drilling patterns used in opencast mines

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 …

Thedevelopment ofdrilling andblasting practice atPalabora ...

Stabilizers are used to ensure that the path ofthe tricone bit remains concentric about the centre line of the drill string. At Palabora, stabi-lizersaremade upintheworkshops from1,2mlongshoulder-to-shoulder subs with nine 10by 6by 1,5cm blocks welded in an offset pattern round the sub. Each block contains eleven secondhand tungsten carbide

various drill machines used in Opencast mines - YouTube

Jul 20, 2020· various drill machines used in Opencast mines karuna kumar bugge. ... Different Machinery used in Opencast mines - Duration: ... BLAST HOLES AND PATTERNS FOR Open Cast Mining - Duration: 56 ...

Drilling patterns - QueensMineDesignWiki

This drill pattern uses a series of parallel holes are drilled closely spaced at right angles to the face. This results in the deepest excavation possible with the choice equipment and is therefore the most common drill pattern used where the rock mass allows.

MINING EQUIPMENT SELECTION FOR A TYPICAL OPENCAST …

The importance of drill evaluation is highlighted since inadequate fragmentation, the direct result of poor drilling and blasting techniques, extends to other facets of opencast mining. Draglines, generally used in surface coal mines, prove to be a successful mining method with distinct capital and operating cost

Optimization of drilling and blasting operations in an ...

Nov 01, 2009· CIM Bulletin, 2000(93): 38–44. [3] Steve F. A solid drilling program yield more benefits than simply cost savings. Engineering and Mining Journal, 2000. [4] Brahma K C, Pal B K, Das C. A study on application of Markovian decision process in drilling and blasting op- eration of opencast mines.

Chapter 8 BLAST DESIGN

HOLE PATTERNS Hole array is the arrangement of blastholes (both in plan and section). The basic blasthole arrays are single-row, square, or rectangular and staggered arrays. Irregular arrays are also used to take in irregular areas at the edge of a regular array. The term SPACING denotes the lateral distance on centers between holes in a row.

drilling patterns used in opencast mines

• 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.

Investigation Of Firing Patterns On Fragmentation In An ...

The drilling and firing patterns for the four blasts are shown in figures 4–7. Perusal of table 2 reveals that the blast-design parameters for all four blasts were almost identical. Also, since all the blasts were conducted on same limestone bench with similar explosive, the differences in the fragmentation results can clearly be attributed ...

Drilling in mining - LinkedIn SlideShare

Apr 07, 2014· As diamond bits are used for such drilling, core drilling is often called diamond drilling. 3. Technical drilling during development of a mine for drainage, slope stability and foundation testing purposes. Opencast mining involves removal of waste rock and subsequent winning of the mineral.

JAn 203 1 of 21 Surface Blasting Safety Procedures

oitted to Ecellence in Mining Safety Last Modified: Page: JAN 2013 2 of 21 MODULE 12 (C ONT.)Surface Blasting Safety Procedures Blasting Materials Surface delays, detonators or blasting caps, boosters, safety fuse, down-line and other explosives used for blasting.

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.

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 cut (2) Wedge […]

Enhancement of Drilling & Blasting efficiency in Opencast ...

mines. Computerized drills, Measure-While-Drilling (MWD) systems, and electronic detonators, are gaining wider acceptance in quarries, opencast and underground mines. Cost centers such as drilling, blasting, excavation, hauling and crushing are seen as interrelated variables in the total cost equation.

DRILLING AND BLASTING - Mining Technology

Aug 20, 2018· drilling and blasting Course Objectives : To familiarize the students with exploratory and production drilling including the factors affecting drilling; Various types of the explosives and blasting techniques used in underground and opencast mining are also explained besides blasting in civil constructions projects.

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:

Blast design in opencast mining

Oct 12, 2017· Outline • Introduction • Drilling • Explosive used in opencast mine • Types of variables in blast design • Blasting patterns used in Indian opencast mines • Concept of optimum blasting • Conclusion 3. Introduction • Drilling and blasting is the major unit operation. • Basic objective should be optimum fragmentation.

Drilling and blasting - Wikipedia

Drilling and blasting is the controlled use of explosives and other methods such as gas pressure blasting pyrotechnics, to break rock for excavation.It is practiced most often in mining, quarrying and civil engineering such as dam, tunnel or road construction.The result of rock blasting is often known as a rock cut.. Drilling and blasting currently utilizes many different varieties of ...

drilling patterns in opencast mines

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.

Engineering Geology Field Manual - Volume II - 2nd Ed ...

solution is to use smaller blast holes with smaller blast pattern dimensions. This extra drilling and blasting expense will be more than justified by the savings in loading, hauling, and crushing costs and the savings in secondary blasting. Where possible, the perimeter holes of a blast should be aligned with the principal joint sets. This ...

drilling pattern in an iron ore mine

drilling pattern in an iron ore mine Iron Ore Drilling drilling patterns used in opencast mines - beltconveyers,iron ore advantages and disadvantages; mini gold [More] Drilling Paterns In Undergrund Mining -, drilling paterns in undergrund mining Overview, drilling pattern in an iron ore mine SBM Impact Crusher, drilling pattern .

Drilling Operation in Mining [Full Concept] - YouTube

Feb 23, 2017· Types of Drilling in Mining used. Drillng Methods Percussive Drilling Rotary Drilling Percussive-Rotary Drilling All Drilling Method explain Drilling Application Any suggestions and feedback give ...

Blasting Pattern In Opencast Iron Mines

blasting pattern in opencast mining - trattoriacommercio.it. drilling blasting in opencast iron ore mine. blasting pattern in opencast iron mines SBM . 150270 mm in coal mines 160 mm or above blast hole are used in iron ore mines is . type of drilling iron mining . drilling pattern in an iron ore mine blasting in open cast iron mines smart .

Blast Hole Drilling: The Basic Process | RPM Drilling

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.

(PDF) ROCK BLASTING FOR MINING - ResearchGate

In opencast mines, ... A drilling pattern with staggered holes is a commonly adopted in surface mines where the holes are drilled in rows and columns on the surface like grids. Inclination of hole ...

Blaster's Training Modules - Module 4 - Blasthole Drilling

efficiency. If a quarry plans to use 30-foot bench heights with 7 feet of sub-drill, a drill rig with 25-foot-long steels may not be a good choice, because two steels will be required to complete one hole. Metal mines generally use 50-foot bench heights, for which steels of 30-foot length make sense.

-Blasting Pattern In Opencast Iron Mines-

• 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.

Drilling Blasting In Opencast Iron Ore Mine

Process Of Drilling And Blasting In Mines At India. Process Of Drilling And Blasting In Mines At India. Drilling and blasting iron ore mine Dec 10, 2016 With an ore body 4km long, 80m thick and reaching a depth of 2km, LKABs Kiruna is the worlds largest, most modern underground iron ore mineSince mining began at drilling and blasting iron ore mine Overview of the massive iron ore mine at.

Optimized design of drilling and blasting operations in ...

Nov 01, 2018· 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 two separate parts or merely in a specific parameter, this paper proposes a system dynamic model (SDM) for drilling and blasting operations as an interactive system.

blasting pattern in opencast iron mines zym

blasting pattern in opencast mines - donnet-zedel.nl. blasting pattern in opencast mines; blast pattern Mining and Blasting. Oct 12, 2012· In these cases, the firing pattern can be used to control the blast direction in a more favourable direction and improve the blasting result. Before drilling, the blast direction should be set according to ...

drill machine used in open cast coal mines

Mining Machine Tools was founded in 1997 to manufacture drill rods and drilling ... type of drill rods used in Underground Mines, Opencast Mines and Drill Rods ... Central Mine Planning & Design Institute., Coal India Limited, Hindustan Zinc... More details » Get Price

Drilling and blasting practices in Nevada's openpit mines

Drilling and blasting practices used in openpit mines in Nevada appear to be largely governed by the intensive grade-control practices that have developed as a result

Blasting Pattern In Opencast Iron Mines

Drilling Patterns Used In Opencast Mines August 11, 2019. Drilling machines used in opencast mines drilling machines used in opencast mines products as a leading global manufacturer of crushing grinding and mining equipments we offer advanced reasonable solutions for any sizereduction requirements including drilling machines used in opencast ...

Types of Drilling Methods used in Mining | Boring | Mining ...

In mining areas these are commonly used for drilling large diameter holes in mechanised quarries. Flushing of the hole with compressed air instead of by water under pressure is the common practice with this type of bit. Rock roller bits can be used for deep hole drilling with speed and are suitable for mostly vertical downward holes. III.

Drilling pattern for the initial cut made in open pit mining

Drilling pattern for the initial cut made in open pit mining Products. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including, Drilling pattern for the initial cut made in open pit mining, quarry, aggregate, and different kinds of minerals.

blasting pattern in opencast mining

BLAST DESIGN IN OPENCAST MINES Presented by Gopal Karmakar (Id- 511214015 ) and Jagat kumar (Id- 511214014) Mining Engineering IIEST Shibpur 2. Outline • Introduction • Drilling • Explosive used in opencast mine • Types of variables in blast design • Blasting patterns used in Indian opencast mines • Concept of optimum blasting ...