在矿山深部开采和大洞室开凿中,查明空洞周围的应力状态是一个重要课题。本文仅限于研究孔壁应变的应力解除法。介绍过去采用的方法并从理论上分析应力测量精度,同时,探讨通过孔底球面应变测量来确定地压的方法。新的测量方法从一个孔底测量即可高精度地确定岩体中的三维应力。通过一个钻孔中的多次测 In the deep mining of mines and excavation of large caverns, it is an important issue to identify the stress state around the cavity. This article is limited to study stress relief method of pore wall strain. The methods adopted in the past are introduced and the stress measurement accuracy is theoretically analyzed. Meanwhile, the method of determining the ground pressure by measuring the spherical bottom surface strain is discussed. The new measurement method can accurately determine the three-dimensional stress in a rock mass from a single hole bottom measurement. Pass multiple measurements in one borehole