Electronic Resource
Modern underground blasting methods.
العنوان: | Modern underground blasting methods. |
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المؤلفون: | Konya A., Konya C.J., Worsey P. |
بيانات النشر: | Jacksonville, FL Mining Media Inc., 2017 |
نوع الوثيقة: | Electronic Resource |
مستخلص: | The main methods of underground blasting for face rounds are the burn cut, the V-cut, and the fan cut. The burn cut is a parallel hole cut, usually used in smaller drifts where space does not allow for angled drilling, in stronger rock types, and in metal mining. It provides good fragmentation and face advance and keeps the muck pile close to the face. Its major problems include drill deviation, design difficulties, difficult loading and hookup, and likelihood for deadpressing modern explosives. V-cuts and fan cuts both operate by angling drillholes to create a burden to the open face and creating a larger opening as the blast progresses. The V-cut generally allows for larger face advance and the ability to employ advanced vibration control measures, but it requires a much larger opening and can be more cumbersome to drill. The fan cut is less commonly used than the V-cut and can be used in smaller drifts, but can result in higher costs in larger rooms. V-cuts and fan cuts both produce a face advance less than a similar burn cut. Factors which affect choice of cut include desired fragmentation, desired condition of the muck pile, handling of boulders, and necessary drilling equipment. The main methods of underground blasting for face rounds are the burn cut, the V-cut, and the fan cut. The burn cut is a parallel hole cut, usually used in smaller drifts where space does not allow for angled drilling, in stronger rock types, and in metal mining. It provides good fragmentation and face advance and keeps the muck pile close to the face. Its major problems include drill deviation, design difficulties, difficult loading and hookup, and likelihood for deadpressing modern explosives. V-cuts and fan cuts both operate by angling drillholes to create a burden to the open face and creating a larger opening as the blast progresses. The V-cut generally allows for larger face advance and the ability to employ advanced vibration control measures, but it requires a much larger opening and can be more cumbersome to drill. The fan cut is less commonly used than the V-cut and can be used in smaller drifts, but can result in higher costs in larger rooms. V-cuts and fan cuts both produce a face advance less than a similar burn cut. Factors which affect choice of cut include desired fragmentation, desired condition of the muck pile, handling of boulders, and necessary drilling equipment. |
مصطلحات الفهرس: | advance rate, blasthole patterns, costs, MINING, working faces, text |
URL: | |
الاتاحة: | Open access content. Open access content |
ملاحظة: | und |
Other Numbers: | UKMMM oai:icon.iom3.org:173253 1309286174 |
المصدر المساهم: | INSTITUTE OF MATS MINERALS & MINING From OAIster®, provided by the OCLC Cooperative. |
رقم الانضمام: | edsoai.on1309286174 |
قاعدة البيانات: | OAIster |
الوصف غير متاح. |