百米钻孔瓦斯流量数值模拟研究及应用  

Numerical simulation study and application of hectometre borehole gas flowrate

作　　者：赵忠明[1] 董伟[1] 魏国营 施天威 ZHAO Zhongming1, DONG Wei1, WEI Guoying2, SHI Tianwei1(1. College of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454003, China; 2. College of Safety Science and Engineering, State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo, Henan 454003, Chin)

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454003 [2]河南理工大学安全科学与工程学院,河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地,河南焦作454003

出　　处：《采矿与安全工程学报》2018年第2期436-441,共6页Journal of Mining & Safety Engineering

基　　金：国家科技重大专项项目(2011ZXOS040-005);长江学者和创新团队发展计划资助项目(IRT1235);河南理工大学博士基金项目(B2013-053)

摘　　要：百米钻孔瓦斯流量是瓦斯抽采工程一项重要指标,目前这项指标只能从现场测得。为了指导瓦斯抽采设计,基于瓦斯渗流理论对瓦斯抽采中瓦斯含量数值模拟,利用数值积分和曲线拟合求得百米钻孔瓦斯流量的表达式。依据焦作演马庄矿27131工作面煤层瓦斯参数,研究了抽采负压、钻孔布置方式以及渗透率对百米钻孔瓦斯流量的影响并与现场实测值进行对比。结果表明:抽采负压对百米钻孔瓦斯流量影响很小;渗透率对百米钻孔瓦斯流量有显著影响,渗透率越大初始流量越大;钻孔的布置数量对钻孔流量有明显影响,钻孔数量越多初始流量越低。The hectometer borehole gas flowrate is an important index of the gas drainage engineering and can only be got from the field test nowadays. In order to improve the design of gas drainage, the numerical simulation is applied to get the gas content in gas drainage based on the seepage theory and the equation of hectometer borehole gas flowrate using the numerical integration and the curve fitting method. The influence of negative drainage pressure and borehole arrangement on hectometer borehole gas flowrate is theoretically analyzed in No.27131 working face on the basis of coal seam gas parameters and they are compared with field test data. The results show that the arrangement and number of borehole and permeability of coal seam are significant influencing the hectometer borehole gas flowrate, while the effect of negative drainage pressure can be neglected.

关 键 词：百米钻孔瓦斯流量 瓦斯含量 数值模拟 数值积分 曲线拟合 

分 类 号：TD712[矿业工程—矿井通风与安全]