4.岩层位移测定试验坑内采空区顶板的位移变化规律对于了解采空区岩层的稳定状况是很重要的。为了掌握顶板及其上部各岩层的位移规律,我们采用了六点位移计和动态仪等手段进行测试。六点位移计设在将要进行开采的153水平701采场。该采场按设计要求采用房柱法开采,矿房宽12米,采高12米,斜长58米,间柱厚6米。地质条件与502采场近似,矿体较稳定,地质构造较简单。采用武汉岩土所研制的多点位移计。测孔位在采场中部,成 4. Measurement of displacement of rock The rule of displacement of the roof of goaf in the test pit is very important for understanding the stability of rock in the gob area. In order to grasp the roof and the upper part of the rock formation displacement, we used a six-point displacement meter and dynamic instruments and other means of testing. The six-point displacement is set at 153 horizontal 701 stopes to be mined. According to the design requirements of the stope mining method, mining area 12 meters wide, mining 12 meters high, inclined 58 meters long, 6 meters thick. The geological conditions are similar to 502 stope, the ore body is more stable and the geological structure is simpler. Multi-point displacement meter developed by Wuhan Rock and Soil Institute. Measure hole in the middle of the stope, into