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Zambia
This project aims to reduce water scarcity in poorly weathered crystalline basement areas affected by poor drilling success rates in Zambia's rural communities specifically, in rural areas of Zimba District in Southern Province by: using 2D-resistivity [(i.e., Electrical Resistivity Tomography (ERT)], Frequency-Domain ElectroMagnetic (FDEM), total field magnetics, and Time Domain EM (TDEM). Kujana will support the health and wellbeing of its beneficiaries, and through lessened water collection time improve access to equitable education for women and girls and support gender equality by providing women with more opportunity to participate in the leadership and economy of their community.
This project aims to improve the productivity of Lake Tanganyika's fishery in Zambia, by securing food resources and improving the health of thousands of villagers in the vicinity of the Nsumbu Tanganyika Conservation Project co-management area, by using high-resolution geophysics and limnogeological sampling (sediment cores and dredge samples), detailed echosounding, side-scan sonar, and CHIRP seismic reflection profiling, and providing the scientific foundation for defining coastal "no-catch" zones that will be monitored and maintained by local villagers, allowing the health and productivity of fish stocks to recover.
Porosity of Source Rocks Eligible for Interaction with Gases and Liquids
Rimnácová, Daniela (Institute of Rock Structure and Mechanics of the Czech Academy of Sciences, Czech Republic) | Vöröš, Dominik (Institute of Rock Structure and Mechanics of the Czech Academy of Sciences, Czech Republic) | Natherová, Vendula (Faculty of Science, Charles University in Prague, Czech Republic) | Prikryl, Richard (Faculty of Science, Charles University in Prague, Czech Republic) | Lokajícek, Tomáš (Institute of Geology of the Czech Academy of Sciences, Czech Republic)
ABSTRACT: The extent of the porosity of different source rocks may vary with their composition, weathering of the bedrock etc. To determine the further use of source rocks, it is necessary to understand and describe their physicochemical properties. Complex textural analyses of source rocks with variable amounts of organic matter were carried out using N2 and CO2 sorption, scanning electron microscopy and mercury intrusion porosimetry. The total adsorption of CO2 ranged from 0.03 to 1.5 mmol/g. The porosity and the pore size distribution varied according to the origin of the studied samples. The porosity ranged from 0.2% to 21%. Lower porosity values indicated a connection with gas capturing. Higher porosity values can be explained by the presence of macropores and larger pores, serving mainly for the migration of gases and liquids. Monitoring of sorption properties can provide a scientific basis for the safe utilization of reservoirs and rock layers. INTRODUCTION The genesis of rocks, geological processes and the degree of stress over time, and also chemical composition of rocks, affect the pore network. Precise high-tech instruments and technology are currently available, so it is possible to study the structural and textural parameters of solid porous materials in detail. Knowledge of the interconnections between all factors and the pore network helps us to understand the upcoming physical processes in rock massifs (Guével et al. 2022, Ishola et al. 2022). The network of pores in rocks is variable, and the different pore sizes, shapes and types have a diverse influence on their permeability and on the formation/adsorption/motion of gases and liquids in the pore space (Liu et al. 2020). Even a seemingly non-porous material can have some pores, which are classified to size classes as micropores (< 2 nm), mesopores (2 – 50 nm), and macropores (> 50 nm) (Everett 1972, Thommes et al. 2015). Molecules migrating from the injection site through macropores and coarse pores can be captured in micropores and in low-dimensional mesopores. Physical adsorption is the most probable mechanism where micropores play a key role (Choma et al. 2021). Conversely, macropores and coarse pores influence permeability, and serve as transport pathways for liquids and macromolecular compounds (Saurabh et al. 2022). Differences between the sorption of organic and inorganic substances are evident in the adsorption process. These are mainly differences in molecular structure. The number of adsorbed molecules depends on the size and shape of the pores in relation to the shape and size of the trapped molecule.
- Europe > Czechia (0.32)
- Africa > Zambia > Southern Province > Choma (0.25)
- Geology > Geological Subdiscipline > Economic Geology > Petroleum Geology (1.00)
- Geology > Rock Type > Sedimentary Rock > Organic-Rich Rock > Coal (0.50)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Mudrock (0.36)
Impoverished communities living along the shores of Lake Tanganyika (sub-Saharan eastern Africa) depend on fish for high-protein sustenance and cash income. Climate change, destructive fishing practices, and siltation (sediment pollution of nearshore spawning grounds from slash and burn deforestation) pose severe threats to Lake Tanganyika's fisheries. These pressures have been accelerating over the past several decades, driven by explosive population growth and refugee influx to the region. Collapse of Lake Tanganyika's fisheries represents a looming humanitarian and ecological disaster that is widely acknowledged. However, few harmonized efforts have been undertaken to protect food security and safeguard the health and wellness of poor people that rely on fish for their nutrition.
- Food & Agriculture > Fishing (0.84)
- Food & Agriculture > Agriculture (0.62)
- Health & Medicine > Consumer Health (0.57)
Prof. Michael McGlue, Prof. Kevin Yeager, Njahi Mwangala (graduate student), Leandro Dominogs-Luz (graduate student), Kim Schindler (laboratory technician) (University of Kentucky) Prof. Michael Soreghan, Elisha Miller (graduate student) (University of Oklahoma) Craig Zytkow (project director) (Frankfurt Zoological Society) Danny Sinyinza* (senior research officer) (Ministry of Fisheries, Zambia) *Please note our original Ministry of Fisheries collaborator, Mr. Taylor Banda, transferred to a different district, so Danny Sinyinza is now acting as our chief collaborator. Select the date when your project was started. Select the date when you expect the project to be completed. Project progress reports are meant to be shorter than final reports, but should provide enough information to allow the committee to assess the project's progress toward technical, humanitarian, education, sustainability efforts. They are expected to be written with the care and attention to detail that a published paper requires.
- Africa > Zambia (0.91)
- North America > United States > Kentucky (0.27)
- North America > United States > Oklahoma (0.25)
- Education > Educational Setting > Higher Education (0.91)
- Food & Agriculture > Fishing (0.84)
- Health, Safety, Environment & Sustainability > Sustainability/Social Responsibility > Sustainable development (0.49)
- Management > Strategic Planning and Management > Project management (0.48)
- Health, Safety, Environment & Sustainability > Sustainability/Social Responsibility > Social responsibility and development (0.44)
- Reservoir Description and Dynamics > Reservoir Characterization > Seismic processing and interpretation (0.41)
Provide a short summary of the project's goals and objectives. Improving access to potable water for partner schools or clinics through the repair of at least 4 brokendown wells and the establishment of at least 4 new hand pump equipped boreholes sited through the geophysical program. At least 8 Zambian students, 2 local professionals, as well as interested community members will be trained and mentored appropriately by our highly qualified multinational team. VWASHE committees will be established at each water point for infrastructure sustainability.
This project aims to improve the productivity of Lake Tanganyika's fishery in Zambia, by securing food resources and improving the health of thousands of villagers in the vicinity of the Nsumbu Tanganyika Conservation Project co-management area. The team is using high-resolution geophysics and limnogeological sampling (sediment cores and dredge samples), detailed echosounding, side-scan sonar, and CHIRP seismic reflection profiling, and providing the scientific foundation for defining coastal "no-catch" zones. These zones will be monitored and maintained by local villagers, allowing the health and productivity of fish stocks to recover. In the summer of 2022, the team visited Nsumbu National Park in Zambia for the first time. Prior to commencing surveying on the Nsumbu Tanganyika lake (above photo), the team held meetings with Zambia Ministry of Fisheries, Nsumbu National Park officials, and Frankfurt Zoological Society representatives to determine priority areas for benthic substrate mapping and sediment pollution analysis.
- Food & Agriculture > Fishing (0.87)
- Government > Regional Government > Africa Government > Zambia Government (0.60)
Toward the end of 2021, the GWB Committee selected four new projects for funding. One of the selected projects is in Zambia. Southern Province is one of Zambia's most water-scarce regions due to a short and erratic rain season with relatively low precipitation (757mm annually) as well as high evaporative losses over the dry season (Baumle et al., 2007). The province is primarily underlain by a crystalline basement complex that is frequently poorly weathered. In this setting, the principal source of clean water resources are aquifers associated with faults, broad fracture zones, and dikes.
The Estimation of Rockburst Hazard for Hard Rocks by the Test Results Below and Beyond the Compressive Strength
Kozyrev, A. A. (Mining Institute Kola Science Centre RAS) | Kuznetcov, N. N. (Mining Institute Kola Science Centre RAS) | Fedotova, Iu. V. (Mining Institute FEB RAS) | Shokov, A. N. (Saint-Petersburg Mining University)
Abstract At present the principal approach to the estimation of rock proneness to rockburst hazard consists in analyzing its complete stress-strain curves and defining the post-peak strain and energy parameters. The disadvantage of such method is the need to use the specialized stiff test machines. We propose a more simple method of rockburst hazard determination by analyzing the stress-strain curves at a pre-peak area. Our work is aimed at comparing the determination results of rockburst hazard by applying the method proposed and a method of the complete stress-strain curve analysis of hard rocks with using a stiff test machine. Based on the studies, we determined the strain and energy parameters of the hard rocks investigated and defined their rockburst category. The obtained data made it possible to conclude that the results of estimation of rockburst hazard at the pre-peak stage fully correspond to the estimation results by the complete stress-strain curves. 1 INTRODUCTION Deep mining of mineral deposits and mining in hard rock massifs with a predominant tectonic stresses face increasingly a problem of dynamic occurrences of rock pressure (Kozyrev et al. 1998, Kozyrev et al. 2014, Kabwe & Wang 2015, Cai 2016, Ptacek 2017). In some cases, such occurrences appear as rockbursts and mining-induced earthquakes with catastrophic consequences. In this regard, a preliminarily assessment of rockburst hazard for deposits mined should be performed. The main factors affecting dynamic failure in the rock mass are rock proneness to brittle failure and high stresses of the rock massifs (Turchaninov et al. 1977, Petukhov et al. 1997, Kozyrev et al. 1998). The study of these factors makes it possible to identify potentially hazardous parts of the rock mass. In the first case we conduct laboratory tests, the results of which allow determining the strain and energy parameters of rocks and their tendency to brittle failure. In the second case, it is necessary to carry out special in-situ measurements which allow establishing the values of the actual stresses in the rock mass.
- Europe > Russia (0.48)
- Africa > Zambia > Central Province > Kabwe (0.25)
- Geology > Geological Subdiscipline > Geomechanics (1.00)
- Geology > Structural Geology > Tectonics > Plate Tectonics > Earthquake (0.89)
- Geology > Mineral (0.89)
- Materials > Metals & Mining (0.89)
- Energy > Oil & Gas > Upstream (0.30)
Investigation of Rockburst in Deep Underground Mines, a Case Study of Mufulira Mine, Copperbelt, Zambia
Sinkala, P. (Hokkaido University) | Nishihara, M. (Hokkaido University) | Fujii, Y. (Hokkaido University) | Fukuda, D. (Hokkaido University) | Kodama, J. (Hokkaido University) | Chanda, E. (Mopani Copper Mines Plc)
ABSTRACT: Mufulira mine has been in operation since 1933. The mine is situated in the Copperbelt region of Zambia, which is predominantly rich in copper and cobalt mineralization. Since the beginning of 1970s, the mine has been recording incidents of rockbursts and applying various efforts to find mitigation measures for rockbursts. Recently, an M2.8 rockburst occurred in the mining drive at 1440 meter level underground on 16 January, 2018. In order to understand the mechanism of the rockburst, three major steps were taken. These were field geotechnical investigation, followed by uniaxial compression tests, and finally stress analysis. Under field investigations, scan-line mapping of joints indicated few major joint sets in the surrounding rock mass to the rockburst location. Stress analysis showed very high stresses in the chain pillars and low stress concentration at the rockburst site during initial stages of mining. But later, stress levels gradually increased with mining. It was therefore concluded that fracturing of the relatively intact rock mass around the mining drive under gradual stress increase by mining could be the cause of the rockburst.
- Africa > Zambia (0.61)
- North America > United States (0.46)
- Geology > Geological Subdiscipline > Geomechanics (1.00)
- Geology > Mineral (0.90)
- Geology > Rock Type > Sedimentary Rock (0.69)
- Materials > Metals & Mining (1.00)
- Energy > Oil & Gas > Upstream (1.00)
- Data Science & Engineering Analytics > Information Management and Systems (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization > Seismic processing and interpretation (0.96)
- Management (0.84)
- Reservoir Description and Dynamics > Reservoir Characterization > Reservoir geomechanics (0.70)