Ground response curves for longwall support assessment

摘要: AbstractThis paper presents the ground response curve concept as a means to provide graphical representation of longwall support and strata interaction processes. The approach was developed address requirement for practical evaluation selection tool that can take account load influences such changes in roof geology or cover depth. Several factors be investigated including different setting yield loads, canopy tip-to-face distance, width, coal seam strength influences, hydraulic supply pressure variations variance over life. An example is given specification new supports at an Australian underground mine. One major advantage its ability represent graphically typical from real operating data. A rudimentary strata-support diagram usually derived using measured leg values, stiffness test data routine observ...