Electronic Resource
Prediction model for drilling torque.
| العنوان: | Prediction model for drilling torque. |
|---|---|
| المؤلفون: | Pizarro S., MiNiN 2012: 5th International conference on innovation in mine operations Santiago, Chile 20-Jun-1222-Jun-12 Codelco |
| بيانات النشر: | Santiago, Chile Gecamin 2012 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | A drilling torque study has been carried out on four lithologic units at the Mantoverde copper mine in Chile: the West Andesite (AW), East Waste (AE, andesite-diorite), Hydrothermal Breccia (MA) and the Transition Zone (ZT, specularite stockwork). The objectives were to understand drilling using the torque as a variable, predict drilling operational state under fixed parameters, and evaluate improvement opportunities. The average torque for each lithological unit was calculated and laboratory tests performed on intact rock samples. Statistical analyses were carried out on laboratory and mine-scale torque data and a theoretical model obtained to achieve scale-up from laboratory to mine operation. It was found to be possible to re-run laboratory tests on new lithological areas to predict operational torque. This allows the assessment of key variables which depend on the specific energy of the rock to be drilled, such as rpm operation range and pull-down capability of possible drilling machines, and the design variables that need to be modelled (drilling rate and operational diameter of the tricone). The model was found to be valid in a range of 5% to 8% of the top hammer pressures exerted between the hand drill and the mining drilling machine, equivalent to the pull-down forces exerted on the respective drill areas. A drilling torque study has been carried out on four lithologic units at the Mantoverde copper mine in Chile: the West Andesite (AW), East Waste (AE, andesite-diorite), Hydrothermal Breccia (MA) and the Transition Zone (ZT, specularite stockwork). The objectives were to understand drilling using the torque as a variable, predict drilling operational state under fixed parameters, and evaluate improvement opportunities. The average torque for each lithological unit was calculated and laboratory tests performed on intact rock samples. Statistical analyses were carried out on laboratory and mine-scale torque data and a theoretical model obtained to achieve scale-up from laboratory to mine operation. It was found to be possible to re-run laboratory tests on new lithological areas to predict operational torque. This allows the assessment of key variables which depend on the specific energy of the rock to be drilled, such as rpm operation range and pull-down capability of possible drilling machines, and the design variables that need to be modelled (drilling rate and operational diameter of the tricone). The model was found to be valid in a range of 5% to 8% of the top hammer pressures exerted between the hand drill and the mining drilling machine, equivalent to the pull-down forces exerted on the respective drill areas. |
| مصطلحات الفهرس: | ANDESITES, BRECCIA DEPOSITS, CHILE, COPPER, DIORITES, DRILLING, FIELD TESTING, HAEMATITE, LABORATORY STUDY, MANTOVERDE, MINING, MODELLING, OPEN CAST MINING, PENETRATION RATE, ROCK MECHANICS, SCALE UP, STATISTICAL ANALYSIS, text |
| URL: | ed. R. Kuyvenhoven, J.E. Morales, C. Vega%C% |
| الاتاحة: | Open access content. Open access content |
| ملاحظة: | und |
| Other Numbers: | UKMMM oai:icon.iom3.org:116063 1309244143 |
| المصدر المساهم: | INSTITUTE OF MATS MINERALS & MINING From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1309244143 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |