Process for stoping low coal seam containing ferric sulfide concretions and hard parting bands and hydraulic support thereof for fully mechanized mining

Abstract

The invention relates to a process for stoping low coal seams containing ferric sulfide concretions and hard parting bands, which adopts a fully mechanized mining process to mine coal. Working face equipment comprises a drum shearercoal-mining machine, a hydraulic support, a scraper conveyor, and the like, wherein the drum shearercoal-mining machine adopts a wide high-power high-strength drum for narrow cutting and deep cutting; the hydraulic support adopts a hydraulic shield support for advancingmoving quantitively by in different times and stretching the support in one-stepce; and water is injected into the working face for softening before stoping. The fully mechanized mining level can be enhanced by adopting the scraper conveyor with a middleedian plate straightly arranged at the head and the tail of the scraper conveyor, and a radio remote control method for the coal-mining machineshearer with the working face remote-controlled in segments automatically. The advancing jack hydraulically-controlled loop of the hydraulic support is formed into a separately push / pull and quantitively grouped advance charging loop bycomprises an adjacent support pilot control reversing valve, a differential valve, a quantitive cylinder and an alternate valve which form a separately push / pull and quantitively grouped advance charging loop. The invention can realize the fully mechanized mining forof the low coal seams containing the ferric sulfide concretions and / or the hard parting bands, and solves the difficult problem which is not solved at home and abroad for a long time. The invention can be used for mining low coal seams containing other concretions, ordinary low coal seams, medium-thickness coal seams and high coal seams.

Description

technical field [0001] The invention relates to a coal mining face mining process in a thin coal seam, in particular to a thin coal seam mining process capable of fully mechanized mining in a thin coal seam containing iron sulfide nodules and hard gangue and can meet the requirements of Fully mechanized mining hydraulic supports required by this special process. Background technique [0002] Coal is the main energy source in our country. Coal accounts for about 94% of the proven fossil energy resources. Coal resources will keep my country's coal-based energy structure unchanged for quite a long time. Thin coal seams account for more than 46% of the country's proven coal reserves. With the obvious reduction of medium-thick coal seam reserves in recent years, thin coal seam mining will play an important role in maintaining coal production and meeting the needs of national economic development. At present, the complete set of equipment and technology for fully mechanized mini...

AI Technical Summary

Problems solved by technology

At present, the main mining methods still use traditional drilling blasting and manual shipment, which is labor-intensive, poor in safety, and poor in efficiency.

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