Experience with Stress Control Methods as a Planning Tool - Elouera Colliery

摘要

Continued extraction of the No.3 Seam at Elouera Colliery required the driveage of a sequence of roadways within an arearnof significantly elevated horizontal stress. Initial roof conditions varied from excellent to very severe as the panel enteredrnthe high stress area. The variation was attributed to the extraction sequence, with different roadways "leading" the panelrninto the high horizontal stressfield.rnThis paper summarises field and analytical work designed to evaluate the use of stress control methods as an effectivernplanning tool. The "leading" roadway of the panel would be required to remain stable whilst experiencing moderate tornsevere deformation whilst the neighbouring roadways (stress relieved) could be driven at more acceptable advance ratesrnusing less reinforcement.rnThe planning implications of developing the panel with stress control methods are discussed.