褶皱区应力场分布规律及其对冲击矿压的影响  

The Stress Field Distribution in Folding Structure Areas and Its Impaction on Rock Burst

作　　者：陈国祥[1] 窦林名[1] 乔中栋 陆菜平[1] 巩思园[1] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221008 [2]甘肃华亭煤电公司砚北煤矿,甘肃华亭744100

出　　处：《中国矿业大学学报》2008年第6期751-755,共5页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50490273,50474068);“十一五”国家科技支撑计划(2006BAK04B02,2006BAK03B06);国家重点基础研究发展计划(973)项目(2005CB221504)

摘　　要：为探讨褶皱构造区应力场分布规律及其对冲击矿压的影响,采用FLAC2D数值模拟程序,研究了褶皱构造形成过程中的应力分布规律和工作面开采导致的局部应力场变化规律.结果表明,褶皱形成后,褶皱核部的最大水平应力比翼部大,翼部的最大水平应力比背斜处大,褶皱构造区具有初始地应力场分布的非均匀性;与仰采推进相比较,从背斜往向斜的方向俯采推进时,煤岩体内应力集中程度更高,褶皱区具有开采后局部地应力场变化的方向性.褶皱向斜部分是水平应力集中区,采掘时冲击危险性较高,而翼部、背斜处的冲击危险性次之;褶皱区工作面最有利的推进方向应是自向斜起往背斜方向推进.In order to discuss the relation between rock burst and stress field in folding structure areas, the law of stress distribution during the form of folding structure and the changing law of local stress area induced by mining were studied by FLAC2D. The results show that the largest horizontal stress of the axis of folding structure is higher than that of sides after the forming of the folding structure. The largest horizontal stress of the sides is higher than that of anticline, and the folding structure areas take on non-uniformity of the original stress distribution. The convergence of stress is higher when advancing downhill from anticline to syncline compared with rising advance, and the folding structure areas take on directivity of the chan- ging local stress after being mined. Syncline of folding structure is the area of the higher stress and more hazard of rock burst compared with the sides and anticline of folding structure when being mined. The most beneficial direction of mining coal face should advance from syncline to anticline.

关 键 词：褶皱构造 应力场分布 非均匀性 方向性 冲击矿压 

分 类 号：TD324[矿业工程—矿井建设]