Although not accessible by open pit mining, the deeper mineralization at Oromonte may be amenable to underground extraction should further results support underground development. Historical underground workings occur in the Wedge deposit area approximately 180 meters to the east.

Historical work indicated additional potential on the property below the pit resource. Exploration drilling by McEwen Mining confirmed that significant potential for underground highgrade gold mineralization continued to a depth of approximately 4,000 feet.

NPV Scheduler provides a complete strategic open pit mine planning system with functionality spanning everything from pit optimization, pushback generation, cutoff grade optimization, scheduling, haulage optimization and stockpile management.

Underground Development. Oyu Tolgoi consists of a series of deposits containing copper, gold, and silver. The deposits stretch over 12 kilometres, from the Hugo Dummett North Zone in the north through the adjacent Hugo Dummett South Zone, down to the Oyut Deposit, extending to the Heruga Deposit in .

Ore body geometry determines whether mining takes place underground or in an open pit. In underground mines we reached the ore by means of ramps and drifts. Holes are drilled in the ore and filled with explosives in the same way as in open pit mines.

The boundary between openpit and underground mining is determined in general form by equating the corresponding (2) of a unit of coal extracted in openpit and underground mining, respectively.

There are different phases of a mining project, ... especially if access roads cut through ecologically 1. Overview of Mining and its Impacts1 ... scale mining projects involve openpit mining, many large underground mines are in operation around the world.

When underground mining became too costly in the 1950's, Berkeley Pit became an open pit mine. As the mine grew bigger and deeper, groundwater began to seep into the pit, and pumps had to be installed to keep it from slowly flooding.

This mine is also exploited by openpit mining, where the height and slope of working benches are m and º, respectively. The angle of overall slope ranges from 32º to 34º. The distance of crusher to mine .

importance of mine surveying in mining industry Mine surveying is a specialist area of surveying involving the measurement, representation and management of data associated with a mining operation. Mine surveyors are responsible for marking out, measuring and maintaining direction of all surface and underground workings on a mine site.

We are the special forces of tunnel blasting and open pit mining. Our areas of expertise include demanding quarrying work, reinforcement work and concrete construction. Our Kalliorakennus team combines rock solid expertise and decades of experience – we go through solid rock.

Open pit mining, where material is excavated from an open pit, is one of the most common forms of mining for strategic minerals. This type of mining is particularly damaging to the environment because strategic minerals are often only available in small concentrations, which increases the amount of ore needed to be mined.

"The assessment of mining an open pit through underground workings takes on new meaning if you could actually 'see' the workings. Even from an office environment, users can be immersed in the underground operation tracking the locations of all people and assets within the mine in realtime."

Choosing between openpit mining and underground mining is a decision that every mining company makes, but it is not based on the miner's whim and predilection. Selection always depends on the geometry properties of the deposit, its position, location, and type.

Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, usually those containing metals such as ore containing gold, silver, iron, copper, zinc, nickel, tin and lead, but also involves using the same techniques for excavating ores of gems such as diamonds or rubies.

Openpit mining strips away the topsoil and rock that lie above the uranium ore. When uranium is found deep underground, miners must dig underground mines to reach it. The rock is then removed through underground tunnels.

Table 3: Energy consumption for openpit and underground mining Crushing (80% less Openpit mining Underground mining than 15 mm) 510 kw/t raw material 2050 kw/t raw material 25 kw/t treated material Based on the data of table 3 and a number of previous studies, most surface (openpit) operations require 5 to 10 kwh energy equivalents/ton of ...

In 1984, Summitville Consolidated Mining Company, Inc. (SCMCI), initiated open pit mining of gold ore from rocks surrounding the historic underground workings, where gold concentrations had been too low to be economic for the underground mining operations.

Technologies in Exploration, Mining, and Processing INTRODUCTION The life cycle of mining begins with exploration, continues through production, and ends with closure and postmining land use.

Open pit mining does offer some advantages over traditional deep shaft mining. Pit mining is more cost effective than shaft mining because more ore can be extracted and more quickly. The working conditions are safer for the miners because there is no risk of cave in or toxic gas. Open pit mining .

In 1984, Summitville Consolidated Mining Company, Inc. (SCMCI), initiated open pit mining of gold ore from rocks surrounding the historic underground workings, where gold concentrations had been too low to be economic for the underground mining operations.

When ore is located more than 100 metres below the surface, underground mining methods are more economical than mining by open pit. The first step in underground mining is to access the ore. First, miners dig vertical shafts to the depth of the ore, then cut a number of tunnels around the deposit.