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根据鹤壁矿区实测煤层瓦斯含量和瓦斯压力结果,从力能角度分析了地应力、瓦斯、煤体结构对煤与瓦斯突出的影响,确定了地应力为鹤壁矿区煤与瓦斯突出的主控因素。受区域地质构造的控制,南部矿井构造应力大,瓦斯含量高,煤岩体弹性潜能、瓦斯膨胀能大;且构造煤普遍发育,煤体破碎功小。基于力能角度分析,南部矿井在埋藏较浅处,突出动力能量即大于突出阻力能量,是其始突深度较浅的主要原因,鹤壁矿区始突深度呈现南浅北深的特点。在地应力控制作用的基础上,结合三矿实测瓦斯压力、瓦斯突出能量分析,确定三矿在煤层底板标高-510 m以深为突出危险区。
According to the measured coal seam gas content and gas pressure results in Hebi mining area, the influence of geostress, gas and coal structure on coal and gas outburst was analyzed from the perspective of power and the main controlling factor of ground stress for coal and gas outburst in Hebi mining area was determined. Under the control of the regional geological structure, the southern coal mine has high tectonic stress, high gas content, elastic potential of coal and rock mass, and large gas expansion energy. The tectonic coal is generally developed and the coal crushing work is small. Based on the analysis of force and energy, the shallow burial depth of the southern coal mine is the main reason that the initial energy density is greater than the outstanding resistance energy. Based on the role of geostrophic stress control, combined with the measured gas pressure and gas outburst energy analysis in No.3 Mine, it is determined that the seam height of the seam in the bottom of the coal seam at a depth of -510 m is the prominent danger zone.