TY  - EJOU
AU  - Zhang, Xuebo 
AU  - Jia, Zhiwei 

TI  - Influence of Ground Stress on Coal Seam Gas Pressure and Gas Content
T2  - Fluid Dynamics \& Materials Processing

PY  - 2019
VL  - 15
IS  - 1
SN  - 1555-2578

AB  - The influence of ground stress was quantitatively analyzed on coal seam gas pressure and gas content in this paper. Mining activities in coal mine can result in stress concentration in the coal (rock) body around the mining space, but porosity of the coal seam would not change too much. Therefore, gas pressure and gas content in the coal seam are slightly affected. Studies showed that the free gas was gradually transformed into adsorbed gas, and the gas adsorption volume was small, and then gas pressure increases roughly linearly when the porosity decreased because of stress influence. Additionaly, when porosity of coal seam reduced to 40%, the amount of adsorbed gas accounted for no more than 10% of coal seam gas content, and the increase of gas pressure did not exceed 15% of the original gas pressure.
KW  - Ground stress
KW  -  coal seam porosity
KW  -  gas pressure
KW  -  gas content
KW  -  stress concentration

DO  - 10.32604/fdmp.2019.04779