Microseismic monitoring of bump-prone areas.
Procceedings of the Fifteenth Annual Institute on Coal Mining Health, Safety and Research, Blacksburg, Virginia, August 28-30, 1984. Blacksburg, VA: Virginia Polytechnic Institute and State University, 1984 Aug; :167-177
Microseismic techniques have been used in both room and pillar and longwall geometries in coal mines to detect and analyze the rock noise generated by the stress changes accompanying mining of the coal seam. The purpose of these monitoring efforts has been to determine the effectiveness of microseismics as a tool to help determine where and when bumps are likely to occur. Results to date from in-mine field tests indicate that bump areas can be delineated by locating the source of individual rock noises relative to the mine structure and plotting this information on mine maps. Potential failure areas are shown by concentrated rock noise activity. Results also indicate that the rate at which rock noise occurs varies dramatically before failure. Thus, the stability of each area -delineated can be estimated by plotting the rate at which rock noise occurs. In some instances, determination of where and when bumps will occur has been possible. Representative case histories are presented.
Underground-mining; Room-and-pillar-mining; Longwall-mining; Structural-analysis; Coal-mining; Mine-shafts; Mining-industry; Rock-falls; Noise-levels; Noise-control; Disaster-prevention
Karmis-M; Sutherland-WH; Lucas-JR; Forshey-DR; Faulkner-GJ
Procceedings of the Fifteenth Annual Institute on Coal Mining Health, Safety and Research, Blacksburg, Virginia, August 28-30, 1984