ガス突出発生時の坑道埋没機構に関する調査および実験的研究 (第1報)
1962 年 78 巻 888 号 p. 454-459
詳細
1962 年 78 巻 888 号 p. 454-459
We can see many times the galleries buried with the debris to almost all section. in a considerable length after the occurence of outbursts of gas and coal. These practical situations appear very important, to us in order to throw light on the mechanism of outbursts which was almostly unknown up to date.
In this report, that is to say, in 1st report of.this subject the authors looked over many memoirs concerning the outbursts of the past to generalize them typically into four groups.
As a result of this consideration, it was recognized that almost all of outbursts on a large scale had brought a buried situation of gallery.
On the other hand, the authors investigated a buried situation of outbursts occured recently in the “A” Coal-Mine in Hokkaido District (an outburst size-about 800 tons broken), and there sampled the debris in some points. After several calibrations and experimental data of the samples of debris, the authors could comprehend somethings as follow:
(1) The outbursts of “A” Coal-Mine was a typical case in relation to the buried situation of gallery too.
(2) The internal gas pressure near the outlet of gas and coal was comparatively low and changeable at that in duration of projection.
(3) The debris projected was almost broken through attrition.
