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Open-pit mining Wikipedia
Open-pit, open-cast or open cut mining is a surface mining technique of extracting rock or minerals from the earth by their removal from an open pit or borrow.. This form of mining differs from extractive methods that require tunnelling into the earth, such as long wall mining.Open-pit mines are used when deposits of commercially useful ore or rocks are found near the surface.
Open cast Mineral Resources are quoted as in-situ tonnages and Mineral Reserves are tonnages falling within an economic pit-shell. The evaluation method is generally Ordinary Kriging with mining block sizes ranging from 10 x 10m to 100 x 100m to 250 x 250m in the plan view.The blocks vary in thickness from 2.5 to 50m.The Inverse Distance method
Blasting Drilling of Open Pit Mining Hardrockdrills
Lecture Overview Introduction Pit Geometry Interaction deposit geometry Design and management Overall process Interaction of distinct operations Machinery Drill Rigs, Loaders, Excavators etc. General appraisal History From ancient times to now Classifications By operation size By material By level of mechanization Operation Size Huge operations 50 Mio t and more Big operations 10 Miot
How Stemming Works in Open Pit Blasting: Part 1 YouTube
26/03/2014· A short video describing the concept of stemming of bore holes in surface mining and how its works from the shock wave dynamics perspective.
Blast Hole Drilling: The Basic Process RPM Drilling
Blast hole drilling is traditionally used wherever the mining company wants to explore the mineral composition or potential mineral yield of the area demarcated for their mining interests. Blast holes are thus a fundamental step in the exploratory mining process, and can be employed in both surface mining operations and underground mining operations to varying degrees with varying effects or
Blasthole drilling in open pit mining MINING.COM
Drilling equipment manufacturer Atlas Copco has produced a new 204 page free guide to blasthole drilling incorporating eleven technical articles and nine case studies
Glossary of Mining Terms SEC
Rotary drill A machine that drills holes by rotating a rigid, tubular string of drill rods to which is attached a bit. Commonly used for drilling large-diameter blastholes in open-pit mines. Royalty An amount of money paid at regular intervals by the lessee or operator of an exploration or mining property to the owner of the ground
Optimized design of drilling and blasting operations in
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 stone proposes a system dynamic model (SDM) for drilling and blasting operations as an interactive system.
Open pit mining Epiroc
Drilling process in opencast mine YouTube
06/10/2015· drilling process is first phase of blasting drilling in lignite open cast mines panandhro...katchch bhuj....
Ten technologies with the power to transform mining
CAE Mining and the Commonwealth Scientific and Industrial Research Organisation (CSIRO) have pushed the technology further by incorporating 3D imaging technologies in a Camera that can be used in open pit and underground mining areas to capture three-dimensional images of the environment and topography, eliminating the need for geologists, engineers and surveyors to physically visit the mine
Mining of Iron Ores IspatGuru
Drilling in the benches of open pit mining is done for production of iron ore with mechanized drills specific for each mining method. The main objective of drilling operations is to create a hole of suitable diameter, depth and direction in rock for explosives to be placed for blasting activities. The drilling of the holes is done normally in a particular pattern which depends on the bench
H BLASTING IN SURFACE EXCAVATION Mining and Blasting
A new iron ore deposit is to be worked by surface mining methods with 15 m benches using 150 mm diameter blastholes. Since the prevailing condition is dry rock, it has been decided to use bulk ANFO with emulsion cartridges as primer. Assume that the overall density of compacted ANFO and the primer as 0.85 g/cm3 and the powder factor of 0.6 kg/m3. Find the appropriate burden and spacing for
Open pit mining Epiroc
BENCHMARKING THE ENERGY CONSUMPTION OF CANADIAN OPEN-PIT
Benchmarking the energy consumption of Canadian open-pit mines Issued also in French under title: Analyse comparative de la consommation d’énergie des mines à ciel ouvert du Canada. ISBN 0-662-39538-7 Cat. No. M144-70/2005E 1. Strip mining Energy consumption Canada. 2. Strip mining Energy conservation Canada. 3. Energy consumption Canada. 4. Energy conservation
Drilling in mining LinkedIn SlideShare
Drilling in mining 1. Introduction to Drilling Technology for Surface Mining Prof. K. Pathak Dept. of Mining Engineering, IIT, Kharagpur-721302 1 Introduction Drilling is the process of making a hole into a hard surface where the length of the hole is very large compared to the diameter.
Atlas Copco releases new reference book MINING.COM
Atlas Copco Drilling Solutions has announced the 2011 release of “Blasthole Drilling in Open Pit Mining.” This second edition blasthole reference book focuses primarily on the rigs, tools
Prediction of Rock Fragmentation in Open Pit Mines
Mining operations include the five stages such as drilling, blasting, loading, haulage and crushing. Drilling and blasting costs constitute up to 30% of the total operational costs in open pit mines, which will be increased up to 50% by adding more oversize parts and the requirement of secondary blasting.
Open pit copper mining MAXAM
Open Pit Copper-Mining. Open-pit mining is used when the orebodies are extensive and relatively close to the surface. The sterile/ore ratio is one of the factors which defines the exploitation method and the final dimensions of the mine cuts. In general, open-pit mining consists of a system to exploit open pits with multiple benches. Operations start with drilling and blasting to remove the
Open-Pit Mining Definition Anglo American
Open-pit mining, also known as opencast mining, is a surface mining technique that extracts minerals from an open pit in the ground. Open-pit mining is the most common method used throughout the world for mineral mining and does not require extractive methods or tunnels. This surface mining technique is used when mineral or ore deposits are found relatively close to the surface of the earth