Evaluation of success probability in multiple seam room-and-pillar mining

摘要: Abstract A complete evaluation of multiple seam mining potential for any coal property requires the analysis historical data and controlling conditions. The major problem affecting is interaction between workings in contiguous seams. success or failure scam can be evaluated using statistical techniques. computer-based stepwise regression algorithm used to develop an equation predicting probability two seam-mining situations. model provides a measure risk involved are from record attempted Eastern United States. variables significantly influencing percent sandstone interburden, ratio interburden thickness lower thickness, time delay, both seams, depth cover upper seam, columnated pillars, entries leading seam. developed was found quite satisfactory as predictor within range which it developed.