Browse

Pillars are key structural columns in underground mining. They are usually made of in situ intact ores and do not have additional reinforcements. Their main function is temporary or permanent support of ore ceiling of rooms during excavation and mining. Coal pillar strength is usually estimated according to empirical formulae obtained from field observations. Todays, numerical models have found increasing use in pillar design. The FLAC3D Software based Mohr-Coulomb Strain Softening (MCSS) failure criterion was use...

Ventilation networks in underground mines may be affected by items such as: locating of objects in air path or destruction of support systems which would result in pressure loss and distortion of air flow. By considering the necessity of keeping the network performances at appropriate level in such conditions, in this study, definition of ventilation network evaluation has been proposed which indicates the network reliability in an uncertain situation. Economic and safety concerns in mines involve this fact that t...

Mine ventilation has a key role to improving underground working conditions. Ventilation is required to clear dust, gas and toxic fumes from blasting and removing exhaust fumes from diesel equipments and also required for cooling the workplace for miners in deep hot mines. Ventilation systems need to take many possible modern mining scenarios into account, and costly infrastructure is needed to serve future ventilation and cooling requirements. To enable the practical and economical design of mine ventilation syst...

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 th...