Experimental study on gas permeability by adsorption under 3D-stress

• 来源期刊: 煤炭学报（英文版）
• 年，卷（期）: 2009,（2）
• 页码范围: 148-151
• 页数: 4页
• 语种: 英文
• DOI: 10.1007s12404-009-0207-5

摘要

Using self-developed gas-seepage experimental installation, under the same effective stress conditions, coal permeability experiments on different adsorption charac-teristics of gases, different temperatures and different gas adsorption contents were per-formed, and the influence law of adsorption on coal permeability was studied. At the same time, experimental analogy showed clearly that gas drawing plucks the permeability varia-tion law. The results show that adsorption has a major impact on coal permeability. The greater the adsorption, the more the gas adsorption capacity and the coal permeability becomes smaller. Permeability becomes smaller along with confining of pressure and temperature, and this is in accord with local practice results.