Strike wall fully mechanized caving mining method in the high section of large inclined and extra-thick coal seam

Abstract

The invention discloses a fully mechanized caving coal mining method in the high section towards the wall of a large inclined ultra-thick coal seam. Multiple coal mining sections in the same stage are respectively mined from top to bottom. The mining process is as follows: 1. Coal mining work Face determination: determine the coal mining face in the coal mining section in the current mining stage; Mining working face; the coal mining working face is divided into the lower working face and the upper working face above the lower working face, the lower working face is arranged as a broken line working face, and the upper working face is a straight line working face; 2. Section height determination 3. Coal seam mining: Mining a plurality of coal mining sections respectively. The method of the invention is simple, reasonable in design, convenient in construction, high in mining efficiency, safe and reliable in the mining process, and can effectively solve the problems of high mining difficulty, low safety factor, and inability to realize high-efficiency mining in the mining process of large inclined and extra-thick coal seams.

Description

technical field [0001] The invention belongs to the technical field of coal mine mining, and in particular relates to a fully mechanized caving coal mining method in the high section towards the wall of a large inclined ultra-thick coal seam. Background technique [0002] Highly inclined and extra-thick coal seams refer to coal seams with an inclination angle of α=55°~75° and a thickness of more than 4.5m. They occur in Russia, Ukraine, Poland and other countries and western my country, especially in Xinjiang, where the reserves are large and mining is extremely difficult. Big. For a long time, small coal mines mining such coal seams have generally adopted traditional and backward non-mechanized coal mining methods, such as stacking, warehousing, steps, and roadway laying, etc., which have high labor intensity, poor working environment, many safety accidents, and high production efficiency. low-level defects. Since the 1970s, medium-sized coal mines have gradually tested an...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a fully mechanized caving coal mining method in the high section of a large inclined and extra-thick coal seam, which is simple in method, reasonable in design, convenient in construction and high in mining efficiency, in view of the above-mentioned deficiencies in the prior art. The mining process is safe and reliable, and can effectively solve problems such as difficult mining, low safety factor, and inability to achieve high-efficiency mining in the mining process of large inclined and extra-thick coal seams

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