Design of controlled blasting (pre-splitting) in …

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 ...

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 ...

(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 ...

Blast-Induced Rock Fragmentation in Wet Holes | Mining, …

In open-pit mining, blasting pattern design is performed to achieve a desired degree of fragmentation for loading, hauling, and crushing operations. Inappropriate fragmentation of rock will result in numerous problems such as incurring extra costs for secondary blasting, production interruption, etc. Wetness of the blast holes is one of the most important factors, which can …

Optimization of blasting parameters and prediction of …

Mineral resources have changed the economic pattern of local cities to a certain extent, thus promoting the economic development of remote areas in China [3].Blasting technology not only determines the safety, quality, and cost of mining, but also has a significant impact on the subsequent bucket loading, transportation, crushing, and other processes as …

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 …

SELECTION OF THE MOST PROPER DRILLING …

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 ...

Blasting Pattern Followed in Opencast Mines | PDF

There are two main types of blasting patterns used in opencast mines: single row and multi-row patterns. The single row pattern results in lower fragmentation and higher explosive consumption than the multi-row pattern. The multi-row pattern includes square grid and staggered grid patterns with variations in spacing and delay timing between rows. Additional patterns like transverse …

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 pattern has to be achieved. Proper adoption of drilling and blasting can contribute …

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.

Final Wall Stability in Metal Open Pit Mines Using Presplit Blasting

The Jayant Opencast Project is a coal mine producing 15.5 mtpa of coal and 51.5 Mm of overburden is being removed through drilling and blasting. ... Unlike the drilling and blasting mine plans, the pattern of a presplit blasting is usually dominated by the capabilities of the drilling rig used at open pit mines. ... Production holes drilling ...

Optimization of blasting parameters in opencast …

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 …

Examiner and Learner Guide For Opencast Mines

This document provides guidance for the assessment and certification of Blasting Certificate holders for opencast mines. It outlines the syllabus, assessment guidelines, score sheets, and sample questions and answers. The syllabus …

Optimization of Blasting Parameters of Opencast Mines

In mining industry OPENCAST mining, the DRILLING AND BLASTING is the major unit operation. The BLASTING is an important process which influences directly on loading, hauling and …

Controlled Blasting Within Danger Zone of 500 M From

DGMS vibration standard is statutorily followed for designing controlled blasting patterns and acquiring blasting permission from the authority in opencast mines/quarries. The circular categorises the structure into two types depending upon the ownership. Each category is further classified into three types of structure.

Optimization of blasting parameters in opencast mine with …

Along with fragmentation of the rocks, blasting also produces an excess of energy in the form of heat and vibration. Due to the spread of the vibration, the surrounding …

Rock Fragmentation Control In Open Cast Mining

Ninety one blasts were conducted with varying blast designs and charging patterns, and their impacts on the rock fragmentation were documented. A high-speed camera ... (Michaud et al., 1997). In opencast mining, where blasting is employed for excavation, the overall cost effectiveness of the production operations is compatible with

Blasting Techniques Used in Underground and Opencast …

Read this article to learn about the blasting techniques adopted in underground and opencast mines. Drilling patterns, also called shot-hole patterns, are named after the type of cut holes …

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 the total mining cost of bench …

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 practices such …

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 …

Optimization of Blasting Parameters in opencast Mines

Selection of proper explosive in any blasting round is an important aspect of optimum blast design. Basic parameters include VOD of explosive (m/s), Density (g/cc), Characteristic …

6 Common Blasting Methods in Open Pit Mining

We know that open-pit mining operations mainly include drilling, blasting, mining, transportation and dumping. Blasting is a very important part of it. Blasting costs account for 15% to 20% of the total cost of open pit mining. Moreover, the quality of blasting directly affects the working efficiency and total cost of the mining process.

Optimization of blasting parameters in opencast mine …

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 more of its expenditure towards blasting [1]. The same energy which breaks the rock also sends out

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 pattern has to be achieved.

(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 "V ...

Overbreak Control in Development Face Blasting of Underground …

Overbreak is a major concern in underground development face blasting. The controlled blasting coupled with the optimum utilization of explosive energy can lead to the reduction of the overbreak.

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.

Advanced Analytics for Drilling and Blasting | SpringerLink

While typical blast patterns are square or staggered equilateral, staggered patterns provide a better energy distribution of explosives between boreholes. According to the bench width and minimizing shovel moves, most blasts are drilled four to five rows. Table 11.2 presents typical blasting parameters in open-pit mines .

Conditions For Deep-Hole Blasting In Opencast Coal Mine

Conditions For Deep-Hole Blasting In Opencast Coal Mine (See Regulation 194 of the Coal Mines Regulations 2017) GENERAL . 1.0 The owner and agent of an opencast mine shall ensure that a prior scientific study is conducted in designing deep hole drilling and blasting system for the mine taking into consideration all mining parameters and machinery parameters …

OVERVIEW OF BLASTING PARAMETERS OPTIMIZATION …

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 …