深井综放工作面回采速度对矿震致灾的影响性研究Impact of the mining speed of the deep mine fully-mechanized working face on the mining quake disasters
闫宪磊
摘要(Abstract)：
以从波兰引进的SOS微震监测系统为依托,对兖矿集团东滩煤矿深井大采高特殊开采条件下的1305综放工作面在回采期间的微震活动进行全时连续监测,并统计分析了1305综放工作面开采期间的微震活动发生次数和能量释放变化规律。结果表明:东滩煤矿深部1305综放工作面微震事件以低能量的释放为主,低能量微震活动有为强震积蓄能量的趋势;低能量矿震的次数、能量与开采速度呈近似线性正相关,而高能量矿震与开采速度呈非线性关系;开采速度的增大会增加矿震的次数和能量,致使震动总能量由低能量向高能量移动,动力灾害危险性增加;开采速度的稳定性对工作面围岩的应力分布有很大影响,同样开采强度下,匀速开采较非匀速开采的应力集中系数小,煤岩体储存的弹性能小,表现为微震的次数和能量都较低。研究表明,控制开采速度可以控制低能量矿震的发生次数和释放能量,慢速均匀开采能有效减少矿震发生次数。
关键词(KeyWords)： 采矿工程;矿震;开采速度;微震监测系统;数值模拟
基金项目(Foundation):
作者(Author): 闫宪磊
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