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Keywords: chain pillarClose
Paper presented at the 11th ISRM Congress, July 9–13, 2007
Paper Number: ISRM-11CONGRESS-2007-221
... used to relieve the stress as well as to pre-condition the dolerite above the following two panels. The shortwall on the N° 2 Seam has experienced mid-face loading due to N° 4 Seam chain pillars lying over this area and creating a secondary cantilever effect. Pre-split blasting of the solid rock above...
Paper presented at the 10th ISRM Congress, September 8–12, 2003
Paper Number: ISRM-10CONGRESS-2003-173
... ABSTRACT The use of coal pillars at depth is fraught with problems due roof control difficulties and the possible occurrence of coal or pillar bumps. In the USA the largest and most important application of pillars at depth is in longwalling, where chain pillars are the customary supports...
Paper presented at the 5th ISRM Congress, April 10–15, 1983
Paper Number: ISRM-5CONGRESS-1983-165
... under the profiles, the integrity factor is proposed here as a rational parameter for evaluating chain-pillar stability. RESUME: Les profils des charges causees par l'exploitation minière, ainsi que les profils des resistances residuelles au travers des piliers varient avec la positfon du "longwall...
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