煤矿安全2024，Vol.55Issue(7)：9-14,6.DOI:10.13347/j.cnki.mkaq.20221670
高温场下矿井煤层钻孔瓦斯抽排效果研究
Study on gas emission effect of coal seam borehole under high temperature field
摘要
Abstract
Aiming at the difficult problem of gas drainage in low permeability outburst coal seam in China,taking the transportation lane of coal mining face in K15 coal seam of Maizigou Coal Mine in Guizhou Province as the engineering background,through the establishing the multi-field coupling model of gas flow in coal mining face under high temperature field,the gas drainage effect of coal seam boreholes under different heating temperature,borehole diameter and borehole spacing conditions was simulated and stud-ied.The research shows that temperature has a significant impact on the effect of coal seam gas emission.When the heating temper-ature is 86℃,the gas pressure decreases significantly;the borehole diameter has a great influence on the effect of coal seam gas emission.When the borehole diameter is 113 mm,the maximum gas pressure between boreholes is 0.36 MPa,the maximum gas pressure decreases by 14.28%year on year,and the gas emission from boreholes increases by 27.27%.The effect of borehole spa-cing on coal seam gas pressure and discharge effect is also very obvious.When the borehole spacing is 1 m,the maximum gas pres-sure between boreholes is 0.45 MPa,and the influence range is 5.72 m.The decrease range of gas pressure increased by 37.8%com-pared with the hole spacing of 1.5 m and the influence range increased by 18.18%compared with the hole spacing of 1.5 m.The comprehensive gas discharge effect was the best.Comparing the simulation results of different schemes,the numerical simulation scheme 9 has the best gas emission effect.关键词
瓦斯解吸/瓦斯排放/密闭巷道/高温场/瓦斯灾害Key words
methane desorption/gas emission/enclosed roadway/high temperature field/gas disaster分类
矿业与冶金引用本文复制引用
杨进,谢雄刚,丁锐,曹文梁,熊欣标..高温场下矿井煤层钻孔瓦斯抽排效果研究[J].煤矿安全,2024,55(7):9-14,6.基金项目
国家自然科学基金资助项目(51864009,52104079) （51864009,52104079）
贵州省科技支撑计划资助项目(黔科合支撑[2021]一般353) （黔科合支撑[2021]一般353）
贵州省教育厅青年成长人才资助项目(黔教合ky字[2018]414) （黔教合ky字[2018]414）
