基于CFD模拟的邻近层穿层钻孔瓦斯抽采优化设计  

Gas Extraction Optimum Design of Layer-Through Borehole in Adjacent Seam Based on CFD Simulation

作　　者：秦伟[1] 许家林[1] 吴仁伦[1] 胡国忠[1] 王中伟[1] 田根万[1] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,矿业工程学院,江苏徐州221116

出　　处：《采矿与安全工程学报》2012年第1期111-117,共7页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金重点项目(50834005);煤炭资源与安全开采国家重点实验室自主研究课题项目(SKLCRSM08X05)

摘　　要：以山西新大地煤矿15101综放面为研究对象,通过研究采动覆岩移动破坏规律及15101综放面邻近层卸压瓦斯抽采特征,确定了15101综放面穿层钻孔布置的基本原则,据此原则提出了穿层钻孔布置的6种优化方案,并利用FLUENT对优化方案进行计算。根据模拟结果,确定了邻近层穿层钻孔的最优布置参数:穿层钻孔终孔距15#煤底板垂直高度为50 m,终孔伸入工作面的水平距离为20 m。钻孔布置参数优化以后,新大地煤矿15101综放面邻近层瓦斯抽采取得较好效果,平均瓦斯抽采总量达到了51.8 m3/min。Taking the fully mechanized caving face 15101 in Xindadi coal mine,Shanxi province as the research object,we have studied the strata movement rules of the face and the characteristics of pressure-relief gas drainage in adjacent seam,determined the arrangement principle of layer-through boreholes in face 15101.In addition,6 optimization schemes were proposed,and the associated numerical simulations were conducted by using FLUENT.According to simulation results,the optimal arrangement parameters of layer-through boreholes in adjacent seam were determined finally.The results show that the vertical height of final hole to the floor of 15# coal seam is 50 m,and the horizontal distance of final hole is 20 m deep into the face.After the parameter optimization,the gas extraction of adjacent seam in face 15101 has obtained a favorable effect,and the average gas extraction quantity is up to 51.8 m3/min.

关 键 词：穿层钻孔 瓦斯抽采 CFD模拟 绿色开采 

分 类 号：TD72[矿业工程—矿井通风与安全]