大同矿区地应力测量及其与地质构造的关系

Measurement of in-situ stress and relationship between the stress and geologic structure in Datong mining area,China

为了研究大同矿区在煤炭开采过程中煤和瓦斯突出形成的冲击地压、采矿工程围岩破坏等动力灾害的形成原因及其防治对策,采用改进型CSIRO空心包体应变计,对大同矿区进行了四个测点的应力解除测量实验以及室内温度标定和围压率定实验.根据实验结果,利用地应力计算机程序优化求解出每个测点地应力张量,再结合矿区地质构造分析地应力与矿区地质构造的关系.通过研究,获得了大同矿区的地应力分布规律及其与地质构造的关系.

In order to study the reasons and preventive measures of dynamic disasters such as shock bump and the destroy of rock mass in mining engineering resulted from the outburst of mash gas and coal during mining, stress-relieving measurement and temperature and confining pressure calibration were made with improved CSIRO cells at 4 measurement points in Datong mining area. Based on the measured results the in-situ stress tensor of each point was computed by a special computer optimization program, and the relationship between in-situ stress and geological structure was analyzed with the geological structure factors of the mining area. The rules of in-situ stress distribution and the relationships between in-situ stress and geologic structure in Datong mining area were obtained.