Application of microseismic monitoring in the depth damage of floor in Xinji No.2 Mine
Chen Jiandong1,2
1. Hebei Coal Scientific Research Institute Corporation Ltd., Xingtai 054000, China; 2. Hebei Province Key
Laboratory of Mine Microseismic, Xingtai 054000, China
Abstract： In view of the depletion of coal resources in the shallow part of the North China coalfield, the mining gradually shifted to the lower Carboniferous coalbed, and the deep mining faced with high pressure and strong water-bearing layer in the coalbed, 230102 working face of Xinji No.2 Mine was taken as an example, and the microseismic monitoring technology was applied to the monitor the floor damage zone in the "lower three zones" of the floor. This paper compared empirical formulas, elastic-plastic mechanics methods combined with Mohr-Coulomb strength theory and field measurement data. The principle and calculation process of the various research methods were sorted out, highlighting the advantages of microseismic monitoring in monitoring the depth of floor damage, which can reflect the disturbance by the exposed (or hidden) structure during the recovery process in real time, exploring a more scientific method of monitoring the rock activity of the floor, and provide timely prediction for the water breakout of floor in mines.
