基于冬瓜山铜矿深部开采面临的高应力集中及爆破扰动的问题，采用改进的SHPB岩石动静组合加载试验系统，进行了含铜蛇纹岩在一维静载与频繁扰动共同作用下的动力学试验，研究其动力学特性。研究结果表明：预加轴压促使岩石内部微裂纹完全闭合时，岩石动态应力-应变曲线初始阶段不出现下凹现象，否则出现；岩石内部存储的弹性力大于扰动冲击应力时，岩石动态应力-应变曲线峰值应力后会出现回弹现象，否则不出现；动态峰值应力、动态变形模量随扰动冲击次数的增大而减小，60%单轴抗压强度的轴压时峰值应力最大；峰值应力均值随轴压的增大先增大后减小；最大应变、峰值应力对应应变随扰动冲击次数的增大而增大；累计扰动冲击次数最大值与均值都随轴压增大呈一元四阶多项式关系递减。
The dynamic experiment of copper-bearing serpentine under one- dimensional static load and frequent disturbance is been tested to study the mechanical properties of copper-bearing serpentine, which is carried out in the improved SHPB test system of the rock coupled static and dynamic loads for the questions of high stress concentration and blasting disturbance with deep exploitation in Dongguashan Copper Mine. The results show that a phenomenon of concave do not appeared in the initial stage of dynamic stress-strain curve when the pre axial compression promote the rock’s internal micro fracture complete closed, while not. When the rock’s internal stored elastic force is greater than the frequent disturbance, the rebound phenomenon appear after the dynamic stress reaches peak stress, otherwise do not appear. With the disturbance impact times increasing, dynamic peak stress and deformation modulus decrease while maximum strain and the strain corresponding to the peak stress increase. The results also shows that the stress is maximum when the axial compression is sixty percent of the uniaxial compressive strength. With the axial load increasing, the average value of dynamic peak stress increases first and then decreases. The maximum and average cumulative disturbance impact times decrease expressing a fourth order polynomial relations.
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