Experimental study of deformation rules during the process of gas adsorption and desorption in briquette coal

被引：17

作者：

Nie, Baisheng ^{[1
]}

Hu, Shoutao ^{[1
]}

Li, Xiangchun ^{[1
]}

Zhai, Shengrui ^{[1
]}

Meng, Junqing ^{[1
]}

机构：

[1] China Univ Min & Technol, Sch Resource & Safety Engn, State Key Lab Coal Resources & Safe Min, Beijing 100083, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MINING RECLAMATION AND ENVIRONMENT | 2014年 / 28卷 / 05期

关键词：

adsorption-desorption; pore gas; swelling expansion; residual deformation; STRESSED COAL; CO2; PORES;

D O I：

10.1080/17480930.2013.877630

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Gas is one of the most important factors which causes coal and gas outburst and can influence the mechanical characteristics of coal. Coal itself is a kind of elastic carbonaceous material which can swell and shrink under the influence of gas adsorption and desorption. Solid deformations influence the porosity of coal which also changes its adsorption and desorption capability. Gas pressure due to gas adsorption in porous materials is the cause of elastic deformation of coal, which can be assessed by direct experimental measurements. In this paper, briquette coal samples are made with different sizes of coal particles and the deformations are tested during the process of gas adsorption and desorption in samples under different gas pressures. The results show that coal swells during gas adsorption and shrinks during desorption. Deformation of different coal samples under different gas pressures is variable. It is further observed that deformation of coal is proportional to gas pressure and particle size. Also, deformation is not recoverable and residual deformation develops. The relationship between residual deformation and gas pressure is derived. This study helps to reveal the damage mechanism of pore gas in cola mass.

引用

页码：277 / 286

页数：10

共 24 条

[1] TRANSIENT GAS-FLOW AROUND BOREHOLES [J].