Hebei Coal Research Institute Co., Ltd.，Xingtai 054000， China；Key Laboratory of Mine Water Disaster Detection and Prevention and Control, Xingtai 054000， China；Hebei Key Laboratory of Mine Microseismicity, Xingtai 054000， China

采用KJ1073微震监测系统对新集二矿220102工作面不同采宽变化下顶底板围岩活动和底板破坏发育情况进行监测，分析了微震事件分布范围、发育情况及空间展布特征。结果表明，微震事件主要分布在开采活动范围内，影响范围为距离机巷90～180 m，底板事件破坏深度为煤底18.11～36.64 m，最深36.64 m，位于宽面，采宽比1.59，微震事件日均频次比1.40，底板最大扰动深度比1.38，说明了底板破坏深度受采宽影响，且正相关。研究结果可为工作面采宽优化和底板破坏规律研究提供一定参考。

KJ1073 microseismic monitoring system was used to monitor the roof and floor surrounding rock activity and floor failure development under different mining width changes in No.220102 Face of Xinji No.2 Mine. And the distribution range, development and spatial distribution characteristics of microseismic events were analyzed. The results showed that the microseismic events were mainly distributed in the range of mining activities, and the influence range was 90-180 m from the machine roadway. The floor event failure depth was 18.11-36.64 m, and the deepest was 36.64 m, which was located in the wide surface. The mining width ratio was 1.59, the daily average frequency ratio of microseismic events was 1.40, and the maximum disturbance depth ratio of the floor was 1.38, which indicated that the floor failure depth was affected by the mining width and was positively correlated. The research results could provide some reference for the optimization of working face mining width and the study of floor failure law.

高杰涛1，2，3. 工作面不同采宽与微震监测时空分布规律研究[J]. 煤炭与化工, 2024, 47(3): 47-51.

Gao Jietao 1,2,3. Study on different mining width and microseismic monitoring temporal and spatial distribution law in working face. CCI, 2024, 47(3): 47-51.