沁新煤矿综采工作面冒落带高度探讨

Study on Caving Zone Height at Fully Mechanized Face in Qinxin Coal Mine

为了使处于近距离多煤层群开采条件下的综采工作面采空区获得准确的冒落带高度值,使得工作面高位抽采钻孔能够取得更好的抽采效果,采用了理论经验公式计算并结合对现场实测抽采钻孔瓦斯纯量变化数据的分析,对两者得出的结果进行比较,从而准确得出回采工作面上覆岩层的冒落带高度值。

In order to get accurate height value of caving zone in fully mechanized working face gob under the condition of a close distance and multiple coal seam,thus enabling the extraction drill hole on the high working face to obtain better extraction effect,adopts the theoretical empirical formula for calculation and analyzes the data of gas purity change in the drilling extraction of field testing,the results of the two aspects are compared to obtain an accurate height value of caving zone on overlying rock layers at the mining working face.