The Role of Barriers beneath Stream Beds in Preventing Unplanned Discharges from Northern Appalachian Coal Mine Pools
A high profile unplanned discharge at the Margaret # 7 Mine in 1979 provided information on the performance of the strata barrier between the mine pool and the lowest point on the surface.Additional information collected from the Urling # 1,# 2, # 3, and the Parkwood Mines provide examples of successful strata barrier designs.Three important factors were identified:1.The thickness of thestrata barrier,2.The magnitude of the positive hydraulic head differential, and3.The absence of high extraction ratio mining beneath stream channels.This study also found that strata barrier fracture permeability may be locally impacted by the overlying orientation and conditions of the stream channel.Conditions impacting fracture permeability include:1.The natural fracture s ystems ,2.Valley stress-relief, and3.Excessive horizontal stress conditions.All of these factors and conditions should be considered when designing strata barriers to control unplanned discharge from Pennsylvania mine pools
Anthony lannacchione John VanNess Hannah Giacomir Gabriel Frank
University of Pittsburgh Undergraduate, University of Pittsburgh
国际会议
The 34th International Conference on Ground Control in Mining (ICGCM) 2015(34届国际采矿岩层控制会议)
焦作
英文
133-144
2015-10-17（万方平台首次上网日期，不代表论文的发表时间）