final wall blasting in open pit mines

Techniques of Controlled Blasting

Dec 17 2009 0183 32 Pre-splitting Pre-splitting is the smooth blasting method in which cracks for the final contour are created by blasting prior to the drilling of the rest of the holes for the blast pattern This is an effective way of restricting back-break and ground vibration in large open pit quarry blasting...

Blasting damage in rock

the `tension fractures frequently observed in open pit and strip mine operations where poor blasting practices encourage pit wall instability McIntyre and Hagan 1976 report vertical cracks parallel to and up to 55 m behind newly created open pit mine faces where large multi-row blasts have been used...

Case Study Combined Production and Trim Blasting

Batu Hijau copper-gold open pit mine located in the West Nusa Tenggara province of Indonesia Batu Hijau is budgeted to produce 140 million pounds of copper and 140 000 ounces of gold in 2011 At the current levels of production the mine is expected to continue operating until 2023...

Optimization of Blasting Parameters in opencast Mines

Drilling and blasting are the major unit operations in opencast mining Inspite of the best efforts to introduce mechanization in the opencast mines blasting continue to dominate the production Therefore to cut down the cost of production optimal fragmentation from properly designed blasting...

Delay time optimization in blasting operations for

Aug 01 2011 0183 32 1 Introduction Xinqiao Mining Co Ltd has an open-pit mine with 4 million ton Pyrites production pa At present the final pit walls with about 200 m height have occurredAccording to the mining project the height of the slope will increase to 400 m or above when the open-pit mine will be closedPre-splitting blasting has almost not been adopted near the final pit walls during mining in...

Case Study Cost Reduction in Wall Control Blasting

The Placer Granny Smith Sunrise Dam open cut gold mine is located near Laverton WA Fig 1 Mining of the Sunrise orebody began in 1995 and is currently mining in fresh volcanics and banded iron formations For maximum profitability the development of the pit requires strict wall control blasting...

FINAL WALL STABILITY IN METAL OPEN PIT MINES USING

Stability Final wall Presplit Drilling Blasting Open pit INTRODUCTION Estimating the safe wall angles of mines is necessary to calculate ore-to-waste ratios during the feasibility studies for designing an open pit mine During the feasibility studies a great deal of effort is...

Predicting Blast

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...

PDF Final Wall Stability in Metal Open Pit Mines Using

Implementing stable final pit walls in open pit mines during the open pit design phase and mine exploitation has become one of the most important concerns of mining engineers in recent years Failure of mine walls can potentially cause loss of life roads blocks and damage to mining machinery temporarily or permanently halt production at the face and in the worst case scenario close the mine...

Final Wall Stability in Metal Open Pit Mines Using

Thus the role of creating stable mine walls is crucial to safety and general operations of mines and any effort to optimize this process has great economic value for mine operators This paper aims to illustrate the technical aspects of use of the successful presplit blasting method in metal open pit min...

STORRE Final Wall Stability in Metal Open Pit Mines Using

Oraee K Mozafari A Goodarzi A Oraee-Mirzamani N 2013 Final Wall Stability in Metal Open Pit Mines Using Presplit Blasting In 23rd World Mining Congress 2013 Proceedings 23rd World Mining Congress - Mapping the Future Advances in Mining Engineering Montreal Canada 11082013-15082013 Montreal X-CD Technologies Inc Issue Date...

WALL CONTROL BLASTING TECHNIQUES by Partha D Sharma

Feb 25 2011 0183 32 In fact failure to properly control blasting at the final pit wall can cost a large open pit mine many millions of dollars expenses in additional waste removal for the same ore mined...

Final Wall Stability In Metal Open Pit Mines Using

Request PDF Final Wall Stability In Metal Open Pit Mines Using Presplit Blasting Implementing stable final pit walls in open pit mines during the open pit designing phase and mine exploitation...

PDF Wall Control Blasting Practices at Kısladag Gold Mine

This paper presents the final wall blasting practices at Eldorado Kisladag Gold Mine in Turkey A Systematic Geotechnical Mapping Method for Underground and Open Pit Min 7th Australia -New...

Final Blast in an Open Pit Mine

Jun 26 2017 0183 32 This shows the Goodbye Cut the final blast in an Open Pit mine In the slow motion section the detonate cord sequence flashes can be clearly seen...

Highwall concerns Pit Quarry

Jun 09 2015 0183 32 Some measures of consideration in the GCP should include geological structures and their influence on wall stability strength of the rock mass rain or water inflow issues surface drainage mine dewatering procedures geometry of the pit pit wall stability and appropriate drilling and blasting procedures for final walls...

PROCEDURES FOR BLASTING

the proposed blasting operations Final approval to blast will be granted based upon the results of the meeting Test blasts may be required and may result in modifications to the blast plan All blasts on Department contracts will be documented by the Engineer using the Blasting Report...

A better way to presplit

As the stability of the rock in an open pit mine determines the slope angle and stability can vary from area to area the resultin-g slope angles for the pit wall are not always in round figur They could be 18 23 or 275 degrees which is why a presplit rig must be very versatile...

New digital blasting technology Australasian Mine Safety

This wireless network communicates with a digital blasting system located a few kilometres away from the blasting zone and is controlled by a wireless communication protocol specifically developed and optimized to ensure safe reliable and synchronised operation of hundreds of detonating elements in open pit min...

A REVIEW OF THE DESIGN CRITERIA AND PRACTICAL

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...

Delay time optimization in blasting operations for

Blasting induced vibration is one of the fundamental problems in the open-pit mines and intense vibration can cause critical damage to structures and plants nearby the open-pit mines especially to the final pit wall s stability...

Paper Blast induced damage mechanism on final walls and

Abstract At most open pit mines profitability is affected appreciably by the final slope angles of the pit Steep stable and safe pit walls can be formed by accurate final wall drilling and blasting techniqu The violence of the blasting process both leaves damaged surfaces that must be made safe and breaking beyond the desired limit will increase mining costs...

Wall Control Blasting in Open Pits

Presplit and trim blasting are two control blasting techniques used to accomplish this Both techniques are designed to create a low explosive energy concentration per unit of wall area at the perimeter of the pit Energy concentration of the main production blast must also be controlled to avoid damaging the final pit wall...

ECONOMIC ASSESSMENT AND MINE PRODUCTION

development will be addressed including but not limited to the open-pit design production rate tailing facility construction haul road construction blasting design and material handling equipment selection The present study is intended to develop the economic assessment and mine production...

WALL CONTROL BLASTING TECHNIQUES by Partha D Sharma

Feb 25 2011 0183 32 WALL CONTROL BLASTING TECHNIQUES ----- ii Presplitting - Presplitting is the most common controlled blasting technique and has proven successful in applications from large open pit mines...

PAPER OPEN ACCESS Pit wall stability and drilling

Pit wall stability and drilling-and-blasting SN Zharikov Institute of Mining Ural Branch Russian Academy of Sciences Yekaterinburg Russia E-mail 333vista mail Abstract The author describes discipline of wall control blasting in open pit mining The...

Surface mining planning and design of open pit mining

Jan 09 2016 0183 32 Basic Concept 12 Open pit Mining method 13 Bench 14 Open Pit Bench Terminology 15 Bench height 16 Cutoff grade 17 Open Pit Stability i Pit slope ii Pit wall stability iii Rock strength iv Pit Depth v Pit diameter vi Water Damage vii Strip Ratio SR 18 Open-pit mining sequence 19 Various open-pit and orebody...