An Applications Approach to Barrier Pillar Design for Improved Resource Recovery.
Koehler-JR; Jones-SD; Demarco-MJ
Proc 30th U S Symp on Rock Mech Morgantown West Virginia, Balkema 1989 :403-410
Available barrier pillar design methods do not adequately account for overburden caving characteristics, the timing and magnitude of associated load transfers, the occurrence of unusual geologic features, or the effects of multiple-panel, multiple-seam mining. To address this problem, the U.S. Bureau of Mines, in cooperation with Cyprus Plateau Mining Corp., conducted a barrier pillar study in a multiple-seam mine setting. Insufficient barrier width resulted in excessive load transfer to an adjacent underlying section. Consequent entry and pillar deterioration resulted in the section being prematurely abandoned. This paper proposes an approach based on in situ measurements, which includes mine-specific loading conditions in the barrier design process.
Proc. 30th U.S. Symp. on Rock Mech., Morgantown, WV; Balkema, 1989, PP. 403-410