高水压高应力岩石应力波传播试验装置及初步试验  

Experimental Device and Preliminary Test for Stress Wave Propagation in High Water Pressure and High Stress Rocks

作　　者：金解放[1] 熊慧颖 胡玮锋 肖莜丰 Jin Jiefang;Xiong Huiying;Hu Weifeng;Xiao Youfeng(School of Civil and Surveying&Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou,Jiangxi 341000,P.R.China;Guang Dong Tianxin Electric Power Engineering Test Co.,Ltd.,Guangzhou 510663,P.R.China)

机构地区：[1]江西理工大学土木与测绘工程学院,江西赣州341000 [2]广东天信电力工程检测有限公司,广州510663

出　　处：《地下空间与工程学报》2024年第S2期701-712,共12页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金(52174112,51964015);江西省自然科学基金(20232ACB204015)。

摘　　要：深部高水压岩体工程爆破开挖时,围岩体承受高水压、高地应力和爆破动载荷共同作用。由于缺乏具有高水压和高地应力功能的岩石动力学试验方法和试验系统,其理论研究远落后于工程实践。在分析简化深部高水压工程岩体受力的基础上,提出高水压高应力岩石应力波传播试验方法并研制出试验系统,该试验系统由高水压加载装置和改进的SHPB试验系统组成,高水压加载装置为岩石提供高静水压力,改进的SHPB试验系统提供轴向静应力和应力波动力源。高水压加载装置由密封腔、端盖、压盖、密封圈及水压泵组成,并实现了轴向和径向高压水密封等关键技术。通过高水压高应力岩石应力波传播试验,验证了高水压高应力岩石应力波传播试验系统的可行性,得到高水压岩石应力波传播衰减特性的初步研究结果。结果表明,高水压加载装置密封性能良好,能较好地模拟深部岩体工程中的高水压、高地应力和动载荷,高水压装置对弹性杆中的一维应力波传播没有影响,可以开展岩石应力波传播试验研究。对于损伤程度较小的岩石,水压的增大有助于提高岩石的波阻抗。当红砂岩承受的轴向静应力较小时,随着水压力的增加,岩石应力波传播速度和透射系数逐渐增加。During blasting excavation of deep high water pressure rock mass engineering,the surrounding rock mass is subjected to the combined effects of high water pressure,high ground stress and blasting dynamic load.Due to the lack of dynamic test methods and test systems for rocks under high hydraulic pressure and high ground stress,its theoretical research lags far behind engineering practice.Based on the analysis of simplified stresses in deep high hydraulic pressure engineering rocks,a test method for stress wave propagation in high hydraulic pressure and high stress rocks is proposed and a test system is developed,which consists of a high hydraulic pressure loading device and an improved SHPB test system,with the high hydraulic pressure loading device providing high hydrostatic pressure for the rocks and the improved SHPB test system providing axial static stress and a stress wave power source.The high hydrostatic loading device consists of sealing chamber,end cap,gland,seal ring and hydrostatic pump,and achieves key technologies such as axial and radial high pressure water sealing.The feasibility of the high water pressure and high ground stress rock stress wave propagation tests system was verified through high water pressure high ground stress rock stress wave propagation test,and the preliminary research results of the high water pressure rock stress wave propagation attenuation characteristics were obtained.The results show that the high water pressure loading device has good sealing performance and can better simulate the high water pressure,high ground stress and dynamic load in deep rock engineering,and the high water pressure device has no effect on the one-dimensional stress wave propagation in the elastic rod,so the rock stress wave propagation test study can be conducted.When the red sandstone is subjected to a small axial static stress,the rock stress wave propagation velocity and transmission coefficient gradually increase with the increase of water pressure.The reason is that for rocks with less damag

关 键 词：深部岩石力学 高水压 高地应力 应力波传播 试验装置 

分 类 号：TU458[建筑科学—岩土工程]