International Symposium on Stability of Rock Slopes in Open Pit Mining and Civil Engineering André de Jager and Henk Ludik Page 515 Figure 5 Wave Interference Modeled for the EDD blast on 18 May 2005 The timing was designed to produce low vibration concentrations on the pit-wall sides of the blast
Optimization of Blasting Parameters in opencast Mines
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
Jun 09, 2015· There are several geological hazards that are encountered during the life of a quarry or open pit mine Most of these hazards are included in a mine’s Ground Control Plan (GCP) , pit wall stability; and appropriate drilling and blasting procedures for final walls , Early detection of wall failure allows mine operators to plan and .
THE TELLNES OPEN PIT MINE, NORWAY Bjørn Nilsen , - NTNU
THE TELLNES OPEN PIT MINE, NORWAY Bjørn Nilsen, Professor , 2 PIT WALL DESIGN The final pit slope at Tellnes has a bench height of 15 meters and a bench for every 30 , blasting, and before the final wall was established Still, incidents like these illustrate
The Evolution of Wall Control Programs at Kidston Gold Mines
Concerns with crest losses have seen changes to a number of design and operating parameters to retain the integrity of the wall and the berms of the Kidston Gold Mines’ Eldridge Pit Until trials began in 1999 most final wall designs utilised large diameter blastholes up to the presplit row to achieve the wall angle
International Symposium on Stability of Rock Slopes in Open Pit Mining and Civil Engineering Simon St J Tose _____ Page 526 When modified production blasts cause too much damage on final walls, perimeter blasting methods need to be used The best perimeter blasting results can be achieved in tough massive rocks In
How Stemming Works in Open Pit Blasting: Part 1 - YouTube
Mar 26, 2014· A short video describing the concept of stemming of bore holes in surface mining and how its works from the shock wave dynamics perspective , How Stemming Works in Open Pit Blasting: Part 1 .
Limiting Blast-induced Damage On Final Pit Walls | Agg-Net
However, it is avoidable with the correct design and application of blasting at the final pit wall This paper presents some blasting methods for achieving better final walls TRIM BLASTING The two areas that have the greatest impact on blast damage to the final wall are pre-splitting and trim blasting
Predicting Blast-Induced Damage for Open Pit Mines Using ,
Blasting is the most common method used to fragment rock in the mining industry However, given the violent nature of explosives and the high variability of results that can occur from blast to blast, there is potential to cause significant damage to the final walls of an open pit, which can
Blasthole Drilling & Open Pit mining - 59 Blasting in open cut metal min 69 Fuel saving clutch , 141 Steep wall open pit mining at Zhelezny – Iron/Russia 145 Mining industry's , forefront of blasthole drill automation with our proven Rig Control System
Analysis of Safety Aspects And Mining Practices For ,
decreasing the pit width and lowering the overall slope angle by use of a spoil bench Mining Practice Controlled blasting methods are commonly used in Australian mines (6) to maintain pit wall stability The methods include cushion blasting, pre-splitting, post-splitting, and using them with production blasts
Singh has made notable contributions in Explosives Science and Blasting Technologies to solve practical problems in the mining industry encompassing the fields of optimal use of explosives energy in rock fragmentation, explosives energy partitioning, blast vibrations, wall-control, fragmentation control, blast design in mines and tunnels, pre .
Appendix E6 - Canadian Environmental Assessment Agency
Appendix E6 Open Pit – Drilling and Blasting 1 | P a g e Memo , Mitchell pit in the KSM project will have an extremely high engineered pit wall and as such, , The blasting crew will be provided by the mine and will be a daytime only shift, 7 days per week Based on existing mines of similar size, previous experience and the layout of the
Geotechnical considerations open pit audit – guide Page 2 of 28 Introduction This document was reformatted in November 2015 At this time no material changes were made to the content of the guide, which was originally published in September 2009 under the title Guide to open pit geotechnical considerations HIF audit 2009
In normal blasting all holes do not blast at the same time Bench blasting is normally carried out as short delay blasting The firing pattern has to be designed so that each blasthole has free breakage The firing sequence of a chevron pattern can radically alter the drilled burden and spacing into the blasted or effective burden (Be)
ESTIMATING THE EFFECTS OF BLASTING VIBRATIONS ON ,
ESTIMATING THE EFFECTS OF BLASTING VIBRATIONS ON THE HIGH-WALL STABILITY The stability of the high-walls is one of the major concerns for open pit min Among the various factors affecting the stability of high-walls, blast vibrations can be an important one In general, worldwide the established respective government regulations and industry
International Journal of Science &Technology, Reference ,
mines Nchanga Open Pit mines are located in Chingola, in the Copperbelt province of Zambia Open Pit mining at Nchanga started in 1938, in the main Nchanga Open Pit More than a decade ago, Nchanga Open Pit was the largest base metals open cut in the world It is still among the top five largest open cuts in the world The mine’s core
Geotechnical Considerations in Open Pit Mines Version 10 Department of Minerals and Energy Page 1 of 49 CONTENTS , the operation of the mine, to the final closure and abandonment of the mine The design of , eg production and near-wall blasting, *
Open-pit mining is to be considered one of the most dangerous sectors in the industrial world It causes significant effects to miners health, as well as damage to the ecological land Open-pit mining causes changes to vegetation, soil, and bedrock, which ultimately contributes to changes in surface hydrology, groundwater levels, and flow paths
Design of controlled blasting (pre-splitting) in Golegohar ,
surface between the main blasting pattern and open pit final walls In this study, a large open pit mine was the case study for the goal of designing pre-splitting through implementation of direct and cost effective experiments Three tests were designed and performed at the mine Back-
Final Wall Stability in Metal Open Pit Mines Using ,
Importance of presplit drilling and blasting in open pit min slope stability study is one of the most considerable parameter for safety and economical factors of open pit min failure of mines’ walls can potentially cause loss of lives, roads blocking, damaging to mining machinery, temporarily or permanently halt production and in the worst case scenario closing the mine
final wall blasting in open pit mines - oalebakkershonl
the mine has a powerful tool for efficiency and optimization of the whole mining operation , to a world-class Blast Master Plan at Ellatzite Med copper mine, the largest open pit operation in , Wall control blasts are improving final wall quality
Final Wall Stability in Metal Open Pit Mines Using Importance of presplit drilling and blasting in open pit min slope stability study is one of the most considerable parameter for safety and economical factors of open pit min failure of mines' walls can potentially cause loss of lives, roads blocking, damaging to mining machinery, temporarily or permanently halt production and in the .
Wall Control Blasting Techniques; Modification of Blasting Techniques as per Geological Conditions of Strata; Environmental Impacts of Mining; ACID DRAINAGE FROM MINES AND ITS RELATED PROBLEMS; Blast Fragmentation Appraisal-Means to Improve Cost Effectiveness in Mines; Cost effectiveness of open-pit hard rock Ore Mining
drilling and blasting operations in the field Mine planners and engineers will also find this course to be of real value in terms of gaining an understanding of the effects that blasting can have on the in situ geological structure adjacent to the pit and hence on the stability of the final pit wall The course will also feature blast
FINAL WALL STABILITY IN METAL OPEN PIT MINES USING ,
presplit blasting The latter technique has become the most widely used in metal open pit mines, due to good results and its operational nature in hard rock formation PRESPLIT BLASTING Presplit blasting is an effective technique for stabilizing the final wall in open pit metal min
Improved Blasting and Bench Slope Design at the Aitik Mine
Improved Blasting and Bench Slope Design at the Aitik Mine P-I Marklund Boliden Mineral AB, Sweden J Sjöberg Vattenfall Power Consultant AB, Sweden F Ouchterlony Swebrec at Luleå University of Technology, Sweden N Nilsson Nitro Consult AB, Sweden Abstract The Aitik open pit mine, located in northern Sweden, currently faces a substantial production increase.
Blasting near open pit walls - University of Western Australia
Blasting near open pit walls , a particular focus on presenting a thought process aimed at trying to avoid unnecessary and ineffective restrictions on mining practices and wall control blasting Practices such as reduced blasthole diameter, pre-splitting, trim blasting, initiation sequences and systems and reduced blast size will be explored .