6KANG Hong-pu,ZHANG Xiao,SI Lin-po.Study on In-Si-tu Stress Distribution Lawin Deep Underground Coal Mining Are-as. Proceeding of the ISRM-Sponsored InternationalSymposium on Rock Mechanics:"Rock Characterisation,Mod-elling an Engineering Design Methods",SINOROCK2009 . 2009
7Christopher Mark.The Introduction of Roof Bolting to U.S. Underground Coal Mines(1948-1960). Proceeding of 21st International Conference on Ground Control in Mining . 2002