rock mining Articles
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Assessment of horizontal pillar burst in deep hard rock mines
The paper examines three methods for assessing the stability of horizontal pillars in deep underground hard rock mines. Such pillars could suffer from strain-type rockburst when they become too thin in an environment characterized by high in situ stress and hard, brittle rock. The methods presented are: potential stress failure (PSF), energy release rate (ERR) and the Burst Potential Index (BPI). ...
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Estimating rock properties using sound level during drilling: field investigation
The process of drilling, in general, always produces sound as a by-product. Sound is used as a diagnostic tool for identification of faulty components in the mechanical industry. However, its application in the mining industry for estimating rock properties has not been much explored. Knowledge of rock properties is essential for mine planning and design. An attempt has been made in this paper to ...
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Sjömalmen - Cave Modeling and Prediction of Ground Deformations - Case Study
Project Description The city of Kiruna is partly located on the hanging wall side of the LKAB Kiirunavaara Mine. In the long-term perspective, it is not possible to have any residential buildings or infrastructure within the fracture zone and cave zone resulting from mining. An urban transformation process for the Kiruna city center is thus currently underway. The current prognosis is empirical ...
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Rock Mechanics Support for the Dannemora Mine - Case Study
Project Description The Dannemora mine has been in production since (at least) 1481 until its first closure in 1992. The fact that the mine is very old, but also has been closed for some time, has influenced the infrastructure and mine planning during the earlier era of mining. At the re-start of the mine in 2012, several rock mechanical issues were identified, due to both the complex ore ...
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A fuzzy logic based classification for assessing of rock mass drillability
This paper describes a fuzzy classification system for evaluating of rock mass drillability. Six parameters; Uniaxial Compressive Strength (UCS), joints dipping, Mohs hardness, joints aperture, joints spacing and grain size have been used. In this fuzzy system, each rock mass is classified into five modes from very poor to excellent condition. As a case study, 15 rock masses in two mines in Iran ...
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Triaxial Testing of Brittle Sandstone Using a Multiple Failure State Method
The first phase of a recent research program undertaken to investigate sandstone/methane outbursts in coal bearing rocks required the use of a sandstone reference material in the development and trial of the testing procedures to be used. This was because the number of specimens of outburst-prone rocks from the affected mine was limited. Thus another goal of the first phase was to determine a ...
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Rotem Case Study
Rotem Amfert Negev Ltd (hereafter "Rotem") is an integrated, multinational company which mines and beneficiates phosphate rock and produces a comprehensive range of products based on phosphate rock as raw material, leading to downstream derivatives such as phosphoric acids, fertilizers, specialty chemicals and phosphate salts. ...
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Noise and Vibration Study in Guinea
A principal WKC consultant recently visited the Republic of Guinea as part of a multi-disciplinary team acting on behalf of AngloGold Ashanti, a global leader in gold production. WKC is undertaking a specialist noise and vibration assessment to support a feasibility study to exploit hard rock material and extend the life of the Siguiri mine. The operations of Société Anglogold ...
By WKC Group
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Asbestos Liability: How Does a Company CEO Provide Financial Assurance?
The Environmental Protection Agency (EPA) has been sued by the environmental groups, Sierra Club, Great Basin Resource Watch, Amigos Bravos and Idaho Conservation League, to enforce Section 108(b) of the Comprehensive Environmental Response Compensation and Liability Act (CERCLA), i.e., companies must prove financial assurance requirements for hazardous releases. In short, prove to EPA that they ...
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Determining Bentonite Content in Soil-Bentonite Mixtures Using Electrical Conductivity
A procedure based on electrical conductivity is described for measuring bentonite content in soil-bentonite mixtures having a wide range of bentonite contents. Standard equipment used for sedimentation analysis and an electrical conductivity meter are required. The procedure employs calibration curves relating electrical conductivity and bentonite concentration for soil-bentonite-water slurries. ...
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Sandvik: Mechanized mining makes sense for Africa`s platinum industry - Case Study
According to equipment supplier Sandvik Mining, mechanized mining's exponential growth dispels the myth that new techniques are not proving profitable on the African continent. In the last decade, according to the company, production volumes of southern African platinum mines rose from 2 million metric tons (mt) in 2000 to 35 million mt just 10 years later, Based on current mine development ...
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Introduction to Mining Wastewater Treatment: The Overall Guide
Mining waste comprises different types of rock, overburden, slurry and tailings from the processes of excavation and dressing. Further physical and chemical processing of a wide range of materials create additional waste from mining operations. Therefore, mine wastewater treatment is required, in order to avoid the contamination of the surrounding environment.This guide aims to explain ...
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Dust from Mine Tailings Causes These 3 Problems
Dust from mine tailings is a significant concern for communities surrounding inactive and active mines. The problems caused by dust affect people and the environment in a number of ways, which is why it is important to control the dust from mine tailings quickly and effectively. What Are Mine Tailings? Mining operations mine for minerals of interest, such as lead, zinc, copper, silver, and ...
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Recycled fertilizer from Struvite and Ashes - Case Study
Fertilizers based on sewage sludge ash, bone meal ash and struvite The goal of ICL Fertilizers is to replace the use of limited phosphate rock from mines with phosphate from ashes of sewage sludge, meat and bone meal, wood and struvite. In 2025, 25,000 tonnes per year of phosphate from phosphate rock must be replaced by phosphate from secondary raw materials. With the self-developed technology ...
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Acoustic fingerprinting for rock identification during drilling
During the process of mining, it is imperative to know the type and properties of the rocks being handled. The current technology for this involves core drilling, and subsequently subjecting the drilled cores to various tests in the laboratory, to identify the rocks and establish their properties. In many cases, obtaining a sample may be cumbersome and/or non–profitable. This paper presents a ...
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Looking to ramp up your abrasion resistant steel results?
Most of our long term customers have documented many of their abrasion resistant steel breakthroughs as a result of working with our dedicated team of JADCO sales representatives. AR400 vs AR500? Many people wonder which delivers longer life. Installing the same wear resistant steel you have always used will continue to deliver the same old results currently making you frustrated. Do you ...
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Hydroman™ submersible cutter suction dredger pump
submersible cutter suction dredger pumps are extra heavy duty submersible slurry pumps. TJQ has been designed for pumping slurry, sand, sludge, mud, sea water, gravel and rock notably in mining and dredging industry. It is a pump and an excavator at the same time. The design incorporates the renowned patented Hydroman agitator, attached directly on the pump shaft, closed impeller, large open ...
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The limits to growth and 'finite' mineral resources: re–visiting the assumptions and drinking from that half–capacity glass
The famous 1972 study 'Limits to growth' (LtG) created global controversy about its dire predictions for the 21st century - e.g., global population crash, rampant pollution and resource depletion. Amongst some of the most fervent critics was the mining industry, who argued that mineral-metals are easily recyclable, that exploration and new technology can increase known resources, and that price ...
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Neutral mine drainage water-quality impacts from a form taconite mine
Abstract: Surface waters at the site of a former Minnesota taconite mine were reported to have solute concentrations elevated with respect to water-quality standards. Waste rock and ore generated from past mining were primarily from open pit mining of the Biwabik Iron Formation (BIF). The BIF is a variably bedded iron formation composed of inter-bedded cherty and slaty iron silicate and iron ...
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Bacanora relies on Veolia to advance Mexico lithium project
Veolia Water Technologies engineered and designed the production process that recovers lithium carbonate and sulfate of potash from clay deposits using HPD® evaporation and crystallization systems. Lithium, a key component for fast-growing rechargeable battery markets, powers everything from consumer electronics to electric cars and energy storage systems. Although lithium is a ...
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