Citation: | MENG Pan, YE Jinyan. Fracture development of overlying strata and optimization of high position boring: with working face 34low 2 in Qinan mine as example[J]. COAL GEOLOGY & EXPLORATION, 2012, 40(2): 19-22. DOI: 10.3969/j.issn.1001-1986.2012.02.005 |