Openpit mining

Openpit mining, also known as opencast or opencut mining and in larger contexts megamining, is a surface mining technique of extracting rock or minerals from the earth from an openair pit, sometimes known as a borrow.. This form of mining differs from extractive methods that require tunnelling into the earth, such as long wall mining.Openpit mines are used when deposits of commercially

Copper Mining and Production Processes Explained

Openpit 90% of ore is mined using the open pit method. Ores near the surface can be quarried after removal of the surface layers. The ore. An ore is a rock that contains enough metal to make it worthwhile extracting. Grinding. The ore is crushed, then ground into powder. Concentrating. The ore is enriched using a process called froth

Mining of Iron Ores IspatGuru

Mar 14, 2014· Fig 1 A typical open pit iron ore mine. On the basis of mining methods, iron ore mining can be broadly divided into two categories namely manual mining and mechanized mining. Large iron ore mines are mechanized mines while manual mining methods are employed in the small mines. Manual mining method is normally to float ores.

6 Stages of the Mining Process BOSS Magazine

Safety in Open Pit Mining Mineral Processing & Metallurgy

Dec 15, 2016· Rock falls pose a significant risk in both underground and open pit mines. They could be responsible for a substantial number of fatalities, and serious injuries, infrastructure damage, and financial loss, meaning the production should be stopped for safety issues. Rock fall safety hazards need to be seriously managed in surface mining in order

Underground mining block caving, bore hole, drift fill

Retreat mining is a process that recovers the supporting coal pillars, working from the back of the mine towards the entrance, hence the word retreat.Room and pillar mining advances inward, away from the entrance of the mine. Other underground mining methods include Hard rock mining, bore hole mining, drift and fill mining, long hole slope

Opencast Mining an overview ScienceDirect Topics

The open pit is opening the orebody from the surface by separate removal of ore and associated waste rocks. It is the most economic option for a deposit up to that depth where the economic ratio of ore and waste can sustain. There are many advantages in openpit mining method namelyFull visualization of exposed orebody and negligible ore loss,

What Is OpenPit Mining? (with picture) Info Bloom

The process of openpit mining is precipitated by the analysis of the area in order to determine the presence of the desired material that may be coal or ore. If it is determined that the desired materials are present in the area, the next step would be to calculate the stripping ratio of the mining process, meaning that even though ore, coal

Copper Mining & Extraction Process Flow Chart

Aug 26, 2015· Copper Mining & Extraction Process Flow Chart. This flowchart made of machinery icons explains or expresses in simple but clear terms the step of the Copper Mining and Copper Extraction Process. Starting from either openpit or underground mining and using a different relevant treatment method for oxide or sulphide copper mineral (ore).

The Process of Open Pit Mining Structure and Procedures

Dec 15, 2011· The Structure of the OpenPit Mine. An openpit mine is structured in steps, often also termed benches, which are the pits vertical levels. These steps commonly range from four to sixty meters, but the size is largely dependent upon the machinery used by the mining company. The walls of the pit are called the batter, while the flat

1.1 PHASES OF A MINING PROJECT ELAW

1.1.3.1 Openpit mining Openpit mining is a type of strip mining in which the ore deposit extends very deep in the ground, necessitating the removal of layer upon layer of overburden and ore. In many

Blast Hole Drilling The Basic Process RPM Drilling

Aug 24, 2017· Technique #2 Underground blasting. In underground mining, blasting becomes one of the primary methods of rock excavation. Studies are undertaken in everything from the effect of the vibration of the explosion, to the likely impact of the blast on the existent mining structures, prior to the blasting

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Optimisation grade control procedures at the open pit

A large Copper open pit mine in Chile has lost US134 million over a 10year period because of suboptimal grade control procedures based on the blast holes sampling. It was estimated by the difference between actually used blast hole sampling protocol and its optimized version. (P. Carrasco WCSB1, Denmark 2003)

Inprocess control of drilling and blasting operations in

Inprocess control of drilling and blasting operations in openpit mines E. B. Shevkun Soviet Mining volume 24 , pages 356360 ( 1988 ) Cite this article

An Overview of the Open Pit Mining Process

Mar 02, 2016· Rehabilitation of the Mine. When the mineral in the open pit is depleted, the mine need to undergo rehabilitation. Some of the time, abandoned open pits are used as dumping for solid waste.

Surface mining planning and design of open pit mining

Jan 09, 2016· 9. open pit mining funnel shaped hole in ground, with ramp spiraling down along sides, allows moderately deep ore to be reached. Initial mining for zinc at Franklin and Ogdensburg, New JerseyUSA. Photo I took at Bingham. 4 km in diameter 1