Long-wall fully mechanized reclaiming room-type coal column mining method

Abstract

A method for longwall fully mechanized mining to reclaim room-type coal pillars. A windshield curtain is hung between the first row of coal pillars in the fully mechanized mining face and the coal pillars on both sides of the air inlet lane and the air return lane to form a Carry out the ventilation system for longwall fully mechanized mining; arrange fully mechanized mining equipment on the fully mechanized mining face; use single pillars or wooden piles to provide advanced support for the roof of the air inlet and return airways within 30m in front of the fully mechanized mining face; Arrange a row of high support resistance hydraulic supports in the coal room 5m ahead of the advancing direction of the fully mechanized mining face, and then recover the first row of coal pillars; The windshield curtain is hung between the coal pillars to ensure the formation of a ventilation system when the next row of coal pillars is recovered; the high support resistance hydraulic support moves with the hydraulic support of the fully mechanized mining face, and the distance between the two is always about 5m, so that Coal pillars are continuously recovered. The method can recover more than 85% of the permanent coal pillars left by room type mining, and the method is simple and has wide applicability.

Description

technical field [0001] The invention relates to a method for recovering a room-type mining coal pillar in a coal mine, in particular to a method for recovering a room-type mining coal pillar by long-wall fully mechanized mining. Background technique [0002] Leaving coal pillars after room mining has become a major problem faced by coal mines in western my country. The room type coal mining method makes a large amount of coal left in the underground in the form of residual coal pillars, and the coal recovery rate is only about 30%, resulting in a serious waste of coal resources. With the increasing shortage of energy resources, how to recover the coal pillars left by room mining has become a very urgent task. If this situation is not effectively resolved, it will not only result in a great waste of resources and greatly shorten the service life of mines, but also bring a series of social problems such as employment and stability to the country. [0003] At present, the way...

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Problems solved by technology

However, the above-mentioned practices and attempts have a relatively low degree of mechanization, poor production efficiency, small scale or some are in the research stage

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