钻孔冲击试验的数值模拟  

Numerical Simulation on Borehole burst experiment

作　　者：陈学华[1] 张宝安 李伟清[3] 

机构地区：[1]辽宁工程技术大学资源与环境工程学院,辽宁阜新123000 [2]阜新矿务局王营子矿,辽宁阜新123012 [3]兖州煤业股份有限公司东滩煤矿,山东邹城273512

出　　处：《辽宁工程技术大学学报（自然科学版）》2003年第B08期28-29,共2页Journal of Liaoning Technical University (Natural Science)

摘　　要：通过对钻孔冲击试验方法的介绍,以及对钻孔冲击试验结果的分析,证明存在一个临界压力,可作为发生冲击地压的应力条件的判据。用RFPA软件对煤样钻孔冲击进行了数值模拟研究,验证了钻孔冲击试验得出的临界压力。随着施加在煤样上的载荷增加,钻孔冲击次数显著增多,冲击强度增大。在临界压力附近,钻孔冲击前后的应力降及声发射急剧增加。The borehole burst experiment is introduced. By analyzing the results of borehole burst experiment, the critical pressure is put forward, which can be used as the stress condition of rock burst. The software RFPA is used to simulate the borehole burst, and to validate the critical pressure. Along with the load increasing that acts on the coal sample, the burst frequency obviously rise and the burst intension also rise. The stress drop and acoustic emission change sharply before and after the burst in the borehole.

关 键 词：钻孔冲击试验 数值模拟 冲击地压 临界压力 冲击强度 应力降 

分 类 号：TD324[矿业工程—矿井建设] TD315.3