The influence of stream valleys on coal mine ground control.
Proc 7th Int'l Conf on Ground Control in Mining 1988 Jan; :247-258
Over 50 mines of the Appalachian and Illinois Basins are presently experiencing poor ground conditions believed to be caused by overlying stream valleys. This paper describes research being conducted by the Bureau of Mines into the causes of this problem with the aim of developing a predictive method for determining the safe limits of mining beneath stream valleys. In addition, the factors that control instability in these regions will be analyzed to provide design guidelines for adjusting support requirements.
OP; Conference/Symposia Proceedings
Proc. 7th Int'l Conf. on Ground Control in Mining