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The use of non-explosive demolition compounds has been extended within recent years to mining of building materials, as well as for the demolition of buildings and concrete structures in urban conditions. This environmentally friendly method has not been used in action for underground mining. The paper presents the outcomes of the research aimed at the elaboration of a new technology for underground mining of hard ores based on the use of demolition method as an alternative to the explosive one. A new compound of ...

Coal is an important energy resource in world. Coal mine exploitation with nonmechanized methods, need expert labors and with out them, mining process will be deranged so the labors and their safety is really important. In many industrial countries the accidents are the most important cause of person’s death. According to I.L.O (International Labor Organization) reports 120,000,000 accidents occur per year and 210,000 people die in these accidents. It means more than 500 people per day. In order to decreasing the ...

Most of the salt that is being consumed in Iran is produced through stope and pillar mines, located in north of the central desert of Iran. The very large stopes have been excavated for applying open cut loading and hauling machines, so that those stopes have to be supported by large pillars. Therefore, the excavation ratio and stability considerations should be studied as two special cases in these mines. To determine the pillar’s strength, in this paper, four of the largest mines have been studied. An experiment...