内蒙古门克庆煤矿导水裂隙带高度探测及发育规律

Water Conducted Zone Height Survey and Development Regularity in Menkeqing Coalmine,Inner Mongolia

为研究门克庆煤矿导水裂隙带发育高度及发育规律,在3101工作面已采区域施工钻孔,采用钻井液漏失量观测法、井下彩色电视成像、超声成像探测方法对导水裂隙带发育高度进行实测,并采用FLAC3D软件对导水裂隙带的发育高度及发育规律进行研究。探测结果表明,门克庆煤矿3101工作面导水裂隙带顶部与煤层的距离为132.90m,裂采比为26.85。实测结果与经验公式计算结果相比差距较大,应以实际探测的结果为准。数值模拟研究表明,覆岩破坏形态呈两边高、中间低的马鞍形,并且导水裂隙带在采动裂隙发育比较充分的采空区边缘处发育最高。

To study water conducted zone developed height and development pattern in the Menkeqing coalmine,based on working face No.3101 mined area drilling boreholes,through drilling fluid loss observation,downhole color TV imaging,ultrasonic imaging etc methods carried out height measurement,and using FLAC3D carried out study on water conducted zone developed height and development regularity.The results have shown that the spacing between top of water conducted zone and coal seam is 132.90m,the ratio of water conducted zone height to shear height is 26.85.Difference between measured result and empirical formula computed result is rather large,should be subject to the measured result.Numerical simulation study has shown that the overburden failure form presents both sides high and middle low saddle shape,and the development of water conducted zone in mining induced fissure developed rather ample worked-out area edge is highest.