Hebei Coal Research Institute CO., LTD.，Xingtai 054000， China
Hebei Mine Microseism Key Laboratory,
ingtai 054000， China

煤矿回采过程中，由于工作面巷道布置、地质条件等因素的影响，不规则工作面出现的情况逐渐增多。不规则工作面回采过程中应力场变化不同于规则工作面，其微震时空演化规律也不同。本文结合梧桐庄矿182300工作面微震监测数据，分析不规则工作面频次、能量等随时间推进其发育特征，以及空间分布演化规律。研究结果表明，随着工作面倾向长度变化，微震事件频次会呈现正相关变化。工作面倾向长度一直在增大，微震事件数量持续处于高位；随着回采推进，工作面倾向长度变化幅度变小，微震事件频次有所降低。微震事件发育受回采扰动明显，停采后微震事件频次明显降低。回采期间小能量事件频次最多，占比最大，为58.87%，大能量事件个数最少，说明回采期间岩体破裂尺度微小，未向深部、大尺度扩展延伸。

In the process of coal mining, due to the influence of working face roadway layout, geological conditions and other factors, the occurrence of irregular working face is gradually increasing. The variation of stress field in irregular working face is different from that in regular working face, and the temporal and spatial evolution law of microseism is also different. Based on the microseismic monitoring data of No.182300 Face in Wutongzhuang Mine, the frequency and energy development characteristics of irregular working face, as well as the spatial distribution evolution rule, were analyzed over time. The main conclusions were as follows: with the change of working face dip length, the frequency of microseismic events would show a positive correlation change. The inclined length of the working face was increasing and the number of microseismic events was at a high level. With the advance of mining, the variation range of working face inclined length became smaller, and the frequency of microseismic events decreased. The development of microseismic events was obviously disturbed by mining, and the frequency of microseismic events decreased obviously after stoping. During mining, the frequency of small energy events was the largest, accounting for 58.87%, while the number of large energy events was the least, which indicated that the rock mass fracture scale was small during mining, and did not extend to the deep and large scale.

周金艳1，2. 不规则工作面微震时空演化规律研究[J]. 煤炭与化工, 2023, 46(8): 57-60，66..

Zhou Jinyan1,2. Study on temporal and spatial evolution law of microseism in irregular working face. CCI, 2023, 46(8): 57-60，66..