How to Plan Your Mine for Methane Control.
Proc Ann Meeting Illinois Min Inst Springfield Illinois, 1969 Oct; :23-30
Methane is expected to become more of a problem in coal mines as deeper coals are exploited and as nongassy coals are worked out. Because deep gassy coals are difficult to mine, relief can best be found in planning and designing new mines for methane control. This starts with exploration where large diameter vertical boreholes can be developed for multiple use. These boreholes will provide large coal samples for physical property measurements and washability studies, and for draining methane from the coal before mining. They will also provide escapeways for men, service entrances for power and water, and auxiliary ventilation conduits, especially for gob drainage. Mining machines, which produce a minimum of coal fines should be specified. These machines produce a lower rate of methane emission from the mined coal. Mines should be designed to yield the smallest possible perimeter to reduce the amount of methane entering the mine. Large blocks of coal should be isolated from virgin coal early in mine development to permit maximum controlled bleedoff of methane. The suggested approach requires no radical new techniques.
Proc. Ann. Meeting, Illinois Min. Inst., Springfield, Illinois, Oct. 9- 10, 1969, PP. 23-30