摘要
为确定煤巷掘进工作面瓦斯卸压排放带宽度,分析了煤巷瓦斯在有限流场单向不稳定流动的规律,建立了瓦斯在有限流场单向不稳定流动的数学模型并求出其解析解,推导出煤巷瓦斯卸压排放带宽度的计算公式并对计算公式在现场进行应用和验证。结果表明:煤巷瓦斯卸压排放带宽度与煤层原始瓦斯压力、煤层透气性系数成正比,与煤壁初始瓦斯涌出强度、煤壁瓦斯涌出衰减性系数成反比,采用公式计算值与现场测定结果相符。
In order to determine the width of gas pressure relief discharge belt in coal roadway working face,the lawof unidirectional unstable gas flowof in finite flowfield is analyzed,the mathematical model of unidirectional unstable gas flowin finite flowfield is established and the analytical solution is obtained,the calculation formula of the width of gas pressure relief discharge belt is concluded and the formula on the spot is confirmed and applied. The results showed that the width of gas pressure relief discharge belt was proportional to the caol bed primitive gas pressure and the coal bed permeable coefficient,and in reverse proportion to the coal wall initial gas discharge intensity,the calculated value by the formula coincided with the result which was determined on the spot.
作者
孙锐
SUN Rui(State Key Laboratory of The Gas Disaster Detecting,Preventing and Emergency Controlling,Chongqing 400037,China;China Coal Technology and Engineering Group Chongqing Research institute,Chongqing 400037,China)
出处
《沈阳理工大学学报》
CAS
2018年第3期80-85,共6页
Journal of Shenyang Ligong University
基金
国家科技重大专项任务资助项目(2016ZX05067004-001)
国家自然科学基金资助项目(51304237)
关键词
有限流场
单向不稳定流动
煤壁瓦斯涌出强度
瓦斯卸压排放带宽度
finite flow field
unidirectional unstable flow
gas emission intensity of Coal wall
the width of gas pressure relief discharge belt
