采矿与安全工程学报 ›› 2012, Vol. 29 ›› Issue (1): 111-117.

• 论文 • 上一篇    下一篇

基于CFD模拟的邻近层穿层钻孔瓦斯抽采优化设计

  

  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
  • 收稿日期:2011-02-18 出版日期:2012-01-15 发布日期:2011-12-14
  • 作者简介:秦伟(1984-),男,河南省商丘市人,博士,从事岩层移动与绿色开采方面的研究。 E-mail:qw198427@163.com Tel:15162240184
  • 基金资助:

    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)

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

  • Received:2011-02-18 Online:2012-01-15 Published:2011-12-14

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。

关键词: 穿层钻孔, 瓦斯抽采, CFD模拟, 绿色开采

Abstract: 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.

Key words: layer-through borehole, gas extraction, CFD simulation, green mining