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顶板导水裂隙带是煤层顶板水进入工作面的重要通道.根据工作面采空区的空间形态和超限应力、有限空间的特点,采用岩层角位移临界值为判据,得出了导水裂隙带高度计算公式,并且将理论计算值与任楼煤矿实测数据进行了对比,验证了该公式正确可靠.通过该公式分析表明:采高与导水裂隙带高度的线性相关、碎胀系数、角位移值临界值越小,导水裂隙带高度越大,其中采高和碎胀系数权重较大.
The roof water-conducting fracture zone is an important channel for the coal seam roof water to enter the working face.According to the characteristics of the space shape and over-limit stress and the limited space of the goaf, the critical value of the rock- The fracture height calculation formula is compared with the measured data of Renlou coal mine and the results show that the formula is correct and reliable.The analysis of the formula shows that there is a linear correlation between mining height and the height of water- The smaller the critical value of the angular displacement, the greater the height of the water-conducting fracture zone, and the higher the weight and the coefficient of the coefficient of expansion.