Specific and Non-Specific Hazards in Underground Mines

Jan 25, 2019· Induced Seismicity: Mines located in seismically active regions, such as the Andean region — also known to be one of the wealthiest metallic mining zones in the world — are particularly at risk. Especially dangerous in underground mining areas, mine-induced seismicity also causes slope instability in surface mining.


Chapter 18 Refrigeration Plant and Mine Air Conditioning Systems Malcolm J. McPherson 18- 2 18.1. INTRODUCTION One of the earliest methods of temperature control in underground mines was the importation of naturally produced ice from the surface. Blocks of …

Coal mining | Britannica.com

Coal mining, extraction of coal deposits from the surface of Earth and from underground. Coal is the most abundant fossil fuel on Earth. Its predominant use has always been for producing heat energy. It was the basic energy source that fueled the Industrial Revolution of the 18th and 19th

Design of Surface Mine Haulage Roads - A Manual

Design of Surface Mine Haulage Roads – A Manual By Walter W. Kaufman and James C. Ault ABSTRACT This Bureau of Mines manual for design of surface mine haulage roads covers such aspects of haulage road design as road alignment (both vertical and horizontal), construction materials, cross slope, and drainage provisions.

Application of Tunnel Boring Machines in Underground Mine ...

underground hard rock mining and allowed the mine to meet its accelerated schedule for the development of the new orebody. 2.2 Stillwater Mine, Montana Stillwater Mining Company (SMC) is developing a second underground palladium and platinum mine about 21 km west of their existing Nye operation in Montana. A 5,650-m tunnel is required to gain

Placer mining - Wikipedia

Placer mining / ˈ p l æ s ər / is the mining of stream bed deposits for minerals.This may be done by open-pit (also called open-cast mining) or by various surface excavating equipment or tunnelling equipment.. Placer mining is frequently used for precious metal deposits (particularly gold) and gemstones, both of which are often found in alluvial deposits—deposits of sand and gravel in ...

Underground loading and underground trucks — ...

All underground loaders and trucks incorporate carefully designed and built-in features to improve safety in underground operations. Underground loaders: taking the strain. LHDs (Load, Haul and Dump) handle the toughest of underground applications. The loaders are highly maneuverable and give exceptional productivity.


Chapter 9 Mine Ventilation Systems Practical Mine Ventilation Engineering 6. Line Brattice/Vent Tubing As a short term measure, fire-resistant line brattices may be tacked to roof, sides, and floor in underground coal mines to provide temporary stoppings where pressure differentials are low in and around working areas.

Tunnelling: Mechanics, methods, and mistakes

Tunnelling: Mechanics and hazards Jim St. Marie. Introduction. A tunnel is a long, narrow, essentially linear excavated underground opening, the length of which greatly exceeds its width or height. (Walhstrom, 1973). In contrast, a cavern is an underground opening whoselength and …

Dust Sampling Instrumentation and Methods

Sep 28, 2010· Dust Sampling Instrumentation and Methods Jay Colinet Office of Mine Safety and Health Research ... • Measurement principle does . not. respond to ... use in underground coal mines • New CFR 30, Part 74 rule enacted in 2009

Underground Mining Transportation Systems

Underground mines have changed their operation systems in accordance with the evolution of equipment, the system and method of mining. Transport is also of critical importance in underground mines as is the mining operation itself. The underground transport system of ores, materials, equipment and persons has been developed from


and weapons. By the New Stone Age,humans had progressed to underground mining in systematic openings 2 to 3 ft (0.6 to 0.9 m) in height and more than 30 ft (9m) in depth (Stoces,1954). However,the oldest known underground mine,a hematite mine at Bomvu Ridge,Swaziland(Gregory,1980),is from the Old Stone Age and believed to be about 40,000 years old.

Underground Mining Transportation & Haulage Systems

Another underground conveyor belt that was also used in connection with open-pit mining operations was installed at the New Idria mine. This is probably one of the earliest installations in an underground metal mine. It was employed principally to convey waste from the hanging wall of the ore deposit to a …

Principles of rockbolting design - ScienceDirect

This article introduces the principles of underground rockbolting design. The items discussed include underground loading conditions, natural pressure zone around an underground opening, design methodologies, selection of rockbolt types, determination of bolt length and spacing, factor of safety, and compatibility between support elements.

Estimates of Electricity Requirements for the Recovery of ...

Bleiwas, D.I., 2011, Estimates of electricity requirements for the recovery of mineral commodities, with examples applied to sub-Saharan Africa: U.S. Geological Survey Open-File Report 2011–1253, 100 p.


May 14, 2013· PRIMING OF EXPLOSIVES FOR EFFICIENT BLASTING By: Partha Das Sharma 1. INTRODUCTION: The massive use of blasting agents such as ANFO, Heavy ANFO etc., in rock breakage has brought about an important development of initiation and priming techniques. This is due to, on one hand, the relative insensitivity of these compounds and, on the other…

Mining - Underground mining | Britannica.com

Mining - Mining - Underground mining: When any ore body lies a considerable distance below the surface, the amount of waste that has to be removed in order to uncover the ore through surface mining becomes prohibitive, and underground techniques must be considered. Counting against underground mining are the costs, which, for each ton of material mined, are much higher underground than on …

(PDF) Mining Methods: Part I-Surface mining

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How Underground Mining Works | HowStuffWorks

Underground mines are the alternative to surface mines. Surface mines excavate from the top down, a method that can become inefficient at depths greater than about 200 feet (60 meters) [sources: Illinois Coal Association, De Beers].Undergrounds coal mines can drive 2,500 feet (750 meters) into the Earth and other types even deeper -- uranium mines can reach 6,500 feet, or 2 kilometers.

strata monitoring Instrumentation - SlideShare

May 06, 2011· Underground Strata Monitoring Vibrating Wire Load cells The load cell is a transducer working on vibrating-wire principle. It has three stretched wires housed in a metal cylinder, which are plucked by anelectric pulse of high energy.

Regulations | Mine Safety and Health Administration (MSHA)

MSHA is responsible for enforcing the Federal Mine Safety and Health Act of 1977 (Mine Act) as amended by the MINER Act of 2006. The Mine Act gives the Secretary of Labor authority to develop, promulgate, and revise health or safety standards for the protection of life and prevention of injuries in the nation's mines.

Principles of Longwall Mining - YouTube

Apr 12, 2016· This video provides a basic description of the long-wall mining method for extracting coal underground. It includes an explanation of the different products/key components of a long-wall mining ...

Vol. 3, Issue 10, October 2014 Analysing the Benefits of ...

underground coal mining is presented. II. ... Value Steam Map for a mining operation have separate maps and action plans for drill and blast, load / haul, ... In applying lean principle into mining industry, one should understand that lean principle is an operating philosophy in

Ventilation and Cooling in Underground Mines

Ventilation and Cooling in Underground Mines " DISCLAIMER: The ILO does not take responsibility for content presented on this web portal that is presented in any language other than English, which is the language used for the initial production and peer-review of original content.

Underground Mining Methods and Equipment

UNESCO – EOLSS SAMPLE CHAPTERS CIVIL ENGINEERING – Vol. II - Underground Mining Methods and Equipment - S. Okubo and J. Yamatomi ©Encyclopedia of Life Support Systems (EOLSS) 2. Strength of the hanging wall, footwall, and ore body. 3. Economic value of the ore and grade distribution within the deposit.

Ground Engineering - Principles and Practices for ...

into one of writing a textbook that aims to provide ground engineering principles and practices associated with underground coal mining at a tech-nical level and in a language and format appropriate to ground control practitioners and to those that engage with these practitioners. The text is written by a mining engineer with a specialist ...

pwc.com.au Productivity and Cost Management

Drill Blast Load Haul Slide 8 PwC Asia School of Mines 2012 November 2012 . PwC Having a better blast Drill Blast Load Haul Slide 9 PwC Asia School of Mines 2012 November 2012 . PwC Getting one stage wrong leads to inefficiencies in the ... Productivity and cost management in the mining …

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