Steeply inclined seam dip oblique strike longwall comprehensive mechanical coal mining method

Abstract

The invention discloses a steeply inclined seam dip oblique strike longwall comprehensive mechanical coal mining method. The method comprises the following steps: preparation: digging a first laneway and a second laneway at the upper end and the lower end of the steeply inclined seam respectively; forming an initial mining working surface with the pitching oblique mining angle alpha of 25 to 35 degrees between the two laneways; arranging a coal mining machine, a scraper plate conveying machine, and a plurality of hydraulic brackets which are parallelogram-shaped in the overhead view and form a supporting system on the initial mining working surface; arranging the machine head of the scraper plate conveying machine behind relative to the machine tail while the hydraulic brackets in the propelling direction are sequentially behind a certain distance from the machine tail of the scraper plate conveying machine; arranging a reversed loader on the second laneway; coal mining: cutting coal up and low by using the coal-mining head of a coal-mining machine; moving the brackets: moving the hydraulic brackets sequentially from bottom to top; pushing and sliding: pushing and sliding by using a scraper trough conveyor of the scraper plate conveying machine in strokes to finish one time pushing and sliding quantity; and transporting coal: transporting coal to the outside by using the reversed loader. According to the method, the steeply inclined seam comprehensive mining operation is realized conveniently, and recovery ratio and resource utilization ratio are increased.

Description

technical field [0001] The invention relates to a comprehensive mechanized coal mining supporting technology for an underground coal mining face in a coal mine, in particular to a method for comprehensive mechanized coal mining in a steeply inclined coal seam with a downward pseudo-slant direction towards a long wall. Background technique [0002] Steeply inclined coal seam refers to a coal seam with an inclination angle greater than 45°, which has the characteristics of wide distribution in my country, complex occurrence conditions, and difficult mining. Due to the backward mining technology and the large number of domestic mines, many major accidents have occurred in my country in recent years. In December 2006, the State Coal Supervision Bureau actively promoted the reform of coal mining technology, eliminated informal coal mining methods, and further improved the safe mining technology of steeply inclined coal seams in response to the lessons learned from major accidents...

AI Technical Summary

Problems solved by technology

[0003] Due to the narrow mining space of the steeply inclined coal seam, the large inclination angle of the working space, the high risk of equipment slipping, and the potential threats such as coal mine gangue splashing, it is difficult for personnel to operate

At the same time, its coal seam structure is complex, with folds and faults, the operating environment is harsh, production safety hazards are many, fully mechanized mining is difficult, and the adaptability requirements for mechanical equipment are particularly high

If the existing fully-mechanized mining technology and equipment are simply applied and the traditional longwall coal mining method is used for comprehensive mining, since the inclination angle of the coal seam and its roof and floor is relatively large during the mining process, the roof and floor of the stope are still in accordance with their Certain inherent regular movements lead to more complex roof beam management than in gently inclined coal seams, and will also face new problems such as mine pressure appearances on working faces that are different from those in gently inclined coal seams

At present, backward support methods such as wooden piles and monomers are usually used for mining. It is difficult to guarantee the safety of personnel, and the recovery rate is low and the waste of resources is serious.

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