点荷载作用下岩石记忆效应试验研究  

Testing Study on Memorizing Effect of Rock under Point Loading

作　　者：金解放[1] 赵奎[1] 刘明松[1] 许振华[1] 

机构地区：[1]江西理工大学建筑与测绘工程学院,江西赣州市341000

出　　处：《矿业研究与开发》2008年第2期18-20,共3页Mining Research and Development

基　　金：国家自然科学基金(50464002);江西省教育厅科技计划项目(2005-151);江西理工大学校级课题

摘　　要：利用点荷载仪和应变仪,选择花岗岩和砂岩进行了分级循环加载试验,详细分析了试验过程中试件载荷、应变、泊松比及损伤因子与声发射间的变化规律,分别得到了不同循环加载阶段的各个参数与累计振铃计数的关系,并利用数理统计理论评判了各参数对先期最大值记忆的准确性和稳定性。结果表明,3个试件在点载荷作用下具有明显的记忆效应,参数载荷对先期最大值的记忆准确程度和稳定性好于其他参数。Graded cyclic loading test was made on granite and sandstone samples by point load tester and strain meter, and then the changing laws among load, strain, Poisson＇s ratio, damage factor and acoustic emission（AE） for the cyclic loading test on the samples were analyzed in detail, the relations between various parameters and accumulative AE counts on different level loading were obtained, on basis of the theory of statistics, the veracity and stability of different parameters to memorize their previous greatest value were estimated. The results showed that under point loading three rock samples had obvious memorizing effect, and load parameter was better than other parameters in the veracity and stability of memory.

关 键 词：岩石点荷载 记忆效应 岩石声发射 力学参数 

分 类 号：TD315[矿业工程—矿井建设]