抄録
The work of preliminary experiment on gas drainage at Oshima Colliery appeared in 1953, for the first time.After further experiments and fundamental survey, one of the most ideal system of gas drainage from virgin coal bearing seam was established in 1958.The application of the system contributed much to the increase of safety and of productivity, and thus, to the overall rationalization of underground and brougth the reduction of cost.
The gas drained was used in boilors or gasfurnaces, just after the gas drainage was started. Later, since 1961, the gas has been supplied to a gas turbine generator of 6, 000kW in capacity. Output of the generator fills now about 90% of the total electric power consumption of the Oshima Colliery.
In this paper, the general outline of the Oshima Colliery will be described, first of all, and then the sole reason that has brought the establishment of the gas drainage in the Colliery results of the gas survey, detailed explanation of the system of gas drainage and utilization of the drained gas, will be described respectively.
