WhatsApp)
Presplit blasting Spacing = Hole diameter x 12 Burden = x production blast burden (B) Uncharged length at top = 10 x D Powder factor = per square metre of face Do not stem holes. Fire all holes on the same delay, or in groups of ≥ 5 holes Smooth blasting Spacing = 15 x Hole diameter (hard rock) 20 x Hole diameter (soft rock)
Changes in blast parameters show results in that cost reduced to Rs /t with powder factor improved to t/kg, drilling factor of t/m and tonnage per hole increased to 1443 t(per hole getting 68 t more). showed improvement as compared with the previous blast design.
Rock Fragmentation by Blasting – a review The rock fragmentation process in mining currently being practiced in India needs reexamination to improve the productivity of the mine.
equipment for sizing of limestone in india Construction Waste Crusher Construction waste refers to the construction, construction units or individuals to construct, lay or demolish all kinds of buildings, structures and pipe networks, etc., and generate the spoil, spoil, waste, residual mud and other wastes generated during the repairing process.
Powder Factor In Blasting Lime Stone Mining India. Process Of Drilling And Blasting In Mines At India. mining process drilling blasting iron ore,16 Aug 2013,The Zenith is Read more production of lime stone powder Newest Crusher, Grinding . Get Price
Effect of Stemming to Burden Ratio and Powder Factor on Blast Induced Rock Fragmentation– A Case Study SANDEEP PRASADa*, CHOUDHARYb and MISHRAc aResearch Scholar, Department of Mining Engineering, IIT (ISM) Dhanbad, India bAssistant Professor, Department of Mining Engineering, IIT (ISM) Dhanbad, India
Check the availability of the blasting shelter, your blasting equipment, the face, the drill pattern, exposure within and around the blast area, and the availability of adequate stemming. Diagram. Diagram the shot as drilled and delay timings. Measure. Measure the burden, spacing and depth, noting any deviations. Calculate. Calculate the powder ...
The actual mine data in respect of different mining parameters was collected and a time motion study was carried out. Data analysis for a few important parameters is summarized below: Situation Analysis Blasting : The powder factor is found to be highly variable. Drilling : The yield per m is found to be low and there is 40% spare drilling ...
Powder factor = per square metre of face Do not stem holes. Fire all holes on the same delay, or in groups of ≥ 5 holes Smooth Blasting Spacing = 15 x Hole diameter (hard rock) 20 x Hole diameter (soft rock) Burden = x Spacing Fire as many holes as possible on one delay. Stem holes. Powder factors Typical powder factors
Jul 16, 2018· 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 In Blasting Lime Stone Mining Sudan – xinhai. Powder Factor In Blasting Lime Stone Mining Sudan Miners Mining, Quarry Mining, Open Cut Coal Mine, Mine Blasting Procedures, Hard Rock Mining, Undermining Blasting Video YouTube, Photos of Old Miners Blasting, Mine Explosives Blasting, Blasting Operations, What Is Sand Blasting, Mining Explosions, Cast Iron Balls Used in Mining ...
Mining cost is governed by various sub activities, viz. drilling, blasting, excavation, study carried out for a limestone mine in central India is presented. 1. . the cost saving that could be derived after their implementation has been calculated.
powder factor in blasting lime stone mining india; Blasting mechanics: Material properties and powder factor. Apr 17, 2019· Powder factor is the amount of explosive (pounds) to the total amount of rock blasted (tons) to develop a scale which some use to develop a blast design.
Jan 01, 2015· The correlation was found sufficiently reliable to enable the determination of an optimum powder factor for surface bench blast in different rock types, maintaining the required blasting results regarding fragmentation. ... Proceedings of the 3rd. on Stability in Open Conference on Stability in Open Pit Mining, Vancover, Google ...
coal, limestone, metallic ores, etc. Stone quarries in Indian context suggest very different operational experience due to numerous factors, small area under mining lease, lower bench height, vicinity to residential and other structures, higher degree of segregation of oversized boulders required after blasting, and heterogeneous geology, to
Powder Factor In Blasting Lime Stone Mining India. Process Of Drilling And Blasting In Mines At India. mining process drilling blasting iron ore,16 Aug 2013,The mpl is Read more production of lime stone powder Newest Crusher, Grinding. get price
The use of Powder Factor in blast design The Powder Factor can be used to design the distribution of explosives in the rock mass that is to be blasted. The critical dimension is the burden distance which is the shortest distance to stress relieve when a shothole .
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.
Jul 16, 2018· Today we are going to talk about what role powder factor plays in our daytoday applications of drilling and blasting. Powder factor is expressed in many different forms. Essentially it is a measurement of explosives per quantity of rock.
Dept. of Mining Engg. Indian School of Mines, Dhanbad – 826 004, India Email: kausdey Abstract The main objective of fragmentation by blasting is to achieve the optimum powder factor, which may be defined as the powder factor required for the optimum
Limestone Mining In British India. limestone quarry plant stone crusher machine in india stone . limestone quarry plant. the first step in quarrying is to gain access to the limestone deposit. this indian limestone quarries images and videos. Online Chat Methodsin Lime Stone Mining In India. Limestone Mining In British India 1 British
Powder Factor = Tons of rock (or cubic yards) per pounds of explosive. Normal range = 4 to 7 Shallow holes = 1 to 2 External loads = .3 Tons of Rock = Powder Factor lbs of Explosives The higher the powder factor, the lighter the load. Lower powder factor means more explosives. Example: tons = PF of BURDENSPACING CALCULATION From ...
Optimization of blast is dependent on a host of complex factors related to the rock, explosive, initiation, drillhole parameters and their layout. The present work is a step in the direction of developing a suitable blast model, with simple methodologies which can be adapted by the mining industry to achieve better blasting .
Rock Fragmentation by Blasting – a review The rock fragmentation process in mining currently being practiced in India needs reexamination to improve the productivity of the mine.
WhatsApp)