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基于我国高应力、高瓦斯和低透气性煤层赋存特点及目前煤矿区域瓦斯治理过程中存在的问题,研究了炸药在水中爆炸时煤体的应力变化、裂隙扩展等过程,数值模拟了水压爆破孔的有效影响半径,提出了将炸药的爆炸能量和水有机结合的水压爆破技术。该技术在国内有关矿井进行了应用,应用结果表明:水压爆轰产物在一定范围内使围岩和煤层应力发生改变,并沿前方煤体和巷道两帮转移,减少突出势能;同时提高煤层透气性,提高区域抽采效率,缩短区域抽采时间,有效地防治了煤与瓦斯突出和冲击地压,具有广泛的应用前景。
Based on the occurrence characteristics of high-stress, high-gas and low-permeability coal seams in our country and the existing problems in gas treatment in the coal mine, the process of stress changes and crack propagation of explosives in water explosion was studied. The effects of water pressure Blasting hole effective impact radius, the blasting energy of explosives and water combined with water pressure blasting technology. The application of the technology in the domestic mine, the application results show that: the hydraulic detonation products within a certain range of stress and surrounding rock and coal seam changes along the coal and roadway in front of the two groups to shift to reduce the prominent potential energy; at the same time to improve the coal seam Permeability, improve the efficiency of regional extraction, shorten the area extraction time, effectively prevent the outburst of coal and gas and rockburst, has a wide range of applications.