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In order to study the dynamic law and differential response of coal deformation for different gases in the whole process of adsorption-desorption, the deformation test was carried out under the conditions of adsorption-desorption of CO2, CH4 and N2 in primary coal by utilizing the dynamic test platform for adsorption / desorption deformation of coal bodies. The results show that the adsorption strain of each gas changes with time in Langmuir form, and the coal bodies with the strong adsorption gases exhibit larger deformation and faster response. The body strain of different adsorbed gases in the process of desorption decreases with the increase of desorption amount in a nearly linear manner, and the desorption shrinkage of the strong adsorption gas is more significant, but the residual deformation is also larger, and the residual body strain of CO2 is twice that of CH4, and that of CH4 is almost twice that of N2. With the same desorption gas amount, the shrinkage deformation caused by CH4 is the most obvious, and the shrinkage deformation caused by CO2 and N2 is about 1/3 of it. In the whole process of adsorption and desorption, the adsorption strain is anisotropic and changing constantly, and the adsorption strain in the direction perpendicular to the bedding is always larger than that parallel to the bedding. The change of anisotropy coefficient of CO2 is the largest, that of N2 is the next, and that of CH4 is the smallest.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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