Several problems and countermeasures on mining block direction change period of Antaibao Open Pit Mine徐志远, 才庆祥, 刘宪权9-12
Calculation on allowed water sucking height of mine main drainage pumpMIAO Jing-quan, GUO Jian-ping12-13
Reducing ventilation increasing to improve benefit and have mine safety productionZHANG Xiao-chun14-15
Control valve flow direction choosing principle and the example analyzingPANG Ming-Jun, ZHANG Suo-Long17-19
Comments on design of large volume silo type inclined coal bunker at mine shaft bottomZHENG Shu-zhu28-30