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Historically, the rehabilitation effort of opencut coal mines in Central Queensland has been relatively ad hoc and conducted as an activity based on regrading accessible mine spoil disturbed by open cut mine operations. The focus of mine planning has essentially been on scheduling excavation and short hauling
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Coal mining is the process of extracting coal from the ground. Coal is valued for its energy content and since the 1880s, has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production. In the United Kingdom and South Africa, a coal mine and its structures are a colliery, a coal mine is a ''pit'', and
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The Surface Pen and Surface Slim Pen are mighty tools that let you get more done on your Surface PC. To maximize the Surface Pen''s ability, there are some essential apps you should check out.
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study is presented for a proposed southern African coal mine. OPENCAST COAL MINING SURFACE EROSION PROBLEMS Soil erosion and sediment transport depend on the following factors: (a) climatic conditions, (b) soil and spoil erositivity, (c) overland slope and slope length, (d) ground cover, (e) soil conservation control practices, (f) catchment drainage characteristics. Opencast mining
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Figure 1 A near miss over a drop off at a coal mine in the Hunter Valley . SAFETY BULLETIN 2 . Figure 2 Dozer rolled while reversing at a metalliferous mine . Figure 3 A dozer reversed over a light vehicle at a surface coal mine . Recommendations It is recommended mine operators ensure that: 1. planning minimises a requirement for dozers to work on cross grades 2.
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This methodology was then applied in the design of a mechanized bordandpillar mining layout for a given piece of ground (Vlakpoort and Moddergat) using a given selection of machines. This piece of ground contains the PGM bearing UG2 Reef with an average thickness of 124 cm and dipping at 18° with adverse strike and dip changes. Two bordandpillar layouts were designed
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ABSTRACT This paper describes the ongoing development of an advanced computer system for the assessment of geotechnical risk in surface coal mines. In particular it is concerned with detailing the practical problems and solutions involved in linking computerised geological models, specialist mining software packages arid expert systems when applied to slope stability
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MDG 28 : Safety requirements for coal stockpiles and reclaim tunnels . Definitions . Bridging A condition in which the hole above a draw down point for an operating feeder does not manifest at the surface of the coal stockpile. It is also known as doming, voiding and cohesive arches. Coal placement structures
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during the mine design process. The rock slope design role often incorporates some degree of risk management, either explicitly or implicitly in the design of pit slopes. Nevertheless, unexpected failures have occurred in the past and continue to do so today. These slope failures motivated the development of the slope stability radar (SSR). The SSR system can detect and alert movements of a
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resulting slope design. Let''s clarify this interaction. Assume an open pit mine with a substantial overall slope height. Now, assume a bench height of 15m, a required catch bench width of 8m with a stability determined face angle of 70°. Assume the interramp slope has been
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Keywords: Rock excavation, Safety analysis, Slope stability, Surface mining Introduction The geotechnical study and slope design was conducted of an open pit copper mine (500 m long, 200 m wide) situated in Rajasthan, India. The ore body is 40 m wide and 313 m long. The ultimate pit depth is 148 m. The ore body is striking NNWSSE with an average dip of 65° due west. It swelled centrally
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This methodology was then applied in the design of a mechanized bordandpillar mining layout for a given piece of ground (Vlakpoort and Moddergat) using a given selection of machines. This piece of ground contains the PGM bearing UG2 Reef with an average thickness of 124 cm and dipping at 18° with adverse strike and dip changes. Two bordandpillar layouts were designed for this area. Layout
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Drilling in mining 1. Introduction to Drilling Technology for Surface Mining Prof. K. Pathak Dept. of Mining Engineering, IIT, Kharagpur721302 1 Introduction Drilling is the process of making a hole into a hard surface where the length of the hole is very large compared to the diameter.
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The surface mining of rocks and coal requires drilling and blasting operation for loosening the strata. In drilling and blasting a lot of dust, gases, ground vibrations, cracks and noise are produced. This concludes that these operations are not eco friendly. Also they involve many types of machinery to complete the job. Blast free mining is the need of the hour to conserve the environment
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Pit and Surface Mining, Aug. 2001. A geotechnical rationale for the design of South African open cast coal mine highwalls Open (conventional) wall open cast highwalls Open cast mines using buffer blasted highwalls. Open (conventional) highwalls—classic soil and rock slope failure of the overburden and interburden. Open cast mines using buffer blasted highwalls— highwall subsidence due
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Open Pit Slope Design and Performance The assessment and management of risk in the mining industry is becoming an integral component of project development from the conceptual design level, through detailed design for construction, to sustaining operations. Consequences of an open pit slope failure can have significant safety and/or economic impacts, and hence the slope designs can form a
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Stability Analysis and Design of OpenPit Mine Slope in China: A review . Zhiqiang Yang 1, 2, Qian Gao 1, Maohui Li 1, Guangcun Zhang 1 1. Key Laboratory of High Efficient Mining and Safety of Metal Mine Ministry of Education, University of Science and Technology Beijing, 100083,Beijing China . 2. Jinchuan Group Co. Ltd., Jinchuang 737100, Gansu Province China
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Pit design parameters and planning data• Density of seams, total coal column thickness•Thickness of partings• Gradient• Geological disturbances• Strike lengths, shape of property• Geological Reserves• Surface constraints/adjacent habitat• Dump yards availability with lead and lift• Mining system, optimum mining concept• Depth of operation, mineable reserves
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base spoil material are affected by slaking in order to design safe spoil pile slope and height, and a safe dewatering rate. In this study, fresh spoil material collected from a coal mine in the Bowen Basin in Queensland, Australia was subjected to high overburden pressure (0 – 900kPa) under saturated conditions and maintained over a period of time (0 – 6 months) allowing the material to
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Figure 2 shows a comparison of the annual produ ction rates and producti vities of US coal mines. Surface mines have very few limitations on the operation of large machines with high capacity, whereas underground operations are considerably restricted by narrow working spaces and rock conditions. Moreover, less commuting time is required at a surface mine, whereas a
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· PDF (3844 K) PDFPlus (1056 K) Citing articles Geological survey and stability evaluation of slope of open pit mine of Muara Enim coalfired power project. Project Group of Chengdu University of Technology, Guohua Indonesia. Google Scholar Richards BG, Coulthard MA, Toh CT. 1981. Analysis of slope stability at Goonyella Mine. Canadian Geotechnical Journal 18: 179194 Link, ISI,
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Opencast mining on hill slopes, particularly in areas of heavy rainfall, is vulnerable to landslides causing loss of human life, property and deforestation. This can be controlled by geotechnically designed slope of the mine and adequate support system. (E) Unaesthetic landscape. Mining activity changes the landuse pattern and alters the surface topography by increased surface erosion and
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surface mines, coal and nonmetal, increased to an alarming rate of seven during 1999. To determine the causes of slope failure and successful mining practices, the National Institute for Occupational Health and Safety undertook a study. The study included: 1. A review of accident statistics; 2. A review of Federal and state mining laws pertaining to surface mining; 3. A
WhatsApp Keywords: Rock excavation, Safety analysis, Slope stability, Surface mining Introduction The geotechnical study and slope design was conducted of an open pit copper mine (500 m long, 200 m wide) situated in Rajasthan, India. The ore body is 40 m wide and 313 m long. The ultimate pit depth is 148 m. The ore body is striking NNWSSE with an average dip of 65° due west. It
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