Slope stability calculation method for highwall mining with open-cut mines
2022年1月7日 This study proposes a calculation method of time and space stability of a slope with mining chambers that accounts for both time and space effects. The influence of high mining on slope stability ...
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Web pillar stability in open-pit highwall mining
2022年3月10日 The highwall miner is a new open-pit highwall mining technology that combines the advantages of open-pit mining and underground mining to achieve highwall
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Reasonable coal pillar design and remote control
2019年4月3日 Highwall mining (HWM) technology is an efficient method for exploiting residual coal resources in Chinese open-pit coal mines.
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Reasonable coal pillar design and remote control mining
2019年4月3日 Highwall mining (HWM) technology is an efficient method for exploiting residual coal resources in Chinese open-pit coal mines. However, on-site personnel and equipment can be damaged by the instability of the highwall mining residual coal pillars and subsidence of final end-walls.
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Stability Analysis of Multi-Layer Highwall Mining: A
2023年2月15日 The multi-layer highwall mining model presented in this study has demonstrated that it can effectively reduce the vertical stress on the web pillar and
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Application of highwall mining system in weak
2016年4月29日 This paper describes the characteristics of the highwall mining system and discusses the appropriate highwall mining system in Indonesia including the application of the backfilling system to improve
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Highwall mining of thick, steeply dipping coal–a case study
2019年9月1日 Highwall mining has the potential to reduce highwall stability by weakening and raising the stress levels in the mined coal seam, usually at the base of the highwall.
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Reasonable coal pillar design and remote control mining
2019年4月3日 Abstract. Highwall mining (HWM) technology is an efficient method for exploiting residual coal resources in Chinese open-pit coal mines. However, on-site
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MINERAL MINING TECHNOLOGY Effect of Highwall
2017年8月25日 Based on the analysis of the effect exerted by highwall angle on the current stripping ratio, suggestions are made on possible improvement in the open pit
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Feasibility study of highwall mining in north surface mine of ...
Yima Coal Corporation is considering to adopt highwall mining method with auger machine to recover coal from north surface pit that has reached final highwall position. The major geomechanical issues associated with auger mining are highwall and pillar stability.
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Stability Analysis of Multi-Layer Highwall Mining: A
2023年2月15日 Open-pit mining is a common method for extracting coal, but considerable resources are often left unrecovered at the bottom of end-slopes, leading to a permanent waste of resources. This research presents a sustainable approach of multi-layer highwall mining at different levels to address the issue of abundant resources left unrecovered at
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Slope stability calculation method for highwall mining with open-cut mines
2022年1月7日 Samples were collected from an open-cut coal mine in Inner Mongolia with a total length of 5.1 km. The major coal seams are nos. 19 and 21 with a current mining rate of 360 m/a.
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Ground Control Design For Highwall Mining - Centers
2012年8月29日 Highwall Mining Layouts When designing a highwall mining layout, the mining engineer must specify 1) web pillar width, 2) number of web pillars between barrier pillars and 3) barrier pillar width. The design parameters are determined by the highwall miner hole width, the mining height and the overburden depth. In addition, the mine
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Highwall mining of thick, steeply dipping coal–a case study
2019年9月1日 Highwall mining at the Kemmerer Mine is ongoing. To date, mining has been successful, but not without challenges. The system has proven capable of operating at inclinations greater than the design limit of 20°; in some areas, it has successfully mined at an angle greater than 25°. ADDCAR also successfully verified that alignment could be ...
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highwall mining - 英中 – Linguee词典
sacred places or areas of cultural significance owing to competing interests on those same lands; removals of indigenous peoples from their traditional lands and territories; and the development of national laws and policies that might result in negative impacts on the lives of indigenous peoples. daccess-ods.un.
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MINERAL MINING TECHNOLOGY Effect of Highwall
2017年8月25日 The highwall incline in parallel to ef during later period of the open cutting with rehandling results in the same pattern of open pit mining until the entire highwall is changed onto the cutting with rehandling (period XIV), and then another stage is up—depletion of the highwall at the slope stability angle ψ. Fig. 2.
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University of Wollongong Research Online
2020年10月13日 first test mining was in 1959 in a short lerm open-cut mine in the B seam near Kianga. Open-cut mining started in May 1961 and underground in November 1963. The mine has had a number ofopen cut pits. underground mines and highwull mining since operations commenced. Presently, active mining is conducted by open cut and highwall
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Highwall Mining Stability - Atlantis Press
using this method to mine millions of tonnes of coal, a number of major roof/panel failures have been experienced. This paper provides an overview of the highwall mining technology. A detailed case study on a panel failure is also presented. Keywords: Highwall mining, panel stability, pillar, span. 1. Introduction Highwall mining is a remotely ...
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What is a highwall in mining? - Studybuff
2020年2月4日 Highwall mining is a remotely controlled mining method which extracts coal from the base of an exposed highwall. The method has the advantage of low capital cost and less lead time compared with a full underground mine, while being capable of producing in excess of 1 million tonnes per system per year.
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Reasonable coal pillar design and remote control mining
2019年4月3日 The use of the local mine stiffness concept can provide added confidence in a highwall mining panel layout design . Web and barrier pillar recommendations for close-proximity multiple-seam highwall mining were studied by Mark [22,23]. Perry et al. studied the effect of the highwall mining progression on the web and barrier pillar stability.
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Web pillar stability in open-pit highwall mining
2022年3月10日 The LDC100 highwall miner (Han et al. 2014) is used to extract the coal left under the west highwall of the open-pit mine.This is an unmanned mining machine with a production capacity of 60 t/h and a suited coal-rock hardness factor of f ≤ 2, which is applicable for recovery from lignite open-pit mines.The recovery chamber has a
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Stability analysis of rib pillars in highwall mining under
2022年8月12日 The retained coal in the end slope of an open-pit mine can be mined by the highwall mining techniques. However, the instability mechanism of the reserved rib pillar under dynamic loads of mining haul trucks and static loads of the overlying strata is not clear, which restricts the safe and ecient application of highwall mining.
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University of Wollongong Research Online
2020年10月13日 permit Highwall mining at man Coal Mine Open Cut. The approvals process was tackled on a number of fronts. The geotechnical report, supplied by the Minserv Group was available in March 1996. A second report investigating the effects of groundwater on Highwall mining at Ulan was completed by July of 1996.
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INERTISATION OF HIGHWALL MINING TO CONTROL
2009年10月28日 The Moura Mine in Central Queensland was the first coal mine in Australia to introduce the highwall mining method. This method was developed so that additional coal could be extracted via surface mining operations after reaching the economic limit of opencut operations. The two main highwall mining systems currently used in
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Application of highwall mining system in weak
2023年8月8日 Keywords Open cut mine Left out coal Highwall mining systems Weak geological condition 1 Introduction ... highwall mining (CHM) system and is categorized into two types: one is an Addcar system ...
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Stability analysis of rib pillars in highwall mining under
2022年5月27日 At present, the coal seam exploited in large open-pit mines in China is mostly near-horizontal coal seam, and the internal dumping technology in the mining area is widely adopted (Chen and Wu 2016; Wang et al. 2019; Wu et al. 2020; Zhao et al. 2020; Lelek and Kulczycka 2021).In the traditional open-pit mining design, the transportation
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International Journal of Mining Science and Technology
Highwall mining is a mining method that produces coal from the base of highwall in surface mines as illustrated in Fig. 1 [1]. A series of parallel entries are driven into the coal seam using
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Highwall Regulations Mining Safety Topics - American Mine
Highwall Safety. Highwall stability is essential for open-cut mining. In these particular projects, otherwise known as open-pit mining, employs a technique in which rock and minerals are extracted from a borrow pit, or sandbox. For long-term highwall performance, the substance properties that makeup mining sites—or more specifically, the ...
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Highwall Mining Australia LinkedIn
Highwall Mining Australia 937 followers on LinkedIn. Specialist mining contractors in non-conventional open-cut methods to recover resources from the hard to reach areas. Mining services provider focusing on coal mining at Open-cut mines with the Addcar Highwall Mining system. Providing full service solutions from feasibility studies, pit preparation,
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