刘瑜, 李文平, 刘少伟, 尚荣, 邢茂林. 2016: 潜埋煤层开采整体结构覆岩导水裂缝带高度特征. 工程地质学报, 24(s1): 308-315. DOI: 10.13544/j.cnki.jeg.2016.s1.046
    引用本文: 刘瑜, 李文平, 刘少伟, 尚荣, 邢茂林. 2016: 潜埋煤层开采整体结构覆岩导水裂缝带高度特征. 工程地质学报, 24(s1): 308-315. DOI: 10.13544/j.cnki.jeg.2016.s1.046
    LIU Yu, LI Wenping, LIU Shaowei, SHANG Rong, XING Maolin. 2016: HEIGHT OF FRACTURED WATER-CONDUCTING ZONE IN UNDERMINED COMPLETE-STRUCTURAL ROCK STRATA. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 308-315. DOI: 10.13544/j.cnki.jeg.2016.s1.046
    Citation: LIU Yu, LI Wenping, LIU Shaowei, SHANG Rong, XING Maolin. 2016: HEIGHT OF FRACTURED WATER-CONDUCTING ZONE IN UNDERMINED COMPLETE-STRUCTURAL ROCK STRATA. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 308-315. DOI: 10.13544/j.cnki.jeg.2016.s1.046

    潜埋煤层开采整体结构覆岩导水裂缝带高度特征

    HEIGHT OF FRACTURED WATER-CONDUCTING ZONE IN UNDERMINED COMPLETE-STRUCTURAL ROCK STRATA

    • 摘要: 针对榆神府矿区侏罗系煤层开采导水裂缝带发育高度与传统预计结果存在明显差异的问题,以榆阳煤矿为实际研究背景,在分析水文工程地质条件的基础上,利用原位测试、理论分析与计算机数值模拟等方法,研究了整体结构覆岩下导水裂缝带高度发育特征。研究结果表明:侏罗纪覆岩中砂岩的含量百分数为85%左右,较石炭-二叠纪煤田覆岩中砂岩含量高,侏罗纪煤层顶板覆岩沉积面不明显且纵向裂隙不发育;导致导高发育异常主要原因为顶板覆岩结构的整体性与岩性特征;离散元数值计算结果中覆岩中结构面发育与结构面不发育的情况下导水裂隙带高度分别为60m与95m,验证了覆岩结构整体性是导致导水裂隙带高度异常的主要因素之一。

       

      Abstract: For significantly different of height of fractured water-conducting zone in Yu-shen-fu and the traditional results, Yuyang mine is taked as study area. The height of fractured water-conducting zone was analyzed based on analysis of hydrogeological conditions, situ testing, theoretical analysis and numerical simulation. The results show that the percentage content of sandstone(about 85%) in the overlying strata of the Jurassic coal bed roof than Permo-Carboniferous. The thickness of the overlying strata of the Jurassic coal bed roof is larger and the vertical fracture is not developed. The main reason for the height anomaly of the water flowing fractured zone is that the integrity of the roof covering structure is better. The height of water flowing fractured zone was tested and calculated by using the field measurement and discrete element simulation methods. The results showed that the height of water flowing fractured zone were 60m and 95m for the structural plane development and none development of coal seam overlying strata, respectively, which is proved that the overlying rock structure is the main factor leading to the height of water conducting fractured zone.

       

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