Department of Mining and Design,Tiandi Science and Technology Company Limited Shenhua Xinjiang Energy Company Limited

为了确定新疆乌东煤矿近直立特厚煤层单翼工作面在上采下掘期间防止冲击地压危险发生的合理采掘相向安全距离,采用数值模拟、微震监测和现场实测的方法进行研究。基于数值模拟方法研究了上采下掘期间不同相向距离的应力演化规律和影响范围,根据微震监测和现场冲击地压案例分析了上采下掘与冲击地压危险关系。结果表明:上分层工作面与下分层掘进工作面相向的距离与煤体应力集中和微震事件发生频次呈正相关关系,该条件下上采下掘相向最小安全距离为100 m,上采下掘活动引起的煤体高应力集中和围岩剧烈活动是诱发下分层掘进工作面冲击地压显现的原因,通过采取及时停止下分层掘进的措施,成功地避开了掘进巷道冲击地压灾害,进而验证了分析结果。

in order to detemine the mine pressure bump danger and the rational mining and drving safetydistance during upper layer mining and lower layer excavation periodof the single coal mining face in the near vericalulra thick seam of injiang Wudong Maine ,a study vas conducted ith the numericalsfnulation,the microseismic monitoring and measuring and the sie pracices alysis method.Based on the numericalsinulation method.the studly was conduced on the stress evoludton law and infuence scope under the different same directionaldistance during upper layer mining and lower layer excavation perod of the coal mining face.Accoding o te case analysis on the micro seismic monitoring and measuring and the site pressure bump,a study was condiucted on the relationshtp betwen upr ayer ming andower layer excavation and the mine pressure bunp danger The resuts showed tat the same drecion distance between upper layer mining and lower layer excavationwas in a postive relationship to the seam stress concentration and the micro seismic accidents ocured. Under the coniton.the min safet distance of upperlayer mimng and lower layer excavation in a same direction was 100 m.The seam high stress concentration and the surrounding rock serious activties occured by upper layer mning and lower layer excavation operations was the cause to occur the mine pressure bunp behavior of the lower drvin fce. With the on time measure to stoa the lower layer excavation,the mine pressure bump disaster of the driving gateway could be successtilly avoided and the analysis results were verified.

国家自然科学基金资助项目(51304116)；天地科技开采设计事业部青年创新基金资助项目(KCSJ-QNCX-2014-09)；天地科技技术创新基金资助项目(KJ-2014-TDKC-12)；