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.

Blast design in opencast mining SlideShare

Oct 12, 2017 Blasting patterns followed in opencast mine There are two types of blasting patterns followed in opencast mine Single Row blasting pattern. Multi-row blasting pattern. Generally multi- row blasting patterns are followed for better fragmentation and less explosive consumption. 14. Multi-row blasting patterns 15.

blasting pattern in opencast mines

Blasting Pattern In Opencast Mining krasnaprace . Blasting Pattern In Opencast Mines Blasting pattern in opencast mining blasting pattern in opencast mining himalayahouse explosive casting is the technique used by many surface coal mines to control the displacement of overburden by means of explosive energy the casting moves of the overburden into the

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:

Blasting Techniques Used in Underground and Opencast Mines

ADVERTISEMENTS: 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: ADVERTISEMENTS: (1) Pyramid cut or cone

Blasting Pattern In Opencast Mining

blasting pattern in opencast mining rock crusher india. better fragmentation in opencast iron ore. blasting pattern in opencast iron mines Quarrying Crusher Plant. Read more. blasting in open cast iron mines.

(PDF) ROCK BLASTING FOR MINING ResearchGate

Apr 15, 2017 In opencast mines, both vertical and incl ined . [Show full abstract] exported from the model so that pattern and blast design can be undertaken in other software packages.

blasting pattern in opencast iron mines

blasting pattern in opencast iron mines. We are a professional mining machinery manufacturer, the main equipment including: jaw crusher, cone crusher and other sandstone equipment;Ball mill, flotation machine, concentrator and other beneficiation equipment; Powder Grinding Plant, rotary dryer, briquette machine, mining, metallurgy and other

blasting pattern in opencast mines

Blasting Pattern In Opencast Mining krasnaprace . Blasting Pattern In Opencast Mines Blasting pattern in opencast mining blasting pattern in opencast mining himalayahouse explosive casting is the technique used by many surface coal mines to control the displacement of overburden by means of explosive energy the casting moves of the overburden into the

Blasting Pattern In Opencast Mining

blasting pattern in opencast mining rock crusher india. better fragmentation in opencast iron ore. blasting pattern in opencast iron mines Quarrying Crusher Plant. Read more. blasting in open cast iron mines.

blasting pattern in opencast iron mines

blasting pattern in opencast iron mines. We are a professional mining machinery manufacturer, the main equipment including: jaw crusher, cone crusher and other sandstone equipment;Ball mill, flotation machine, concentrator and other beneficiation equipment; Powder Grinding Plant, rotary dryer, briquette machine, mining, metallurgy and other

The basic patterns of drill holes employed in opencast

• The basic patterns of drill holes employed in opencast mines are • Square Pattern • Staggered (or) Triangular pattern • Single row blasting pattern • Multi blasting pattern • Wedge cut pattern • Diagonal blasting pattern • Square Pattern: • This pattern can also be called as multi row pattern.

BLAST VIBRATION MONITORING IN OPENCAST MINES

3.5 Blasting Pattern Followed in Opencast Mines 16 3.5.1 Single row firing pattern 16 3.5.2 Multi Row firing pattern 17 3.5.3 Beside cut pattern other pattern of blasting in multiple row of firing are as given below 18-19 CHAPTER 02: GROUND VIBRATION 4.1 Blast Vibration 21 4.2 Ground Vibration 21

Applicability of Controlled Blasting in Large Opencast

The Jayant Opencast Project is a coal mine producing 15.5 mtpa of coal and 51.5 Mm 3 of overburden is being removed through drilling and blasting. The mine is

Open Cast Coal Mining Blasting Pattern- SOF Mining machine

Blasting pattern in opencast mining blasting pattern in opencast mining himalayahouse explosive casting is the technique used by many surface coal mines to control the displacement of overburden by means of explosive energy the casting moves of the overburden into the minedout pit while the remaining spoil is removed. Get Details

Rock fragmentation control in opencast blasting

Apr 01, 2016 1. Introduction. Rock fragmentation distribution influences a range of mining and milling processes including load and haul rates, crushing and grinding performance and ore recovery in beneficiation processes (Michaud et al., 1997).In opencast mining, where blasting is employed for excavation, the overall cost effectiveness of the production operations is

Blast vibration monitoring in opencast mines ethesis

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. Various factors influence the blast vibration being produced from the blasting practices such as the pattern of blasting, drilling pattern, quality and quantity of explosives being used, delay pattern

Blasting Pattern In Opencast Mining

Blasting Pattern In Opencast Mining. enhance the safe, effective, and efficient use of blasting technology by the mining industry. Recent research results of the surface mine blast ing program were presented at a seminar on April 15, 1987, in Chicago, IL.

Drilling patterns QueensMineDesignWiki

Blast patterns with square patterns are simple and provide good results where spacing equals the burden. Although, in hard rock mining triangular formations where the burden is 1.15 times greater than the spacing are more effective as it induces further twisting and shearing of the rock and avoids splitting between blast holes on planes before

Blast Hole Drilling: The Basic Process RPM Drilling

Aug 24, 2017 Blast hole Drilling is a technique used in mining whereby a hole is drilled into the surface of the rock, packed with explosive material, and detonated. The aim of this technique is to induce cracks in the inner geology of the surrounding rock, in order to facilitate further drilling and associated mining activity.

open pit mine blasting YouTube

blasting in northern b.c.

Blast-Casting Mechanism and Parameter Optimization of a

In bench deep-hole blasting in opencast mines, several columnar blast holes are usually laid out in a line, which is approximately equivalent to the plane charge method. Each hole on the charge distribution plane produces a spherical or cylindrical gas cavity after detonation, which expands rapidly in all directions at the same speed [ 22,23 ].

Blasting Pattern In Opencast Mining

blasting pattern in opencast mining rock crusher india. better fragmentation in opencast iron ore. blasting pattern in opencast iron mines Quarrying Crusher Plant. Read more. blasting in open cast iron mines.

BLAST VIBRATION MONITORING IN OPENCAST MINES

3.5 Blasting Pattern Followed in Opencast Mines 16 3.5.1 Single row firing pattern 16 3.5.2 Multi Row firing pattern 17 3.5.3 Beside cut pattern other pattern of blasting in multiple row of firing are as given below 18-19 CHAPTER 02: GROUND VIBRATION 4.1 Blast Vibration 21 4.2 Ground Vibration 21

Applicability of Controlled Blasting in Large Opencast

The Jayant Opencast Project is a coal mine producing 15.5 mtpa of coal and 51.5 Mm 3 of overburden is being removed through drilling and blasting. The mine is

open pit mine blasting YouTube

Nov 29, 2010 blasting in northern b.c.

ON-BENCH PRACTICES FOR OPEN CUT MINES AND

including blast notification,setting of blast gua rds, clearance of the blast exclusion zone, firing the shot, post-blast clearance ,or misfire management. These are described in the AEISG Code of Good Practice, “Blast Guarding in an Open Cut Mining Environment”.

Designing Blast Patterns Using Empirical Formulas

Designing Blast Patterns Using Empirical Formulas A Comparison of Calculated Patterns With Plans Used in Quarrying Limestone and Dolomite, With Geologic Considerations By Joseph M. Pugliese Twin Cities Mining Research Center, Minneapolis, Minn . . US Department of Interior Office of Surface Mining Reclamation and Enforcement Kenneth K

Blast Hole Drilling: The Basic Process RPM Drilling

Aug 24, 2017 Blast hole Drilling is a technique used in mining whereby a hole is drilled into the surface of the rock, packed with explosive material, and detonated. The aim of this technique is to induce cracks in the inner geology of the surrounding rock, in order to facilitate further drilling and associated mining activity.

Blasting in opencast coal mines . Important steps in Hindi

Jan 08, 2019 Mining update ..- speed of explosive van --- 25km/h-- jitne explosive ka jarurat hota h utna h blasting face pe Laga jata h .. only one shift ..-- ap hamare

Keeping blast sites safe from lightning risks MINING.COM

Feb 27, 2017 Lightning strikes on opencast mines and quarries pose a regular threat to life and productivity, and are of particular concern to blasting personnel and

Blast Design Software Blasting Pattern Software Blast

Based on desired blasting inputs such as face co-ordinates, hole diameter, pattern layout, face rock characteristics and location, face profile, hole diameter, pattern layout, desired fragmentation size, explosives and initiating devices, environmental constraints, BLAST DESIGNER SOFTWARE (BLADES) calculates blast plan parameters, explosives charge distribution,

Investigation Of Firing Patterns On Fragmentation In An

The firing patterns used were: ‘skewed V’, ‘in line’, ‘diagonal’ and ‘extended V’. Results for blast designs using a 150mm blasthole diameter. The field observations and the results of the four blasts, all conducted on the same limestone bench, are tabulated in table 2. The drilling and firing patterns for the four blasts are

Blast-Casting Mechanism and Parameter Optimization of a

In bench deep-hole blasting in opencast mines, several columnar blast holes are usually laid out in a line, which is approximately equivalent to the plane charge method. Each hole on the charge distribution plane produces a spherical or cylindrical gas cavity after detonation, which expands rapidly in all directions at the same speed [ 22,23 ].

An Investigation to Assess the Cause of Accident due to

Apr 24, 2020 The ‘Danger Zone’ as given in Coal Mine Regulations has already been increased from 300 to 500 m in the new Coal Mines Regulation [Reg. 196 (2) (b)] to avert flyrock-related accidents in opencast coal mines. There are many reasons for flyrock causes and associated accidents during blasting in opencast mines.

Reduction of Blast Induced Ground Mining and Blasting

Opencast mines are currently using more than 200 tons of explosives in a single blast. Mines which were once far away from the villages/townships find themselves surrounded by settlements. Apart from mining, blasting has become an integral part of many allied industrial activities. In recent times, problems due to blasting in general,