摘要
为防治通化矿业(集团)公司八宝矿冲击地压的发生,对其可能发生冲击地压的-412区1号、-213区4号和6号煤层试样进行了力学性质与动态破坏特性的试验研究,并结合了冲击倾向性数值模拟研究,分析了矿区水平应力、垂直应力、最大主应力大小及分布规律,得出结论:(1)应力较大值多出现在地质构造复杂地带,凡遇褶曲和断层带,特别是断层上、下盘处,而且强度相对较大,即冲击倾向性相对较强。(2)水平应力约为自重应力的2倍,垂直应力约为自重应力的2.7倍,最大主应力略小于自重应力,最大应力值远远小于极限强度。(3)实验研究与数值模拟结论较好吻合,与通化八宝矿未发生冲击地压的实际一致。
To prevent the occurrence of rockburst in Tonghua-Babao Coal Mine,samples from its-412 district-1#,-213 district-4# and-213 district-6# coal layers,which were possible to rockburst,were tested for their mechanic properties and dynamic failure behaviors.Combining with burst tendency numerical simulations,the authors analyzed the size and the distribution of horizontal stress,vertical stress and major principal stress.The results for this research were as the following.First,the maximum stress appears in complex geological structure zone,always in folds and distributed faults.Specially,it was relatively strong in the hanging wall and the footwall,namely,a strong burst tendency.Second,the horizontal stress was about twice as the gravitational stress;the vertical stress was 2.7 times more than the gravitational stress;the major principal stress was slightly less than the gravitational stress;the maximal stress value was much less than the breaking point.Third,the experimental data agreed fairly well with the simulation results and were consistent with the fact that there was no rockburst at Babao in Tonghua Coal Mine.
出处
《中国地质灾害与防治学报》
CSCD
2010年第3期105-108,共4页
The Chinese Journal of Geological Hazard and Control
基金
国家重点基础研究发展规划项目(2010CB226803)
关键词
冲击地压
冲击倾向性
实验研究
数值模拟
通化
rockburst
burst tendency
experimental investigation
numerical simulation
Tonghua
