急倾斜特厚煤层强矿压控制与效果评估

Strong Mine Pressure Control and Effect Evaluation of Steeply Inclined and Extra-thick Coal Seams

结合北采区工况条件,制定了强压控制方案,并通过对比分析实施前后微震事件和电磁辐射特征,对北采区设计的井下与地面多层次的强矿压控制方案实施效果进行评估。结果显示,方案实施后围岩发生微震事件的强度明显降低,次数明显减少,尤其是V级事件,虽然方案实施后事件频次仍高达7次,但总释放能量较小;工作面煤体电磁辐射强度明显降低;煤体内电磁辐射强度大幅下降。

Combining with the working conditions of the north mining area,this paper formulated a strong pressure control scheme,and evaluated the implementation effect of the underground and ground multi-level strong mine pressure control scheme designed for the north mining area by comparing and analyzing the microseismic events and electromagnetic radiation characteristics before and after the implementation.The results showed that the intensity of microseismic events in surrounding rocks decreased significantly after the implementation of the scheme,especially the V-level events.Although the frequency of events was still as high as 7 times after the implementation of the scheme,the total released energy was relatively small;the electromagnetic radiation intensity of coal body in working face decreased significantly;the electromagnetic radiation intensity in coal body decreased significantly.