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کنگره و نمایشگاه بین المللی معدن
جزئیات رویداد
همایش ، رویداد ، ژورنال
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  • blast management plan for opencast mine adjacent to underground colliery

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    • تاریخ ارائه: 1389/07/20
    • تاریخ انتشار در تی پی بین: 1389/07/20
    • تعداد بازدید: 613
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the paper deals with a systematic study of large-scale coal mine blasting operations in open-pit and its influence on underground colliery. sixteen blasting trials with varying explosives weight and initiation sequences were conducted at samleshawari open-pit mine and eighty four blast vibration data were recorded in the hingir rampur underground colliery in india. these involved multi-seam coal mine workings. the number of holes detonated in a blast round varied from 16 to 242 and their depth varied between 4 m and 14 m. the amount of explosives detonated in a blast ranged between 800 kg and 37260 kg, with explosives weight per delay varying between 100 kg and 6140 kg. the depth of cover between underground vibration monitoring locations and open-pit blasting face varied between 105 m and 174 m. the recorded peak particle velocities varied widely (e.g. 1.3 mm/s to 172 mm/s in the roof, and 0.7 mm/s to 64 mm/s in the pillars). analysis of vibration data showed that the roof of the underground openings vibrated with up to 4.3 times the amplitude of those in the pillars and the floors. it was also observed that coal chips detached from roof when the peak particle velocity reached 131 mm/s or higher.

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