Gas Desorption and Transportation in Original Coal of Baijiao Coal Mine Under Temerature-stress Loading Condition
This paper presents experimental investigation on gas desorption and transportation in bulk coal under temperature-stress conditions, focusing on gas emition at three stages, heating stage, uniaxial loading stage and confined pressure loading stage. These tests conducted to simulate the effects of underground mining conditions on bulk coal itself were carried out by a Coal Sample Temperature-Pressure Coupling Experimental System. Through these tests, the desorptive volume of sampled gases were measured, the relationship between crack propagation and gas emit pressure was studied, the emitted gas volume and sampled gases concentrations of each stage were compared. The results show that CH4 has a larger desorption rate than CO2, confined pressure contributes more to gas emition than the uniaxial stress, and it will result in high gas pressure and high concentration of sampled gases, which will cause high possibility of danger.
desorption transportation concentration gas emition crack volumetric strain
X.H. Zhang Y. Chang X.L. Ren
School of Mechanics, Architecture and Civil Engineering, China University of Mining and Technology, Beijing, China;State key laboratory for Rock mechanics and Deep underground Engineering, Beijing, China
国际会议
重庆
英文
735-738
2015-12-18(万方平台首次上网日期,不代表论文的发表时间)