1971～1982年におけるガス突出に関する研究の概観
1983 年 99 巻 1146 号 p. 701-704
詳細
1983 年 99 巻 1146 号 p. 701-704
In this paper the outline of recent progress in researches of the cause, mechanism and prediction and prevention methods of gas outbursts is described.
It is presumed that the rock pressure caused by excavations play an important roll in the cause of gas outbursts. And a number of hypotheses for the cause and mechanism of gas outbursts are put in order simply.
For the prediction of gas outbursts, AE and rock tremors have been measured by accelerometers or seismometers earnestly. But the pattern for a sympton which can predict gas outbursts has been still in groping. It is expected that the relation between AE and the pattern of fracture of rock or coal will be studied in the future.
Moreover, gas concentration in the air near the face is being measured continuously by the automatic recorders at present.
For the prevention methods of gas outbursts, a method by removal of stress in roof strata is offered and tested in situ. If the above method is proved to be effective, the development of the more economical methods based on this method will be expected.
