论文部分内容阅读
根据平顶山矿区内部分矿井实测三向应力、瓦斯含量、压力值计算了各矿区煤层弹性能及瓦斯膨胀能,并分析了其分布规律及特点,结合平煤矿区3次地质运动及矿区内地质构造特性,得到了突出潜能的主要控制因素并进行突出危险性划区。结果显示:弹性能及瓦斯膨胀能随埋深增加而增加,受地质构造控制作用显著;自重应力场控制区域煤层弹性与瓦斯膨胀能远小于构造应力场控制区域;构造应力控制区域随埋深增加构造控制作用逐渐减弱,转变为自重应力控制作用;自重控制区域煤层单位体积煤体瓦斯膨胀能与弹性近似相等,而构造应力控制区域膨胀能远大于弹性形;地质构造控制着矿区突出潜能的分布,是矿区突出主要控制因素;锅底山与九里山断层间区域危险性最小,锅底山与李口向斜之间突出危险性偏高,而李口向斜东南部区域突出危险性最高。通过对矿区突出点分布情况分析证明了突出危险性划区的正确性。
According to the measured three-directional stress, gas content and pressure in some mines in Pingdingshan coalfield, the elastic properties and gas expansion energies of coal seams in each mining area are calculated. The distribution rules and characteristics are also analyzed. Combining with the three geological movements in Pingdingshan coalmine and the geology Characteristics, have been outstanding potential of the main control factors and highlight the risk of zoning. The results show that the elastic energy and gas expansion energy increase with the increase of burial depth, which is controlled by the geological structure. The elastic and gas expansion of the coal seam in the controlled gravity stress field are far less than those in the tectonic stress field. The tectonic stress control area increases with the buried depth And the tectonic control function gradually weakened and turned into the function of self-weight stress control. The gas expansion energy per unit volume of coalbed in self-contained control zone is approximately equal to that of elasticity, while the expansion stress of tectonic stress control zone is far greater than that of elastic shape. Geological structure controls the distribution of outburst potential , Which is the main controlling factor of the mining area. The least danger is in the area between Panji Hill and Jiulishan Fault, and the prominent danger between Panji Hill and Likou syncline is high, while the prominent danger in the southeastern area of Likou Ortho is the highest. Through the analysis of the distribution of the salient points in the mining area, the correctness of the salient dangerous zoning is proved.