Resultant Load Vector Studies on Shield Supports.
Proc 21st Int Conf of Safety in Mines Res Inst Sydney Australia 1985 Oct; :5 pages
The resultant load vector represents the forces applied to a longwall roof support element by caving strata as a single, quantifiable measure of support resistance. A technique has been devised whereby the resultant load vector can be determined for shield supports by instrumenting the support with pressure transducers and strain gauges to measure leg, canopy capsule, and lemniscate link forces. The method has been evaluated in the Bureau's mine roof simulator. Functional relationships among variables have been determined and confidence intervals established for predicting the resultant load vector parameters. Resultant load vector measurements for five shields on an active longwall face are consistent with shield mechanics and anticipated roof behavior.
Proc. 21st Int. Conf. of Safety in Mines Res. Inst., Sydney, Australia, Oct. 1985, 5 Pp