Combined spontaneous gas and coal combustion control method during roof cutting lane forming non-pillar mining

Abstract

The invention discloses a combined spontaneous gas and coal combustion control method during roof cutting lane forming non-pillar mining. A middle laneway left in a roof cutting lane forming non-pillar technology is fully used; in the combined spontaneous gas and coal combustion control method, an E-shaped working face ventilating system and a goaf stepping-type pipelaying and liquid carbon dioxide injection technology are used; the E-shaped working face ventilating system consists of two side laneways, a middle laneway, mining area downhill (uphill) lanes and contact lanes; the E-shaped working face ventilating system is used for controlling gas gushing from a current stoping working face; the goaf stepping-type pipelaying and liquid carbon dioxide injection technology is used for controlling spontaneous coal combustion in a goaf. By the combined spontaneous gas and coal combustion control method used in the stoping working face, the gushing amount of the gas during stoping of the working face is effectively reduced, dangers of gas over-limitation in the stoping working face and spontaneous coal combustion in the goaf are avoided, the stoping speed of the working face is increased, the coal recycling rate and the working face stoping connection speed are increased, and the safe production of the working face is guaranteed.

Description

technical field [0001] The invention belongs to the technical fields of mine ventilation and gas prevention and the like, and in particular relates to a method for co-controlling gas and coal spontaneous combustion in mining without coal pillars by cutting roofs and forming lanes. Background technique [0002] Gobside retaining technology is the main development direction of gobside protection in deep coal mining in my country. This technology can realize coal pillar-free mining, has the advantages of high resource recovery rate and low mining-digging ratio, and can avoid the damage caused by leaving coal pillars. Rockburst to achieve reciprocating mining at the working face, thereby eliminating the isolated working face; domestic and foreign scholars and engineers and technicians have done a lot of research work on this technology, and have achieved certain projects in thin coal seams, medium-thick coal seams and fully mechanized caving coal seams. practical application. How...

AI Technical Summary

Problems solved by technology

At present, the roof-cutting and roadway mining technology without coal pillars mainly adopts the Y-shaped ventilation method to control the gas problem in the current mining face, but the Y-shaped ventilation method has the problem of a large amount of air leakage in the goaf. For the mining of spontaneously combustible coal seams, a large amount of air leakage will cause Serious coal spontaneous combustion problem, which threatens the safe mining of coal seams

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