关键词: 微震监测, 地面台站, 震源高度, 定位精度

Abstract: The hypocenter height is one of the key parameters of microseismic monitoring in coal mine, which is of great significance in the monitoring of rock burst and mine earthquake and roof fracture law. However, all the microseismic monitoring stations are located in the same horizontal plane for the near horizontal coal seam, the hypocenter height error is large, which can not meet the requirements of the monitoring. In this paper, from the perspective of source solving partial differential derivatives, the mechanism of large error in hypocenter height of horizontal coal seam is analyzed theoretically, and then the concept and implementation method of microseismic joint monitoring technology of the surface-underground are proposed based on the above problems. The layered wave velocity model of ground station is studied, and the best P-wave velocity is obtained by the inversion of the blasting event. Finally, through the analysis of the microseismic joint monitoring data of Menkeqing Coalmine and Dahaize Coalmine, it is proved that the microseismic joint monitoring technology of the surface-underground has a good improvement effect on the error of the hypocenter height.

Key words: microseismic monitoring, surfer station, hypocenter height, location accuracy.