复杂条件下上覆采空区积水综合防治技术

    Comprehensive Prevention and Control Technology for Overlying Goaf Water Under Complex Conditions

    • 摘要: 大同矿区赋存侏罗系和石炭二叠系2套含煤建造,上部侏罗系煤层开采年代久远,资源已近枯竭,在采空区低洼处汇集大量积水,严重威胁着下部石炭二叠系煤层开采。同忻煤矿根据覆岩破坏理论的经验公式,计算出了工作面开采“三带”高度,通过钻孔窥视和离层监测等技术手段对“三带”高度进行了验证和修正,结合矿井水文地质情况,分析评价了采空区突水危险性。提出并应用综合探测与立体防治技术,疏放采空区积水720万m3,保证了矿井安全开采。

       

      Abstract: Datong Mining Area has two coal-bearing formations that are Jurassic system and Permo-Carboniferous system, and the upper Jurassic coal seam was mined a long time ago and the resources are nearly exhausted. A large number of water is accumulated in low-lying goaf, which caused serious threat to the mining of the lower part of Permo-Carboniferous coal seam. According to the empirical formula of overburden rock damage theory, we calculate the working face mining height of "three zones". The height of the "three zones" was verified and modified by technical means of drilling peep and separation monitoring; combined with hydrogeololgy conditions of Tongxin Mine, we analyze and evaluate the risk of goaf water inrush. We propose and use the comprehensive detection and three-dimensional prevention technology to drain goaf water of 7.2 million m3, which ensures the safety of mine exploitation.

       

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