School of Resources and Safety Engineering.China University of Mining and Technology (Beijing)Yuwu CoalIndustry Company Limited,Lu'an mining (Group) Co.Ltp. Henan Provincial Collaborative Innovation Center of CoalSafety and Production Henan Provincial Key Lab of Gas Geology and Gas Control - Cultivation Base of Provincial and Ministry Joint Key Lab,Henan Polytechnic University School of Safety Science and Engineering.Henan Polytechnic University

为了研究综放开采"滞后型"动力灾害的演化机理及其防治措施,采用理论分析的方法从煤柱侧向应力、采场支承应力和复合顶板应力三方面对滞后型动力灾害演化机制进行分析,并采用FLAC3D数值模拟软件对理论分析结果进行模拟验证。结果表明:采空区后方应力增高区的高应力是主要力源因素;煤柱留设不当,造成侧向支撑压力叠加是主要原因;复合顶板失稳断裂产生的冲击压力,通过保护煤柱的传递作用于煤层底板。结合数值模拟结果和现场实践,按研究工作面动力危险程度将其划分为:冲击显现区、一般冲击危险区和强冲击危险区;采用煤层注水、超前端头预裂爆破和煤柱大孔径卸压3种动力灾害防治措施,有效地降低了该工作面动力灾害事故的发生。

in order to study evolution mechanism and prevention measures of a delay-ype dynanmic disaster in rlly-mechanized top cal caving mining from side stress of coa pllarthe supot tress of coal minin face and complex roof stress aspects a theoretical analysis methnod iwas applied to an aysis on the evolution mechansm of delay- type dynanic disaster and a FLAC3 Dnumercal sirulaton software was aplid to sirulation verfcation of thecreical anlysis results he resuts showed that the high stress in stress increased zone in rean of the goaf was the factor of major power sources.The coal illalet improperly would be major cause tomake side support pressure overlied.The bump pressure occurred by the unstability and breaking of the complex roof would pass to the seam floor by transmission role of the prolective coal ia./n combination with numercalsimulato resuts and the ste practces.,ased on dynani: danger degree,the coal mining faceof stidly was divided into a bump appeared zone,a general bump danger zone and high bunp danger zone. With three dynanic disaster prevention and control measures of seam water injection.,pre-spliting blasting in th plot face end and coa pilla lage dianeter borehole pressure released .dynanmic disaser acident ocured in the coal mining fce was fectively reduced.

国家自然科学基金资助项目(U1304502)；教育部博士点基金资助项目(20134116120001)；河南理工大学博士基金资助项目(B2011-011)；