The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform

Masamitsu Kurisu - One of the best experts on this subject based on the ideXlab platform.

  • field experiment report for exploration of abandoned Lignite Mines with teleinvestigation robot system
    International Symposium on Safety Security and Rescue Robotics, 2017
    Co-Authors: Hiroyasu Miura, Ayaka Watanabe, Masayuki Okugawa, Susumu Kurahashi, Masamitsu Kurisu
    Abstract:

    The risk of collapse and subsidence of the abandoned Lignite Mines has been mentioned in Tokai region of Japan. The filling of the cavity is still being advanced. There is no cavity map in the abandoned Lignite Mines, and it is required to grasp and explore of the underground space in order to estimate the amount of the filling material. By a request from Mitake-cho in Gifu Prefecture, we got the opportunity to explore the inside of an abandoned Lignite mine by using our robot system. Prior to the exploration of the actual abandoned Lignite mine, as feasibility study, an experimental test field that simulated the elements of abandoned Lignite mine was prepared in outdoor. Some experimentations were performed and the explore robot system was evaluated in this study. This paper described about the lessons learned from the feasibility study.

  • SSRR - Field experiment report for exploration of abandoned Lignite Mines with teleinvestigation robot system
    2017 IEEE International Symposium on Safety Security and Rescue Robotics (SSRR), 2017
    Co-Authors: Hiroyasu Miura, Ayaka Watanabe, Masayuki Okugawa, Susumu Kurahashi, Masamitsu Kurisu
    Abstract:

    The risk of collapse and subsidence of the abandoned Lignite Mines has been mentioned in Tokai region of Japan. The filling of the cavity is still being advanced. There is no cavity map in the abandoned Lignite Mines, and it is required to grasp and explore of the underground space in order to estimate the amount of the filling material. By a request from Mitake-cho in Gifu Prefecture, we got the opportunity to explore the inside of an abandoned Lignite mine by using our robot system. Prior to the exploration of the actual abandoned Lignite mine, as feasibility study, an experimental test field that simulated the elements of abandoned Lignite mine was prepared in outdoor. Some experimentations were performed and the explore robot system was evaluated in this study. This paper described about the lessons learned from the feasibility study.

Hiroyasu Miura - One of the best experts on this subject based on the ideXlab platform.

  • field experiment report for exploration of abandoned Lignite Mines with teleinvestigation robot system
    International Symposium on Safety Security and Rescue Robotics, 2017
    Co-Authors: Hiroyasu Miura, Ayaka Watanabe, Masayuki Okugawa, Susumu Kurahashi, Masamitsu Kurisu
    Abstract:

    The risk of collapse and subsidence of the abandoned Lignite Mines has been mentioned in Tokai region of Japan. The filling of the cavity is still being advanced. There is no cavity map in the abandoned Lignite Mines, and it is required to grasp and explore of the underground space in order to estimate the amount of the filling material. By a request from Mitake-cho in Gifu Prefecture, we got the opportunity to explore the inside of an abandoned Lignite mine by using our robot system. Prior to the exploration of the actual abandoned Lignite mine, as feasibility study, an experimental test field that simulated the elements of abandoned Lignite mine was prepared in outdoor. Some experimentations were performed and the explore robot system was evaluated in this study. This paper described about the lessons learned from the feasibility study.

  • SSRR - Field experiment report for exploration of abandoned Lignite Mines with teleinvestigation robot system
    2017 IEEE International Symposium on Safety Security and Rescue Robotics (SSRR), 2017
    Co-Authors: Hiroyasu Miura, Ayaka Watanabe, Masayuki Okugawa, Susumu Kurahashi, Masamitsu Kurisu
    Abstract:

    The risk of collapse and subsidence of the abandoned Lignite Mines has been mentioned in Tokai region of Japan. The filling of the cavity is still being advanced. There is no cavity map in the abandoned Lignite Mines, and it is required to grasp and explore of the underground space in order to estimate the amount of the filling material. By a request from Mitake-cho in Gifu Prefecture, we got the opportunity to explore the inside of an abandoned Lignite mine by using our robot system. Prior to the exploration of the actual abandoned Lignite mine, as feasibility study, an experimental test field that simulated the elements of abandoned Lignite mine was prepared in outdoor. Some experimentations were performed and the explore robot system was evaluated in this study. This paper described about the lessons learned from the feasibility study.

Chariton Sahanidis - One of the best experts on this subject based on the ideXlab platform.

  • Chemical characterization and receptor modeling of PM_10 in the surroundings of the opencast Lignite Mines of Western Macedonia, Greece
    Environmental Science and Pollution Research, 2018
    Co-Authors: Constantini Samara, George Argyropoulos, Theodoros Grigoratos, Αthanasios Kouras, Εvangelia Manoli, Symela Andreadou, Fragkiskos Pavloudakis, Chariton Sahanidis
    Abstract:

    The Western Macedonian Lignite Center (WMLC) in northwestern Greece is the major Lignite center in the Balkans feeding four major power plants of total power exceeding 4 GW. Concentrations of PM_10 (i.e., particulate matters with diameters ≤10 μm) are the main concern in the region, and the high levels observed are often attributed to the activities related to power generation. In this study, the contribution of fugitive dust emissions from the opencast Lignite Mines to the ambient levels of PM_10 in the surroundings was estimated by performing chemical mass balance (CMB) receptor modeling. For this purpose, PM_10 samples were concurrently collected at four receptor sites located in the periphery of the mine area during the cold and the warm periods of the year (November–December 2011 and August–September 2012), and analyzed for a total of 26 macro- and trace elements and ionic species (sulfate, nitrate, chloride). The robotic chemical mass balance (RCMB) model was employed for source identification/apportionment of PM_10 at each receptor site using as inputs the ambient concentrations and the chemical profiles of various sources including the major mine operations, the fly ash escaping the electrostatic filters of the power plants, and other primary and secondary sources. Mean measured PM_10 concentrations at the different sites ranged from 38 to 72 μg m^−3. The estimated total contribution of Mines ranged between 9 and 22% in the cold period increasing to 36–42% in the dry warm period. Other significant sources were vehicular traffic, biomass burning, and secondary sulfate and nitrate aerosol. These results imply that more efficient measures to prevent and suppress fugitive dust emissions from the Mines are needed.

  • chemical characterization and receptor modeling of pm10 in the surroundings of the opencast Lignite Mines of western macedonia greece
    Environmental Science and Pollution Research, 2018
    Co-Authors: Constantini Samara, George Argyropoulos, Theodoros Grigoratos, Αthanasios Kouras, Symela Andreadou, Fragkiskos Pavloudakis, E Manoli, Chariton Sahanidis
    Abstract:

    The Western Macedonian Lignite Center (WMLC) in northwestern Greece is the major Lignite center in the Balkans feeding four major power plants of total power exceeding 4 GW. Concentrations of PM10 (i.e., particulate matters with diameters ≤10 μm) are the main concern in the region, and the high levels observed are often attributed to the activities related to power generation. In this study, the contribution of fugitive dust emissions from the opencast Lignite Mines to the ambient levels of PM10 in the surroundings was estimated by performing chemical mass balance (CMB) receptor modeling. For this purpose, PM10 samples were concurrently collected at four receptor sites located in the periphery of the mine area during the cold and the warm periods of the year (November–December 2011 and August–September 2012), and analyzed for a total of 26 macro- and trace elements and ionic species (sulfate, nitrate, chloride). The robotic chemical mass balance (RCMB) model was employed for source identification/apportionment of PM10 at each receptor site using as inputs the ambient concentrations and the chemical profiles of various sources including the major mine operations, the fly ash escaping the electrostatic filters of the power plants, and other primary and secondary sources. Mean measured PM10 concentrations at the different sites ranged from 38 to 72 μg m−3. The estimated total contribution of Mines ranged between 9 and 22% in the cold period increasing to 36–42% in the dry warm period. Other significant sources were vehicular traffic, biomass burning, and secondary sulfate and nitrate aerosol. These results imply that more efficient measures to prevent and suppress fugitive dust emissions from the Mines are needed.

Alok Kumar - One of the best experts on this subject based on the ideXlab platform.

  • Assessment of Thermal Maturity, Source Rock Potential and Paleodepositional Environment of the Paleogene Lignites in Barsingsar, Bikaner–Nagaur Basin, Western Rajasthan, India
    Natural Resources Research, 2019
    Co-Authors: Alok K. Singh, Alok Kumar
    Abstract:

    Investigations on the Paleogene Lignites were carried out through geochemical, mineralogical and petrographic analyses to assess their paleodepositional environment, source rock potential and thermal maturity. The samples were collected from the Barsingsar Lignite Mines in the Bikaner–Nagaur Basin, Western Rajasthan, India. Huminite reflectance assigns these samples as Lignite (low-rank coal). Barsingsar Lignites are dominated by the huminite maceral group, while inertinites and liptinites occur in subordinated amount. The mineral matter is dominated by carbonates, pyrite and argillaceous (in descending order). Gelification index, tissue preservation index, groundwater index and vegetation index indicate the prevalence of a dry forest swamp having ombrotrophic to mesotrophic conditions in the paleomire. Rock–Eval pyrolysis indicates high hydrogen index relative to oxygen index and excellent hydrocarbon potential. The Barsingsar Lignites are characterized by mixed type III and type II kerogens, which are thermally immature. Several minerals like quartz, coesite, siderite, aragonite and rutile minerals have been identified by XRD analysis, whereas selected trace elements primarily Sr, Zr, Cu, Pb, Zn, Cr, V, Ni, Rb and Co were also detected. Fourier-transform infrared spectroscopy pattern shows the dominance of clay minerals and the presence of aromatic, aliphatic and some oxygen functional groups in these Lignites.

  • Petro-chemical characterisation and depositional paleoenvironment of Lignite deposits of Nagaur, Western Rajasthan, India
    Environmental Earth Sciences, 2017
    Co-Authors: Alok K. Singh, Alok Kumar
    Abstract:

    The objective of this study was to know about the depositional environment and petrographic characteristics of Lignite deposits of the Nagaur district, Rajasthan, India, and to decipher source rock potential. Lignite samples have been collected from all the working and exposed Lignite seams from Matasukh Lignite Mines of Nagaur following the pillar sampling method. The petrographic study has been done following the International Committee for Coal and Organic Petrology and ISO norms. The study has shown that Nagaur Lignites are mostly dominated by the huminite group of macerals followed by liptinite group. The huminite group is mainly represented by attrinite, textinite and ulminite, whereas liptinite is represented mainly by primary liptinites such as resinite, sporinite, suberinite and cutinite. An inertinite group of macerals occurs in the least concentration as compared to the huminite and liptinite group macerals and mainly represented by the semifusinite, funginite and inertodetrinite. In these Lignites, carbonate mineral matters are dominating over the pyrite and argillaceous mineral matter. The maceral constituents present in the studied samples indicate a high proportion of type III kerogen and are capable of generating gases only. Based on the reflectance of Eu-ulminite B maceral, Nagaur Lignites may be classified as ‘Low-rank B’ (Lignite B). The study reveals that Lignites originated in the bog forest under ombrotrophic to mesotrophic hydrological conditions. Gelification Index and the Tissue Preservation Index suggest an accumulation of peat in the marshy environment.

Khaled Hasan - One of the best experts on this subject based on the ideXlab platform.

  • Overburden Characterization as Topsoil Replacement at Jewett and Other Texas Lignite Mines—Texture and pH Indicators
    Environmental & Engineering Geoscience, 1995
    Co-Authors: Khaled Hasan
    Abstract:

    Evaluation of the suitability of overburden as topsoil replacement material at the Jewett Lignite mine was conducted with an emphasis on the textural criteria and geochemical parameters. Attempts were made to determine the relationships between geologic units and their chemical properties, especially the parameters that are indicative of their suitability for use as topsoil replacement materials. These parameters included pH values, texture and elemental composition. Little workable correlation was found to predict the usefulness of overburden as topsoil replacement material. The only exception was a massive coarse to medium channel-fill sand that was found within the Calvert Bluff and Carrizo formations. This channel sand had somewhat consistent pH values. For this geologic unit only, the environment of deposition can be used as a predictive and planning tool to locate suitable topsoil replacement material in the Jewett Lignite mine. Comparing the results of similar studies in other Mines within the same geological setting in Texas leads one to accept textural and geochemical variability as the rule. However, the channel-fill sand bodies are present throughout this Lignite belt and maintain consistency in geochemical properties which are acceptable by the regulating guidelines. The high sand content can be corrected by mixing silt andmore » clay present within the sand bodies. It is recommended that by choosing this sediment unit as the topsoil replacement material in these Mines, the reclamation process can be made more efficient and cost effective.« less

  • overburden characterization as topsoil replacement at jewett and other texas Lignite Mines texture and ph indicators
    Environmental & Engineering Geoscience, 1995
    Co-Authors: Khaled Hasan
    Abstract:

    Evaluation of the suitability of overburden as topsoil replacement material at the Jewett Lignite mine was conducted with an emphasis on the textural criteria and geochemical parameters. Attempts were made to determine the relationships between geologic units and their chemical properties, especially the parameters that are indicative of their suitability for use as topsoil replacement materials. These parameters included pH values, texture and elemental composition. Little workable correlation was found to predict the usefulness of overburden as topsoil replacement material. The only exception was a massive coarse to medium channel-fill sand that was found within the Calvert Bluff and Carrizo formations. This channel sand had somewhat consistent pH values. For this geologic unit only, the environment of deposition can be used as a predictive and planning tool to locate suitable topsoil replacement material in the Jewett Lignite mine. Comparing the results of similar studies in other Mines within the same geological setting in Texas leads one to accept textural and geochemical variability as the rule. However, the channel-fill sand bodies are present throughout this Lignite belt and maintain consistency in geochemical properties which are acceptable by the regulating guidelines. The high sand content can be corrected by mixing silt andmore » clay present within the sand bodies. It is recommended that by choosing this sediment unit as the topsoil replacement material in these Mines, the reclamation process can be made more efficient and cost effective.« less