(PDF) Determination of Powder Factor for an Optimize d Blast Pattern …
Determination of Powder Factor for an Optimize d Blast Pattern Design Using Artificial Neural Network (Case Study: Gol-e-Gohar Iron Ore Mine) September 2007 Conference: 3rd Iranian Rock Mechanics ...
Optimization of drilling and blasting operations in an open pit mine
Drilling and blasting play vital roles in opencast mining. These operations not only affect the cost of production directly but as well and significantly, the overall operational costs.
A system-wide approach to minimize the operational cost of …
The production cycle of open-cast coal mines generally includes drilling, blasting, loading, hauling and coal preparation activities. Individual optimization of these activities does not mean that the whole system is optimized. This paper proposes a cost model considering all activities in mining cycle and system-wide approach to minimize …
Neural Network Applied to Blasting Vibration Control Near …
This paper shows the development and application of an ANN to predict and control blast-induced vibrations at a community close to a large-scale open pit iron mine. The ANN was trained to predict the peak vector sum (PVS) using measured data obtained from mine blasting operations.
Assessment of Blasting Quality of an Opencast Mine
Assessment of Blasting Quality of an Opencast Mine Mithilesh Kumar Rajak, G.K Pradhan, M. J. A. Prince Abstract: The goal of this study is to assess the blasting quality ... appropriate delay pattern, direction of blasting, and the blast hole environment also affect the blasting performance and hence the optimum fragmentation [8]. In this study ...
Energy Factor-Based Blast Design in Large Opencast Coal Mines
Much of this volume is blasted in the form of benches, a common mining technique (Gustafsson, 1973). Blasting is a part of Large Opencast Coal Mine (LOCCM) operations, and is scheduled based on ...
Optimization of Blasting Parameters in open cast mines
There are three types of exploder used in Indian mines i.e. Magneto (or Dynamo) Exploder, Battery condenser Exploder and Condenser dynamo Exploder. 3.2.3 Blasting Pattern Followed in Opencast Mines In opencast mines both vertical and inclined holes parallel with bench face is practiced. Row of the holes may be in single or multiple.
(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 …
OVERVIEW OF BLASTING PARAMETERS OPTIMIZATION …
The goal of the investigation is to develop a result of optimum blast design through some parameters, as type of explosive, explosive quantity, blast pattern and fragmentation. …
(PDF) IRJET- Enhancing Productivity in Opencast Mines -A …
RESULTS – FIELD WORK AT OPENCAST BAUXITE MINE - A Table – 1 - Details of Trail Blasts Conducted at Bauxite Mines-A. Blast Number Parameter B1 B2 B3 B4 B5 Number of rows - 4 4 5 4 5 Number of holes - 50 45 60 55 48 mm 102 102 102 102 102 Burden m 3.75 3.75 3.75 3.75 3.75 Spacing m 3 3 3 3 3 Drilling Pattern - Staggered - Stemming m …
Blast design in opencast mining | PPT
12. Blasting parameters Explosive consumption - The amount of explosive required to break the rock into an average size is called blasting consumption. Explosive consumption depends on rock strength and geology, kind of explosive, size of hole, delay system, initiation system, product size, available free face etc. Energy factor – energy …
Optimization of Blast Design Parameter for Ring Blasting in …
Sublevel stoping is the most popular and practiced mining method in underground hard rock mines. Proper planning and its execution is the key requirement for stope extraction using this method. The stope extraction has been a challenging task since decades. The major reason is the unavailability of free faces as compared to opencast …
Flyrock prediction and control in opencast mines: a critical …
Flyrock is unwanted throw of rock fragments during bench blasting in mines and civil constructions. The phenomenon is a probabilistic one and has been treated differently by several workers. Two basic models for prediction of flyrock range and size are in vogue. Indian authors have also tried to establish a relationship but have received …
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, …
Investigation Of Firing Patterns On Fragmentation In An Indian Opencast
One of the most fundamental and important controllable parameters is the firing pattern in multi-row blast rounds 2. Nominal drilling patterns with a burden 'B' and spacing 'S' can be subject to radical modification depending on the firing sequence, which brings into focus the role of effective burden 'Be' and effective spacing ...
drilling patterns in opencast mines
Blasting Pattern In Opencast Iron Mines. Drilling and blasting iron ore mine youtube dec 09 2016 crushing plant grinding machine drilling and blasting iron ore mine drilling and blasting in open cast iron mine at sishen pit viper 351 rigs drill read more energy and environmental profile of the morethere safety rules opencast iron mines.
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) …
OVERVIEW OF BLASTING PARAMETERS OPTIMIZATION …
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:
BLASTING IN FIRE AREAS IN OPENCAST MINES
Conditions for conducting blasting in fire areas in an opencast coal mine (1) Blasting operations shall be carried out under direct supervision of an Assistant manager in charge of Blasting operations. (2) Persons trained in the job of blasting in Fire area only shall be deputed for the said operation. (3) No explosive other than slurry or emulsion explosives …
BLAST VIBRATION MONITORING IN OPENCAST MINES
blasting practices in mines has become a serious environmental issue in today's scenario. Various factors influence the blast vibration being produced from the blasting …
Prediction of Backbreak in Open-Pit Blasting Operations
Backbreak is an undesirable phenomenon in blasting operations. It can cause instability of mine walls, falling down of machinery, improper fragmentation, reduced efficiency of drilling, etc. The existence of various effective parameters and their unknown relationships are the main reasons for inaccuracy of the empirical models. Presently, the …
Optimization of blasting parameters in opencast mines
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 …
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:
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 …
INFLUENCE OF ROCK AND EXPLOSIVES PROPERTIES …
In opencast coal mines, massive overburden is removed to reach the coal ... fines with modification of blasting pattern (Adhikari et al., 1990). ... proved to be a good economic proposition in the ...
Optimization of drilling and blasting operations in an open pit mine
Drilling and blasting play vital roles in opencast mining. These operations not only affect the cost of production directly but as well and significantly, the overall operational costs. This research was carried out to find a possible way of optimizing the drilling and blasting operations in an open pit mine of Somair (Société des Mines de l ...
(PDF) SELECTION OF THE MOST PROPER DRILLING AND BLASTING PATTERN BY
Aryafar et al. [11] determined the optimal drilling and blasting pattern in the open-pit iron mine by first using AHP method under a fuzzy environment to define the weight of criteria and then ...
Optimization of Blasting Parameters of Opencast Mines
The goal of the investigation is to develop a result of optimum blast design through some parameters, as type of explosive, explosive quantity, blast pattern and fragmentation. …
Optimization of Design Parameters of 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 pattern has to be achieved. Proper …
Assessment of Blasting Quality of an Opencast Mine
Abstract: The goal of this study is to assess the blasting quality of an opencast mine based on fragmentation analysis. Fragmentation of an opencast mine is one of the …