Arrangement process for recovering remaining coal pillars and treating ground gangue in room type coal mining method

Abstract

The invention discloses an arrangement process for recovering remaining coal pillars and treating ground gangue in a room type coal mining method, which is suitable for recovering the remaining coal pillars and treating the ground gangue after the room type coal mining method is adopted in a coal mine. The arrangement process comprises the following steps of firstly, hanging wind shielding curtains between the adjacent coal pillars on the outer sides of the coal pillars so as to form an air inlet and return system for normal recovery, then partitioning remaining coal houses and the coal pillars, closing the coal houses between the room type coal pillars by adopting baffles, and finally, densely filling a space formed by closing the baffles and the coal pillars in a roof contact mode by adopting a paste filling material; recovering the coal pillars between two adjacent paste bodies by using a continuous miner or a heading machine after the adjacent filling paste bodies are solidified; and filling the mining space with gangue by using a gangue throwing machine after the coal pillars are recovered. According to the process, the remaining coal pillars in the room type coal mining method are recovered, additionally, the accumulation and discharge of ground gangue are reduced, and the filled paste bodies and the gangue can be used cooperatively so as to jointly control the caving ofan overlying rock layer, so that the ground subsidence is controlled.

Description

technical field [0001] The invention belongs to the technical field of coal mining, and in particular relates to an arrangement process for leftover coal pillars and gangue on the ground in the recovery chamber mining method, and is mainly applicable to mines mined by the chamber mining method. Background technique [0002] With the high-intensity mining of coal resources in my country, the shallow resources are gradually exhausted, and the mining depth of coal mines is increasing year by year, and the mining depth of many mines has exceeded 1000m. During the mining process of shallow coal resources, due to the low degree of mechanization at that time and the relatively backward prevention and control technology for roof disasters, many mines adopted the room-type coal mining method to recover shallow resources. The main feature of this method is that a series of coal houses with a width of 5-7m are arranged in the coal seam, and a narrow working face is formed during mining...

AI Technical Summary

Problems solved by technology

[0003] In view of the waste of resources caused by the coal pillars left by the room mining method, the safe mining of coal seams under the influence and the extension of the service life of resource-exhausted mines, etc., a layout process for the coal pillars left by the recovery room coal mining method and the treatment of ground gangue is provided.

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