Blasting Techniques Used in Underground and Opencast Mines | Mining
Read this article to learn about the blasting techniques adopted in underground and opencast mines. Blasting Techniques Adopted in Underground Mines: Drilling Patterns in Stone: Drilling patterns, also called shot-hole patterns, are named after the type of cut holes used and the principal patterns are: (1) Pyramid cut or cone cut (2) Wedge cut (3) …
اقرأ أكثر
Latest Advancement in Drilling-Blasting & Rock
The drilling pattern and delay timing for the slot raise blast was decided on the basis of model output. The experimental trials at the mine was taken on the basis of …
اقرأ أكثر
sbm/sbm blasting in opencast iron ore mines.md at master …
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
اقرأ أكثر
Optimization of blasting parameters in opencast mine with
During the development of the opencast mines, most of the investment goes towards the blasting of the rocks. The blasting can cost at least 5% of the cost of production during the running of the mine, whereas during the developmental stage, a mine may spend as high as 20% or … See more
اقرأ أكثر
Optimization of blasting parameters and prediction of …
@article{Bai2023OptimizationOB, title={Optimization of blasting parameters and prediction of vibration effects in open pit mines based on deep neural networks}, author={Runcai Bai and Pengfei Zhang and Zhiqiang Zhang and Xue Sun and Hong Lu Fei and Shi-Tai Bao and Gang Hu and Wenyan Li}, journal={Alexandria Engineering …
اقرأ أكثر
Opencast Mining
Opencast Mining. Opencast mining destroys landscapes, forest, and wildlife habitat at the mining site when trees, plants, and topsoil are cleared from the mining area. ... A pattern of blast holes has been drilled into the overburden on the right of the image. The coal is removed by a power shovel and placed into trucks for haulage from the ...
اقرأ أكثر
Blast-Casting Mechanism and Parameter Optimization of a
1. Introduction. Blast-casting practice in opencast coal mines is characterised by large blast hole diameter and large charges. The powerful energy produced by the explosive would break the rock mass into pieces and then eject them from the working bench.
اقرأ أكثر
Blast-Casting Mechanism and Parameter Optimization of a
Blast-casting practice in opencast coal mines is characterised by large blast hole diameter and large charges. The powerful energy produced by the explosive would break the rock …
اقرأ أكثر
Controlled Blasting Within Danger Zone of 500 M From
The mine is located in Pakur District, Jharkhand State. The residential houses and other important structures were present within 100 m from the studied blasting sites. The study was conducted to develop controlled blasting patterns for safe blasting operations within the blasting zone of 50–100 m from the nearby dwellings.
اقرأ أكثر
Blast vibration Monitoring at opencast Iron Ore Mine
In this report the blast vibration monitoring techniques is studied. Ground vibration induced by blasting practices in mines has become a serious environmental issue in today's scenario. A number of factors influence the blast vibration being produced from the blasting practices such as the pattern of blasting, drilling pattern, quality and ...
اقرأ أكثر
OVERVIEW OF BLASTING PARAMETERS OPTIMIZATION …
This topic mainly works on the study and evaluation of optimum blast and blasting parameters. In mining industry OPENCAST mining, the DRILLING AND BLASTING is …
اقرأ أكثر
INFLUENCE OF ROCK AND EXPLOSIVES PROPERTIES …
influence of rock and explosives properties and blast design parameters on dust generation during blasting in opencast coal mines – an approach s. roy1 and t. n. singh2 abstract
اقرأ أكثر
Optimization of Blasting Operation in Opencast Mine
The holes drilled in a row may be single or multiple. So those two patterns are used, mainly in the opencast mines. They are: a) Single row blasting pattern b) Multi row blasting pattern Single row blasting pattern: In single row blasting pattern only one row of holes are drilled and charged in a bench face.
اقرأ أكثر
Design of controlled blasting (pre-splitting) in Golegohar iron …
Pre-splitting is a controlled blasting technique with applications in open pit mines. The main objectives of pre-splitting in open pit mining are: preventing/controlling back-break; controlling ...
اقرأ أكثر
(PDF) Blast Design in Opencast Mines
The available techniques for drill and blast design in underground mining were analyzed. The advantages and disadvantages of the widely used blast-hole patterns, types of cuts, and explosives are ...
اقرأ أكثر
Controlled Blasting in Mines & Quarries- A Paradigm
A method of single round large-scale blasting in which substantial amount of explosive charges are fired in small audits or tunnels driven, at the floor level, in the face of a quarry or slope of an opencast mine or even in small hills. It is used where it is impractical to drill holes vertically. Non-electric and electronic blasting
اقرأ أكثر
Optimized design of drilling and blasting operations in open pit mines
1. Introduction. Mining activity is mostly represented by these four main operations: drilling, blasting, loading and hauling. For a proper mine planning and design, all of these operations need to be carefully planned in such a manner that can prevent extra loads such as operating costs, environmental footprints, etc. Amongst these operations, …
اقرأ أكثر
Optimization of Blasting Operation in Opencast Mine
In opencast mining both vertical and inclined holes practiced with the bench face. The holes drilled in a row may be single or multiple. So those two patterns are used, mainly in the opencast mines. They are: a) Single row blasting pattern b) Multi row blasting pattern Single row blasting pattern:
اقرأ أكثر
(PDF) Determination of Powder Factor for an Optimize d Blast Pattern …
Drill and blast system is used in hard rock excavation due to its economics and adaptability to changing rock mass conditions. Common question during mining and tunneling operations is 'whether ...
اقرأ أكثر
Chapter 8 BLAST DESIGN
BLAST DESIGN (Figure 8-2) Staggered pattern (Figure 8-3) Sing (Figure 8-1) Square or rectangular pattern. 114 DELAY PATTERNS ... 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 use of this energy is a major factor in keeping …
اقرأ أكثر
Optimization of Blasting Parameters in opencast Mines
Development of a Blast Optimization Model. Selection of proper explosive in any blasting round is an important aspect of optimum blast design. Basic parameters include VOD of …
اقرأ أكثر
Innovative Blast Design for Reduction of Boulder Generation in Opencast …
The geological and geotechnical parameters are assessed in this process. The charging pattern, delay timing and free face condition primarily affects the resulting blast induced fragmentation. In this paper, an innovative blast design methods used at Kanchan opencast coal mine to reduce the generation of oversize boulders, has been …
اقرأ أكثر
Optimized design of drilling and blasting operations in open pit mines
Drilling and blasting are the two most significant operations in open pit mines that play a crucial role in downstream stages. While previous research has focused on optimizing these operations as ...
اقرأ أكثر
Optimization of drilling and blasting operations in an open pit mine
Drilling and blasting play vital roles in opencast mining. These operations do not only affect the cost of production directly but as well the overall operational costs (Busuyi, 2009). The ...
اقرأ أكثر
Dispersion of respirable particles from the …
The paper presents the outcome of a study that involved measurements of PM concentration and local meteorology for a period of 24 days in two opencast iron ore mines to address the above in terms of (i) particle …
اقرأ أكثر
Simultaneous prediction of fragmentation and flyrock in blasting …
Further, the SveDeFo model by Hjelmberg [11] considers the rock mass type and the blast pattern for mean fragment size prediction. Meanwhile, these predictive models have not incorporated all of the relevant parameters. ... The Sangan iron mine is located 300 ... Flyrock prediction and control in opencast mines: a critical appraisal. Eng …
اقرأ أكثر
Optimization of blasting parameters and prediction of
Predictive analysis of blasting vibration effects in open pit mines. In the process of blasting excavation, the east slope steps of the quarry were partially damaged, causing tumbling rocks on the slope and damage to the bottom of the slope, which seriously affects the safety and stability of the slope and brings safety hazards to the ...
اقرأ أكثر
Blast design in opencast mining | PPT
Blasting There are two types of variables in blasting design 1. Uncontrollable variables- geology, rock characteristics and local specifications 2. Controllable variables- Burden and spacing, Hole …
اقرأ أكثر
Energy Factor-Based Blast Design in Large Opencast Coal Mines
Blasting is a part of Large Opencast Coal Mine (LOCCM) operations, and is scheduled based on production requirements. With dragline pits, equipment size and operating parameters allow engineers to ...
اقرأ أكثر
Blasting Principles
The combined cycle of drilling and blasting, often classified as a discrete process and cost centre in most mines. Drill Pattern. A group of blastholes on a bench or face form a drill pattern. E Effective Energy. The amount of energy …
اقرأ أكثر