煤层释放瓦斯膨胀能研究  

Research on dilatation energy of released gas from coal seam

作　　者：于宝海[1] 王德明[1] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,安全工程学院,江苏徐州221116

出　　处：《采矿与安全工程学报》2013年第5期773-777,共5页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51174198);煤炭资源与安全开采国家重点实验室自主课题项目(SKLCRSM11X01)

摘　　要：针对煤与瓦斯突出危险性预测问题,对煤层释放瓦斯膨胀能进行了深入研究。根据瓦斯膨胀能基本计算方法,以煤层瓦斯流动压力场分布规律为基础,分别建立了煤壁释放瓦斯膨胀能和钻孔释放瓦斯膨胀能理论方程式;并应用MATLAB数值模拟软件,进一步对钻孔释放瓦斯膨胀能进行了分析计算。结果表明:钻孔释放瓦斯膨胀能在释放时间前3 s内下降急聚,且该能量大小受煤层瓦斯压力影响最大,受透气性系数影响次之,受瓦斯含量系数影响最小。钻孔释放瓦斯膨胀能真实反映了实际煤层瞬间释放瓦斯的能力,矿井在煤层瓦斯压力测定时,通过实测钻孔释放瓦斯膨胀能,可以准确预测煤层突出危险性。Aiming at the problems about prediction techniques for coal and gas outburst hazard, an in-depth study on dilatation energy of released gas from coal seam is conducted. Following the basic calculation methods of dilatation energy, based on the distribution rules of gas released from coal seam, the theoretical equations of dilatation energy of released gas from coal ribs and drilling boreholes have been derived respectively. In addition, by using the numerical simulation software of MATLAB, dilata- tion energy released from the drilling boreholes was further analyzed and calculated. The results show that there is a sharp decrease for the value of dilatation energy of released gas within the first 3 seconds in releasing time. The biggest factor affecting the energy is coal in-seam gas pressure; the second big- gest factor is permeability coefficient; while the least one is the coefficient of gas content. Therefore, the dilatation energy of released gas from drilling boreholes can really reflect the instantaneous gas release ability of a coal seam. The measurement result of dilatation energy can be used as a predictor for the risk of coal outburst hazard when the coal in-seam gas oressure is determined in a field test.

关 键 词：钻孔释放瓦斯膨胀能 煤壁释放瓦斯膨胀能 数值计算 煤与瓦斯突出 

分 类 号：TD713[矿业工程—矿井通风与安全]