陕西煤炭2026，Vol.45Issue(1)：7-13,26,8.DOI:10.20120/j.cnki.issn.1671-749x.2026.0102
循环荷载作用下煤层瓦斯压力变化规律研究
Variation law of coal seam gas pressure under cyclic loading
ZHANG Fan 1WANG Bo 1LI Pengfei 1DANG Yabin2
作者信息
- 1. Dongjiahe Coal Mine Branch,Shaanxi Shanmei Chenghe Mining Co.,Ltd.,Weinan 714000,China
- 2. Shaanxi Shanmei Chenghe Mining Co.,Ltd.,Weinan 714000,China
- 折叠
摘要
Abstract
Coal seam gas seepage is one of the serious natural disasters that threaten the safety of coal mining,which is one of the main problems that need to be solved in the development of China's mining industry.In this paper,the coal sample of briquette is taken as the research object,and the variation law of coal seam gas pressure under cyclic load is studied by nu-merical simulation experiment.The numerical simulation of this paper mainly uses Comsol Multiphysic software to study the evolution of coal gas pressure under different initial gas pressure conditions under cyclic loading,the evolution of coal gas pressure under different axial pressures,the evolution of coal gas pressure under different confining pressures,and the evolu-tion of gas pressure under different stability times.It is found that:Under cyclic loading,different stabilization times have lit-tle effect on coal gas pressure.Under different initial air pressures,the gas pressure change law of coal body is not obvious;Under the same axial pressure,the trend of gas pressure is similar.During the coal circulation disturbance,under different axial load conditions,the larger the upper limit value of axial pressure load,the greater the amount of gas pressure change,and the closer to the axial pressure loading area,the higher the growth rate of gas pressure change.During the unloading process of different axial pressures of 4 MPa and 6 MPa,the change rate of gas pressure at each position of the coal body is different,but the lower limit of the coal body gas pressure has little effect.The evolution characteristics of gas pressure in-side coal under different stability times were studied,and it was found that under cyclic loading,different stabilization times had little effect on coal gas pressure.关键词
煤与瓦斯渗流/瓦斯压力/数值模拟/含瓦斯煤/循环荷载Key words
gas-containing coal/gas pressure/coal and gas seepage/numerical simulation/cyclic load分类
矿业与冶金引用本文复制引用
ZHANG Fan,WANG Bo,LI Pengfei,DANG Yabin..循环荷载作用下煤层瓦斯压力变化规律研究[J].陕西煤炭,2026,45(1):7-13,26,8.
