Lean Manufacturing: A Deep Dive into Muda, Muri, Mura. Muda, Muri, and Mura are three types of waste in lean manufacturing. Muda is non-value-added activities, Muri is overburden, and Mura is unevenness. Identifying and eliminating them using lean tools like value stream mapping and Kaizen leads to increased efficiency and productivity.
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· The nature of coal waste embankments is different from the common soil or rock embankments due to their Rao AM, Adhikary D, Balusu R (2014) Mine overburden dump failure: a case study. Geotech Geol Eng 32(2):297–309 Google Scholar Wardha Valley
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· While surface movement regularities have been sufficiently understood in the mining practices of eastern China, the case seems to be very different in western China where the super-thick and
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: Nazrul Islam, Shahadev Rabha, K.S.V. Subramanyam, Binoy K. Saikia, Binoy K. Saikia · The present paper mainly deals with a case study of failed dump slope in western coalfield limited, Nagpur, India. A huge mass of debris flow had happened during the routine the activity of
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· Present investigation deals with stability analysis of overburden dump slope at Marki Mangli-I open cast coal mine. The stripping ratio of the Marki Mangli-I coal mine is 6.75 which is very large. Existing overburden dump of the mine consists of three benches of overall height of 30 m and bench width of 20 m. Geomechanical properties
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We will explore the “7 wastes”, often referred to as Muda, and update our understanding of the other two, lesser know wastes Mura – the waste of unevenness, and Muri – the waste of overburden. These two wastes are often overlooked as we journey along the Lean path. As you look into Lean, you come across the 7 wastes (or the 8 wastes).
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· Present investigation deals with stability analysis of overburden dump slope at Marki Mangli-I open cast coal mine. The stripping ratio of the Marki Mangli-I coal mine is 6.75 which is very large
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The waste OB materials comprise low-grade and barren materials that have to be first excavated in order to access the R., Chakravarty, D. Characterisation of overburden dump materials: a case study from the Wardha valley coal field. Bull Eng 75
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· The evolution of fractures in overburden is quantitatively investigated to characterize the effect of mining activity. Scale model testing and numerical modeling were used based on the engineering geological and mining environments of Panel 11050 in the Quandian Coalmine in Henan Province, China. The maximum vertical displacement is
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· Coal production is accompanied by the generation of a massive quantity of coal overburden (OB), which is stacked on the adjacent ground in the form of external dumps. The major problems associated with the coal OB dumps are groundwater and nearby soil contamination due to heavy metals, land degradation, and biodiversity loss.
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ATCO Concrete. Aruba. Tonnage 110tph. Material C&D Waste, Crushed Concrete. Output 1 Sand (-5mm) | 2 Aggregates (5-10mm, 10-20mm) End Use. Concrete Production. Located on the holiday island of Aruba, ATCO Concrete Products operate a turnkey waste recycling plant to process C&D waste for use in concrete production. VIEW CASE STUDY.
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· Firstly, taking Jharia coal-field as a case study, the parameters/criteria affecting the environment have been identified. The parameters that are the most affected due to mining are air, water
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· The aim of this study was to measure the in situ soil CO2 flux from grassland, afforested land and reclaimed coalmine overburden dumps by using the automated soil CO2 flux system (LICOR-8100
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· The economic development of a country is mainly dependent on important industrial activities such as mining. Because of mining operations, huge quantities of solid wastes especially, overburden and rejects, are generated. As these are not valuable to the owners of the mine, they may be inappropriately disposed of into the environment,
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· A lot of grout ground leakage occurred during Muduchaideng coal mine separation layer grout work, resulting in serious pollution. To find the mechanism of grout leakage, this paper carried out indoor experiments and on-site measurements. Through the indoor scale model test, the deformation of overburden stratum was captured, which
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· Earth 2024, 5 4 Figure 1. Research territory (A) and scheme of overburden placement options being explored (above is Case and Control X, below is Control W) (B). The waste rock in Control W was located along the valleys of the ravine-gullies net-work. The slopes
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· Mining of Coal is one of the chief sources of power generation globally to meet the energy demand. However, the mining operations and power production leads to the generation of overburdens and fly ash in huge quantities. These became severe threat to the environment during backfilling via leaching of contaminants and forming acid mine
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· In recent times, coal mine overburden (OB) is an unprocessed, highly heterogenous waste of coal mining industries. However, it has proved to be a sound potential alterative of natural
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· Removal of overburden to access the ore can pose major problems in storage and reclamation. The stripping ratio (waste-to-ore) for surface mining of metal ores generally ranges from 2:1 to 5:1, depending on local conditions. The iron ore is predominantly mined by opencast mining throughout the country.
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· Mishra et al. (2023b) carried out the valorization of overburden waste rock as coarse and fine aggregate. Carbon peak prediction and emission reduction pathways of China’s low-carbon pilot cities: A case study
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· Backfilling with mine overburden or waste rock material may provide an alternative for river sand. Utilisation of these nearby mine overburden dumps as backfilling material in underground mine
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· With continuous increasing of mining activities, some problems, such as environmental issues, occupy a lot of space, and the risks caused by the instability of mine waste depots are far occurred than ever. One possible way to reduce mentioned problems is to stabilize and reuse mine wastes as road construction materials. On the other hand,
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· Journal of The Institution of Engineers (India): Series D-The depths of open-pit mines have been increasing in the last few decades. This transformation generates a vast amount of waste rock Table 1 compiles the consequences of instability in waste dump slopes, while Table 2 depicts the scale of displaced material because of the dump
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The severe overburden failure induced by high-intensity mining is the essence of eco-environmental problems in Northwest China, and the degree of overburden failure is closely related to the location and failure of key strata (KS), which controls part of the strata in the overburden. In order to solve the problems of traditional KS based on mechanical
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· The Cenozoic-age Makum coal from northeastern India offers numerous research opportunities because of its diverse geochemical and geological characteristics. Due to its high sulfur content, the coal has been found to be less useful for industrial purposes. It can, however, serve as a hub for ongoing research on coal-based derivative
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· The increased utilization of mines raises overburden wastes over time. Overburden wastes can be exploited as construction and pavement materials in order to reduce waste depots. The present study explores the geotechnical properties of two overburden wastes of Golgohar mine, Iran. After stabilization with Portland cement at
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· Coal mine waste rock is generated during coal extraction and is usually disposed of in non-engineered dumps. The dumps are extended vertically to 100–120 m height to reduce the spatial footprint. The waste mass generally consists of loose, cohesionless material associated with high heterogeneity, so the dumps are prone to
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For this reason, the 3Ms (muri (overburden), muda (waste), and mura (unevenness)) occur easily because personnel cannot be distributed according to a clear production plan like in manufacturing. To eliminate the 3Ms in logistics, the dependency on personnel needs to be reduced to a level greater than the optimal personnel distribution.
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· This paper presents an investigation on the effect of grouting into multi-bed-separation to control mining-induced surface subsidence. In the overburden without obvious thick-and-hard strata for generating large-scale bed separation, overburden grouting is carried out by increasing the number of boreholes and grouting strata. The
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· It is worth noting that the waste rocks (overburden) generated during coal mining, upon exposure to oxygen, release Se, among other (Chakraborty and Mukherjee 2010). In a case study, human
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