论文部分内容阅读
利用岩石破裂过程数值模拟软件RFPA对点荷载与单轴压缩下岩石破裂的全过程进行数值模拟,得到了两种不同加载方式下岩石破裂全过程力学特性和声发射特征。通过对比研究两种加载方式下载荷与加载步、声发射事件与加载步、声发射能量与加载步之间的关系,结果表明:岩石在弹性变形阶段的中后期,声发射事件与能量都在显著增加,接近峰值应力时,声发射进入相对平静的阶段;单轴压缩与点荷载两种不同加载方式下,岩石整个破坏过程的声发射规律与特征具有较好的一致性。
The whole process of rock burst under point load and uniaxial compression was numerically simulated by the rock burst numerical simulation software RFPA. The mechanical properties and acoustic emission characteristics of the whole rock failure under two different loading modes were obtained. By comparing the relationship between loading and loading steps, acoustic emission events and loading steps, acoustic emission energy and loading step under the two loading modes, the results show that the acoustic emission events and energies of the rock during the middle and late stage of elastic deformation are When the uniaxial compression and the point load are applied under two different loading modes, the acoustic emission law and characteristics of the entire rock failure process are in good agreement.