基于三向应力监测装置的地应力测量方法研究  

Research on in-situ stress measurement method based on three-dimensional stress monitoring device

作　　者：沈荣喜[1,2] 侯振海 王恩元[1,2] 孙英豪[1,2] 杨瑞鹏 韩旭 李红儒 欧建春[3] SHEN Rongxi;HOU Zhenhai;WANG Enyuan;SUN Yinghao;YANG Ruipeng;HAN Xu;LI Hongru;OU Jianchun(Key Laboratory of Gas and Fire Control for Coal Mines Ministry of Education,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;School of Safety Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;State Key Laboratory of Coal Resources and Safe Ming,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室,江苏徐州221116 [2]中国矿业大学安全工程学院,江苏徐州221116 [3]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州

出　　处：《岩石力学与工程学报》2019年第S02期3618-3624,共7页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(51574231,51104156);江苏省基础研究计划(自然科学基金)青年基金项目(BK20160273)。

摘　　要：地应力的大小和方向决定着地下煤岩体的形变及稳定性,研究地应力实时测量技术对于煤岩动力灾害监测具有重要意义。基于此,研发基于静水压原理的三向应力传感装置,对该装置的应力传感性能进行测试分析,并分析了三维地应力解算公式;在平顶山首山煤矿安装两套应力传感器,测量并求解测点的三维地应力大小及方向。研究结果表明:装置感应应力与实际加载应力呈线性对应关系,相关系数R=0.98957,并且三向应力感应相互独立;首山一矿最大主应力为22.86 MPa,方位角为140°,倾角2°,地应力以水平应力为主,侧压系数为1.22,属于典型的构造应力场,实测结果与前人研究结果相吻合。研究表明该装置和方法能够较为准确的测量地应力大小及方向,测量方法简单便捷,具有工程应用前景。The size and direction of ground stress determine the deformation and stability of underground coal-rock mass.Therefore,it is of great significance to study the real-time ground stress measurement technology for monitoring coal-rock dynamic disasters.In this study,a three-dimensional stress sensing device based on the principle of hydrostatic pressure was developed,and its stress sensing performance was tested and analyzed.Meanwhile,the solution formula of three-dimensional ground stress was analyzed.In addition,the size and direction of three-dimensional stress of Shoushan No.1 Coal Mine were measured and calculated by installing two sets of stress sensors.The results show that the stress sensed by the device is linearly related to the actual load stress,with a correlation coefficient of 0.98957,the sensing spring plates of three-dimensional stress are mutually independent.The maximum principal stress of the mine is 22.86 MPa,the azimuth is 140°,and the dip angle is 2°,the ground stress is dominated by horizontal stress,the side pressure coefficient is 1.22.It was a typical tectonic stress field.The test results agree with the results of previous studies.The results show that the three-dimensional stress sensing device and method proposed in this study are not only simple and easy to operate,but also able to accurately measure the size and direction of ground stress.They have bright prospect in engineering applications.

关 键 词：采矿工程 三向应力 实验 地应力 主应力 侧压系数 

分 类 号：TD32[矿业工程—矿井建设]