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| 考虑煤岩变形和煤对瓦斯吸附特性的煤体渗透规律试验研究 |
| Experimental study on the seepage law of coal considering deformation of the coal rock and the adsorption characteristics |
| Received:August 02, 2017 Revised:November 03, 2017 |
| DOI：10.7520/1001-4888-17-155 |
| 中文关键词: 煤 可变形 吸附 渗透系数 渗透率 |
| 英文关键词:coal deformable adsorption permeability coefficient permeability |
| 基金项目:国家重点发展计划项目资助(2016YFC0600704)；国家自然科学基金资助(51504123)；辽宁省教育厅一般项目资助(LJYL029) |
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| 中文摘要: |
| 通过开展气体在原煤试件中的三轴稳态渗流试验，研究了煤岩受自身变形及气体吸附作用影响的渗透特性。借助试验数据和控制方程的解析解，采用遗传初值的高斯-牛顿法，求解了受外加载荷和孔隙压力影响的渗透系数函数。结果表明，煤岩变形、煤对瓦斯的吸附作用以及气体的滑脱效应均会对其渗流特性产生影响，使得吸附性气体在可变形原煤试件中的渗流具有随外加载荷及孔隙压力变化的典型非线性规律。 |
| 英文摘要: |
| Through tri-axial steady state seepage flow experiment for gas in raw coal specimen, the permeation characteristics of coal petrography affected by its own deformability and gas adsorption were studied. With the assistance of experimental data and the analytical solution of governing equation, using Gauss-Newton method with genetic initial value, the permeability coefficient function affected by external load and pore pressure is solved. Study results show that the gas adsorption induced by coal deformability and the gas slippage effect may affect the permeation characteristics. The seepage of adsorptive gas in the deformable raw coal specimen has the typical nonlinear pattern with the change of external load and pore pressure. |
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