technique [0002] At present, the mining of steeply inclined coal seams in my country has formed a considerable scale. The mines mining steeply inclined coal seams account for about 20% of the total number of coal mines in my country. About 4%. Due to the complex mining conditions of steeply inclined coal seams in our country, after years of development, great progress has been made in mining technology, and a variety of mining methods suitable for my country's national conditions and coal seam conditions have been created, but there are still many deficiencies in general. For example: the degree of mechanization of mining...

AI Technical Summary

Problems solved by technology

Practice has proved that the flexible cover support and the "7" shaped steel support have little adaptability to the change of coal seam thickness, and the mining space is small, so it is difficult to realize mechanized mining

When the thickness of the coal seam is greater than 4.0m, the support rigidity of the flexible cover support becomes smaller, and the system is prone to instability; as the coal seam mining space moves downward, it is difficult for the above two supports to move downward, and automatic downward movement cannot be realized

Therefore, flexible cover supports and "7"-shaped steel supports are mostly used in the case of small coal seam thickness and little change in coal seam thickness, and most of them adopt blast mining technology, resulting in poor support safety and difficulty adapting to changes in coal seam thickness, resulting in mechanized Low degree, high labor intensity and low mining efficiency

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