黄陵矿区二矿高位裂隙钻孔瓦斯抽采有效性分析

An analysis of the effectiveness of gas extraction by high-positioned fissure drill-holes made in No.2 Mine in Huangling mining area

阐述了采用高位钻孔瓦斯抽采的技术关键,确定了工作面上方的冒落带和裂隙带高度,并结合现场实测数据考察了钻孔的有效利用率和钻场间距合理性,结果表明:黄陵矿区二矿107工作面回风巷高位裂隙钻孔布置较合理,能够解决工作面瓦斯涌出量较大的问题,如果降低钻孔仰角,使钻孔的终孔位置位于冒落带之上、裂隙带的中下部,可以更有效抽采瓦斯。

This paper elaborates on the key technology used in gas extraction via high positioned drill holes.It also determines the height of caving zones and fissure zones over working faces and also probes the effective utilization ratio of drill holes and the rationality of drill field spacing according to the test data obtained on site.The results show that the arrangement of high positioned drill holes are rationalized in the fissire zones in the return air entry of 107 face,which can handle large gas inflow in coal faces.When the drill hole elevation angles are reduced to allow the ends of the drill holes to reach the location above caving zones and the middle-lower part of fissure zones,an even effective gas extraction can be realized.