千米深井首采工作面超前扰动影响范围研究

为了研究千米深井冲击地压防治工程难题，基于理论研究和现场实测分析，探索了当前地质及开采技术条件下首采工作面的超前扰动影响范围。结果表明：基于载荷三带理论与微震实测数据分析，首采工作面即时加载带为煤层上方37.2m，延时加载带为煤层上方37.2～73.7m，静载带为煤层上方73.7m至地表|基于理论计算得到超前支承压力影响范围为工作面前方104.4m，微震揭示的首采工作面超前扰动影响范围为115～120m，钻孔应力监测揭示的超前影响范围为92～101m|基于微震监测揭示的岩层断裂角在走向上约为52°，倾向上约为60°。

Analysis of the influence range of the advance disturbance in the first mining face of a kilometer deep well

In view of the engineering problems of rockburst prevention and control in a kilometer deep well, taking the first mining face of Shuanghe coal mine as the engineering background, through theoretical research and field measurement and analysis, the law of the first mining face's mine pressure under the current geological and mining technology conditions is explored. The conclusions are as follows: (1) based on the analysis of load three zone theory and microseismic measured data, the thickness of immediate loading zone in the first mining face is 23.8-37.2m above the coal seam, the thickness of delayed loading zone is 60-73.7m above the coal seam, and the static loading zone is 73.7m above the coal seam to the surface; (2) the influence range of advance disturbance in the first mining face revealed by microseismic is 120m, and the advance influence range revealed by borehole stress monitoring is 115-120m It is 92-101m. (3) The microseismic monitoring revealed that the fracture angle of the strata is about 52 ° in strike and 60 ° in dip.