Main Technology used in Mining Industry
For the purpose to suit the bad mining technical conditions, such as deep imbed, gentle dip angle, and high initial stress in Dongguashan deposit, the stoping scheme was optimized. The new mining technique, with temporary curtain walls, large panels and stopes, was achieved as well with Hongxing rotary kiln. The deposit model, which was built through the DATAMINE, was led into FLAC3D for numerical simulation. Based on these, the stabilities of pillars and stopes were analyzed. On the other hand, the impact of output stability by new scheme was verified with the help of optimization planning theory. The results show that stopes and curtain walls are safe when the width of temporary curtain walls between panels is 18 m. The length and width of stope increase to 78 m (82 m) and 18 m respectively, and those of panel increase to 300-500 m and 100 m respectively. The commercial test indicates that the new scheme can attain the aims of simpler production organization, better stope ventilation and work condition, smaller quantities of development and cutting, and 2/3 of equipments as before with the stable output. The pillar stoping technique is credible and valuable.
Mining techniques have transformed dramatically since mining began thousands of years ago. Early mining techniques in NSW, such as the iconic pick, shovel and gold prospecting pans and dryer machine, gave way to increasingly sophisticated technology for extraction and separation of mineral resources.
Mining methods are constantly changing and improving as companies forge new technologies to enhance rates of extraction and minimise impacts such as noise, dust and land and water disturbance. There are numerous mining methods utilised around the world including open-cut mining (truck-and-shovel, strip mining, quarrying and dragline), underground mining (stoping methods, bord-and-pillar, longwall, caving methods, cut-and-fill and retreat benching) and highwall mining. cone crusher:http://www.crusher-machine.com/4.html
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In NSW, the major mining methods in use are open-cut and underground (bord-and-pillar and longwall). Variations on these techniques are used in coal and metalliferous mining operations throughout the State, depending on the depth and type of the mineral resource. Occasionally there are differences across a mine site that result in a mixture of methods being used, such as at the Perilya mine near Broken Hill where a combination of underground methods are used to extract previously mined sections of the lead, zinc and silver mine.
Block cave mining is a mass mining method that allows for the bulk mining of large, relatively lower grade, orebodies. This method is increasingly being proposed for a number of deposits worldwide, thus the scope for a better understanding of block caving behaviour. Because many existing large open-pit mines are also planning to extend their operations underground by block caving, research is undergoing to investigate the rock deformation mechanisms associated with the transition from surface to underground mining operations.
Atlas Copco Construction Mining Technique is responsible for the sales, aftersales service and rental of equipment for surface and underground rock excavation, exploration drilling, rock reinforcement, ground engineering, water well, oil and gas drilling. Through our worldwide network of sales companies we are always close at hand to provide you with advice, repairs, services and spare parts.
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