Application of Numerical Modeling Techniques for Gateroad Design in Bump Prone Mines.
Paper in Longwall U S A Industrial Presentations Inc Aurora Colorado, 1989 :88-89
Coal mine bumps continue to cause serious accidents involving loss of life and extensive damage to mining properties. Bumps are characterized as releases of energy associated with unstable yielding that occurs with progressive mining. Unstable release of energy occurs when the coal and rock are not able to absorb the excess energy released by the surrounding rock mass during the yielding process. The U.S. Bureau of Mines, as part of its coal mine bump research program, is developing computational procedures utilizing accepted principles and methods to aid mine operators in eliminating and reducing the occurrence of bumps. This paper presents recent work aimed at demonstrating how numerical modeling techniques can be useful in distinguishing between the merits of using one mine configuration over another to minimize coal bump potential. Some basic theory and potential failure mechanisms are discussed in a mining context. Key elements required for future development are identified. These developments will allow numerical model analysis to be a useful tool for distinguishing between stable, nonviolent pillar yielding versus an unstable, violent pillar collapse.
Paper in Longwall U.S.A.; Industrial Presentations, Inc., Aurora, Co, 1989, PP. 88-89