压缩实验煤岩孔隙率变化规律研究  

Change law study on porosity of the coal and rock in compression test

作　　者：秦跃平[1] 王丽[1] 李贝贝[1] 崔丽洁[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《矿业工程研究》2010年第1期1-3,共3页Mineral Engineering Research

基　　金：国家自然科学基金资助项目(50674091);国家"973"计划资助项目(200CB221502)

摘　　要：为了更好的了解受载煤岩体的变形损伤规律,进一步揭示煤岩动力灾害演化过程及灾害发生机理,采用MTS815.02S型电液伺服岩石力学试验系统对煤岩试样进行单轴压缩实验,对应力应变曲线进行了分析研究,考察孔隙率与轴向应力的关系,探讨了压缩条件下孔隙率的变化规律及其原因.研究表明,煤岩试样初始阶段的非线性变形主要是材料内部的空隙、裂隙的变形引起的,得出压缩条件下孔隙率的求解方程,随着载荷的增加,孔隙率呈现先减少后变大的趋势.In order to better understand the law of deformation-damage under the load and further reveal the dynamic disasters evolution of coal and rock and disaster mechanism, the paper did uniaxial compression test of coal and rock using electw-hydranlie rock mechanics test system of MTS815.02S. It analyzed the stress-strain curves and the relationship between porosity and axial stress and probed into the evolution and the reason that porosity varied under the compression. The study showed that the nonlinear deformation of the initial stage of coal and rock was mainly the cause of gaps and fissures. The porosity equation under the compression was deduced and with the load increasing, porosity presented the first reduction in the trend of larger.

关 键 词：煤岩 孔隙率 轴向应力 非线性 

分 类 号：TD315[矿业工程—矿井建设]