(PDF) Ch. 74 / Techniques in Underground Mining TECHNIQUES ...
Mucking is done with (load-haul-dump) LHD vehicles (see figure 74.10) with a bucket capacity of about 3.0 . Muck is hauled directly to the ore pass system and transferred to truck for longer hauls. Ramps are passageways connecting one or more levels at grades ranging from 1:7 to 1:10 (a very steep grade compared to normal roads) that provide ...
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Shaft sinking. 1. Akshay S Krishna VNIT Nagpur. 2. Mining the mineral deposits Temporary storage and treatment of sewage Bridge and other deep foundations Hydraulic lift pits and Wells In conjunction with tunneling system or network for the purpose of lifts, escalators,stair and ladder- ways,Ventilation, drainage and pumping.
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Shaft Boring Machine (SBM) - Herrenknecht AG
In the second step, it rotates 180° around the vertical machine axis to cut out the entire shaft profile. The cutting wheel not only loosens the rock, it also works in a similar way to a bucket wheel for collecting the muck. The rubble is directed to the center via integrated muck chutes.
Optimization of mucking and hoisting ... - MINING REPORT
Optimization of mucking and hoisting operation in conventional shaft sinking. Ausgabe 01_2015. T he mostly applied shaft sinking method is conventional shaft sinking by drilling and blasting. Using this method, almost any shaft geometry is feasible and challenging ground conditions can be sunk through with acceptable sinking performances.
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However, to facilitate design of mining excavation equipment where there is complex interaction between the bucket and the muck pile, which is made up of pieces of rocks of different sizes, it is important to assess whether simple similitude approaches such as the Buckingham Pi theorem [24,25,26] can adequately predict key parameters without ...
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The bucket lips at the periphery (shown in Figure 3(1)) are arranged so that the buckets pick up the cuttings from the bench during the rotation of the cutter wheel. Once in the buckets, the rotation of the wheel lifts up the muck which starts at a certain position to slide along internal muck channels towards a stationary muck ring–hopper
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With the Joy vertical shaft mucker (VSM-14), the process for removing muck is now considerably simpler and safer. The VSM-14 significantly improves operational safety since the single operator control allows for a pared-down team at the shaft bottom during the mucking process. This means much faster cleaning, resulting in an overall reduction ...
Mine Haulage | PDF | Rail Transport | Mining
From time to time the mining engineer is faced with the necessity to make a haulage study to determine not only the most suitable method of hauling materials, but also the most effective and economical type of equipment to use for the operation. Typical Haulage Steps to move muck from a stope to surface The ore is drilled and blasted in the stope.
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The excavated rock is then conveyed from the bench by an innovative pneumatic mucking system and transferred into muck buckets to be hoisted to the surface. Project-specific optimization Since the project-specific design changes at Jansen required modifications to the SBRs, Herrenknecht together with DMC Mining Services refined the SBR ...
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Shaft construction - QueensMineDesignWiki
Sinking buckets are used to lower personnel to the working face of the shaft as well as remove any muck produced by drilling and blasting. During sinking the bucket size should be at least big enough to fill size loads of each foot to be sunk. For the bucket to be stable during the sinking process the width to height ratio should be 2:1.
Mine Shaft Sinking Methods
Conventional mine shaft sinking methods involve the performance of a cycle of different operations—drilling and blasting, removal of smoke and cleaning of fly-rock lodged on overhead timbers, mucking and hoisting of the broken rock, and timbering. The latter (a) may be the last operation of the cycle, (b) may be carried on during drilling and mucking, provided it is …
Shaft boring machine and method - The Robbins Company
An excavating unit for muck removal is mounted opposite the cutterwheel on the slewing base frame and loads directly from the shaft bottom into a muck hopper. When the hopper is full, it is discharged into a hoist bucket which is hoisted to the surface. The machine is positioned in the shaft by upper and lower gripper systems.
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The Journal of The Southern African Institute of Mining and Metallurgy VOLUME 113 OCTOBER 2013 797 Table I Muck level monitoring systems in Canadian orepasses, after Hadjigeorgiou et al. (2005) Type Comments Direct Visual Evaluation of the muck level is performed periodically by supervising personnel. Inaccurate. Cannot be automated
Longitudinal longhole retreat - QueensMineDesignWiki
This will give the percentage of muck in each LHD bucket. Unplanned ore dilution is a result of stope properties, rock mass characteristics, blasting patterns, and the geometry of the orebody. [8] In considering stope stability in longitudinal mining, the hanging wall is the face that will be most affected by unplanned dilution.
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(PDF) lecture 4 - mine transportation.pdf | Innocent Haule ...
Lecture 4 MINE LOADING AND TRANSPORTATION Introduction Once the rock has been fragmented it needs to be moved to its final destination which could be a waste rock muck pile or ore's stock pile to feed the processing plant. From the working face materials are loaded with the use of any of the mucking units into a conveyance which carries it through horizontal, inclined, …
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mining engineering: Shaft Sinking
• You can load a tall bucket using a 630 if you slope the muck pile so that the bucket sits at an angle from the vertical position. Source: Fern Larose • In a wet shaft, the contractor should be able to bail up to 10 buckets of water per shift without impeding his advance.
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Like many apparently simple devices, the vertical water wheel has been around for so long that it is taken for granted. Yet this "picturesque artifact" was for centuries man's primary mechanical source of power and was the foundation upon which mills and other industries developed.Stronger than a Hundred Men explores the development of the vertical water …
Underground Mining 2012 - MineralsEd
vertical shafts created by mining ore. ... 9 ‐Blasted ore, referred to as muck, is mucked out, that is, scooped up and loaded into carts by ... 15 –At the shaft, the ore is dumped into a large bucket called a skip. The skip, which is somewhat like an elevator car, is …
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Mine Shaft Sinking Methods
By making the cut under the hoisting compartment and mucking it out first, the bucket may be lowered into it, making mucking from the benches less arduous. Sometimes a V-cut is drilled across one end of the shaft, blasted, and
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LHD Loader,Load-Haul-Dump Loader,Mucking Equipment
The movement of the muck through a horizontal or included path is called "haulage" and its movement through a steep incline or vertical path is known as "hoisting." For example, surface mining excavation haulage of muck is standard, but hoisting is not as much. With underground mining, removal of muck entails both haulage and hoisting operations.
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MODERN CONTINUOUS HAULAGE SYSTEMS
Continuous mining and conveyor based haulage systems have had worldwide use since beginning of the twentieth century. Conveyor haulage has been dominant in underground coal mines, potash, soda ash, and salt mines, since the 1950's. The conventional drill, shoot, load methods of mining consistently resulted in a conveyable product. The later
Vertical - Robbins
Get the Muck Up and Out When you are tunneling from a vertical shaft, the right muck removal solution is crucial. Without an efficient vertical conveyor system, the entire excavation process can be held up. Robbins' vertical conveyor systems can move high volumes as quickly as our horizontal systems. Vertical Conveyors Robbins' vertical conveyors can […]
Techniques in Underground Mining - ILO Encyclopaedia
Protecting the health and safety of the workers is a major consideration in properly conducted mining operations and, in most countries, is required by laws and regulations. ... (see figure 2) with a bucket capacity of about 3.0 m 3. Muck is hauled directly to the ore pass system and transferred to truck for longer hauls. ... Vertical crater ...
Underground hard-rock mining - Wikipedia
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.It also involves the same techniques used to excavate ores of gems, such as diamonds and rubies. Soft-rock mining refers to the excavation of softer …
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Sinking what is now the deepest single-lift shaft in the U.S., Resolution Copper is using brute force engineering to finish the project. In 1995, one of the great copper ore discoveries of the last 100 years occurred in the heart of Arizona's Copper Triangle, and today the Resolution deposit represents one of the largest undeveloped copper ...
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Underground Mining Methods - UFRGS
Post room-and-pillar mining (Figure 1.3) applies to inclined ore bodies with dip angles from 200 to 550. These mines have large vertical heights where the mined-out space is backfilled. The fill keeps the rock mass stable and serves as a work platform while the next ore slice is mined. Step room-and-pillar mining (Figure 1.4) is an adaptation of
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