Stress Relief to Control Coal Bursts.
Haramy-KY; McDonnell-JP; Beckett-LA
Soc Min Eng AIME Preprint 87-57 1987 :12 pages
This report presents a review of the most widely used methods to detect and destress high stress zones along coal faces. Laboratory tests 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 the applied stress at various confining pressures. A three-dimensional multiple-seam computer modeling program, mulsim, was used to evaluate the effectiveness of stress relief methods. Modeling results and guidelines for destressing are presented. Results indicated that dangerously high stress areas can be controlled by either proper planning or destressing. Proper mine planning guidelines and destressing methods such as volley firing, hydraulic fracturing, and auger drilling are discussed.
Soc. Min. Eng. AIME Preprint 87-57, 1987, 12 PP.