Coal mine bump research: providing tools for rational longwall design.
Proceedings of the 23rd International Conference of Safety in Mines Research Institutes, September 11-15, 1989, Washington, DC. Washington, DC: U.S. Bureau of Mines, OFR 27-89, 1989 Sep; :666-676
Coal mine bumps, the violent failures of over stressed coal, present a safety hazard to miners in underground coal mines. To help alleviate this hazard, the Bureau of Mines is pursuing an extensive research program with the ultimate goal of developing a mining layout design procedure that minimizes bump hazard. The foundation of this research program is the delineation of the detailed reactions and physical properties of the bump-prone coal strata through in-mine evaluation of various mining layouts. One room-and-pillar retreat section and two longwall gate road configurations have been intensively instrumented in deep Southern Appalachian coal mines with a history of coal bumps. Stress and deformation measurements from these instrumented areas have provided valuable insight into the strata response associated with pillar bumps. Currently the gob loading distribution and the strata caving characteristics at the longwall mine are under investigation through instrumentation installed under the panels and in surface boreholes. Data from these field investigations will be used in the development of a nonlinear, displacement-discontinuity model that will use energy changes caused by mining to predict a bump hazard. Using this model, multiple trial mining layouts and sequences can be quickly and easily simulated in order to minimize the relative bump hazard.
Mine safety; Mining; Mining industry; Underground mines; Underground mining; Coal mines; Coal mining; Geology; Room and pillar mining; Longwall mining
OP; Conference/Symposia Proceedings
NTIS Accession No.
Proceedings of the 23rd International Conference of Safety in Mines Research Institutes, September 11-15, 1989, Washington, DC