iron ore blasting pattern method

BLASTING PATTERN DESIGN WITH A NEW DEVELOPED …

2010-8-1 · In. this paper, we attempted to design blasting pattern of Bajgiran tunnel in Iran by using. this software. Obtaining true results with a rapid procedure showed that the use of. computer aided devices can lead to better and more accurate answers. Keywords: Tunneling, Angle hole cut, Parallel hole cut, Nitro Nobel, Blasting pattern.

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

Design of controlled blasting (pre-splitting) in Golegohar iron ore mine, Iran S. R. Dindarloo*1, N.-A. Askarnejad2 and M. Ataei2 Pre-splitting is a controlled blasting technique with applications ...

Comparison of Presplit and Smooth Blasting Methods for ...

To understand differences of smooth and presplit blasting for the excavation of rock wells, two field experiments using these two techniques are implemented at the same test site, respectively. The ground vibrations induced by them have been monitored with the different distances through the corresponding devices. The vibration results illustrate that at the same monitoring distance …

Prediction of rock fragmentation due to blasting using ...

2010-3-10 · Prediction of rock fragmentation is essential for optimizing blasting operation. Fragmentation depends on many parameters such as rock mass properties, blast geometry and explosive properties. In this paper, artificial neural network (ANN) method is implemented to develop a model to predict rock fragmentation due to blasting in an iron ore mine. In the …

Blast Hole Drilling

Blasting through. Utilising down the hole hammer DTH or Rotary Air Blast RAB drilling on drill patterns prior to mining being undertaken. Drill holes ranking in size from 4" up to 10", can be drilled utilising Atlas Copco L8 and Drilltech D45KS rigs.

(PDF) Design of controlled blasting (pre-splitting) in ...

Design of controlled blasting (pre-splitting) in Golegohar iron ore mine, Iran (S. R. Dindarloo et al.,2015). ... The pre-splitting holes aim to extract the rock mass in …

Drilling And Blasting Of Iron Ore

Drilling And Blasting Of Iron Ore. Roughly 98 of iron ore on the global market is used in iron and steel production.Mining and processing mon methods of extracting the iron ore consist of blasting, drilling, or general excavating,,.Most iron ore is produced from open-pit mines.After the iron ore is out of the ground, it may be shipped to the iron and steel manufacturing.

blasting techniques in dolomite quarry

This becomes especially important when blasting method has to be used for quarrying of stones. (iii) Distance from main roads: Stones extracted from a quarry have to be transported to the nearby towns and cities. Naturally, the quarry must be located near to the main network of roads leading to those towns and cities.

Optimization of Blasting Parameters in opencast Mines

2012-7-5 · designed blasting pattern has to be achieved. Proper adoption of drilling and blasting can contribute significantly towards profitability and therefore optimization of these parameters is essential. Introduction Rock breaking by drilling and blasting is the first phase of the production cycle in most of the mining operations.

Iron Mining Process

From blasting to crushing to separation – more than 85% of the iron mined in the United States is mined in northeastern Minnesota to make our nation''s steel. Blasting Taconite is a very hard rock. Using explosives, the taconite is blasted …

(PDF) Design of controlled blasting (pre-splitting) in ...

Table 3 Specifications of test no. 1 Test location Southern wall of mine , working bench 11, blasting pattern no. 168 Materials Iron ore and waste rocks Spacing of joints and cracks Minimum 0.1 and maximum 1.5 m Location of nearby faults 8 m behind the pre-split row Status of underground water Average water height of 4 measured holes was ...

Safe & Efficient Blasting in Opencut Iron Ore Course (2 ...

2012-5-15 · The program is designed to further enhance the skills and knowledge of shotfirers, supervisory personnel, mining engineers, geologists and drill and blast foremen. The objective of this course is to provide participants with a greater understanding of the requirements of drilling and blasting in Open Cut Hardrock Mining, (focussing on Iron Ore ) so that they are able to …

Underground Mining Methods

2009-12-7 · Underground Mining Methods and Applications Production Headframe Hans Hamrin* 1.1 INTRODUCTION Ore is an economic concept. It is defined as a concentration of minerals that can be exploited and turned into a saleable product to generate a financially acceptable profit under existing economic conditions. The definition of ore calls for ...

SELECTION OF THE MOST PROPER DRILLING AND …

blasting pattern for Sangan Iron Mine, Iran. To achieve this, in the first step, rock fragmentation, back break, fly rock, specific charge and specific drilling were considered as the decision criteria and their degree of importance was calcu-lated using the AHP method under a fuzzy environment. Then, TOPSIS and PROMETHEE methods were used to ...

Drilling patterns

2019-6-28 · Drilling Patterns. Various drilling patterns have been developed for approaching the blasting of drifts which are described in the following sub-sections. These patterns refer to the pattern of the initial cuts which are then blasted into from surrounding holes. This is known as stoping, and the additional holes are known as wall, roof or floor ...

DESIGN OF SURFACE BLASTS

2009-4-30 · blasting pattern has to be achieved. Large fragments adversely affect the loading and hauling equipments and increase the frequency of sorting of oversize boulders and secondary blasting, thereby increasing the cost of mining. Similarly, fines are also undesirable as indicates excessive explosive consumption.

Evaluation of effect of blasting pattern parameters on ...

2008-12-1 · The relation between RSE and input parameters in this investigation are shown in Fig. 8.According to strength values obtained from the application of the RSE (), it is concluded that input parameters, including stemming to burden ratio, last row charge to total charge ratio, powder factor, number of blasting rows and total charge per delay are the most effective factors on the …

Method of blasting

The invention claimed is: 1. A method of blasting rock in a blastfield to cause fragmentation of the rock without excessive ground vibrations, the method comprising the steps of: providing two or more rows of blastholes in the rock, wherein the blastholes in at least one of said rows is arranged in two or more groups, each group comprising from 2 to 7 blastholes each of which is adjacent …

v115n7a10 Peak particle velocity prediction using …

2015-9-16 · A large iron ore mine in Iran was selected as a case study. After obtaining different input variables, a SVM model was constructed and tested. Methods Developed by Boser, Guyon, and Vapnik (Boser, Guyon, and Vapnik, 1992; Vapnik, 1995, 1998), support vector machine (SVM) is a relatively new computational learning method for

Iron Ore Recovery from Low Grade by using Advance …

2015-1-1 · Abstract. With increasing global demand of iron ores due to the huge requirement of steel all over the world, important iron ore producing countries have increased their production by initiating steps to utilize the low-grade iron ores, fines and slimes. The main difficulty in processing and utilization of low-grade iron ores primarily stems ...

Drilling, Charging and Blasting Productivity

Advanced blasting technology and clever blast design can improve the utilisation of the drilling fleet and reduce capital and operating costs without compromising productivity. Matching explosive energy to geology enables expanded patterns without affecting fragmentation.

Chapter 11 SPECIALIZED BLASTING TECHNIQUES

2014-6-11 · blasting of cornices increases efficiency, boring holes along the presumed tension line exposes the ava-lanche blaster to considerable danger. Safety in borehole blasting depends critically on: 1. The blasting crews ability to judge correctly the safe working line. techniques for working with this high explosive (See Chapter 5 - Detonating Cord)..

Influence of blasting on the size distribution and ...

2016-9-29 · Methods for determining the fragment size distribution 81 ... rock properties, blasting pattern, charging etc influence the fragmentation in the muckpile. ... Kiruna and Malmberget produce about the same amount of high grade iron ore that passes crushers and AG mills before being separated into fines and pellets material.

FINAL WALL STABILITY IN METAL OPEN PIT MINES …

2016-9-19 · blasting patterns and the role of selecting the correct drilling rigs are elaborated in detail through conducting a case study in Chador Malu iron ore mine in Iran. KEYWORDS Stability, Final wall, Presplit, Drilling, Blasting, Open pit ... drilling pattern are methods used to reduce blast damage to bench wall in metal open pit mines. In general,

Sub-level open stoping

2019-6-28 · Sublevel Open Stoping originated in the early 1900''s in iron ore mines in Michigan, USA. It was developed over the years from a method originally known as short hole bench and train mining.Generally a large scale open stoping method, it is often referred to as long hole or blast hole stoping. A Typical Sublevel Open Stoping Operation.

The Blasting Test and Blasting Vibration Monitoring of ...

2016-5-4 · Because the land requisition and demolishing became difficult more and more, the mining scheme of Luohe iron mine was changed from caving method to filling method. In order to ensure the safety of the residence and the underground tunnel cavern within the mobile belt of the underground mining, the Luohe iron mine did the blasting test on the vertical crater retreat mining method and blasting ...

Extraction of Iron | Metallurgy | Blast Furnace and Reactions

A blast furnace is a gigantic, steel stack lined with refractory brick where the concentrated iron ore, coke, and limestone are dumped from the top, and a blast of hot air is blown into the bottom. All the three ingredients are crushed into small …

Explosives

2011-7-7 · The wide holes in the ground created by drilling, blasting, and ore removal are referred to as "open pits". Exposives and Copper Mining For nearly 5,000 years, copper was the only metal known to man.

How to identify metal Surface ...

2017-3-30 · How to identify metal Surface preparation standards grades?. The surface of metal anti-corrosion cleaning grade, also called cleanliness, has two representative international standards: one is the United States of 1985 "SSPC …

Glossary of Mining Terms

2017-10-14 · Bessemer - An iron ore with a very low phosphorus content. ... Controlled blasting - Blasting patterns and sequences designed to achieve a particular objective. Cast blasting, where the muck pile is cast in a particular direction, and deck blasting, where holes are loaded once but blasted in successive blasts days apart, are examples ...

Ring Blasting Mine to Mill Optimization Benjamin …

2017-7-4 · Ring blasting is a common production method in underground metal mines. As a drill and blast process, it presents particular features that do not correspond with bench blasting in open pit or underground mining. In this paper, a six month mine-to-mill optimization program performed in a Cu-Pb-Zn underground

(PDF) Design of controlled blasting (pre-splitting) in ...

Design of controlled blasting (pre-splitting) in Golegohar iron ore mine, Iran (S. R. Dindarloo et al.,2015). ... The pre-splitting holes aim to extract the rock mass in order to create a smooth face.

Chapter 8 BLAST DESIGN

2014-6-11 · than one face so that simple blasting patterns can be used to remove the rock. In the illustration that follows (Figure 8-4) shows a typical bench cut with two free faces and fired with one delay per row. Figure 8-5 indicates that the direction of throw of the blasted rock can be controlled by varying the delay pattern.

Iron ore extraction techniques

2015-1-1 · Iron ore was won by drilling and blasting ().As mining technology generally developed, so did drilling techniques and the explosives used. Smith (1990) reported that the Cleveland deposit was associated with a very strong stone roof rock (known as "dogger") allowing mine drivages to be self-supporting. However, he states that in later years where the mining had …