OneMine | Wall Control Blasting in Open Pits

The recent increase in size of open-pit mining operations has resulted in major improvements in efficiency that are beneficial to the mining industry. Higher bench heights, larger diameter blast-holes, and more powerful explosives have played an important part in reducing mining costs. These measures have, however, resulted in increased energy concentrations in the blast area, …

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Final Wall Stability in Metal Open Pit Mines Using Presplit Blasting …

Importance of presplit drilling and blasting in open pit mines slope stability study is one of the most considerable parameter for safety and economical factors of open pit mines. failure of mines' walls can potentially. ... Final Wall Stability in Metal Open Pit Mines Using Presplit Blasting Kazem Oraee. Ali Mozafari.

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Pre-Split Blast Design For Open-Pit And Underground Mines

SYNOPSIS:. Perimeter blasting techniques limit damage to the final walls of excavations. This is accomplished by lowering the explosive energy concentration of the excavation boundary. The most common method is pre-splitting which involves the formation of a crack coincident with the excavation boundary prior to firing the main blast. This crack serves as a vent for the explosive …

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Open Pit Mining

Open pit mining method is one of the surface mining methods that has a traditional cone-shaped excavation and is usually employed to exploit a near-surface, nonselective and low-grade zones deposits. It often results in high productivity and requires large capital investments, low operating costs, and good safety conditions. The main topics that will be discussed in this …

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International Journal of Rock Mechanics and Mining …

southeast slope of the final wall of the open-pit mine, extending from the bench at EL 690 m to the bench at EL 810 m, with a horizontal length of about 1 km and a vertical height of 120 m (Fig. 3).

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Design of controlled blasting (pre-splitting) in …

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

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Blast induced damage mechanism on final walls and the blasting …

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 techniques. 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.

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[PDF] Blast induced damage mechanism on final walls and the blasting …

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 techniques. 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.

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Blasting near open pit walls

Abstract: The topic of blasting near pit walls is one that invokes mixed reactions from different mining departments. For many mine operations and mine scheduling departments, it often represents a significant disruption to efficient work flow, while to geotechnical departments it represents a critical component in the task of delivering safe and competent pit walls and …

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Pit wall optimisation and effective wall management strategies …

Abstract: The requirements for open pit wall optimisation are often reliant on the drive for maximum ore extraction while maintaining the stability of the individual benches and overall slopes. In a very basic sense, slope optimisation can mean increasing the slope angles and/or bench heights and deepening of the pit against the original design with an objective to integrate …

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Limiting Blast-induced Damage On Final Pit …

Design methods for controlled blasts to limit final wall damage in quarries and hard rock mines By A. J. Rorke, director, Blasting Technology, BME, a member of the Omnia Group, Johannesburg, South Africa ... the correct …

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Presplitting blasting

This technique is especially effective in back-break control through providing a separating surface between the main blasting pattern and open pit final walls (Dindarloo et al., 2015). Achieving a solid backbreak is essential for preserving wall stability and maximising blasting efficiency in mining operations.

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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 Mines. 7th Australia -New ...

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Blasting near open pit walls

Open pit blasting must be considered as a mining process with well-defined customers, those being the excavator/truck fleet (pit productivity), the processing plant (plant productivity), and …

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Design of controlled blasting (pre-splitting) in Golegohar …

This technique is especially effective in back-break control through providing a separating 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.

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Final Wall Stability in Metal Open Pit Mines Using Presplit …

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 …

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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. It is very important to study how to control vibration induced by blasting in the mitigation of negative effects of blasting in open-pit mines.

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(PDF) Deformation and failure characteristic of open-pit …

However, limited studies have been conducted on the deformation behavior of open-pit slopes subjected to the combined effects of mining blasting and rainfall infiltration.

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Pit Slope Configuration for Open Pit Mining – A Case Study

From the analysis, multi-bench scale slope instability occurrence was found to be rare but single-double scale could be possible at the western wall of the planned pit with probability of failure of about 0.4. Presplit and trim shots perimeter blasting techniques are recommended to maintain the integrity of the final pit walls at certain areas.

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Final Wall Stability in Metal Open Pit Mines Using Presplit Blasting …

Importance of presplit drilling and blasting in open pit mines slope stability study is one of the most considerable parameter for safety and economical factors of open pit mines. 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. Production and ...

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1998

This document discusses measuring and modeling blast-induced damage in open pit mine walls. It describes: 1) Developing predictive vibration models based on field measurements to predict damage at various blast designs and distances. …

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Final Wall Stability in Metal Open Pit Mines Using Presplit Blasting

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 …

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Limiting Blast-induced Damage On Final Pit Walls

Controlling damage by designing pit-wall geometries that are more robust to blasting along the final wall. Controlling damage by using accurate electronic delay detonators to prevent non-sequential firing in production blasts …

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Final Wall Stability in Metal Open Pit Mines Using Presplit …

This paper aims to illustrate the technical aspects of use of the successful presplit blasting method in metal open pit mines. It also shows that using this approach not only …

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Numerical study on spatial distribution of blast-induced …

Despite adopting controlled blasting methods such as smooth blasting, presplitting blasting etc., the occurrence of a damage zone in the final wall is inevitable. 4 As an important part of open-pits, the damage to the final wall poses a serious threat to the safety of mine slopes. 5 Therefore, studying and predicting the spatial distribution of ...

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Continuous Monitoring and Improvement of the Blasting Process in Open

The current techniques used for monitoring the blasting process in open pit mines are manual, intermittent and inefficient and can expose technical manpower to hazardous conditions. ... 2D images of the pit wall to generate a 3D model or an orthophoto for structural mapping and assessing the impact of blasting on the final wall geometry. By ...

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GEOTECHNICAL CONSIDERATIONS IN OPEN PIT MINES

(e) analysis is carried out of open pit wall stability for the projected geometry of the pit; (f) appropriate drilling and blasting procedures are used to de velop final walls;

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Final Wall Stability In Metal Open Pit Mines Using Presplit …

Implementing stable final pit walls in open pit mines during the open pit designing phase and mine exploitation has become one of the most important concerns of mining …

WhatsApp: +86 18221755073

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.

WhatsApp: +86 18221755073

Pit wall optimisation and effective wall management strategies …

PDF | On Jan 1, 2020, Musah Abdulai and others published Pit wall optimisation and effective wall management strategies at Invincible Open Pit, St Ives Gold Mines | Find, read and cite all the ...

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GEOTECHNICAL CONSIDERATIONS IN OPEN PIT MINES …

(e) analysis is carried out of open pit wall stability for the projected geometry of the pit; (f) appropriate drilling and blasting procedures are used to de velop final walls; and (g) appropriate methods of open pit wall monitoring are used over a period of time to determine wall stability conditions. Penalty: See regulation 17.1.

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A Methodology for Assessing the Impact of In Situ Fractures …

Drilling and blasting is the conventional method used for rock fragmentation in open pit mining. Blast-induced damage can reduce the level of stability of benches and pit slopes. To develop an optimal blast design, an adequate knowledge of the rock properties and in situ fractures is needed. Fractures are generally the paths of least resistance for explosive energy …

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EVALUATING OPEN PIT HIGHWALL DIG COMPLIANCE

Buaba, Judith, "EV ALUA TING OPEN PIT HIGHWALL DIG COMPLIANCE" (2018). ... development of a mine are drilling and blasting of the rock mass and excavating the blasted ... approach the final pit ...

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Controlled blasting for long term stability of pit-walls

Controlled blasting techniques were used to control over-breaks and to aid in the stability of the remaining rock mass at Rampura Agucha open-pit mine in India. The mine is a lead zinc mine producing 5.95 mtpa of ore and has recently started its underground part, which is slated to produce 4.5 mtpa of ore in near future.

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Design of openpit mining | PPT

2) Conceptual mine planning including pit layout, equipment selection, and modifications or optimization. 3) Detailed steps in the design process such as studying exploration data, setting final pit limits, developing …

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Chapter Open Pit Mining

overburden and tailings (waste) at a specified disposal site outside the final pit boundary. Open pit mining is used for the extraction of both metallic and nonme- ... blasting, and haulage) are cyclical. This is true for hard rock overburden which must be drilled and blasted first. An exception to the cyclical effect is dredging

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Characterization of the extent of blast-induced damage in an open pit …

An optimal open pit bench blast relies on controlled explosive energy release, and adequate energy distribution. Excessive damage beyond the intended excavation area (wall damage) can create ...

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(PDF) Blasting pattern optimization in open-pit mines by …

The blasting operations in open-pit mines are one of the most sensitive and complex mining methods which are defined under special circumstances and specific purposes.

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Blasting near open pit walls

Blasting near open pit walls CK McKenzie 84 APSSIM 2016, Brisbane, Australia Open pit blasting must be considered as a mining process with well-defined customers, those being the excavator/truck fleet (pit productivity), the processing plant (plant productivity), and the geotechnical department (pit safety).

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