工作面覆岩裂隙带内抽放钻孔施工参数优化研究及应用  

Optimization Study and Application of Construction Parameters for Drainage Drilling in the Overburden Rock Fracture Zone of the Working Face

作　　者：杨杨 Yang Yang(Changzhi Company Wangzhuang Coal Industry,Jinneng Holding Group,Changzhi 046000,China)

机构地区：[1]晋能控股集团长治公司王庄煤业,山西长治046000

出　　处：《煤矿现代化》2024年第4期62-67,共6页Coal Mine Modernization

基　　金：国家重点研发计划项目(2022YFB1314005)。

摘　　要：为了研究覆岩裂隙带内定向钻孔施工参数布设合理性,以晋城市境内某矿井21215工作面为工程背景,基于气体流动控制方程机理并采用COMSOL多物理场仿真软件建立三维数值模型,对4种不同顶板定向钻孔方案的瓦斯治理效果进行了模拟研究,结果表明:方案2能够更好地对采空区内瓦斯进行拦截和分流,对于工作面上隅角位置处高浓度瓦斯积聚的治理效果最优;顶板定向钻孔最合理施工参数为水平间距和垂直间距分别取值为3 m和2 m。现场工业性试验期间在回风巷内间隔为310 m的1、2和3号钻场位置处各施工一组顶板定向钻孔,每组内包含12个定向钻孔,能够持续稳定的实现对于工作面开采期间的瓦斯治理。In order to study the rationality of the layout of directional drilling construction parameters in the overlying rock fracture zone,taking the 21215 working face of a certain mine in Jincheng City as the engineering background,a three-dimensional numerical model was established based on the gas flow control equation mechanism and COMSOL multi physics field simulation software.The gas control effects of four different roof directional drilling schemes were simulated and studied.The results showed that scheme ii can better intercept and divert gas in the goaf,The control effect of high concentration gas accumulation at the upper corner of the working face is optimal;The most reasonable construction parameters for directional drilling on the roof are horizontal spacing of 3 meters and vertical spacing of 2 meters,respectively.During the on-site industrial test,a set of roof directional boreholes were constructed at positions No.1,2,3 drilling sites with an interval of 310 meters in the return airway,each containing 12 directional boreholes,which can continuously and stably achieve gas control during the mining period of the working face.

关 键 词：高瓦斯 定向钻孔 数值模拟 瓦斯浓度 瓦斯流向 

分 类 号：TD712[矿业工程—矿井通风与安全]