利用岩石声发射效应测定海孜煤矿地应力

Measurement of in-situ stresses with acoustic emission effect in Haizi coal mine

对海孜矿区宏观地应力进行了理论分析,介绍岩石声发射技术进行地应力测试的基本原理和方法。通过对海孜矿区井田内9个特殊方向定向岩心取样,进行声发射试验,得到了各方向的单向正应力值,各测点的主应力值均为压应力,说明海孜矿区为构造应力场型;再利用地应力计算公式求出3个主应力的大小和方向。试验结果与实际结果基本吻合。

Theoretical analysis on macro stress of Haizi coal mine, the principle and method for measuring initial stresses in rock using acoustic emission effect are described. Through sampling in 9 special directions on the beamed rock cores in Haizi coal mine and doing acoustic emission experiment, the unilateral plus stress values on each direction are obtained. The principle stress value at every measurement point is compressive stress value. It is suggested that the Haizi coal mine is in structural stress field. And then the data are introduced into the crustal stress calculating formula, and then the values, azimuth angle and obliquity of the three principal stresses are obtained. The experiment result is in accordance with actual situation.