段建华

• 1:中煤科工集团西安研究院有限公司

摘要(Abstract)：

华北煤田西部鄂尔多斯侏罗系煤田顶板水害严重,而其导水裂缝带高度是评价顶板水害程度的关键水文地质参数,因此准确测定导水裂隙带发育高度是顶板水害防治的关键技术。井-地-孔联合微震监测技术具有实时、连续、动态、长期监测的优点,可以在地面、井下和孔中等位置布置传感器,形成对测区的全方位监测,具有比传统微震监测技术更高的定位精度,尤其是垂直方向的定位精度更高,能够满足防治水的要求。以布尔台煤矿42202工作面为例,在地面和井下巷道同时布置传感器,构建了井-地联合微震监测系统,对工作面回采过程中顶板裂隙发育高度进行实时监测,监测结果表明:42202工作面回采时顶板岩层破裂产生的地震波能够顺利穿越上组煤采空区到达地面,被仪器接收。此次监测回采工作面长800m,工作面回采过程中顶板裂隙发育高度为150～160 m,其测量结果与钻孔实测法获得的结果一致,而且工作面靠近未采区域侧的顶板裂隙比靠近采空区侧的更发育。研究表明利用井-地联合微震监测技术可以对工作面回采过程中顶板裂隙发育高度进行实时、高精度监测,对于顶板水害防治具有重要意义和实用价值。

关键词(KeyWords)： 顶板水害;井-地-孔联合微震监测技术;钻孔实测

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划课题(2017YFC0804103);; 中煤科工集团有限公司科技创新基金项目(2017MS007)资助项目

作者(Author): 段建华

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