The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
Frank C. Harris - One of the best experts on this subject based on the ideXlab platform.
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Predicting downtime costs of tracked hydraulic excavators operating in the UK Opencast Mining industry
Construction Management and Economics, 2002Co-Authors: David J. Edwards, Gary David Holt, Frank C. HarrisAbstract:This paper describes the development of a model to predict the hourly cost of downtime (using regression equations) for tracked hydraulic excavators operating in the UK Opencast Mining industry. A three-stage process was utilized for the model's development. The first stage predicted machine cycle times, the second predicted hire costs per hour and the third used the outputs of the first two to forecast the cost of breakdown. Both cycle time and hire cost models were revealed to be good predictors, as exhibited by the ‘high’ R2 values of 0.86 and 0.95, respectively. A plant expert employed within the Defence Logistics Organisation, UK Ministry of Defence, validated these regression models and the process by which downtime costs were predicted. Future research work will aim to enhance the predictive ability of the models developed, expand the research to cover other machine types, and reproduce the findings in graphical and tabular format to improve the interpretation of information generated.
Zhongke Bai - One of the best experts on this subject based on the ideXlab platform.
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Dynamic Changes in Carbon Sequestration from Opencast Mining Activities and Land Reclamation in China’s Loess Plateau
Sustainability, 2019Co-Authors: Boyu Yang, Zhongke Bai, Yingui Cao, Feng Xie, Junjie Zhang, Yannan WangAbstract:Opencast coal Mining causes serious damage to the natural landscape, resulting in the depletion of the carbon sequestration capacity in the Mining activity. There are few studies on the variation of carbon sequestration capabilities caused by land use changes in Opencast Mining areas. This paper uses six images were used to quantify the changes in land use types from 1986 to 2015 in the Pingshuo Mining area in northwest China. At the same time, used statistical analysis and mathematical models to study soil and vegetation carbon sequestration. Results indicate that the total carbon sequestration exhibits a significant downward trend from 4.58 × 106 Mg in 1986 to 3.78 × 106 Mg in 2015, with the decrease of soil carbon sequestration accounting for the largest proportion. The carbon sequestration of arable land accounted for 51% of the total carbon sequestration in the Mining area, followed by grassland (31%) and forestland (18%). Land reclamation contributed to the greatest increase in carbon sequestration of arable land from 17,890.15 Mg (1986) to 27,837.95 Mg (2015). Additionally, the downward trend in the carbon sequestration capacity of the Mining ecosystem was mitigated after 2010 as the positive effects of land reclamation gradually amplified over time and as the Mining techniques were greatly optimized in recent years in the Pingshuo Mining area. Thus, terrestrial carbon sequestration can be improved through land reclamation projects and optimized Mining activities. These results can help guide the utilization of reclaimed land in the future.
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dynamic changes in carbon sequestration from Opencast Mining activities and land reclamation in china s loess plateau
Sustainability, 2019Co-Authors: Boyu Yang, Zhongke Bai, Yingui Cao, Feng Xie, Junjie Zhang, Yannan WangAbstract:Opencast coal Mining causes serious damage to the natural landscape, resulting in the depletion of the carbon sequestration capacity in the Mining activity. There are few studies on the variation of carbon sequestration capabilities caused by land use changes in Opencast Mining areas. This paper uses six images were used to quantify the changes in land use types from 1986 to 2015 in the Pingshuo Mining area in northwest China. At the same time, used statistical analysis and mathematical models to study soil and vegetation carbon sequestration. Results indicate that the total carbon sequestration exhibits a significant downward trend from 4.58 × 106 Mg in 1986 to 3.78 × 106 Mg in 2015, with the decrease of soil carbon sequestration accounting for the largest proportion. The carbon sequestration of arable land accounted for 51% of the total carbon sequestration in the Mining area, followed by grassland (31%) and forestland (18%). Land reclamation contributed to the greatest increase in carbon sequestration of arable land from 17,890.15 Mg (1986) to 27,837.95 Mg (2015). Additionally, the downward trend in the carbon sequestration capacity of the Mining ecosystem was mitigated after 2010 as the positive effects of land reclamation gradually amplified over time and as the Mining techniques were greatly optimized in recent years in the Pingshuo Mining area. Thus, terrestrial carbon sequestration can be improved through land reclamation projects and optimized Mining activities. These results can help guide the utilization of reclaimed land in the future.
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Dynamic Changes in Carbon Sequestration from Opencast Mining Activities and Land Reclamation in China’s Loess Plateau
MDPI AG, 2019Co-Authors: Boyu Yang, Zhongke Bai, Yingui Cao, Feng Xie, Junjie Zhang, Yannan WangAbstract:Opencast coal Mining causes serious damage to the natural landscape, resulting in the depletion of the carbon sequestration capacity in the Mining activity. There are few studies on the variation of carbon sequestration capabilities caused by land use changes in Opencast Mining areas. This paper uses six images were used to quantify the changes in land use types from 1986 to 2015 in the Pingshuo Mining area in northwest China. At the same time, used statistical analysis and mathematical models to study soil and vegetation carbon sequestration. Results indicate that the total carbon sequestration exhibits a significant downward trend from 4.58 × 106 Mg in 1986 to 3.78 × 106 Mg in 2015, with the decrease of soil carbon sequestration accounting for the largest proportion. The carbon sequestration of arable land accounted for 51% of the total carbon sequestration in the Mining area, followed by grassland (31%) and forestland (18%). Land reclamation contributed to the greatest increase in carbon sequestration of arable land from 17,890.15 Mg (1986) to 27,837.95 Mg (2015). Additionally, the downward trend in the carbon sequestration capacity of the Mining ecosystem was mitigated after 2010 as the positive effects of land reclamation gradually amplified over time and as the Mining techniques were greatly optimized in recent years in the Pingshuo Mining area. Thus, terrestrial carbon sequestration can be improved through land reclamation projects and optimized Mining activities. These results can help guide the utilization of reclaimed land in the future
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Variations in pore distribution of reconstructed soils induced by Opencast Mining and land rehabilitation based on computed tomography images
Archives of Agronomy and Soil Science, 2017Co-Authors: Jinman Wang, Lingli Guo, Zhongke BaiAbstract:ABSTRACTOpencast coal Mining is an anthropogenic activity that changes the antecedent soil profile, and it was important to understand the distribution characteristics of soil pore and then select suitable land rehabilitation measures. To better quantify the pore distribution characterization of reconstructed soils in Opencast coalmine dumps, high-resolution and non-destructive computed tomography (CT) method was used to study the effect of Opencast coal-Mining and land rehabilitation on the soil pore distribution by scanning soils from the Antaibao Opencast Coal-mine in China. The soils were taken from the dump platforms with different rehabilitation time and an unmined site. ImangeJ 2 was used to process the scanned images and the soil pore densities and porosities of different pore sizes were used to analyze the distribution characteristics of soil pore. Opencast Mining activities decreased soil pore density and soil porosity, especially in macropores. Compared to unmined soils, the total porosity of t...
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Improving Soil Enzyme Activities and Related Quality Properties of Reclaimed Soil by Applying Weathered Coal in Opencast-Mining Areas of the Chinese Loess Plateau
CLEAN - Soil Air Water, 2011Co-Authors: Hongbo Shao, Zhongke BaiAbstract:There are many problems for the reclaimed soil in Opencast-Mining areas of the Loess Plateau of China such as poor soil structure and extreme poverty in soil nutrients and so on. For the sake of finding a better way to improve soil quality, the current study was to apply the weathered coal for repairing soil media and investigate the physicochemical properties of the reclaimed soil and the changes in enzyme activities after planting Robinia pseucdoacacia. The results showed that the application of the weathered coal significantly improved the quality of soil aggregates, increased the content of water stable aggregates, and the organic matter, humus, and the cation exchange capacity of topsoil were significantly improved, but it did not have a significant effect on soil pH. Planting R. pseucdoacacia significantly enhanced the activities of soil catalase, urease, and invertase, but the application of the weathered coal inhibited the activity of catalase. Although the application of appropriate weathered coal was able to significantly increase urease activity, the activities of catalase, urease, or invertase had a close link with the soil profile levels and time. This study suggests that applying weathered coals could improve the physicochemical properties and soil enzyme activities of the reclaimed soil in Opencast-Mining areas of the Loess Plateau of China and the optimum applied amount of the weathered coal for reclaimed soil remediation is about 27?000?kg?hm-2.
Yannan Wang - One of the best experts on this subject based on the ideXlab platform.
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Dynamic Changes in Carbon Sequestration from Opencast Mining Activities and Land Reclamation in China’s Loess Plateau
Sustainability, 2019Co-Authors: Boyu Yang, Zhongke Bai, Yingui Cao, Feng Xie, Junjie Zhang, Yannan WangAbstract:Opencast coal Mining causes serious damage to the natural landscape, resulting in the depletion of the carbon sequestration capacity in the Mining activity. There are few studies on the variation of carbon sequestration capabilities caused by land use changes in Opencast Mining areas. This paper uses six images were used to quantify the changes in land use types from 1986 to 2015 in the Pingshuo Mining area in northwest China. At the same time, used statistical analysis and mathematical models to study soil and vegetation carbon sequestration. Results indicate that the total carbon sequestration exhibits a significant downward trend from 4.58 × 106 Mg in 1986 to 3.78 × 106 Mg in 2015, with the decrease of soil carbon sequestration accounting for the largest proportion. The carbon sequestration of arable land accounted for 51% of the total carbon sequestration in the Mining area, followed by grassland (31%) and forestland (18%). Land reclamation contributed to the greatest increase in carbon sequestration of arable land from 17,890.15 Mg (1986) to 27,837.95 Mg (2015). Additionally, the downward trend in the carbon sequestration capacity of the Mining ecosystem was mitigated after 2010 as the positive effects of land reclamation gradually amplified over time and as the Mining techniques were greatly optimized in recent years in the Pingshuo Mining area. Thus, terrestrial carbon sequestration can be improved through land reclamation projects and optimized Mining activities. These results can help guide the utilization of reclaimed land in the future.
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dynamic changes in carbon sequestration from Opencast Mining activities and land reclamation in china s loess plateau
Sustainability, 2019Co-Authors: Boyu Yang, Zhongke Bai, Yingui Cao, Feng Xie, Junjie Zhang, Yannan WangAbstract:Opencast coal Mining causes serious damage to the natural landscape, resulting in the depletion of the carbon sequestration capacity in the Mining activity. There are few studies on the variation of carbon sequestration capabilities caused by land use changes in Opencast Mining areas. This paper uses six images were used to quantify the changes in land use types from 1986 to 2015 in the Pingshuo Mining area in northwest China. At the same time, used statistical analysis and mathematical models to study soil and vegetation carbon sequestration. Results indicate that the total carbon sequestration exhibits a significant downward trend from 4.58 × 106 Mg in 1986 to 3.78 × 106 Mg in 2015, with the decrease of soil carbon sequestration accounting for the largest proportion. The carbon sequestration of arable land accounted for 51% of the total carbon sequestration in the Mining area, followed by grassland (31%) and forestland (18%). Land reclamation contributed to the greatest increase in carbon sequestration of arable land from 17,890.15 Mg (1986) to 27,837.95 Mg (2015). Additionally, the downward trend in the carbon sequestration capacity of the Mining ecosystem was mitigated after 2010 as the positive effects of land reclamation gradually amplified over time and as the Mining techniques were greatly optimized in recent years in the Pingshuo Mining area. Thus, terrestrial carbon sequestration can be improved through land reclamation projects and optimized Mining activities. These results can help guide the utilization of reclaimed land in the future.
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Dynamic Changes in Carbon Sequestration from Opencast Mining Activities and Land Reclamation in China’s Loess Plateau
MDPI AG, 2019Co-Authors: Boyu Yang, Zhongke Bai, Yingui Cao, Feng Xie, Junjie Zhang, Yannan WangAbstract:Opencast coal Mining causes serious damage to the natural landscape, resulting in the depletion of the carbon sequestration capacity in the Mining activity. There are few studies on the variation of carbon sequestration capabilities caused by land use changes in Opencast Mining areas. This paper uses six images were used to quantify the changes in land use types from 1986 to 2015 in the Pingshuo Mining area in northwest China. At the same time, used statistical analysis and mathematical models to study soil and vegetation carbon sequestration. Results indicate that the total carbon sequestration exhibits a significant downward trend from 4.58 × 106 Mg in 1986 to 3.78 × 106 Mg in 2015, with the decrease of soil carbon sequestration accounting for the largest proportion. The carbon sequestration of arable land accounted for 51% of the total carbon sequestration in the Mining area, followed by grassland (31%) and forestland (18%). Land reclamation contributed to the greatest increase in carbon sequestration of arable land from 17,890.15 Mg (1986) to 27,837.95 Mg (2015). Additionally, the downward trend in the carbon sequestration capacity of the Mining ecosystem was mitigated after 2010 as the positive effects of land reclamation gradually amplified over time and as the Mining techniques were greatly optimized in recent years in the Pingshuo Mining area. Thus, terrestrial carbon sequestration can be improved through land reclamation projects and optimized Mining activities. These results can help guide the utilization of reclaimed land in the future
Stephen D. Wratten - One of the best experts on this subject based on the ideXlab platform.
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the potential of earthworms to restore ecosystem services after Opencast Mining a review
Basic and Applied Ecology, 2010Co-Authors: Stephane Boyer, Stephen D. WrattenAbstract:Abstract Opencast coal Mining has several environmental impacts, which require land rehabilitation when Mining operations are finished. For that reason, restoration after such extractive industries’ work is common and has been well studied. However, many ecological restoration schemes do not examine to what extent complete and functioning ecosystems have been restored above and below ground. While the aim should be to restore functioning ecosystems, most restoration plans focus only on vegetation and above ground macro-fauna. Among the potential species that are likely to be important early in mine land restoration, earthworms are particularly good candidates. They provide several ecosystem services that are likely to accelerate soil restoration, improve primary production and facilitate the restoration of a functional ecosystem in Mining areas. These services include the following: increase in topsoil fertility, food for a wide range of predators and recycling of waste organic materials on rehabilitated areas. Here, we outline some of the challenges specifically facing Opencast Mining restoration and describe how the ecosystem services provided by earthworms may address some of these challenges.
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The potential of earthworms to restore ecosystem services after Opencast Mining – A review
Basic and Applied Ecology, 2010Co-Authors: Stephane Boyer, Stephen D. WrattenAbstract:Abstract Opencast coal Mining has several environmental impacts, which require land rehabilitation when Mining operations are finished. For that reason, restoration after such extractive industries’ work is common and has been well studied. However, many ecological restoration schemes do not examine to what extent complete and functioning ecosystems have been restored above and below ground. While the aim should be to restore functioning ecosystems, most restoration plans focus only on vegetation and above ground macro-fauna. Among the potential species that are likely to be important early in mine land restoration, earthworms are particularly good candidates. They provide several ecosystem services that are likely to accelerate soil restoration, improve primary production and facilitate the restoration of a functional ecosystem in Mining areas. These services include the following: increase in topsoil fertility, food for a wide range of predators and recycling of waste organic materials on rehabilitated areas. Here, we outline some of the challenges specifically facing Opencast Mining restoration and describe how the ecosystem services provided by earthworms may address some of these challenges.
C. Bhar - One of the best experts on this subject based on the ideXlab platform.
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Overall Equipment Effectiveness of Shovel-Dumper Operation in Opencast Mining–A Review
2020Co-Authors: Shobhana Dey, S. K. Mandal, C. BharAbstract:One of the principal costs in Opencast mine is related to application of loading and haulage equipment. The real challenge of mine management of an Opencast mines is to select the proper fleet size of dumpers and shovels and to utilize them effectively; it secures the production needs of a mine as well as minimizes costs of production. Overall equipment effectiveness can be used as a tool to measure the performance and utilization of shovel-dumper operation in Opencast mines. Authors of the paper have discussed on the cycle time of shovel and dumper, their dispatching and allocation problem and proper combination in Opencast Mining operation to optimize the productivity and to reduce the operational cost after reviewing several research artcles.
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overall equipment effectiveness of shovel dumper operation in Opencast Mining a review
International Conference on Multimedia Information Networking and Security, 2020Co-Authors: Shobhana Dey, S. K. Mandal, C. BharAbstract:One of the principal costs in Opencast mine is related to application of loading and haulage equipment. The real challenge of mine management of an Opencast mines is to select the proper fleet size of dumpers and shovels and to utilize them effectively; it secures the production needs of a mine as well as minimizes costs of production. Overall equipment effectiveness can be used as a tool to measure the performance and utilization of shovel-dumper operation in Opencast mines. Authors of the paper have discussed on the cycle time of shovel and dumper, their dispatching and allocation problem and proper combination in Opencast Mining operation to optimize the productivity and to reduce the operational cost after reviewing several research artcles.
