Read Online Highwall Mining: Applicability, Design & Safety - John Loui Porathur | ePub
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Mining unit positioned outside the drive, in front of the highwall. Designed bucyrus superior highwall applicability: because it operates by remote control.
John (jack) de la vergne's hard rock miner's handbook is a work of the heart. Another approach is to determine applicable mining methods and develop a short list for detailed.
The book will equip readers in understanding the complex, multiple seam scenarios for highwall mining, and its design for maximum coal recovery from any given site with better economics, which will aid the mining companies in extracting locked-up coal following the safety norms to avoid hazards and minimise instability issues.
However, in order to introduce this mining system to open pit coal mines safely and efficiently, the adequate mining design considering n ot only stability of end-walls but also coal recovery ratio has to be investigated. This paper discusses the applicability of a highwall mining system for recovering plenty of coal left around the end -walls.
Cat® highwall mining system the industry-leading cat highwall mining system is a new, low-cost addition to traditional mining methods. The system can produce 40 000-110 000 tonnes (44,000 to 121,000 tons) of coal per month, depending on seam height. Capable of full operation with a three- to four-man crew, the cat highwall mining system.
Highwall mining is a hybrid of surface mining and underground mining methods, and is often the only feasible method to recover the coal reserves in the central appalachian coalfields due to the steep terrain and the closely spaced multiple thin coal seams.
Highwall mining layouts when designing a highwall mining layout, the mining engineer must specify 1) web pillar width, 2) number of web pillars between barrier pillars and 3) barrier pillar width. The design parameters are determined by the highwall miner hole width, the mining height and the overburden depth.
Surface and underground coal mining are broad activities that incorporate numerous highwall mining is an adaptation of auger mining. Into the area where holes have been drilled to fill holes with custom-designed explosive mixture.
In: porathur, john loui, roy, pijush pal, shen, baotang, karekal, shivakumar: books.
This comprehensive technical book on highwall mining covers theory and practice coupled with practical examples and design aspects. It also summarizes the results of research carried out by the csir central institute of mining and fuel research (csir-cimfr), india and the commonwealth scientific and industrial research organisation (csiro), australia on the subject.
Highwall mining is actually a hybrid of surface and underground mining technologies. It is a people-free, low footprint mining process which uses high power hydraulic cylinders as part of a pushbeam transfer system. In this system, high power hydraulic cylinders advance the cutterhead into the coal seam on the highwall.
▫ in india, in developing stage and cimfr is committed to develop guidelines for highwall mining.
Paul hartcher and grand case, the experience of addcar in highwall mining operations, in naj aziz and bob kininmonth (eds. ), proceedings of the 2019 coal operators conference, mining engineering, university of wollongong, 18-20 february 2019, 103-116.
Of the stability of highwalls in open-pit coal mines in the fort union. Formation of the the problem of safe pit-slope design must be considered in any analysis the predicted slope behavior to determine the accuracy and applicabil.
The two most significant ground control hazards to face highwall mining operations are rock falls from the high wall and equipment entrapment underground.
Apr 27, 2016 applicability of the technology when the open pit mining has reached beyond the stripping ratio or the limit of mining operations.
This comprehensive technical book on highwall mining covers theory and practice coupled with practical examples and design aspects. It contains eight extensive chapters elaborating broad-spectrum functionalities of highwall mining and its operational aspects, covering world scenario, economic potential, methods of coal extraction, design methodology including empirical web pillar design.
Highwall mining involves the recovery of coal reserves from coal seam(s) that outcrop either naturally or from being exposed through earth removal operations, such as strip mining. Typical highwall mining systems are con trolled from the bench and have no people underground,.
This paper discribes the applicability of the longwall mining system from final highwall and its suitable design taking the slope stability into consideration by means of three-dimensional explicit finite-difference program flac 3d producted by itasca.
As mining advances and mine design standards undergo operational changes, it is crucial any geotechnical assumptions be reviewed and modified by an experienced engineer or geologist to continuously ensure the integrity of the final highwall design and reduce the likelihood of highwall instability and rock-fall hazards.
Highwall stability can be maintained, and highwall mining production optimized by applying design criteria in creative ways, including alternating miner penetration depths and initiating mining of thick seams toward the bottom of the seam.
Pillar design is of paramount importance to any underground mine design. Oversized pillars may lead to loss of coal while undersized pillars may lead to instability. While underground pillars are mostly square and rectangular, highwall mining pillars are long and narrow, as they are formed after driving parallel entries in the seam from the highwall.
Jun 5, 2018 optimization of the mine design factors is arguably the primary means for pressure arch theory may be more applicable than pressure bulb.
Highwall mining is used to mine coal from underneath the inal highwall, when the strip limit is reached due to economic reasons or surface conditions • contour mining: in a mountainous area, the cat highwall mining system can follow a coal seam along the side of the hill • trench mining: the unit mines coal from both sides of a purpose-prepared.
(aai) personnel have the highwall mining experience and expertise to optimize coal recovery while promoting safety at your coal property. Aai applies operational experience, empirical relationships, and numerical modeling analyses to develop designs that.
Why consider a highwall miner rental? the hw300 highwall mining system is a machine designed to optimize highwall coal mining.
Porathur and others published highwall mining - applicability, design and safety isbn: 978-1-138-04690-0 find, read and cite all the research you need on researchgate.
Hw300 highwall mining system the hw300 produces high volumes of coal at very low costs. More importantly, it is safer than traditional underground mining, as it sends no one underground, and it works economically with a small crew and very little support equipment.
Discussion on design fires in mines: applicable criteria, fire behaviour, human factor, fuel configuration and transient fuels.
Plan must be designed and conducted in a manner to support the highwall decision (either leave reclamation plans that propose leaving unaltered highwalls after mining has ceased.
This book was designed to assist mining operations who are regulated by msha's. Part 46 you may substitute, as applicable, health and safety training required by the working in areas of highwalls; water hazards, pits, and spoi.
Highwall stability is a complex issue that is dependent upon a variety of mining and geologic factors, and a safe design is necessary for a successful surface operation. To improve highwall stability, it is important to understand the connection between local geology and blasting.
Highwall mining systems can sometimes be the final mining method used in open cut mines, or it can serve as a means of transition, with low capital cost, from surface mining to underground mining. From the results of a series of laboratory tests and numerical analyses, stability of openings/pillars in the auger mining system is higher than that.
Introduction high wall is the unexcavated face of exposed overburden and coal in a a surface mine. high wall mining is a remotely operated mining method to extract coal from thin seams or underlying seams in the high wall. in this method extraction of coal is done from a series of parallel entries driven in the seam from the face of the high wall without roof support. this technology provides an economical way to extract coal reserves locked up in the high wall.
5m thick seam with 50% recovery from highwall mining operations thus typically yields 1 million tonnes of coal for average penetration depths of 400m. Clearly correct layout design is important, because an extra 1% improvement in recovery from the highwall mining operation. Yields another 20,000 tonnes of coal, worth up to a$1 million.
Jul 20, 2016 note: mining techniques are applied to extract metallic, non most of the mining terminologies will be introduced where they are most applicable. Benches are designed to accommodate the materials-handling equipmen.
The aim of the report is to provide general guidelines for highwall mining design. The guidelines will help guide mining engineers through the process of feasibility evaluation to final execution of highwall mining in their mining lease.
3 msha standard statistical measures have been designed to measure rates of occurrence of injuries or activity between machinery or equipment and the highwall or bank.
Associated with highwall mining and requires each highwall operation to develop and follow 'an high wall ground control plan, which addresses the web spacing and other measures necessary to safely the high rates of recovery. ' proper pillar design is essential to maintain highwall stability and to prevent entrapments.
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