Electronic Resource
Integrating blastholes into exploration data to improve coal recovery and modelling.
| العنوان: | Integrating blastholes into exploration data to improve coal recovery and modelling. |
|---|---|
| المؤلفون: | Stedman H., Ninth international mining geology conference 2014 Adelaide, South Australia 18-Aug-1420-Aug-14 |
| بيانات النشر: | Carlton, Victoria Australasian Institute of Mining and Metallurgy 2014 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | Traditional exploration databases are based on 250 m drill hole spacing; incorporating lithological blasthole data (spaced at 20 m) into an established exploration database can significantly improve geological predictions. A smaller distance between drill holes shows up structural details more clearly, and allows for the modelling of fault planes. Once the coal roof surface is modelled from the integrated database a blast stand-off distance can be designed specific to the strip. Detailed structural modelling is critical for drill and blast design to avoid leaving hard 'toe' and damaging the coal roof in the blast. Coal reconciliation using an exploration model only can produce false results and give rise to inaccurate economic decisions. A comparison of hypothetical models of two strips shows that at 250 m spacing the Strip 01 model underestimated coal by 5% (100 000 t as opposed to 105 000 modelled at 20 m spacing) and Strip 02 overestimated coal by 5% (125 000 as opposed to 119 048 at 20 m spacing). If Strip 01 reconciliation had detected this loss, mining methods could have been improved for Strip 02, which could potentially increase recovery to 98%. Traditional exploration databases are based on 250 m drill hole spacing; incorporating lithological blasthole data (spaced at 20 m) into an established exploration database can significantly improve geological predictions. A smaller distance between drill holes shows up structural details more clearly, and allows for the modelling of fault planes. Once the coal roof surface is modelled from the integrated database a blast stand-off distance can be designed specific to the strip. Detailed structural modelling is critical for drill and blast design to avoid leaving hard 'toe' and damaging the coal roof in the blast. Coal reconciliation using an exploration model only can produce false results and give rise to inaccurate economic decisions. A comparison of hypothetical models of two strips shows that at 250 m spacing the Strip 01 model underestimated coal by 5% (100 000 t as opposed to 105 000 modelled at 20 m spacing) and Strip 02 overestimated coal by 5% (125 000 as opposed to 119 048 at 20 m spacing). If Strip 01 reconciliation had detected this loss, mining methods could have been improved for Strip 02, which could potentially increase recovery to 98%. |
| مصطلحات الفهرس: | BLASTHOLE PATTERNS, BLASTHOLES, BLASTING, COAL, DATA PROCESSING, DATABANKS, ECONOMIC GEOLOGY, EXPLORATION DRILLING, FAULTS, GRADE CONTROL, MODELLING, ORE RECOVERY, STRUCTURAL CONTROLS, UNDERGROUND MINING, text |
| URL: | %C% |
| الاتاحة: | Open access content. Open access content |
| ملاحظة: | und |
| Other Numbers: | UKMMM oai:icon.iom3.org:116245 URN:ISBN:978 1 925100 12 9 1309243805 |
| المصدر المساهم: | INSTITUTE OF MATS MINERALS & MINING From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1309243805 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |