Pub Date : 2022-02-28DOI: 10.17265/2328-2193/2022.01.001
Maria Chatziangelou, Costas Anagnostopoulos
{"title":"The Effectiveness of Blastability Quality System on Rock Slopes: A Case Study in a Landslide Restoration","authors":"Maria Chatziangelou, Costas Anagnostopoulos","doi":"10.17265/2328-2193/2022.01.001","DOIUrl":"https://doi.org/10.17265/2328-2193/2022.01.001","url":null,"abstract":"","PeriodicalId":66051,"journal":{"name":"地质资源与工程:英文版","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43088878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-10-28DOI: 10.17265/2328-2193/2020.05.005
A. K. Jha
: Limestone being sedimentary rock contains multiple bedding planes, which has vertical cracks or joints. As explosives apply high dynamic loading rate during blasting i.e. rock fragmentation & comminution process, the measure of critical SIF (stress intensity factor) is pertinent to be measured and is known as dynamic fracture toughness of limestone. In order to investigate the influence of several factors on the mode-I fracture toughness and fracture behavior of limestone, dynamic fracture toughness tests (mode-I) were conducted under various conditions of loading rate. The microstructure of rocks was also investigated to understand the dynamic fracture toughness and fracture mechanism of limestone. This paper deals with results of 11 limestone specimen subjected to dynamic fracture toughness tests. It was observed that crack surface velocity increases with increase in dynamic fracture toughness. The fracture velocity also increases with increase in dynamic fracture toughness. The fracture velocity in limestone increases between 1.14-5.09 times with increased fracture toughness. The crack surface velocity of limestone increases between 1.39-3.09 times with increase in dynamic fracture toughness.
{"title":"Dynamic Fracture Toughness Tests on Limestone","authors":"A. K. Jha","doi":"10.17265/2328-2193/2020.05.005","DOIUrl":"https://doi.org/10.17265/2328-2193/2020.05.005","url":null,"abstract":": Limestone being sedimentary rock contains multiple bedding planes, which has vertical cracks or joints. As explosives apply high dynamic loading rate during blasting i.e. rock fragmentation & comminution process, the measure of critical SIF (stress intensity factor) is pertinent to be measured and is known as dynamic fracture toughness of limestone. In order to investigate the influence of several factors on the mode-I fracture toughness and fracture behavior of limestone, dynamic fracture toughness tests (mode-I) were conducted under various conditions of loading rate. The microstructure of rocks was also investigated to understand the dynamic fracture toughness and fracture mechanism of limestone. This paper deals with results of 11 limestone specimen subjected to dynamic fracture toughness tests. It was observed that crack surface velocity increases with increase in dynamic fracture toughness. The fracture velocity also increases with increase in dynamic fracture toughness. The fracture velocity in limestone increases between 1.14-5.09 times with increased fracture toughness. The crack surface velocity of limestone increases between 1.39-3.09 times with increase in dynamic fracture toughness.","PeriodicalId":66051,"journal":{"name":"地质资源与工程:英文版","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43693249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-10-28DOI: 10.17265/2328-2193/2020.05.001
S. I. Shtel’makh
: Determining the contents of F, S (total) , and Cl in the studied samples of the limestone and marbles with high calcite contents was carried out by the nondestructive method of WDXRFS (Wavelength Dispersive X-ray Fluorescence Spectrometry). All measurements were performed in a vacuum condition using a WDXRF spectrometer S8 TIGER (Bruker AXS, Germany). The studied samples have wide ranges of F, S (total) , and Cl contents, and high concentration of calcite (89.5%-99%). Main objective of this research is to develop WDXRF (WD X-ray fluorescence) technique for the determination of F, S (total) , and Cl. The calculated values of the ILD (instrumental limit of the detection) were within the interval from 3 for S (total) to 37 for F mg/kg. The repeatability was found to be satisfactory with the relative standard deviations lower than 7%.
{"title":"Determination of F, S(total), and Cl in the Calcite Rich Limestone and Marbles by WD-XRF Spectrometry","authors":"S. I. Shtel’makh","doi":"10.17265/2328-2193/2020.05.001","DOIUrl":"https://doi.org/10.17265/2328-2193/2020.05.001","url":null,"abstract":": Determining the contents of F, S (total) , and Cl in the studied samples of the limestone and marbles with high calcite contents was carried out by the nondestructive method of WDXRFS (Wavelength Dispersive X-ray Fluorescence Spectrometry). All measurements were performed in a vacuum condition using a WDXRF spectrometer S8 TIGER (Bruker AXS, Germany). The studied samples have wide ranges of F, S (total) , and Cl contents, and high concentration of calcite (89.5%-99%). Main objective of this research is to develop WDXRF (WD X-ray fluorescence) technique for the determination of F, S (total) , and Cl. The calculated values of the ILD (instrumental limit of the detection) were within the interval from 3 for S (total) to 37 for F mg/kg. The repeatability was found to be satisfactory with the relative standard deviations lower than 7%.","PeriodicalId":66051,"journal":{"name":"地质资源与工程:英文版","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47477464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-10-28DOI: 10.17265/2328-2193/2020.05.003
E. Nhambire, Celso Alexandre Vidigal Chivale, Z. Ombe, B. Bernardo
Coastal change has merited attention because of heated arguments in the literature on this subject at national, regional, southern African, and international levels. The city of Maputo, the capital of Mozambique, which had been undergoing intense coastal erosion actions, was the target of large-scale intervention aimed at halting the advance of the sea and the consequent destruction of infrastructure. Coastal protection consisted of soft forms, artificial feeding, and heavy, longitudinal and transversal structures. This study was carried out along the protected line, about 3 km long, and aims to understand the morphological transformations in the Maputo city shoreline that occurred after the coastal protection. For that, the following technical methods were used: observation, a topographic survey of the beach cross-sections, and the shoreline evolution before and after coastal protection using 2008 and 2010 Google Earth satellite imagery prior to protection 2015, project completion year and 2018 monitoring year. The findings of the study revealed that the causes of coastal erosion persist, like constant removal by deflation of the borrowed sediment. Besides, vertical structures (groynes) intensify erosion in the downdrift while adherent structures interrupt the return of sediment deposited on the sidewalk and the road. The beach that experienced a positive sedimentary balance with artificial feeding has been losing more sediment than it gets. The transversal profiles show the beach shore has depressions that are submerged in the presence of high tides, bringing the sea closer to the adherent structure. Despite the sped up erosion observed, embryonic dunes were detected in some parts of the beach, signs of the establishment of dynamic equilibrium, becoming sites of sand accumulation and sediment source to the beach, through the exchange between the dune and the beach. With these results, a pilot station for artificial dune construction is being designed for beach stability.
{"title":"Morphological Changes Induced by Coastal Protection on the Coast of Maputo City, Mozambique","authors":"E. Nhambire, Celso Alexandre Vidigal Chivale, Z. Ombe, B. Bernardo","doi":"10.17265/2328-2193/2020.05.003","DOIUrl":"https://doi.org/10.17265/2328-2193/2020.05.003","url":null,"abstract":"Coastal change has merited attention because of heated arguments in the literature on this subject at national, regional, southern African, and international levels. The city of Maputo, the capital of Mozambique, which had been undergoing intense coastal erosion actions, was the target of large-scale intervention aimed at halting the advance of the sea and the consequent destruction of infrastructure. Coastal protection consisted of soft forms, artificial feeding, and heavy, longitudinal and transversal structures. This study was carried out along the protected line, about 3 km long, and aims to understand the morphological transformations in the Maputo city shoreline that occurred after the coastal protection. For that, the following technical methods were used: observation, a topographic survey of the beach cross-sections, and the shoreline evolution before and after coastal protection using 2008 and 2010 Google Earth satellite imagery prior to protection 2015, project completion year and 2018 monitoring year. The findings of the study revealed that the causes of coastal erosion persist, like constant removal by deflation of the borrowed sediment. Besides, vertical structures (groynes) intensify erosion in the downdrift while adherent structures interrupt the return of sediment deposited on the sidewalk and the road. The beach that experienced a positive sedimentary balance with artificial feeding has been losing more sediment than it gets. The transversal profiles show the beach shore has depressions that are submerged in the presence of high tides, bringing the sea closer to the adherent structure. Despite the sped up erosion observed, embryonic dunes were detected in some parts of the beach, signs of the establishment of dynamic equilibrium, becoming sites of sand accumulation and sediment source to the beach, through the exchange between the dune and the beach. With these results, a pilot station for artificial dune construction is being designed for beach stability.","PeriodicalId":66051,"journal":{"name":"地质资源与工程:英文版","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46654538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-10-28DOI: 10.17265/2328-2193/2020.05.002
Hycham Abdesslam Kazi Tani, A. Bouanani, Kamila Baba-HamedKamila, J. Probst
This article focuses on the study of sediment transport during flood events in the Oued Nachef watershed that feeds the Mefrouche dam. To understand the sediment dynamics in this watershed, ANRH data on instantaneous water discharges and the respective concentrations of suspended particulate matter were used. This enabled the selection of some of the largest flood events over a 24-year period in order to establish the log-log relationships between sediment load (concentration and flux) and water discharge. However, the discharge-concentration relationships revealed hysteresis phenomena that enabled a flood typology to be established and classified into seven categories, thus showing very different transfer dynamics in relation to flood events. The results showed that Category 6 floods presenting hysteresis in the form of a figure of eight exported almost 44% of the suspended particulate matter load while representing just 29% of the flow discharge.
{"title":"The Dynamics of Suspended Particulate Matter in the Oued Nachef (Tafna Basin, Algeria): Typology of Flood Events and Contribution to Sediment Transport","authors":"Hycham Abdesslam Kazi Tani, A. Bouanani, Kamila Baba-HamedKamila, J. Probst","doi":"10.17265/2328-2193/2020.05.002","DOIUrl":"https://doi.org/10.17265/2328-2193/2020.05.002","url":null,"abstract":"This article focuses on the study of sediment transport during flood events in the Oued Nachef watershed that feeds the Mefrouche dam. To understand the sediment dynamics in this watershed, ANRH data on instantaneous water discharges and the respective concentrations of suspended particulate matter were used. This enabled the selection of some of the largest flood events over a 24-year period in order to establish the log-log relationships between sediment load (concentration and flux) and water discharge. However, the discharge-concentration relationships revealed hysteresis phenomena that enabled a flood typology to be established and classified into seven categories, thus showing very different transfer dynamics in relation to flood events. The results showed that Category 6 floods presenting hysteresis in the form of a figure of eight exported almost 44% of the suspended particulate matter load while representing just 29% of the flow discharge.","PeriodicalId":66051,"journal":{"name":"地质资源与工程:英文版","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47699581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-28DOI: 10.17265/2328-2193/2020.04.005
J. Svoreň
: Studies of inclusions (defects) in minerals have shown that the source of carbon in the natural processes of synthesis of perfect diamond crystals is mantle carbon dioxide, ( СО 2 ) Р = 6.1 М P а and δ 13 С = (-6.1±0.5)‰. A new mechanism for the synthesis of natural crystals of diamond, pyrope, magnetite, quartz, etc. has been developed. It is shown that under the influence of a powerful pulse of tectonogenic energy in some parts of the lithosphere that there are deep faults-tubes, which take root-migrating melt in the direction of the earth’s crust. During migration in the contact zone—“melt-lithosphere rocks” due to their contact interaction-friction, a high-voltage electric field of complex shape is formed, in which CO 2 turns into an energy-excited state, its molecules decompose into individual radicals and atoms. In the melt-electrolyte under the influence of an electric field, ions-cations move in certain directions depending on the configuration of the field, which is due to magma, contact with rocks of the lithosphere and the speed of magma in the gap-tube. As they move, these ions undergo numerous collisions with the molecules present there, in particular, СО 2 and its atoms and radicals, temporarily forming unstable compounds that fall into the zone with existing iron compounds, etc. Oxygen СО 2 poatomically detaches from the molecule and forms FeO · Fe 2 O 3 (magnetite), and the most energetically advantageous for chemically active carbon atoms in such an environment is that the melt bonds together form a diamond crystal. The isolated SiO 2 molecules chemically form a group of garnets, quartz, and the like.
{"title":"Subsoil Natural Physico-Chemical Reactor: Regularity of Natural Processes of Synthesis of Perfect Diamond Crystals","authors":"J. Svoreň","doi":"10.17265/2328-2193/2020.04.005","DOIUrl":"https://doi.org/10.17265/2328-2193/2020.04.005","url":null,"abstract":": Studies of inclusions (defects) in minerals have shown that the source of carbon in the natural processes of synthesis of perfect diamond crystals is mantle carbon dioxide, ( СО 2 ) Р = 6.1 М P а and δ 13 С = (-6.1±0.5)‰. A new mechanism for the synthesis of natural crystals of diamond, pyrope, magnetite, quartz, etc. has been developed. It is shown that under the influence of a powerful pulse of tectonogenic energy in some parts of the lithosphere that there are deep faults-tubes, which take root-migrating melt in the direction of the earth’s crust. During migration in the contact zone—“melt-lithosphere rocks” due to their contact interaction-friction, a high-voltage electric field of complex shape is formed, in which CO 2 turns into an energy-excited state, its molecules decompose into individual radicals and atoms. In the melt-electrolyte under the influence of an electric field, ions-cations move in certain directions depending on the configuration of the field, which is due to magma, contact with rocks of the lithosphere and the speed of magma in the gap-tube. As they move, these ions undergo numerous collisions with the molecules present there, in particular, СО 2 and its atoms and radicals, temporarily forming unstable compounds that fall into the zone with existing iron compounds, etc. Oxygen СО 2 poatomically detaches from the molecule and forms FeO · Fe 2 O 3 (magnetite), and the most energetically advantageous for chemically active carbon atoms in such an environment is that the melt bonds together form a diamond crystal. The isolated SiO 2 molecules chemically form a group of garnets, quartz, and the like.","PeriodicalId":66051,"journal":{"name":"地质资源与工程:英文版","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44837878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-28DOI: 10.17265/2328-2193/2020.04.004
A. K. Jha
: The dynamic properties of limestone play a pivotal role while selecting the suitable explosives for any limestone mine. Since the application of explosives creates dynamic loading and is a dynamic event, the determination of dynamic modulus values is technically more appropriate than the static measurement. The rock fragmentation would significantly improve by investigating the dynamic uniaxial compressive strength as specific fracture energy, stress intensity factor, fracture toughness of any detonating blast hole depend heavily on dynamic rock property and not on static rock property. Most of the limestone projects globally are still accustomed with using static compressive strength to understand the rock fragmentation. The present papers deal with determination of dynamic uniaxial compressive property using split Hopkinson pressure bar (SHPB) system. The nano second high speed camera with laser captures the crack surface opening velocity during dynamic loading. It was observed during data analysis that dynamic compressive strength of limestone increases by 1.7-4.9 times of the static strength. It may be concluded by the study that determination of dynamic compressive strength is paramount for understanding the rock fragmentation.
{"title":"Dynamic Uniaxial Compressive Tests on Limestone","authors":"A. K. Jha","doi":"10.17265/2328-2193/2020.04.004","DOIUrl":"https://doi.org/10.17265/2328-2193/2020.04.004","url":null,"abstract":": The dynamic properties of limestone play a pivotal role while selecting the suitable explosives for any limestone mine. Since the application of explosives creates dynamic loading and is a dynamic event, the determination of dynamic modulus values is technically more appropriate than the static measurement. The rock fragmentation would significantly improve by investigating the dynamic uniaxial compressive strength as specific fracture energy, stress intensity factor, fracture toughness of any detonating blast hole depend heavily on dynamic rock property and not on static rock property. Most of the limestone projects globally are still accustomed with using static compressive strength to understand the rock fragmentation. The present papers deal with determination of dynamic uniaxial compressive property using split Hopkinson pressure bar (SHPB) system. The nano second high speed camera with laser captures the crack surface opening velocity during dynamic loading. It was observed during data analysis that dynamic compressive strength of limestone increases by 1.7-4.9 times of the static strength. It may be concluded by the study that determination of dynamic compressive strength is paramount for understanding the rock fragmentation.","PeriodicalId":66051,"journal":{"name":"地质资源与工程:英文版","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41979065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-02-28DOI: 10.17265/2328-2193/2020.01.002
J. Svoreň
: The previously unknown different chemical properties of carbon isotopes in natural processes of synthesis-formation of different carbon-containing compounds, in particular of the more difficult (13C) carbon isotope in the processes of synthesis of solid carbon-containing compounds: carbonates, diamonds and, respectively, lighter (12C) synthetic isotopes, including methane have been established.
{"title":"Various Chemical Properties of Carbon Isotopes in Natural Synthesis of Different Compounds","authors":"J. Svoreň","doi":"10.17265/2328-2193/2020.01.002","DOIUrl":"https://doi.org/10.17265/2328-2193/2020.01.002","url":null,"abstract":": The previously unknown different chemical properties of carbon isotopes in natural processes of synthesis-formation of different carbon-containing compounds, in particular of the more difficult (13C) carbon isotope in the processes of synthesis of solid carbon-containing compounds: carbonates, diamonds and, respectively, lighter (12C) synthetic isotopes, including methane have been established.","PeriodicalId":66051,"journal":{"name":"地质资源与工程:英文版","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43222179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-08-28DOI: 10.17265/2328-2193/2019.04.002
Oleksandr Burachok, Oleksandr Kondrat
{"title":"Geothermal Energy Production Potential from Oil and Gas Fields in Western Ukraine","authors":"Oleksandr Burachok, Oleksandr Kondrat","doi":"10.17265/2328-2193/2019.04.002","DOIUrl":"https://doi.org/10.17265/2328-2193/2019.04.002","url":null,"abstract":"","PeriodicalId":66051,"journal":{"name":"地质资源与工程:英文版","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45033236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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