It is obvious that much progress has been made in Japanese coal mining technique in recent years. However, more efforts should be made on both coal getting and drifting technique to obtain 55, 000, 000 tons of coal per year as scheduled by goverment for domestic needs.
In this symposium, recent studies and future plans on coal mine mechanization have been stated by Dr. Mizuta, Prof. Emeritus, Tokyo University, in which high pressure hydrulic coal mining, selfpropeled props, coal getting technique at highly inclined coal seam using drumcutter, ripping machines, and tunnelling machines were introduced.
Following this presentation, production record of 62, 000 tpm from one working face was introduced by Mr. Takeuchi of Matushima Oshima Pit. This record was accomplished by rationalization of underground workings adopting cable belt conveyor, coal plainer, drumcutter and self propeled props.
Three presentations were made on the subject of drifting tunnels by Messers Kuraoka, Mitsui Miike Pit, Suzuki of Mitsui Ashibetsu Pit and Dr. Takaoka of Resources Reserch Institute. Two of three are about drifting record which were established at Miike (509.2mpm in coal seam) and Ashibetsu (211.4mpm in hard rock and 113mpm at inclined shaft), using conventional drifting system, and one was about tunneling machine which was originaly developed by Resources Research Institute.
Abovementioned presentations might be very valuable aids for developing coal mining technique in Japan.
抄録全体を表示