共 2 条
- [1] THICK SEAM COAL MINING. A REVIEW COMPILED BY THE CHAMBER OF MINES RESEARCH ORGANISATION. South African Mining and Engineering Journal, 1980, 91 (4166): : 52 - 54
- [2] Study on upward mining of sublevels for gob-side entry retaining in three-soft thin coal seam group Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering, 2012, 29 (03): : 322 - 327