Chapter 8 BLAST DESIGN

2014-6-11 · Improved production rates and consequent cost reduction in digging, hauling, crushing, or moving rock are the major benefits obtained from the efficient application of explosive energy. There are other benefits from better fragmentation, such as reduced secondary blasting, reduced power consumption at the crusher, and less

Rock Boulder Crushers

2017-7-23 · The crusher employed for the initial size reduction will have a maximum size rock capacity, and when any oversized rock is delivered, it lodges in the crusher and the materials flow in the mine or quarry is halted. Whenever rock passes through …

Fragmentation Analysis

Fragmentation AI Screen . Detect Rock Size. Switches on an off the rock boundaries detected by the AI. These are visualised as lines on the map. Particle Size Colour. Switches on and off the coloration of rocks based on their relative size. The rock colors are visualized on the map according to the legend in the side bar. Show all/none

BLAST FRAGMENTATION OPTIMIZATION AT TARKWA …

2009-10-15 · The objective was to improve fragmentation in order to achieve a constant throughput to the north heap leach crusher of 1500 t/hr, a 5% increase in pit loading efficiency and a 50% decrease in rock breaker hours, equipment damage costs and in-pit sheeting costs respectively.

CONE

2015-5-18 · The crusher model takes the fragmentation behaviour of the rock and feed size distribution into consideration. Moreover, chamber and machine geometry together with machine parameters such as closed side setting, stroke and eccentric speed, is accounted for. On …

BLAST FRAGMENTATION OPTIMIZATION AT TARKWA …

2009-10-15 · improve the fragmentation. A defect was defined as a fragmentation analysis indicating less than 95% passing 750mm. The objective was to improve fragmentation in order to achieve a constant throughput to the north heap leach crusher of 1500 t/hr, a 5% increase in pit loading efficiency and a 50% decrease in rock breaker hours, equipment

2012G

2021-4-20 · Ravena NY Cement facility. The quarry has one primary crusher (Superior MK-II 54-75 Gyratory Crusher). The blasted rock crushed at the primary is conveyed across the road to supply the cement plant and aggregate producer. The Lafarge Ravena NY quarry mines four (4) benches. In order of their elevation from

Meaning of p80 in crushing product

Meaning of p80 in crushing product Products. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including, Meaning of p80 in crushing product, quarry, aggregate, and different kinds of minerals.

Measurement of Size Distribution of Blasted Rock Using ...

2010-2-2 · Abstract. The purpose of this study is to measure the size distribution of blasted rock using the digital image processing software "Split-Desktop system" in order to evaluate the efficiency of blasting operation. Site of study is a limestone quarry producing limestone for cement manufacturing. Fragmentation is the ultimate measure of efficiency of any production blasting operations. The degree of fragmentation plays an important role in order to control and minimize the loading, hauling, and crushing …

Nature of Rock Fragmentation Process in Crushing Operation ...

2015-5-10 · Understanding fragmentation behaviour of rock under crushing process is fundamental to improved productivity and efficiency in mining operations. This is particularly so as all subsequent size reduction processes such as crushing and grinding are far more energy intensive than the initial blasting process employed in breaking of in situ rock.

Blast fragmentation measurements in open pits ...

2017-8-31 · "Further rock fragmentation measurement located on the crusher discharge conveyor offers advantages and presents different but important data. Firstly, installation on a fixed conveyor is simpler and more reliable than applications in the pit or at the crusher…

v117n4a2 An investigation into the fragmentation of ...

2017-5-2 · The crusher product should have a top sizeof 50 mm. A blast fragmentation of <50 mmwould improve the downstream operationsand the crusher throughput. An investigation into the blasting practiseswas carried out to assess whether thedownstream delays can be eliminated byimproving the blast results. The exerciseincluded:

Understanding the impact of geotechnical ore properties ...

2021-8-15 · The rock fragmentation parameter, Rock Quality Designation (RQD), mainly impacts the coarser end of ROM size distribution; as the primary crusher breaks those coarser particles, no significant RQD effect on the plant throughput and the Size Specific Energy was observed.

Artificial neural network approach to predict blast ...

2020-10-28 · Rock fragmentation is a fundamental mining activity that affects the downstream processes; hence, there is a need of optimizing fragmentation. Optimizing rock fragmentation results in (i) maximizing crusher throughput; (ii) improving excavator productivity; (iii) minimizing equipment (i.e. excavator and crusher) maintenance and

UTILIZING BASIC STATISTICAL ANALYSIS AND …

2013-11-13 · The relationship indicates that fines are slowing the crusher at the lower powder factors (more lbs of explosive per ton of rock) and also at the higher powder factors with oversize. The optimum powder factor for crusher productivity appears to be at 2.0 to 2.1 tons/lb Basically the same relationship was found in a previous study done in 2007

Investigation of rock blast fragmentation based on ...

2021-8-20 · Monjezi et al. [27] developed a fuzzy logic model for prediction of rock fragmentation by blasting. Kulatilake et al. [28] presented a piece of work, predicting the mean particle size in rock blast fragmentation using neural networks. Also, Monjezi et al. [29] used neural networks to predict the rock blasting fragmentation.

(PDF) Target fragmentation for efficient loading and ...

Blast-induced fragmentation has a significant influence on the operational efficiency of open pit mines, especially on loading and crushing, the two immediate tasks after blasting. This study...

FRAGMENTATION Break it better

2018-7-3 · fragmentation data from an online system. The results can show a number of different things, but most importantly it tells the operator either: a) The crusher needs to be gapped on a more regular basis based on the increased fragmentation size b)The crusher is being gapped too often when it is not required, allowing for less downtime.

Case Study Improving Crusher Throughput from …

2012-8-23 · Notable improved rock fragmentation was achieved as a result of accelerated initiation timing using Uni tronicTM detonators. Analysis showed that primary crusher throughput of the Uni tronicTM section was 18.5% higher when compared to the standard non electric section. Analysis also showed that crusher

Rock Tests

2018-7-12 · Rock Tests Types of Tests UNRESTRICTED 2 •Tests on mechanical properties ... •Crusher type, crushing stage and ability for cubical products, 14 Machine Primary Secondary ...

fragmentation crusher rock

fragmentation crusher rock wembleyprimaryschool. Rock Fragmentation And Crushing Equipment Crusher Unit. Mobile Crusher Mobile crusher is a new rock crushing equipment crushing operations greatly expands the concept field It is designed to the customer s position to eliminate fragmentation site environmental work to customers crushing barriers as a primary solution and provide customers with a ...

Fragmentation Management for the Downstream Value …

2016-1-11 · Crusher Product. Energy $ Relative Energy and Costs. Specific energy kwh/t Energy factor Cost factor Drill and Blast 0.1 – 0.25 1 1 ... fragmentation performance of the rock mass. • Jointing/Bedding • Defines maximum fragment size • Influences transmission of stress wave

Blast fragmentation measurements in open pits – AMC ...

Further rock fragmentation measurement located on the crusher discharge conveyor offers advantages and presents different but important data. Firstly, installation on a fixed conveyor is simpler and more reliable than applications in the pit or at the crusher, …

Maximizing profits with fragmentation analysis

2020-8-17 · Fragmentation of rock – making rock small enough and loose enough to be efficiently excavated – is essential to mining and is the preparatory stage in the extraction process. Correct fragmentation means easier digging, reduced shovel cycle times, reduced rework, less oversize causing downtime at the crusher, lower cost crushing, and ...

VARI-STEM -

2021-8-27 · Fragmentation Size. DBA Consulting extended the MREL tests to provide quantifiable data on VARI-STEM® performance in Increasing Rock Fragmentation, Improving Crusher Throughput and Blast Control. DBA study showing Blast Data and Timed Photos. The study revealed our plugs slowed stemming movement 130%, directing the blast energy into the rock ...

PRELIMINARY ASSESSMENT OF THE EFFECTS OF BLAST …

of the rock. The higher the uniaxial compressive strength of rock, the higher the powder factor needed for a specified fragment size. In this study, spacing to burden ratio has a very weak correlation with the fragment size. All the studied blast events produced good fragmentation with a uniformity index varying from 2.097 to 2.525.

Rock Boulder Crushers

2017-7-23 · The crusher employed for the initial size reduction will have a maximum size rock capacity, and when any oversized rock is delivered, it lodges in the crusher and the materials flow in the mine or quarry is halted. Whenever rock passes through openings, there exists a …

A real-time analysis of rock fragmentation using UAV ...

2016-7-15 · A real-time analysis of rock fragmentation using UAV technology Bamford 1 2T., Esmaeili K., Schoellig A. P. 1 Lassonde Institute of Mining, University of Toronto, Toronto, Canada 2 University of Toronto Institute for Aerospace Studies, Toronto, Canada Abstract- Accurate measurement of blast-induced rock fragmentation is of great importance for many mining