what is dusting mining


 · Rock dusting problems are universal to the coal industry and applicable to all operating underground bituminous coal mines. An explosion can propagate with as little as 0.01 inches of float coal dust on top of pure rock dust, suggesting the need to simultaneously apply rock dust as the mining …


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Glossary of Mining Terms

A. Abutment - In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back abutment, that is, the settled packs behind the face.


The properties of the stone dust used in the inertisation of coal dusts are extremely critical. Stone dust is heavier than coal dust, and not as easily lifted into suspension in the air. The dust must be fine enough to be lifted in sufficient quantities to inert the suspended dust mixture.

Mine dust and you

Particulate matter from mining. The vast majority of dust from mining activities consists of coarse particles (around 40 per cent) and particles larger than PM10, generated from natural activities such mechanical disturbance of rock and soil materials by dragline or …

Chat (mining)

Chat is fragments of siliceous rock, limestone, and dolomite waste rejected in the lead-zinc milling operations that accompanied lead-zinc mining in the first half of the 20th century. Historic lead and zinc mining in the Midwestern United States was centered in two major areas: the tri-state area covering more than 2,500 square miles (6,500 km 2) in southwestern Missouri, southeastern Kansas ...

[Solved] 10. What is ''pillaring'' and ''retreat mining'' and ...

Rock dusting is the process used by miners to prevent the heating of coals by using powder limestones underground. It is very important to avoid the increse of energy in the coals which may lead to explosion.

What is MDLD? | Miners'' health matters

The dust particles created by mining fall into two size categories, each with different effects on the human body. It''s exposure to high volumes of ultra-fine respirable dust over an extended period of time that can lead to the development of mine dust lung disease.

Definition of stone dusting

Definition of stone dusting. The systematic distribution of stone dust along mine roadways to cover the coal dust and reduce its flammability. Although stone dusting may not always stop an explosion, it is less violent with stone dusting than without. Safety regulations in many countries require that stone dust be applied either mixed with the ...

Auxiliary ventilation in mining roadways driven with ...

 · Dust generated by roadheaders, when advancing mining roadways, is a hazard to the health and safety of coal workers since they breathe polluted air causing pneumoconiosis. What is more, there is a decrease in productivity due to the fact that the Mine Safety regulations in Spain limit the presence of personnel at the work face by up to 66% ...

Bauxite Mining''s Negative Effects on Human and Environment ...

 · Bauxite mining can pollute the air, water and soil, thus directly affecting the environment. Air pollution The substances produced during the bauxite mining process include dust, sulfur dioxide (SO2), and nitrogen oxides (NOx). The mining and beneficiation of bauxite do not involve the use of chemical reagents and produces no odors.

Lowering Miners'' Exposure to Respirable Coal Mine Dust ...

 · The term normal production shift is redefined to require that underground mine operators take respirable dust samples in the mechanized mining unit (MMU) when production is at least 80 percent of the average production over the last 30 production shifts. The MMU is a unit of mining equipment used in the production of material.

Non-compliant stone dust supplied to underground coal …

Stone dust is a critical control in the mitigation of coal dust explosion in underground coal mines. The use of non-compliant stone dust exposesmine workers to an unacceptable risk in the event of a coal dust explosion. Mine operators have an obligation under clause 9 . Work Health and Safety (Mines and Petroleum Sites) Regulation 2014

Stone Dusting Process Advance

The coal mining industry has, for many years, used dry stone dust or calcium carbonate (CaCO 3) in the prevention of the propagation of coal dust explosions throughout their underground mines in Australia.. One of the major limitations of dry stone is the interruption to production when applied in intake airways.

The Role of Arsenic in the Mining Industry

[1] The rate of arsenic release from sulfide minerals can be accelerated by mining activities, which expose the minerals to weathering processes during excavation. [1] Arsenic oxide dust is produced during copper and gold smelting, and coal combustion. [8] …


Coal dust explosions in underground coal mines are prevented by generous application of rock dust (usually limestone). If an explosion should occur, the rock dust disperses, mixes with the coal dust and prevents flame propagation by acting as a thermal inhibitor or heat sink.

Dust Control & Suppression in Quarries & Mines | Dustech LLC

Dust Control in Quarries & Mines. Quarrying generates large amounts of mineral dust that can be hazardous to people and natural resources. At Dustech, we develop non-toxic, liquid dust suppression blends that reduce dust during mining operations.

Best Practices for Dust Control in Metal/Nonmetal Mining

silica dust continue to occur for miners in metal/nonmetal mining operations. From 2004 to 2008, the percentages of samples that exceeded the applicable respirable dust standard for the different mining commodities were: • 12% for sand and gravel • 13% for stone • 18% for nonmetal • 21% for metal

Stoping | mining | Britannica

Stoping, in mining engineering, the opening of large underground rooms, or stopes, by the excavation of ore.Stoping is practiced in underground mineral mining when the surrounding rock is strong enough to permit the drilling, blasting, and removal of ore without caving mines where the rock requires no artificial support, the operation is known as open stoping.

What Is Silica Dust & Why Is It So Dangerous | Howden

Common scenarios where people may be exposed to respirable crystalline silica dust include abrasive blasting, mining and excavating, cement, steel and ceramic production, and many many more. Silica Exposure In Mining ; Miners often extract high-silica-content rock …

Coke (fuel)

Coke is a grey, hard, and porous fuel with a high carbon content and few impurities, made by heating coal or oil in the absence of air—a destructive distillation process. It is an important industrial product, used mainly in iron ore smelting, but also as a fuel in stoves and forges when air pollution is a concern.. The unqualified term "coke" usually refers to the product derived from low ...

Coal dust

Coal dust is a fine powdered form of coal, which is created by the crushing, grinding, or pulverizing of coal. Because of the brittle nature of coal, coal dust can be created during mining, transportation, or by mechanically handling coal is a form of fugitive dust.. Grinding coal to dust before combusting it improves the speed and efficiency of burning and makes the coal easier to handle.

Environmental Risks of Mining

As dust, these minerals (such as the asbestos-like mineral riebeckite) can be absorbed into lung tissue, causing problems like pneumoconiosis and silicosis, commonly known as "Black Lung" (Paul & Campbell, 2011). Another example of harmful dust generated is flue dust, a byproduct of mining fluorine.

What are the Effects of Dust on the Lungs? : OSH Answers

The lungs are constantly exposed to danger from the dusts we breathe. Luckily, the lungs have another function - they have defense mechanisms that protects them by removing dust particles from the respiratory system. For example, during a lifetime, a coal miner may inhale 1,000 g of dust into his lungs. When doctors examine the lungs of a miner ...

Hydraulic mining | Britannica

Hydraulic mining, use of a powerful jet of water to dislodge minerals present in unconsolidated material, including mine tailings, placer deposits, alluvium, laterites (soil rich in iron oxides), and saprolites (soil rich in clay). It has also been applied to consolidated materials from sandstones through coal to hard rock. Hydraulic mining encompasses hydraulicking, sluicing, and educing.


Rock Dusting (Definition of Rock dust) Pulverized limestone, dolomite, gypsum, anhydrite, shale, adobe, or other inert material, preferably light colored, 100 percent of which will pass through a sieve having 20 meshes per linear inch and 70 percent or more of which will pass through a sieve having 200 meshes per linear inch; the particles of which when wetted and dried will not cohere to form ...

Mining and Water Pollution — Safe Drinking Water Foundation

 · Mining can deplete surface and groundwater supplies. Groundwater withdrawals may damage or destroy streamside habitat many miles from the actual mine site. In Nevada, the driest state in the United States of America, the Humboldt River is being drained to benefit gold mining operations along the Carlin Trend.

Coal Mining and Production

Surface mining (t/1000t coal produced) Underground mining (t/1000t coal produced) Mining Techniques Contour Area Conventional Longwall Liquid effluents 0.24 1.2 1 1.6 Solid waste 10 10 3 5 Dust 0.1 0.06 0.006 0.01 Source: Based on Edgar, 1983 * (Note: Local conditions will form the basis for choosing the appropriate mining method)

What Life Is Like Working in Underground Coal Mines in the US

 · Coal mining is a tough job — miners work long hours in harsh conditions, but it pays well and some people love it. Here''s what it''s like down below.


Despite these shortcomings, it is in the interests of mining companies, and a requirement of the new reality in the era of EMP, to devise dust control plans. Firstly, a rational dust control plan will allow cost­ effective allocation of resources within the atmospheric pollution budget of the operation.

Coal Dust: What Is It, And Why Is It Dangerous?

 · Coal is an extremely brittle mineral, and both the extraction and refinement processes produce a fine powder known as coal dust. Coal is deliberately pulverized for use as fossil fuel, and this process also produces a substantial output of coal dust. Finally, mining, transportation and even the mechanical handling of coal can create coal dust.

Protecting workers and equipment: Dust ...

 · Dust production in mining and tunnelling operations is an inevitable hurdle, especially when working with heavy equipment. Dust particles in the air can present a number of problems, including potential damage to machinery, dangerous breathing atmosphere, and high flammability.

Chat (mining)

Chat is fragments of siliceous rock, limestone, and dolomite waste rejected in the lead-zinc milling operations that accompanied lead-zinc mining in the first half of the 20th century. Historic lead and zinc mining in the Midwestern United States was centered …


Rock dust, also known as rock powders, rock minerals, rock flour, and mineral fines, consists of finely crushed rock, processed by natural or mechanical means, containing minerals and trace elements widely used in organic farming practices.. The igneous rocks basalt and granite often contain the highest mineral content, whereas limestone, considered inferior in this consideration, is often ...

Mine Dust | Article about Mine Dust by The Free Dictionary

Dust, Mine. mineral particles of a useful mineral and/or gangue that are suspended in a mine atmosphere or that have settled in mining excavations. A principal characteristic of the dust is particle size. On particle size depend the rate of reaction with oxygen, adsorbability and electrical properties of the dust, as well as its biological ...


Proper rock dusting practices have proven to be an effective means of preventing coal dust explosions. Rock dust (generally pulverized limestone dust) serves as a heat sink material that prevents or suppresses a propagating coal dust explosion through the absorption of thermal energy from the heated gases and absorption of radiant energy, which reduces the preheating of unburned coal particles ...

Dangerous Dust | Rock & Gem Magazine

 · Symptoms of CuO dust poisoning mimic the flu, causing headaches, coughing, sweating, sore throat, nausea and fever. Skin, eye, and respiratory tract irritation are also common, along with a distinct "metallic" taste. A common name for these health effects is "metal fume fever".

Dust Suppression Products for Mines & Tunnels | Carroll ...

Dust production in mining and tunnelling operations is an inevitable hurdle, especially when working with heavy equipment. Dust suppression products and systems for mines and tunnels are required to protect mine workers and maintain equipment productivity. Get in touch now.