Evaluation of the structural integrity of aging mine shafts
The slam load increases with increasing speed; L is the bunton spacing. The slam load is inversely proportional to bunton spacing. ... Download full-size image; Fig. 3. Shaft steelwork analysis model for case study 1. 5.1. ... this paper has given a rational method of evaluating the condition of existing mine shafts and providing guidance on a ...
Mine hoist systems
rope friction hoists are a common mine hoist solution. For deeper mines, drum hoists of various designs are a common solution. Drum hoists are also often used in shallow mines and for transporting personnel and equipment. 1000 0 2000 3000 Depth Production Single drum Double drum Single skip friction Double skip friction
Mine shafts and winding systems
This code applies to all mine shafts and winding systems in underground mines, including shaft sinking winding systems, emergency egress winding systems, people and material winding systems and material winding systems where people may be lifted (e.g. for shaft inspections or
What Is a Mine Shaft?
Shaft mining is an excavation method used to access an underground ore body from the top down. The term "shaft" refers to the vertical tunnels sunk underground for mining and engineering projects.. When the opening starts on the surface, the resulting tunnel is called a shaft. If the vertical tunnel starts underground and pushes upward, it's called a sub-shaft.
Mine Shaft Sinking Costs
Costs of sinking a mine shaft vary with the size and depth of the shaft; nature of the rock (the ease with which it can be drilled and broken, and the nature 911 Metallurgist is a trusted resource for practical insights, solutions, and support in mineral processing engineering, helping industry professionals succeed with proven expertise ...
Underground haulage selection: Shaft or ramp for a …
These situations force the mine managers to compare the skip/shaft hoist and ramp-truck haulage systems for their existing and potential operations. One of these mines is ... the hoist speed is to be 2.3 m/sec and size of shaft has to be 3.4 m x 2.4 m = 8.16 m2. There must be main haulage levels for each 30 m interval. The size of
Skip
Mine Shaft Systems. Excavating. Feeding. Flotation. Skip. Our skips, regardless of size or style, are designed for fast and clean dumping of ores, in all kinds of metallic and non-metallic mines. Our skips are available in steel, more weight …
Product datasheet Mine Shaft Skips
Mine Shaft Skips are the preferred method for carrying ore to the surface from deep underground ore zones, but not all skips are the best fit for every application. Drawing from more than 80 years of experience, we offer a complete range of mine shaft skips to ensure you find the right fit for …
Conditions That Determine Changing the Function of Mine Shafts …
Font Size: Aa Aa Aa. ... Solution 2—converting the shaft hoisting from skip hoisting to cage hoisting for transporting long elements, and the removal of skip hoisting from the second compartment; ... "Conditions That Determine Changing the Function of Mine Shafts in a Gassy Coal Mine—A Case Study" Energies 17, no. 6: 1379. https://doi ...
Vertical Shaft, Types and Functions of | SpringerLink
Vertical shaft is an upright shaft excavated for mining activities. There are exposed shafts and blind shafts, generally with a circular section. ... According to the hoisting container equipped in the shaft, the shafts are divided into cage shafts, skip shafts, and combined shafts. ... the size of the plane layout between pipelines, cables and ...
Geotechnical Design Considerations For Mine …
The design, development and operation of a shaft system is a critically important element in mining, and needs specialised technical input. Experience has shown that the consequences of damage to shaft systems caused by geotechnical …
Mining Headgears
The 21st century has introduced new mines, which operate dual shaft systems which plunge in the region of 3100 metres below the surface; they are South Deep near Westonaria and Moab Khotsong (Vaal Reefs No. 11 Shaft) …
Mineshaft Monitoring
For instance, all guides must be perfectly aligned as the vertical speed of conveyances e.g. 50-t skip can reach 12-18 m/sec. The description of the existing problem. Every mine shaft must be stopped for 4-12 hours (depending on the shaft depth) …
Shaft Mining | Encyclopedia MDPI
Shaft mining or shaft sinking is excavating a vertical or near-vertical tunnel from the top down, where there is initially no access to the bottom. ... Content Size Created at Operation; 1: ... The second compartment is used for one or more skips, used to hoist ore to the surface. Smaller mining operations use a skip mounted underneath the cage ...
Mine Shaft and Drift, Types of
Mine shaft and drift are the passage and space dug for mining lifting, transportation, ventilation, drainage, power supply, etc., to maintain the normal production of the mine. According to the relationship between the drift axis of shaft and horizontal plane, it is divided into vertical shaft, inclined drift, and horizontal drift.
Minerals industry safety handbook
Underground Mining–Shaft Equipment. 6.2.1 DRUMS AND SHEAVE WHEELS Drums and sheave wheels should be designed and manufactured in accordance with AS 3785 Underground Mining–Shaft Equipment. 6.2.2 FENCING, GATES, SHAFT ENTRANCES SUPPORTED All shaft entrances from the bottom of every shaft to the head sheaves should have proper
Mine Shaft Sinking Methods
New shafts at operating mines are often raised instead of sunk. Raising eliminates the expense of mucking and pumping and the delays incident to hoisting the muck through the shaft. In raising, the shaft usually is carried from one level of the mine to the next in lifts of 100 to 200 or, in rare instances, 300 to 600 feet.
Slamming analysis of skips in mine shafts: the effect of …
Previous investigations into the dynamics of skips in deep mine shafts have led to the identification of slamming as a phenomenon that results in exceptionally high forces in the shaft steelwork and conveyance. Slamming may occur when the rollers on the skip, that normally act on the guide, fail. Possible damage caused to the shaft steelwork, as a result of slamming, limits …
Mine Shaft Sinking Equipment
The conventional method of mucking is to shovel by hand into a sinking bucket or small skip. In large, deep shafts it is necessary to hoist in buckets or skips of relatively large capacity to reduce the hoisting time. ... Slow-speed hoists sometimes are employed for starting the shaft and are replaced by higher-speed hoists after the shaft has ...
Shape of Mining Shafts
SHAPE AND SIZE OF SHAFTS; SPEED OF SINKING; TUNNELS. SHAPE OF SHAFTS.--Shafts may be round or rectangular.[*] Round ... carry mine cars and handle the same load as a skip must either be big enough to take two cars, which compels a much larger shaft than is necessary with skips, or they must be double-decked, which ...
Development of Vertical Shaft Skip and Guide Designs
Development of Vertical Shaft Skip and Guide Designs - Free ebook download as PDF File (.pdf), Text File (.txt) or read book online for free. This report summarizes research on improving the design of vertical shaft skips and guides used in mines. Key areas examined include testing new guide geometries, advanced suspension systems like spherical guide rollers, and modeling the …
Design of Mine shafts
610 Design of Mine Shafts By Dr Isadore Irvin Matunhire, Pr Eng., FSAIMM, MSACMA, MAMMSA Department of Mining Engineering, University of Pretoria, Pretoria, South Africa Abstract Many underground operations consist of several tunnels acting as accesses, haulages, production levels, and airways but there is only a limited number of shafts that can be developed for any …
Tutorial:Mining
Layout 2 [edit | edit source]. Another option is the per-chunk branch mine. This is a 2 space branch mine, but is constructed over the space of a single chunk, and is capable of ensuring that every ore deposit is found, while still only mining around 45% of the chunk's stone.For the initial shaft to bedrock for this mine, a 1×2 shaft will fit lengthwise in the central …
Section skip shaft in the zone of movement of rocks.
The article deals with the monitoring of the technical condition of the equipment of mine shaft lifting rigs that have been in operation for more than 50 years in rock movement zones.
Skip
Our skips, regardless of size or style, are designed for fast and clean dumping of ores, in all kinds of metallic and non-metallic mines. Our skips are available in steel, more weight efficient aluminum, corrosion-resistant stainless steels or a …
Calculated skip capacity based on typical mine hoisting …
Starting with typical parameters for a mine hoisting rope, Figure 4 shows how skip capacity varies with depth and reduction in rope mass per unit length. Note that each line on the graph is for an ...
size of a mining cage or skip
Skip Sizes Skips come in a range of sizes, dimensions and shapes, with a selection different accessories available. Choosing the right size and type of skip for your requirements can save …
MINE SHAFT CAGE DROPS + HOISTS
Last deep mine I worked down in the UK before I left was CPL's Boulby Mine, No2 shaft had guide ropes with two cages, No1 shaft had steel work in the shaft carrying guide rails for high speed winding of the two 20 tonne skips for hoisting mineral.
Skip sizes | Coal, Colliery and Mining Forum.
Skip Navigation. Home Help Search Welcome Guest. Please Login or Register. Coal, Colliery and Mining Forum. Winding Engines, Ropes and Shafts. Skip sizes. Mining …
Complete mine shaft equipment from FLS
Effective mine shaft equipment selection is a key factor in keeping efficiency high and workers protected in underground mining. Our complete and customisable range of headframe and …