Application of microseismic monitoring technology on fully mechanized top-coal caving face of extra-thick coal seam

Microseismic monitoring technology was used on fully mechanized coal caving face of extra-thick coal seams in Tashan coal mine to study the movement law of the surrounding rock mass in order to provide a scientific basis for the coal mining design and the mining pressure control. According to the practical situation of the fully mechanized top-coal caving face, the arrangement principles of survey area was determined and all the data was collected and researched on the basis of requirements of the high-precision microseismic monitoring technique. The movement parameters of the surrounding rock mass on the coal caving face, which have practical value for the safety in mining, are given in the end of this paper.