小断层两盘瓦斯地质特征及防突措施强化研究

煤层小断层是影响煤与瓦斯突出的重要因素,采用现场实测与理论分析相结合的方法,对小断层两盘瓦斯地质特征及强化防突措施进行了研究。研究结果表明，断层两盘地应力、煤层瓦斯和煤的物理力学性质均是变化的,而且上盘影响范围和幅度也大于下盘,断层两盘瓦斯地质特征受断层成因控制,距小断层一定距离处发生煤与瓦斯突出的危险性最大,可以通过加密抽采钻孔或增大卸煤量的强化防突措施进行消突。

Study on gas geological characteristics and strengthening outburst prevention measures in two pans of small faults

Small faults in coal seams were important factors affecting coal and gas outburst.By combining the method of field measurement and theoretical analysis,the gas geological characteristics of the two sides of the small faults and the measures to strengthen the outburst were studied.The research results showed that the in-situ stress,coal seam gas and the physical and mechanical properties of coal were all changed on the two sides of the fault,and the influence range and amplitude of the hanging wall were also larger than those of the foot wall.The danger of coal and gas outburst at the distance was the greatest,and the outburst could be eliminated by intensifying the drilling hole or increasing the coal unloading amount.