并行高密度电法监测技术在榆树田煤矿工作面导高实测中的应用

Application of parallel high density electrical monitoring technology in the measurement of conductivity height in working face of Yushutian Coal Mine

为保证榆树田煤矿防治水工作的顺利开展,以110501工作面实际工程条件为背景,现场应用并行高密度电法技术,得出顶板覆岩电场的变化规律,进一步反映采动影响下顶板覆岩的变化规律,掌握顶板覆岩破坏规律。研究表明,垮落带高度为30.7 m,位于下4煤与下3煤之间的中砂岩层位;导水裂隙带高度为73.7 m,位于下1煤顶板上细砂岩和粗砂岩分界面附近。垮高/采厚比为3.1,裂高/采厚比为7.5,下5煤层采动应力超前影响距最大为65 m。研究为矿井防治水工作的顺利开展提供了保障。

In order to ensure the smooth implementation of water prevention and control work in Yushutian Coal Mine,based on the actual engineering conditions of the 110501 working face,and through on-site application of parallel high-density electrical method technology,the variation law of the electric field of the roof cover rock is obtained,further reflecting the variation law of the roof cover rock under the influence of mining,and mastering the failure law of the roof cover rock.Research has shown that the height of the collapse zone is 30.7 meters,located in the middle sandstone layer between the lower 4 coal seam and the lower 3 coal seam.The height of the water conducting fracture zone is 73.7 meters,located near the interface between fine sandstone and coarse sandstone on the roof of the lower 1 coal seam.The ratio of collapse height to mining thickness is 3.1,the ratio of crack height to mining thickness is 7.5,and the maximum leading influence distance of mining stress in the lower 5 coal seam is 65 meters.The research provides a guarantee for the smooth implementation of mine water prevention and control work.