きよう炭層岩石からのガスの流出について (第2報)
1971 年 87 巻 999 号 p. 401-406
詳細
1971 年 87 巻 999 号 p. 401-406
Concerning coal measure rocks containing high pressure gases, the flow of the gas caused by making a plane or cylindrical free face in the rocks was considered theoretically in the previous paper.
The authors have treated more acculate numerical analysis on the partial differential equations obtained for the subject. It is found that the flow of gas through the rocks is represented by simple equations, (13), (21) and (27). Using these equatios, the variation of the gas flow with time through the rocks is calculated for any pressure and permeability. In order to confirm the above analysis, the experiments were carried out on the unsteady flow of gas through the several kinds of porous media cosisted of a cement and sand. These experimental results agree fairly with the theoretical analysis.
These results could be useful for the design of gas drainage in coal mines and the extraction of natural gases in strata.
