نتایج جستجو برای: underground mining

تعداد نتایج: 99723  

Journal: :CoRR 2017
Markus Borg Thomas Olsson John Svensson

With ever-increasing productivity targets in mining operations, there is a growing interest in mining automation. The PIMM project addresses the fundamental challenge of network communication by constructing a pilot 5G network in the underground mine Kankberg. In this report, we discuss how such a 5G network could constitute the essential infrastructure to organize existing systems in Kankberg ...

2002
E. TOPAL M. KUCHTA A. NEWMAN

LKAB’s Kiruna Mine is located above the Arctic Circle in northern Sweden, and produces about 24 million tons of iron ore per year, making it is the second largest underground mine in the world today. The orebody, a world-class high-grade magnetite deposit, is approximately 4 km long and 80 m wide on average, and lies roughly in the north-south direction, with a dip of some 60 degrees. Surface m...

2017
Shun Liang Derek Elsworth Xuehai Fu Xuehua Li

Hydrocarbon wells drilled vertically through longwall coal pillars are vulnerable to severe deformation and potential failure as a result of underground coal mining. The lithology of the host rocks play a critical role in well stability. In this study, a two dimensional finite element method is employed to investigate the horizontal shear offset, vertical delamination, and compression at the we...

2006
YOSHINORI WATANABE KEN-ICHI ITAKURA KAZUHIKO SATO YOSHIAKI FUJII HUA GUO XUN LUO

For underground mining and construction, it is important to obtain a discontinuities’ model of rocks for simulations to evaluate rock stability around the working space and fluid flow in these rocks. We have developed a method using the fractal property of acoustic emission (AE) source distribution to construct a feasible crack distribution model. We confirmed the usefulness of the model throug...

2015
Hyongdoo Jang Erkan Topal

Underground mining becomes more efficient due to the technological advancements of drilling and blasting methods and the developing of highly productive mining methods that facilitate easier access to ore. In the perspective of maximizing productivity in underground mining by drilling and blasting methods, overbreak control is an essential component. The causing factors of overbreak can simply ...

2000
Diana LaBelle John Bares Illah Nourbakhsh

Underground coal mining is one of the most dangerous occupations. Years of effort have been dedicated to researching methods of characterizing mine roof and floor for improving the mining environment. This research investigates using a neural network to classify rock strata based on the physical parameters of a roof bolting drill. This paper presents our methodology, as well as early results ba...

Journal: :Mining 2021

It is important that the strategic mine plan makes optimum use of available resources and provides continuous quality ore to drive sustainable mining profitability. This requires development a well-integrated strategy options for surface and/or underground their interactions. Understanding current tools methodologies used in industry transitions planning are essential dealing with complex deep-...

Journal: :Resources Policy 2023

Underground mining has historically occurred in surface and near-surface (shallow) mineral deposits. While no universal definition of deep underground exists, humanity's need for non-renewable natural resources inevitably pushed the boundaries possibility terms environmental technological constraints. Recently, is being extensively developed due to depletion shallow One main advantages its lowe...

2017

Coal is an important fossil fuel and will also be for the next decades [1]. The only way to achieve the challenges faced by the coal industry is to reduce production costs by improving productivity. Improvement of productivity has become an important goal for today’s coal industry in the race to increase price competitiveness. In recent years, underground mining method is becoming popular becau...

2014

Mining and logging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 854 876 881 882 883 890 7 Logging.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1133 49.9 52.9 53.2 55.2 54.4 54.1 -0.3 Mining. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 803.7 ...

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