近距离煤层群沿空掘巷小煤柱留设研究
贺中海,刘晓宁,马进功
Research on Narrow Pillar Design for Roadway Driving Along Goaf of Short-distance Coal Seams Group
煤炭工程 . 2015, (8): 4 -7 .  DOI: 10.11799/ce201508002