摘要
为解决工作面回采期间上隅角瓦斯超限问题,针对硫磺沟煤矿主采工作面实际情况,采用物理模拟及数值模拟手段,对工作面采动覆岩"三带"及卸压瓦斯运移优势通道分布特征及规律开展研究,结合工作面实际情况设计高位钻孔抽采上隅角瓦斯,并对抽采效果开展实时观测与分析。结果表明:通过物理相似模拟实验,得到(4-5)04工作面覆岩"三带"高度,工作面初次来压、周期来压步距,裂隙区在切眼、工作面及进回风巷出的宽度等参数;综合分析数值模拟及现场观测结果得到工作面合理配风量及抽采负压;通过现场观测,得到高位钻孔抽采浓度为19.85%~23%,有效抽采段距离平均为54.5m,表明高位钻孔抽采方法和设计参数是科学有效的。
To solve the gas overrun in upper corner during mining, the distribution law and characteristics of overburden strata ＂three zones＂ during mining are studied by physical simulation experiment, according to the situation of （4-5） 04 working face in Liuhuanggou Coal Mine. High level borehole is designed for gas drainage in upper corner of working face and its drainage effect is observed and analyzed in real time. The height of overburden strata ＂three zones＂ of （4-5） 04 working face, first weighting interval, average periodic weighting distance are obtained, so is the fracture zone width in open-off, return airway, airway and working face, through physical simulation. Reasonable air supply and drainage sub- pressure of working face are obtained by numerical simulation and field observation. The drainage concentration of high level borehole is 19.85% - 23%, the average effective distance of borehole is 54. 5m, which indicate that high level bore hole drainage method and its parameter are scientific and efficient.
出处
《煤炭工程》
北大核心
2017年第5期76-79,共4页
Coal Engineering
基金
国家自然科学基金科学仪器基础研究专款(51327007)
国家自然科学基金资助项目(51174157
51604219)
西安科技大学科研培育基金项目(201651)
西安科技大学博士科研启动金项目(2015QDJ056)
关键词
倾斜煤层
综放工作面
高位钻孔
瓦斯抽采
物理相似模拟
Fluent数值模拟
inclined seam
fully mechanized top coal caving face
high level borehole
gas drainage
physical similar simulation
FLUENT numerical simulation
