南大夕張炭鉱におけるAE・地圧の連続計測について
1983 年 99 巻 1146 号 p. 711-714
詳細
1983 年 99 巻 1146 号 p. 711-714
In proportion to underground operational depth, observation of underground changes such as geopressure change became quite important to predict and avoid possible bursts.
Minami Oyubari Coal Mine has introduced a sophisticated computer system in 1982 which collects various data such as AE, Geopressure and Displacement, which also presents us useful results of analysis. The system consists of sensor, transmission, calculation and analysis sections. Maximum quantities of sensors are twenty each for AE and Geopressure and sixteen for Displacement. Each are buried mainly in gateroad near production area. Sensors send signals for twenty-four hours continuously through transmission to calculation and analysis sections.
Collected all data are analysed automatically by computer. It is also possible to calculate in various ways under an operator's instruction.
At present, calculation and analysis sections at surface are receiving relatively almost constant signals from underground which show abnormal pressure phenomenon would not occur for a time being.
Accumulation of data must be continued as it is indispensable for an accurate prediction and effective measurements against possible disaster.
