• Krishikosh: ANALYSIS OF POWDER FACTOR IN LIMESTONE MINE

    Keywords ANALYSIS, POWDER, FACTOR, LIMESTONE, MINE A CASE, STUDY . Theme POWDER FACTOR LIMESTONE MINE . Research Problem ANALYSIS OF POWDER FACTOR IN LIMESTONE MINE A CASE STUDY . Theses Type M.Tech. Abstract . In hard rock excavations, drilling and blasting is the cheapest method of rock breaking and it is widely Chapter 8 BLAST DESIGN NPS,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: 1.5 tons = PF of 6.25lbs BURDEN-SPACING CALCULATION From

  • (PDF) OPTIMUM POWDER FACTOR SELECTION IN BLAST

    limestone of medium strength range of 30Mpa-50Mpa which requires a powder factor of between 0.4kg/m and 0.6kg/m or 0.22kg/ton and 0.26kg/ton. Hence, an Limestone and Crushed Rock Energy,purposes of this report, limestone will be used as a sample for crushed rock. One product of limestone mining is lime. A wide range of industries use lime for a myriad of uses. It is used in many of the products and materials Americans use every day, including paper, steel, sugar, plastics, paint, and many more. The largest single use of

  • BASANTNAGAR LIMESTONE MINES

    TAKKALLAPALLI LIMESTONE MINES INTRODUCTION Takkallapalli Limestone Mines is a captive limestone mine of M/s. Kesoram Cement, which is located in Palakurthi Mandal of Peddapalli District,Telangana. The lease holds area on date of this Mine is 122.28 hects.Effect of layer thickness of rocks on blast fragmentation,fragment size, powder factor and charge factor. 2. Case study The study was conducted in Aditya Limestone Mines of UltraTech Cements Limited, Aditya Cement Works, Shambhupura, Chittorgarh, Rajasthan. The limestone deposit in the mine belongs to Nimbahera limestone formation where limestone, shale and clay are the major rock type (Parihar and

  • Assessment of Rock Strength Factor and Prediction of

    Feb 09, 2021· Up to10%cash back· BI, rock strength factor, blasthole parameters, powder factor, fragment size distribution of blasted rock and in-situ block size distribution using image analysis technique were assessed in 15 zones of Sungun open pit copper mine, Angouran lead and zinc open pit mine, Bonab silica mine, Soufian limestone mine and Rashakan 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. This system is called a powder factor design approach, and it is an extremely poor approach to designing a blast.

  • H BLASTING IN SURFACE EXCAVATION Mining and Blasting

    Limestone Shale 0.30 8 9 Very soft (-50) Coal 0.15 0.25 6 Example: A quarry is planned to be working on a rock of Andesite with an estimated production of about 120,000 tonnes per month. What is the estimated requirement of explosives per month? Assume that the SG of Andesite is 2.7 and the powder factor for andesite is 0.7 kg/m3.Chapter 8 BLAST DESIGN NPS,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: 1.5 tons = PF of 6.25lbs BURDEN-SPACING CALCULATION From

  • Krishikosh: ANALYSIS OF POWDER FACTOR IN LIMESTONE MINE

    Keywords ANALYSIS, POWDER, FACTOR, LIMESTONE, MINE A CASE, STUDY . Theme POWDER FACTOR LIMESTONE MINE . Research Problem ANALYSIS OF POWDER FACTOR IN LIMESTONE MINE A CASE STUDY . Theses Type M.Tech. Abstract . In hard rock excavations, drilling and blasting is the cheapest method of rock breaking and it is widely Limestone and Crushed Rock Energy,purposes of this report, limestone will be used as a sample for crushed rock. One product of limestone mining is lime. A wide range of industries use lime for a myriad of uses. It is used in many of the products and materials Americans use every day, including paper, steel, sugar, plastics, paint, and many more. The largest single use of

  • BASANTNAGAR LIMESTONE MINES

    Basantnagar Limestone Mines is a captive limestone mine of M/s. Kesoram Cement, which is located in Palakurthi Mandal of Peddapalli District, Telangana. The lease to 25% is used to boost entire column of explosive with powder factor 8.0 to 8.5 Tonnes/Kg of Explosive. 03. LEVELING BY DOZER After blasting, blasted material will be dozed atBASANTNAGAR LIMESTONE MINES,Basantnagar Limestone Mines is a captive limestone mine of M/s. Kesoram Cement, which is located in Palakurthi Mandal of Peddapalli District,Telangana. The lease to 25% is used to boost entire column of explosive with powder factor 8.0 to 8.5 Tonnes/Kg of Explosive. 03. LEVELING BY DOZER After blasting, blasted material will be dozed at

  • Journal of Mines, Metals and Fuels

    The powder factor more than 14 t/kg was achieved with layer thickness less than 200 cm. However, in geologically disturbed limestone strata, Blasting Material Used For Mining Of Limestone Is,Powder Factor Limestone Mines Reklamni Material. The cyclone is widely used inc losed-circuit grinding system of chinese black, colored, non-metallic minesslurry dewatering, removing mud, micro-fine material grading,and tailings filling,dams,recycling and other process.As the cyclone is high classification efficiency, simple structure, large capacity, small footprint, etc., so it is widely

  • ASSESSMENT OF POWDER FACTOR IN SURFACE BENCH

    powder factor. 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.H BLASTING IN SURFACE EXCAVATION Mining and Blasting,Limestone Shale 0.30 8 9 Very soft (-50) Coal 0.15 0.25 6 Example: A quarry is planned to be working on a rock of Andesite with an estimated production of about 120,000 tonnes per month. What is the estimated requirement of explosives per month? Assume that the SG of Andesite is 2.7 and the powder factor for andesite is 0.7 kg/m3.

  • Explosives Engineers’ Guide Dyno Nobel

    Powder factor = 0.5kg 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 = 1.25 x Spacing Fire as many holes as possible on one delay. Stem holes. Powder factors Typical powder factorsEffect of layer thickness of rocks on blast fragmentation,fragment size, powder factor and charge factor. 2. Case study The study was conducted in Aditya Limestone Mines of UltraTech Cements Limited, Aditya Cement Works, Shambhupura, Chittorgarh, Rajasthan. The limestone deposit in the mine belongs to Nimbahera limestone formation where limestone, shale and clay are the major rock type (Parihar and

  • (PDF) OPTIMUM POWDER FACTOR SELECTION IN BLAST HOLES

    Results of the study, therefore, showed that the company's quarry has limestone of medium strength range of 30Mpa-50Mpa which requires a powder factor of between 0.4kg/m 3 and 0.6kg/m 3 or 0.22kgLimestone Mining Michigan State University,LIMESTONE MINING Calcite and dolomite, when heated and in some cases slurried or combined with salt, are used in making many everyday products such as paper, glass, paint and varnish, soap and detergents, textiles, refractories, baking powder, and pharmaceuticals, including milk of magnesia and bicarbonate of soda.

  • The Powder Factor Dilemma iRing

    In surface mining operations, the weight of explosive used per unit volume of rock blasted is measured in pounds per cubic yard) lb/yd 3) (kg/m 3) to produce broken material is defined as powder factor.However, in underground mining operations the preference is to define powder factor as the weight of explosive required per unit of weight of rock to fragment either a metric Journal of Mines, Metals and Fuels,Jun 01, 2017· The powder factor more than 14 t/kg was achieved with layer thickness less than 200 cm. However, in geologically disturbed limestone strata, blast design patterns and joint parameters had significance in achieving desired fragment size.

  • Assessment of Rock Strength Factor and Prediction of

    Feb 09, 2021· BI, rock strength factor, blasthole parameters, powder factor, fragment size distribution of blasted rock and in-situ block size distribution using image analysis technique were assessed in 15 zones of Sungun open pit copper mine, Angouran lead and zinc open pit mine, Bonab silica mine, Soufian limestone mine and Rashakan limestone mine.A case study on improvement of powder factor and,Observed flyrock distances for 47 blasts at six limestone quarries along with blast design parameters are presented. The influence of blasthole

  • The Powder Factor Dilemma iRing

    In surface mining operations, the weight of explosive used per unit volume of rock blasted is measured in pounds per cubic yard) lb/yd 3) (kg/m 3) to produce broken material is defined as powder factor.However, in underground mining operations the preference is to define powder factor as the weight of explosive required per unit of weight of rock to fragment either a metric February 2021 1 The Indian Mining & Engineering Journal,25. Analysis of Powder Factor in Limestone Mine- A Case Study Hemant Sukhwal & Dr. S. C. Jain 31. Assessment of Liquefaction Potential on Cemented Paste Backfill P Gunupuram, S Panchal & S Sharma theimejournal Publisher Anita Pradhan Editor-in-Chief Prof.(Dr.) S.Jayanthu, Deptt. of Mining, NIT, Rourkela Technical Editor (Hony.)

  • Powder Factor McCallum Rock Drilling

    Jul 16, 2018· Powder factor is expressed in many different forms. Essentially it is a measurement of explosives per quantity of rock. The typical variation of this that we use on a daily basis is how many pounds of explosives per cubic yard of rock. This gives us a baseline of how we need to go about fragmenting rock for each particular application.Limestone extraction underground mining techniques,Surface limestone mining. All over the world, the limestones are generally mined from a quarry or the open pit mining. It is the easiest way to remove the limestone without causing much destruction. In surface mining or open pit mining, the top soil and the overburden covering the mineral is removed. Then by the process of drilling the rocks or

  • Blasting Safety Revisiting Site Security

    • Blasting experience of the mine, • Delay systems, powder factor, and pounds per delay, • Type and amount of explosive material, and • Type and amount of stemming. The Federal Office of Surface Mining (OSM) regulations [30 CFR § 816.67 and 817.67] help toTechnical Note on The Prediction and Control of ISRMTT,quarries, Adhikari (1999) has used 0.45 kg/m 3 as the optimum powder factor and concluded that flyrock distance would be less than 60 m when ratio between the powder factor and optimum powder factor is less than or equal to 1.15. Based on observations from several case studies of construction blasting, Tripathy et al. (1999)

  • Calculating powder factor from underground mine data

    Jun 02, 2021· Clear cut explanation related to powder factor calculation in underground mines using figures..BULK EMULSION EXPLOSIVE A CASE STUDY MADEN,In a copper mine this resulted in a decreased powder factor and thereby less cost for the explosive. In a limestone quarry an expansion of the drilling pattern lowered the drilling cost and the change-over to Bulk Explosive made handling and storage more adventageous. The studies are made for a surface copper mine using

  • Effects of Rock Mass Conditions and Blasting Standard on

    Apr 16, 2015· Mine A Face 1 Mine A Face 2 Mine A Face 3 Mine A Face 4 Mine B Face 1 Mine B Face 2 Mine C Face 1 Mine D Face 1 Mine D Face 2 Mine D Face 3 Xp 50 (cm) 41.8 19.8 32.0 20.3 25.4 43.5 48.7 51.5 59.6 73.5 powder factor are different at different test sites. Here, it is assumed that the crack condition of rock mass has anFatal Accidents Due To Flyrock And Lack Of Blast Area,limestone mine an equipment operator was fatally injured while guarding access roads in a pickup truck. This paper briefly describes six representative fatalities due to flyrock and lack of blast area powder factor, and pounds per delay, • type and amount of explosive material, and

  • Optimization of flyrock and rock fragmentation in the

    In this study, an attempt has been made to design the effective factors on Tajareh limestone mine explosion [i.e., burden, blast-hole, spacing, hole length, sub-drilling, stemming, powder factor, charge in each delay and Geological Strength Index (GSI)] in order to reduce improper fragmentation and flyrock.,