NRR Mining and consulting was founded with the objective of providing comprehensive mining solutions to the burgeoning African mining industry with the intention of going global as the company grows. The provision of mining solutions will be achieved by applying sound mining practices and using software packages available in the market to bring ...
Get the edge in fragmentation. Powder Factor Solutions is a specialist drill & blast design team based in Western Australia serving our global customers through cloud-based technologies. Utilising cutting edge modelling algorithms; which extend and expand on current industry best-practice; PFS supports your team to deliver optimal rock fragmentation across your entire mining operation.
Jul 16, 2018· This gives us a baseline of how we need to go about fragmenting rock for each particular application. A baseline for powder factor or a standard number typically is one pound of explosives per cubic yard of rock. This would be a powder factor of one. We use powder factor to measure pounds per yard to achieve specific results from the blast.
Powder factor or specific charge or blasting ratio This is the ratio between the mass of explosives required to break a given quantity of rock and is normally expressed in kg/m3 or kg/t3. Table 1 is a guide to the powder factor for a given type of explosive in various types of rock. Chat Online; Geology of the Powder River Basin Wyoming and Montana
Steps in Opencast mining 1) Determination of mine boundaries: Exclusion of: high SR area (deep seated, hill, thinning/splitting of seam, stone parting, geologically disturbed areas (faults), low quality areas, etc. natural boundaries (river/nallah, faults), township, railway line, operational factors like optimum strike length for transportation.
Aug 08, 2016· There is a term optimum powder factor, which may be defined as the powder factor required for the optimum fragmentation, throw, ground vibration, etc. for a specified blast condition to minimize the overall mining cost. Presently, the powder factor is established through the trial blasts.
A common indicator for excessive dilution is the usage of planning "adjustment" factors (mass and/or grade multiplier). These could typically be block model factor (typically grade), mine design factor (typically tonnes and grade), mine call factor / schedule factor (typically tonnes and grade), process factor (typically contained metal), etc.
Powder Factor. Powder factor and the appropriate charging of drill holes is very important in underground mining as malfunctions are very common in the close proximity of loaded holes and the confining environment creating unfavorable breaking conditions. The above equations may be used to estimate parameters of a blast with other known values.
A new iron ore deposit is to be worked by surface mining methods with 15 m benches using 150 mm diameter blastholes. Since the prevailing condition is dry rock, it has been decided to use bulk ANFO with emulsion cartridges as primer. Assume that the overall density of compacted ANFO and the primer as 0.85 g/cm3 and the powder factor of 0.6 kg ...
Powder Factor Relationship between how much rock is broken and how much explosives are used to break it Specific charge, charge factor, specific explosive consumption are used in place of powder factor, in the field ISRM commission on blasting has suggested to use either powder factor or specific charge Expressed in kg/m3 or kg/t
The optimum powder factor in most of mines in CIL was recorded. The powder factor in NCL, BCCL, SECL, ECL, WCL and West Bokaro Collieries was in range of the optimum powder factor and quality of explosives was measured. The rating index of bulk explosives is varied in between 70 and 100. The powder factor in hard rock was 1.5 to 2.5m3/kg and in ...
Powder Factor is defined as the amount of explosive required to dislodge and fragment 1 cubic yard of rock.  The softer (less dense) the material that is being blasted; the smaller the powder factor. Blastability Index (BI) is a variable calculated from the rock mass description (RMD), location of any cracks or weaknesses (referred to as ...
Powder metallurgy is the process of blending fine powdered materials, pressing them into a desired shape or form and then heating the compressed material in a controlled atmosphere to bond the material. Mining is the extraction of valuable minerals or other geological materials from the earth, from an ore body, vein or (coal) seam.
Powder Factor Selection for Improved Rock Fragmentation at AngloGold Ashanti Iduapriem Limited Eme Precious, Prof Sulemana Al-Hassan and Prof Richard K. Amankwah . Mining Engineering Department, University of Mines and Technology . Eme, P., Alhassan, S. and Amankwah, R. K. (2018), Powder Factor Selection for Improved Rock
Jan 01, 2015· In this light, the present study was conducted in opencast phosphate mines to see the effect of Schmidt hammer rebound number or transformed compressive strength of rocks on the powder factor. The correlation was found sufficiently reliable to enable the determination of an optimum powder factor for surface bench blast in different rock types ...
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