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Powder factor is the mass of explosive required to break one cubic meter of in-situ rock and expressed in FACTORS AFFECTING BLASTING PERFORMANCE Geology of an area -Physical rock properties, rock hardness and rock structure . Controllable and uncontrollable factor Drilling pattern Physical selection parameter Explosive Powder factor Delay time ...
Rocks with voids sometimes require large powder factors. For most typical tunnel blasting, the powder factor varies between 0.6 and 5 kg/m³. The powder factor can vary from 1 kg/m in a tunnel with an opening size greater than 30m² to more than 3 kg/m³ for a .
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 soft rock it was in range of 2.0to 3.m3/kg.
Chapter 8 BLAST DESIGN (Figure 8-2) Staggered pattern (Figure 8-3) Sing ... The higher the powder factor, the lighter the load. Lower powder factor means more explosives. Example: ... The economic analysis of the use of explosives is an important part of blasting operations in mining and construction. Explosives are energy, and the efficient ...
Review of surface coal mining emission factors. . Evaluation of current surface coal mining overburden handling techniques and reclamation practices. Final report
optimization of blasting parameters in opencast mines a thesis submitted in partial fulfillment of the requirements for the degree of bachelor of technology in mining engineering by manmit rout & chinmay kumar parida under the guidance of dr. h. b. sahu department of mining engineering national institute of technology rourkela-769008
Process Mining in Healthcare — A Systematised Literature Review Abstract: Process mining is a promising approach that turns event logs into valuable insights about processes. One domain amenable to process mining is healthcare, where an enormous amount of data is generated by care processes, but where realistic care models are seldom available.
literature review of powder factor in mining. In this light the present study was conducted in opencast coal mines to see the effect ... literature review of the powder basin, ... stone crusher coal mining; » More; the literature review on the impact of solid . This page is about the literature review on the impact of solid mineral ...
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The powder factor was determined locally by reference to similar bench blasting applications to the same minerals and rocks and the results were also compared with previous findings. Finally, a relationship between the Bond work index and the powder factor was established by the application of statistical and mathematical methods, taking into ...
described in the Australian or international mining or groundwater literature. Because there are no documented case studies to work from, a fundamental approach ... Trim blasts designed with adequate powder factor, three rows and large ... Impact of Blasting on Rock Mass Permeability vii ...
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 ENGINEERING 2015 .
In any discussion of Methods of Underground Mining Comparison, one is repeatedly confronted with the difficulty of dealing with so many variable conditions. It is not an exact science and in the choice of a method each varying factor has a certain weight, which, in many cases, experience alone can determine.
Definition of powder factor The quantity of explosive used per unit of rock blasted, measured in lb/yd 3 (kg/m 3 ) per ton (metric ton) of rock. Click here to see list of references, authorities, sources and geographical terms as used in this glossary.
Article publication and literature review is an integral part of an effective research work. It has been observed that there is a lack of comprehensive knowledge amongst the young budding ...
The concept is well known in underground mining scenarios and therefore this article highlights some MCF issues from a surface mine perspective using AngloGold Ashanti Iduapriem mine as a case study. The mine call factor (MCF) at AngloGold Ashanti .
iii Acknowledgements This research was accomplished with the financial support of the Centre for Excellence in Mining Innovation (CEMI). I would like to sincerely thank my supervisor, Dr. P.D. Katsabanis, for the guidance he has provided over
of the Mining Journal,, and many other members of the mining community, the Hard Rock Miner's Handbook has been distributed to over 113 countries worldwide. Web hits and downloads continue as students and professors, miners, engineers, and mining executives embrace the Handbook as an invaluable source of practical
Breakage and fragmentation modelling for underground production blasting applications I. Onederra Julius Kruttschnitt Mineral Research Centre -The University of Queensland, Australia ABSTRACT A review of breakage and fragmentation modelling literature has shown that only a few
Powder factor is the ratio between the amount of rock broken and total weight of explosive consumed. It is an important parameter in blast design and has a vital influence on the resultant fragmentation. Higher powder factor causes oversize and lower powder factor results in crushed rock.
The average powder factor during 2006 was approximately 0.24 kg/tonne. At the end of March 2007, the average powder factor was increased to 0.254 kg/tonne. The increase in the powder factor was made in an attempt to improve the diggabil-ity of the muckpiles for the LeTourneau loaders. However the results were not satisfactory.
Jun 01, 2014· Journal of Powder Metallurgy and Mining is an Open Access journal includes a wide range of fields in its discipline. Scholarly open access journal aims to publish most complete and reliable source of information on the discoveries and current developments in the mode of original articles, review articles, case reports, short communications.
Designing Blast Patterns Using Empirical Formulas A Comparison of Calculated Patterns With Plans Used in Quarrying Limestone and Dolomite, With Geologic Considerations By Joseph M. Pugliese Twin Cities Mining Research Center, Minneapolis, Minn . . US Department of Interior Office of Surface Mining Reclamation and Enforcement Kenneth K. Eltschlager
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