石炭のガス脱着性によるガス突出ゾーンの研究

抄録

According to the continuous curve of gas desorption of coal a percentage of gas volume emitted at initial to the total (D_init) and a ratio of gas volume emitted at initial to the one occluded inthe coal (R_init) were calibrated. Besides, , the authors found a hysteresis of gas in the repeating process of adsorption and desorption, and estimated a gas accumulability of coal (M_ac); and moreovermeasured “Δp” which indicates a gas volume emitted at initial in a calibrating method standardized by I. L. Ettinger.
Thus, four properties in gas desorption of coal were closely examined. As a result of study on the mutual relation between four properties in gas desorption of the coal and some qualities of the one, the authors recognized the followings that
1) any coal which has higher values of D_init, R_init and M_ac is more pulverizable in general, . therefore, so as to estimate the situation of danger zone of gas issue a tentative method of pulveri zability of coal might be more effective,
2) in contrast to four properties in gas desorption with one another, gas zones in which packed the small crushed coal could be classified into six groups, and two of them might be marked in danger of gas issue.