Aerostatic Support System for Underground Coal Mines.
bm-N; morrell-PA; Schmidt-RJRL
Proc 7th Intn'l Conf on Ground Control in Mining Morgantown West Virginia, 1988 Aug; :259-270
This paper describes a ground support system developed by the Bureau of Mines for use with an underground coal auger. The system consists of inflatable airbags that are inserted in the holes as they are drilled, and then gradually deflated to provide controlled roof caving. Laboratory and field tests of the system show it to be technically feasible.
Proc. 7th Intn'l Conf. on Ground Control in Mining, Morgantown, West Virginia, Aug. 3-5 1988, PP. 259-270