TY -的A2 Jimenez-Martinez华金盟——黄Bingxiang AU - Lu, Weiyong PY - 2018 DA - 2018/09/16 TI -甲烷受水的流固耦合数学模型在多孔煤炭SP - 7049830六世- 2018 AB - water-driven-methane效应的存在瓦斯煤已经验证通过现场试验和实验室实验。然而,water-driven-methane数学模型,考虑甲烷吸附和解吸尚未建立。基于water-driven-methane过程流固耦合数学模型建立了甲烷的水。验证模型的可靠性water-driven-methane物理实验的结果,通过使用一个解决COMSOL多重物理量的软件。孔隙压力的时空分布规律,water-methane两相饱和度,孔隙压力梯度water-driven-methane过程进行了分析。结果显示以下。(1)water-driven-methane多孔煤流固耦合数学模型是可靠的。(2)在water-driven-methane过程中,有一个增加区和减少区域煤样的孔隙压力。孔隙压力的增加区是最接近的进水口,和它的面积逐渐减少。孔隙压力的降低区是最接近的甲烷出口,和它的面积逐渐增加。 Over time, the methane pressure in the increasing zone of pore pressure first increases and then decreases, and the methane pressure in the decreasing zone of pore pressure continuously decreases. The change (increase or decrease) rate of the methane pressure gradually decreases from both ends towards the middle of the coal sample. (3) The curve of the water saturation over time changes from a lower concave curve to a straight line, while the curve of the methane saturation with time changes from an upper convex curve to a straight line. The methane saturation in the decreasing zone of pore pressure is greater than that in the increasing zone of pore pressure. Over time, the water saturation of a specific point in space continuously increases while its methane saturation continuously decreases. Both of the increase rate of the water saturation and the decrease rate of the methane saturation gradually reduce over time. (4) The pore pressure gradient along the driving direction first decreases and then increases. The decreasing zone of the pore pressure gradient is located in the increasing zone of pore pressure, and the increasing zone of the pore pressure gradient is located in the decreasing zone of pore pressure. Over time, the pore pressure gradient at the side of the water inlet increases, and its increase rate decreases. The pore pressure gradient at the side of the methane outlet decreases, and its decrease rate decreases. The rate of increase in the pore pressure gradient at the side of the water inlet is greater than the rate of decrease in the pore pressure gradient at the side of the methane outlet. SN - 1468-8115 UR - https://doi.org/10.1155/2018/7049830 DO - 10.1155/2018/7049830 JF - Geofluids PB - Hindawi KW - ER -