METHOD FOR PREVENTION AND CONTROL OF SUDDEN ZONAL COAL AND GAS EMISSIONS

摘要

FIELD: mining.;SUBSTANCE: invention relates to a method for prevention and control of sudden zonal emissions of coal and gas from coal beds. A method for prevention and control of sudden zonal coal and gas emissions, according to which a mining area is divided into mining zones (5) by distribution of defects and corrugations in a deposit so that boundaries of mining zones (5) are located as far as possible in axial parts of defects or corrugations. Direction of maximum stress is determined in soil along horizontal direction in mining zone (5) by a conventional test method of stress in soil. With that, when an adjacent angle between the measured direction of maximum stress in soil along the horizontal direction and along the direction of strike of a coal bed is less than 45°, inlet ventilation opening (4) and ventilation opening (3) for a backward jet is located for the mining zone along the coal bed inclination and then strike entry driving is performed. Then the inlet ventilation opening (1) and ventilation opening (2) for the backward jet is located for a working face along the direction of strike of a coal bed and then strike entry driving is performed so that there can be performed mining operations in the working face (6) located along the direction of strike of a coal bed. When an adjacent angle between the measured direction of maximum stress in soil along the horizontal direction and along the direction of strike of a coal bed is more than 45°, inlet ventilation opening (4) and ventilation opening (3) for a backward jet is located for the mining zone along the direction of strike of a coal bed and then strike entry driving is performed. Then the inlet ventilation opening (1) and ventilation opening (2) for the backward jet is located for a working face along the coal bed inclination and then strike entry driving is performed so that there can be performed mining operations in working face (6) located along the coal bed inclination.;EFFECT: simplifying the method, obtaining a favourable effect of prevention of sudden emissions and reducing concentration of stress in a working face.;2 dwg