The <i>In Situ</i> Stress Measurement Technology Research of Km Deep Well and Support Effect Evaluation

Abstract

In order to obtain the characteristics of in-situ stress distribution in ZhuJixi coal mine areas, and provide the powerful basis for the design of the roadway, the typical roadway of Zhujixi coal mine was measured by the hollow inclusion method. The measurement results showed that the maximum and minimum principal stress in the mining area were for nearly horizontal direction, and the intermediate principal stress was for nearly vertical direction; The maximum ratio of the stress was 1.55 by comparing vertical principal stress and the maximal horizontal principal stress, so the mining area was for the high stress area; Through estimating depth of about 950 m of the horizontal and vertical stress, could know the theory results were basically smaller than test results by comparing with the field test results, this showed that the area was given priority to with horizontal tectonic stress, belonged to the Earth dynamical field type. We used the test results to evaluate the supporting effect of the roadway by the theoretical analysis, numerical simulation method.