Stress detection and destressing techniques to control coal mine bumps.
Haramy-KY; Maleki-H; Swanson-D
Proceedings: Mechanics and Mitigation of Violent Failure in Coal and Hard-Rock Mines. Washington, DC: U.S. Bureau of Mines, 1995 May; :210-215
Dangerously high stress areas in underground coal mines can be controlled by proper mine planning and/or destressing. This paper reviews practical methods to detect and destress high-stress zones within coal faces and mine pillars. The U.S. Bureau of Mines investigated stress-related problems in several underground mines. Laboratory and field test results of the drilling-yield method for high-stress detection were conducted to determine the correlation between the volume of cuttings obtained and the magnitude of applied stress. The results indicate that this method can be used effectively to locate high-stress zones within longwall panels. In-mine experiences and a three-dimensional computer modeling program were used to evaluate the effectiveness of stress relief methods. These studies show that the occurrence of coal bumps can be reduced by properly implementing destressing techniques. However, careless use of stress relief methods may increase the potential for a coal bump. Areas within different mines have site-specific characteristics that will indicate how the effective the stress-relief methods are. Techniques applicable to longwall and room-and-pillar mining for both Eastern and Western U.S. coal mines are discussed.
Mining-industry; Coal-mining; Rock-falls; Rock-bursts; Rock-mechanics; Underground-mining; Control-technology; Geology; Geophysics; Engineering-controls; Ground-control; Ground-stability
Book or book chapter
Maleki-H; Wopat-PF; Repsher-RC; Tuchman-RJ
DRC; SRC; TCRC
Proceedings: Mechanics and Mitigation of Violent Failure in Coal and Hard-Rock Mines