39021采面高位钻孔抽采规律及布置层位研究

Study on Law of High-Level Borehole Drainage and Layer Layout at 39021 Working Face

为了提高39021工作面采空区瓦斯抽采效果,针对高位钻孔技术开展相关研究和考察。依据采动裂隙演化规律和理论确定冒落带、裂隙带范围,类比39011工作面高位钻孔设计,确定39021高位钻孔布置参数,并通过考察工作面回采期间抽采纯流量,验证设计的可行性,考察出高位钻孔布置适宜的垂距、平距和与切眼的距离。

In order to improve the gas drainage effect in goaf of 39021 working face,relevant research and investigation were carried out on the technology of high-level borehole drilling.Based on the evolution law and theory of mining fracture,the authors determine the area of caving zone and fracture zone,and the layout parameters of 39021 high-level borehole by analogy with the design of 39011 working face high-level borehole,and verify the design feasibility and the suitable vertical distance,horizontal distance and the distance from the open-off hole by observing the drainage pure flow.