上覆不明采空区突水危险性分析及积水范围探测

发布时间：2018-05-15 05:22

  本文选题：不明积水 + 采空区突水　； 参考：《煤炭科学技术》2017年08期

【摘要】：针对整合矿井上覆不明采空区工作面易发生老空水害的工程难题,以重组整合矿井胜利煤矿太原组10号煤层开采为例,运用力学模型分析、经验公式计算以及数值模拟方法,综合分析研究了10号煤层及上覆6号、2号煤层开采后的导水裂隙带高度、底板破坏带深度情况。研究结果表明:10号煤层及上覆6、2号煤层开采后的最大导水裂隙带高度分别是54.94、30.49、33.67 m,最大底板破坏带深度分别是12.24、3.12、1.25 m,基于其相对空间位置,判断出2号煤层采空区积水不会影响10号煤层开采,而6号煤层采空区积水会直接进入10号煤层,对10号煤层安全生产造成重大影响;利用调查资料、地面物探、井下物探相结合的方法对6号煤层不明采空区积水范围进行了精准确定,为后续钻探放水提供了依据,为相似工程条件下上覆采空区突水危险性分析及积水范围探测提供借鉴。
[Abstract]:In view of the engineering problem that the workface of overlying and unknown goaf of integrated mine is prone to old goaf water hazard, taking the mining of No. 10 coal seam of Taiyuan formation in Shengli coal mine as an example, the mechanical model analysis, empirical formula calculation and numerical simulation method are used. The height of water conduction fracture zone and the depth of floor failure zone after mining in No. 10 seam and No. 6 and No. 2 coal seams are comprehensively analyzed and studied. The results show that the maximum fracture zone height of No. 10 coal seam and coal seam No. 6 and coal seam No. 2 after mining is 54.94 ~ 30.49 ~ 33.67 m, respectively, and the depth of maximum floor failure zone is 12.24 ~ 3.121.25 m, which is based on its relative spatial position. It is concluded that the water in goaf of No. 2 coal seam will not affect the mining of No. 10 coal seam, while the water in goaf of No. 6 coal seam will enter coal seam 10 directly, which will have a significant impact on the safety production of coal seam No. 10. The method combined with geophysical exploration can accurately determine the range of water accumulation in unknown goaf of No. 6 coal seam, which provides the basis for subsequent drilling and releasing water, and provides a reference for the risk analysis of water inrush in overlying goaf under similar engineering conditions and the detection of water accumulation range.
【作者单位】： 大同煤矿集团有限责任公司;
【分类号】：TD745.2
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本文编号：1891159