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Automated Blast Hole Volume Analysis

May 07, 2021· A more accurate shot volume calculation that allows users to optimize shot designs to achieve more even powder factor across the bench. Home; Subscribe. 7 May 2021 / data ... blasting, mining, and aggregates industries, empowering them in ways never before possible. Make sure you are taking advantage of the best tools available.

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methods to blast rock in quarry

Apr 17, &#; Read about the true influence rock strength, rock structure, velocity and powder factor have on a quarry blast's effectiveness, These are just a sampling of the different ways powder factor can vary on a blast, and the powder factor for a surface blast will typically be stated as between 05 and 20 pounds per cu yd, which is a wide.

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Drilling - MiningInfo

Mining news and job postings, mining and mineral processing technology including drilling, blasting, mining methods, equipment, backfill ... (powder factor), Fragmentation; ... the end-product, with a focus on factors such as cubicity and minimised amounts of micro-cracking (in the case of aggregate quarries). Mechanics of Rock Drilling

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Fragmentation - MiningInfo

Fragmentation. Rock properties, explosive properties, and design variables are combined using five underlying equations in this modern version of the Kuz-Ram fragmentation model. Breakage theory ( Kuznetsov, 1973 ): The amount of breakage that occurs with a known amount of explosive energy can be estimated using Kuznetsov's equation.

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Bulk Density Chart - Anval

Chicory (Powder) 30 481 Chilli Spice 45 721 Chlorine Compound 28 449 Chlorine Powder 36 577 Chocolate Drink Mix 26 417 Chromic Acid Powder 100 1602 Cinders, Blast Furnace 57 913 Cinders, Coal, Ashes & Clinker 40 641 Cinnamon Powder 35 561 Citric Acid 48 769 Clay 50 801 Clay (Bentonite) 50 801 Clay (Calcined) 30 481

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Determination of the Braking Factor in Bench Blasting for ...

In aggregate quarry, series of work have been done on powder factor that gives economical blasting. In this research, breaking factor is used in place of powder factor since breaking is required not powder. The aim of this research is to establish a standard breaking factor for bench blasting in dimension quarries that will improve recovery.

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Australia, Pacific & Asia ... - Orica Mining Services

good quality well graded aggregate between explosive decks Decking using drill cuttings or with less than 30 x hole diameter between explosive decks : ... Powder factor, 0.5-0.9kg/bcm or . Energy factor, 1.3-2.3.MJ/bcm : Powder factor, >0.9kg/bcm or . Energy factor, >2.3MJ/bcm : Multiple Priming .

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Study on optimum powder factor and quality of explosives ...

Bulk explosives, booster and blast design play an important role in rock blasting. Bulk explosives are booster sensitive explosives. The firing density is in range of 1.05 to 1.20/cm3. The velocity of detonation and absolute weight strength (AWS) is in range of 3500 to 4500m/s and 800 to 850kcal/kg. Powder factor is an important economic index for assessment of blastabiliy of rock.

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(PDF) Drilling and blasting improvement in aggregate ...

Drilling and blasting accounts for 28% of total quarrying cost based on the study of various aggregate quarries in Thailand. Powder factor values (P.F.) …

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Aggregate Size Optimisation Program at the Lafarge ...

Blasting powder factor (kg/m3) was the main control variable utilised to increase crusher throughput. In 2005, the program was refined to increase the production of certain high margin aggregate sizes and the reduction of fines.

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Particulate Matter (PM) Emission Factors For Processes ...

For unique emission sources, additional data must be used in determining the factor (EF or TP) before it can be used in emission calculation as discussed in the following notes: Note 1: For mining/quarrying, emission factor is expressed in pound per blast (lbs. /blast) and is calculated as: EF 0.000014u A1.5

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Determining minimum burdens for quarry blasting

The use of Power Factor in blast design Using the rock type the designer can select the Powder Factor range suitable for the quarry. The face profiles will identify reduced burdens. Table below relates the explosives loading rate and the reduced burden to the expected 'In-Hole' Powder Factor (for a one metre section of 110mm diameter borehole)

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Quarry Drilling & Blasting | McCallum Rock Drilling

By definition, flyrock is debris that is propelled outside of the blast zone. Shot design, powder factor, stemming material, delay sequence, and blasting mats are all factors considered to control flyrock. Every blast we design and shoot uses proper …

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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 …

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(PPT) MINIMIZATION OF BOULDERS DURING BLASTING AT …

PARAMETERS'NAM CURRENTLY CALCULATED UNITS E PARAMETERS PARAMETERS Burden 3.0 2.28 m Spacing 4.0 2.83 m Sub-drill 0.5 0.68 m Stemming height, h 3.5 2.28 m Bench height 6.5 6.32 m Hole diameter 76 76 mm Hole depth 7 7 m Powder factor 0.92 0.85 unitless Stemming material 6-10 mm aggregates Loam and Clay soil Since the parameters used at …

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AMIT 135: Lesson 1 Introduction – Mining Mill Operator ...

Today, aggregates are produced in every state, and aggregates production tonnage ranks first in the non-fuel minerals industry. More than two billion tons of aggregates are used annually in the United States. This equals ten tons of aggregates for every American! Aggregate pile [image 135-1-5] Barrick Gold mine [image 132-1-5.2]

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blast pattern – Mining and Blasting

Oct 12, 2012· POWDER FACTOR. In construction blasting, powder factor (PF) is expressed as quantity (unit mass) of explosive per unit volume of material blasted. For mining, it is usually expressed as quantity of explosive per ton of material (or sometimes tons of material per unit mass of explosive). Fig – 5.

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(PDF) Determination of Powder Factor for an Optimize d ...

PDF | On Sep 16, 2007, Hossein Nezamabadi-pour and others published Determination of Powder Factor for an Optimize d Blast Pattern Design Using Artificial Neural Network (Case Study: Gol-e-Gohar ...

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Powder Factor|Detonator Factor|Blasting Engineering|MINING ...

Jun 23, 2020· In this video i discussed about powder factor and detonator factor from the video you can knowWhat is PF and DF ?PF and DF depends on which factor's..?Indian...

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Final Report - Fatality #3 - March 22, 2016 | Mine Safety ...

Mar 22, 2016· MAI-2016-03 UNITED STATES DEPARTMENT OF LABOR MINE SAFETY AND HEALTH ADMINISTRATION Metal and Nonmetal Mine Safety and Health REPORT OF INVESTIGATION Surface Nonmetal Mine Limestone (crushed and broken) Explosives and Breaking Agents March 22, 2016 Martin Marietta Materials Plant 862 Earlham, Madison …

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Optimization of Blast Design for Quarries -A Case Study of ...

factor that ranges between 0.625 – 0750kg/m2.However, when the blasting data was optimized using Langefor and Khilstrom model, the optimized data proposed values that range between 2.27 – 3.57 m and 2.79 – 4.39 m as burden and spacing respectively. The optimized pattern resulted in a constant powder factor of 0.417 kg/m3

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How is blasting powder factor calculated?

May 24, 2020· Powder factor = 0.5kg per square metre of face. Simply so, what is charge factor in blasting? blast design, blasting, surface mining. 1 INTRODUCTION. The specific charge (powder factor) is a measure of the mass of an explosive required. to break a unit volume or a unit mass of the rock. What is burden in blasting?

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Distribution Analysis of Rock Fragments Size Based on the ...

Powder Factor, kg/t 0,19 Charge Weight per hole (kg/hole) 117,59 124,15 Rock volume broken per blast hole (m3) 257,4 In this study, rock factor representing the rock mass properties of a quarry was determined indirectly by the resultant fragmentation of the blasting operation carried out by using the specified blast design parameters.

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Optimization of Blasting Parameters in opencast Mines

Powder factor (desired), iii. Cost of explosive, iv. ... Mining industry is the backbone for the development of any nation. In mining the basic aim is to ... aggregate cost of drilling and blasting is taken together, this may go as high as 30% of direct cost of production. Therefore to cut down the cost of production optimal fragmentation from ...

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BULK MATERIAL DENSITY TABLE - Tapco, Inc

Baking Brick,Powder 40-55 Baking (SodiumSoda Brick,Bicarbonate) 40-55 Barite (Barium Sulfate) +1/2" 120-180 Barite, Powder 120-180 Barium Calcine,Carbonate 72 Material Description Loose Bulk Density #/Ft. Bark, Wood, Refuse 10-20 Barley, Fine, Ground 24-38 Barley, Malted 31 Barley, Meal 28 Barley, Scoured 41 Barley, Whole 36-48 Basalt 80-105 ...

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MSHA blast fatality report • Aggregate Research International

Sep 02, 2016· MSHA blast fatality report. 2nd September 2016. 2nd September 2016. Tracy L Hockemeier, leadman, age 42, was fatally injured on March 22, 2016, when he was struck by fly rock during blasting operations at Martin Marietta Materials plant in Earlham, Madison County, Iowa. Hockemeier was sitting in a pickup truck, approximately 1,200 feet from the ...

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Impact of Blast Design Parameters on Blasted Muckpile ...

Oct 28, 2018· 3.5 Influence of powder factor on muckpile properties. Due to variations made in values of spacing, burden, stemming and bench height, powder factor and geological conditions, values of powder factor moved from 0.79 kg/cum to 1.21 kg/cum. Relation between powder factor and muck properties are as shown in Figure 18, 19, and 20.

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Investigation of Crushed Aggregate as Stemming Material in ...

Jul 12, 2015· The drill cuttings and crushed aggregates were used as stemming material (as shown in Fig. 1a, b) for conducting the trial blasts. The blast trials have been conducted in a lead–zinc mine, on the top overburden rock formations (Fig. 2a, b). The geology of the mine entailed a stratiform, sediment-hosted lead–zinc deposit that occurred in pre-Cambrian …

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mining – Mining and Blasting

Jun 14, 2018· POWDER FACTOR. In construction blasting, powder factor (PF) is expressed as quantity (unit mass) of explosive per unit volume of material blasted. For mining, it is usually expressed as quantity of explosive per ton of material (or sometimes tons of material per unit mass of explosive). Fig – 5

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Powder Mixing Challenges and How to Overcome Them ...

Oct 01, 2019· Powder Mixing Challenges and How to Overcome Them. Oct 01, 2019. Mixing of powder and granular materials is key for the quality and performance of a wide range of products in many processes in the food, pharmaceutical, paper, plastics, and rubber industries. For a final product to comply with required attributes, three important features are ...

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Evaluation of blast efficiency in aggregate quarries ...

Mar 13, 2021· The most critical blast design parameter in quarry blasting is the powder factor because its value considerably affects the efficiency of the blasting. As the powder factor increases, the sizes of the resulting fragments are reduced. When a high value of powder factor is used in blasting, the sizes of the fragmentation distribution will become ...

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QA 10 25 2005 - USA Master - Quarry Management

Powder factor 0.67 kg/bm3 Back-break avg. 2.9 m Shotrock fragmentation d 90 = 300 mm Secondary crusher 1150 tph Crushing plant 30% power reduction Base Line 1997 Bench height 11 m Drill-hole diameter Ø200 mm Drill pattern 6 x 7 m2 ( rectangular ) Sub-drill 1.5 m Stemming 6.0 m ( 0 - 19 mm matr. ) Burden delay 25 ms/m Spacing delay 6.0 ms/m

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A novel powder factor based bench blast design method for ...

A NOVEL POWDER FACTOR BASED BENCH BLAST DESIGN METHOD FOR LARGE SURFACE COAL MINES by ANDREW CLIFFORD BLAIR A DISSERTATION Presented to the Graduate Faculty of the MISSOURI UNIVERSITY OF SCIENCE AND TECHNOLOGY In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY in MINING …

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