生产爆破下巷道顶板稳定性的动态应力比分析评价  

Analysis and evaluation of dynamic stress ratio for tunnel roof 's stability under production blasting

作　　者：陈国芳[1] 王瀚霆[1] 周盼[1] 尹丽冰 

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州341000

出　　处：《有色金属科学与工程》2015年第3期83-87,共5页Nonferrous Metals Science and Engineering

基　　金：江西省研究生创新基金项目(YC2013-S185)

摘　　要：为了研究某矿井下中深孔生产爆破对临近巷道顶板稳定性的影响,利用Blastmate III型测震仪对该矿山日常生产爆破时,对巷道顶板进行爆破振动现场测试.结果表明,爆破振动的振幅与频率随着测点到爆源距离的增加逐渐降低;在对测试结果分析的基础上,利用动态应力比评价方法对所研究巷道的顶板稳定性进行稳定性计算分析,得到DSR≤0.125,以相同条件进行爆破生产时,所研究巷道顶板无损伤破坏.Blasting vibration field tests are performed on the tunnel roof under daily production blasting by Blastmate III to investigate the effect of middle-deep hole explosion on the roofing stability. The result indicates that blasting amplitude and frequency gradually decrease with increasing distance between test point and explosion source. Dynamic stress ratio is applied to analyze the roofing stability based on analyzing the testing results.（DSR ≤0.125）. The results indicate that there is no roofing damage or breakdown under the same explosive conditions.

关 键 词：爆破振动 巷道顶板 稳定性 动态应力比 

分 类 号：TD322[矿业工程—矿井建设]