煤矿应力异常集中区强矿压防治研究

根据木城涧煤矿三槽西五壁工作面的生产地质条件，采用FLAC^3D三维数值模拟软件，分析了工作面开采过程中的垂直应力，特别是超前支承压力的分布规律，以此划分了应力异常集中区，强矿压危险区域为工作面轨道顺槽前方不规则煤柱的尖角处，垂直应力集中系数达到2.75。利用电磁辐射对上述危险区域进行重点监测，对超过临界预警值的区域，及时采取煤体卸压爆破进行强矿压危险性的卸压解危，并利用电磁辐射检验卸压效果，直至监测指标降至临界值以下，最终确保了工作面的安全生产。

Strong Rock Presure Prevention of Abnormal Stress Concentration Region in Coal Mine

According to the production and geological conditions of No.3 seam West 5 working face in Muchengjian coal mine,the vertical stress distribution in the process of mining was analyzed using FLAC3D.Especially the advanced abutment pressure distribution law was analysis in detail,and the abnormal stress concentration region located a sharp corner of irregular coal pillar in front of working face tailgate,which vertical stress concentration factor is 2.75.Rockburst danger in abnormal stress concentration was monitored by electromagnetic emission(EME),when the monitoring EME intensity value was bigger than the critical warning value 100mV,the coal materials relieve-shots were measured timely for weakening rockburst danger.Meanwhile,EME was used to check the effect until the monitoring index value was lower than the critical value.Finally,the safe production of working face was ensured.