本文采用空芯包体方法地应力测量表明吕家坨井田是水平应力场，测量结果为矿井采场合理布局、巷道布置选择和锚杆支护设计提供基础数据。
The principle and characteristics of stress measurement with the CSIRO method and the main procedures of in situ stress measurement carried in 4 coal mines of Xingtai mining area are introduced.
应力场的分析表明，劈理构造由近南北向的地壳水平挤压应力作用形成。
The stress field analysis showed that the cleavages formed under horizontal, S-N trending compressive stress.
本文根据弹塑性理论基本方程，导出了高水平均匀残余应力场由于钻孔引起的松弛应变与残余应力的关系公式。
When a high level isotropic stress field is disturbed by a drilled hole, a relation of relieved strain vs. residual stress is derived by the basic equations of elastoplastic theory.
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