Effect of water on dynamic mechanical properties of coal under different depth stress conditions  

水对不同深度应力条件下煤岩动态力学特性的影响

作　　者：LI Sheng-wei GAO Ming-zhong LI Ye-xue WANG Jun ZENG Gang 李圣伟;高明忠;李业学;王俊;曾刚(Hubei Key Laboratory of Vehicle-infrastructure Cooperation and Traffic Control,School of Civil Engineering and Architecture,Hubei University of Arts and Science,Xiangyang 441053,China;State Key Laboratory of Hydraulics and Mountain River Engineering,College of Water Resources and Hydropower,Sichuan University,Chengdu 610065,China;State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering,Shenzhen University,Shenzhen 518060,China;Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization,Institute of Deep Earth Sciences and Green Energy,College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,China)

机构地区：[1]Hubei Key Laboratory of Vehicle-infrastructure Cooperation and Traffic Control,School of Civil Engineering and Architecture,Hubei University of Arts and Science,Xiangyang 441053,China [2]State Key Laboratory of Hydraulics and Mountain River Engineering,College of Water Resources and Hydropower,Sichuan University,Chengdu 610065,China [3]State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering,Shenzhen University,Shenzhen 518060,China [4]Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization,Institute of Deep Earth Sciences and Green Energy,College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,China

出　　处：《Journal of Central South University》2025年第1期220-228,共9页中南大学学报(英文版)

基　　金：Projects(52225403,52074112)supported by the National Natural Science Foundation of China;Project(2022CFD009)supported by the Hubei Natural Science Foundation Innovation and Development Joint Fund Key Project,China;Project(SDGZK2423)supported by the State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering,China;Project(HJZKYBKT2024111)supported by the Xiangyang Federation of Social Sciences“Hanjiang Think Tank”Project,China;Project supported by the Hubei Superior and Distinctive Discipline Group of“New Energy Vehicle and Smart Transportation”,China。

摘　　要：Coal seam water injection in tunnels is an effective technical measure for preventing coal mine rock bursts.This study used the improved split Hopkinson pressure bar(SHPB)to apply three equal static stresses to water-saturated coal to simulate the initial stress environment of coal at different depths.Then,dynamic mechanical experiments were conducted on the saturated coal at different depths to investigate the effects of water saturation and depth on the coal samples’dynamic mechanical properties.Under uniaxial compression and without lateral compression,the strength of coal samples decreased to varying degrees in the saturated state;under different depth conditions,the dynamic strength of coal in the saturated state decreased compared with that in the natural state.However,compared with that at 0 m,the reduction in the strength of coal under the saturated condition at 200,400,600,and 800 m was significantly reduced.The findings of this study provide a basic theoretical foundation for the prevention and control of dynamic coal mine disasters.煤层注水是预防煤矿冲击地压的有效技术措施之一。本文采用改进的分离式霍普金森压杆装置,对饱和水状态下的煤岩施加三向相等的静态应力模拟不同深度煤岩的初始应力环境,然后开展不同深度饱和水状态下煤岩的动态力学实验,研究饱和水和深度对煤岩动态力学性质的影响。研究结果表明:在单轴无侧向压缩时,煤岩在饱和水状态下,动态压缩强度出现不同程度的降低;不同深度应力条件下煤岩在饱和水状态下相对于自然状态下的动态压缩强度有所减弱,但是与0 m时的差异性相比,200、400、600和800 m深度应力条件下煤岩在饱和水状态下动态压缩强度降低的幅度减少了很多。研究成果可为煤矿动力灾害的防治提供基础理论依据。

关 键 词：COAL mining depths water saturation SHPB dynamic compressive strength 

分 类 号：P61[天文地球—矿床学]