石泉煤矿厚煤层综放开采导水裂缝带高度实测研究

Study on field measurement of water-conducting fracture zone height of comprehensive mining of thick coal seam in Shiquan Coal Mine

为研究石泉煤矿厚煤层综放开采导水裂缝带发育规律,为矿井工作面浊漳河下采煤提供科学依据,采用地面钻探水文观测和钻孔电视方式探测了30105综放工作面导水裂缝带发育高度和钻孔内裂隙直观展布特征,并将实测结果与相邻潞安矿区其他煤矿实测数据进行了对比分析。结果表明,本矿井实测综放导水裂缝带发育高度为顶板以上114.51~117.54 m,裂采比为19.09~19.59,高度基本与采厚成正比,并获得了裂缝带高度计算经验公式。研究成果可以用于指导本矿井河流下采煤和顶板水害防治。

In order to study the development of the water-conducting fracture zone of comprehensive mining of the thick coal seam in Shiquan Coal Mine,and provide the scientific basis for mining under the Zhuozhang River in the mine face,the development height and the intuitive distribution characteristics of the cracks in the borehole of the water-conducting fracture zone of 30105 comprehensive mining coal face were detected by the ground drilling hydrological observation and the borehole television methods,and the measured results were compared and analyzed with other coal mines′measured datas in the neighboring Lu'an mining area.Results showed that the measured water-conducting fracture zone heights of comprehensive mining were 114.51~117.54 m above the roof,and the crack-to-production ratios were 19.09~19.59.Height was basically proportional to the mining thickness,and the empirical formula for calculating the height of the fracture zone was obtained.Research results could be used to guide the coal mining under the river and the prevention of roof water hazards in this mine.