David .M. Kahumbi Email and Phone Number

Roles and Responsibilities;-Supervising all geological,geotechnical and hydrogeology drilling activities.-3D geological modelling.-Mineral resources and reserve estimations.-QAQC for assay data.-Geological logging for AC,RC chips and DD cores.-Geotechnical logging,data validation and Calculation-Plotting Section and section interpretation.-Geological mapping and structural mapping.-Prepare geological map by QGIS.-Oversee the development and management of… Show more Roles and Responsibilities;-Supervising all geological,geotechnical and hydrogeology drilling activities.-3D geological modelling.-Mineral resources and reserve estimations.-QAQC for assay data.-Geological logging for AC,RC chips and DD cores.-Geotechnical logging,data validation and Calculation-Plotting Section and section interpretation.-Geological mapping and structural mapping.-Prepare geological map by QGIS.-Oversee the development and management of exploration programs, including budget preparation, report writing, general logistics, contractor supervision and HSE. -to train, motivate and develop geological and technical staff(including graduate geologists,tecnhicians), and demonstrate a strong ability for general problem solving in challenging environments.-Supervising Geological sampling and sample dispatch.-Planning drilling and soil sampling.-Preparing Geological and geotechnical weekly and monthly report. Show less

Projects; Transmission lines,Hydroelectric Power Plant and Construction Project.-Execute detailed phases of Geological, geotechnical and geophysical investigations, testing programs, study and design of transmission lines and high voltage substation and other technical work. Roles includes:--Geological mapping-Diamond Drill core logging and sampling.-Geotechnical drilling and logging.-Soil sampling and logging.-Prepare Sample dispatch. -Borehole drilling… Show more Projects; Transmission lines,Hydroelectric Power Plant and Construction Project.-Execute detailed phases of Geological, geotechnical and geophysical investigations, testing programs, study and design of transmission lines and high voltage substation and other technical work. Roles includes:--Geological mapping-Diamond Drill core logging and sampling.-Geotechnical drilling and logging.-Soil sampling and logging.-Prepare Sample dispatch. -Borehole drilling controlling and supervision-Soil Resistivity survey by using HT- MICROTEST instrument.-River water flow measurements.-Lugeon test and Lefranc test.-SPT Test and Van Test.-Falling head and constant head test and Parker control.-Grouting, shortcrete,control concrete ratios.-Conduct Topographic survey.- Analyse geological conditions like permeability, rock mass rating (RMR), rock classes interpretation, and nature of rocks. -Estimation of engineering behaviour of the rock mass through geotechnical logging including RQD and core recovery.-Supervising Laboratory Test includes:- -Petrographic and mineralogical test. -Brazilian Test. -Grain size distribution. -One dimension consolidation test. -Triaxial test. -Uniaxial compressive strength(UCS). -Specific Gravity. -Direct shear test. -Rapid Test(Mortar Bar) and Alkali Reactivity ASTM C1260. -Bulk Density determination. -Coarse aggregate samples. -Water test.Some of key contribution included:➢ Reviewed construction design proposals and approved geotechnical aspects, as well as provided direction to technical team in field inspection activities.➢ Organised safety meeting to ensure project work compliance with safety and contractual requirement.➢ Carried-out geotechnical analysis and study to assess construction site condition.➢ Collected and tested core, soil, water samples from the project's intended site, using bores and test pits Show less

Roles and responsibilities;--Advise and assist mine operations on ground control methods to ensure optimum utilization of theavailable ore reserves and human resources engaged in ground control activities.-Use geotechnical mapping and logging to classify rock mass and apply the data on stope design andmine layouts.-Use structural stability methods, empirical assessment and numerical modelling to arrive at ultimatesupport systems and determine optimum pillar sizes and… Show more Roles and responsibilities;--Advise and assist mine operations on ground control methods to ensure optimum utilization of theavailable ore reserves and human resources engaged in ground control activities.-Use geotechnical mapping and logging to classify rock mass and apply the data on stope design andmine layouts.-Use structural stability methods, empirical assessment and numerical modelling to arrive at ultimatesupport systems and determine optimum pillar sizes and stoping sequences to ensure stability ofunderground structures.-Provision of geotechnical information for mine planning and design requirements to ensure compliancewith the site Ground Control Management Plan and related standards and procedures.-Perform numerical modeling for mine workings and interpretation thereof.-Update geotechnical model and domains and generate 3D mine CAD/ Datamine geotechnical joint datain stoping areas.-Inspect life of mine infrastructure (ramps, shafts and workshops etc.).-Compile Weekly Geotechnical reports on geotechnical data, analyses, risk assessment and inspection.-Weekly Database Management Quality Control - QA/QC of geotechnical logging and mapping data and electronic filing thereof.-Regularly update the Ground Control Management Plan (GCMP) so as to improve the quality of serviceoffered to the mining department.-Design and monitoring of ground support, backfill systems, and control instrumentation.-Provide Geotechnical input for new projects (new mining areas, changes in current plan etc.).-Provide geotechnical input into mine planning and designs, operation and optimization of open pits,underground and waste disposal; and ensuring that all works are implemented in accordance with theGround Control Management Plan and monitoring procedures.-Carry out rock stability assessment of open pit, underground workings and infrastructure. e.t.c Show less

Project:Awdal,Alihaayd and dabidalaac Project: Gemstones, Copper, Galena, & Cement.I analysed and interpreted geological data using computer software. Roles includes:--Geological mapping-Locate mineral ore deposits-Prepared geological maps-Prepare Geological reports-Plan amd.design diamond,RC drilling work-Geotechnical logging and structures interpretations-Train junior geologists amd geological technicians-Assure adherence to safety and company policy… Show more Project:Awdal,Alihaayd and dabidalaac Project: Gemstones, Copper, Galena, & Cement.I analysed and interpreted geological data using computer software. Roles includes:--Geological mapping-Locate mineral ore deposits-Prepared geological maps-Prepare Geological reports-Plan amd.design diamond,RC drilling work-Geotechnical logging and structures interpretations-Train junior geologists amd geological technicians-Assure adherence to safety and company policy procedures. -I conducted pitting and trenching planning-Soil sampling and Logging-Prepare and control budget for operation and exploration strategy-Interpretimg and modelled geotechnical data and formulated geotechnical controls for slope design-Control blast design, and water management.Some of key contribution included:➢ Provided assessments and advised to minimum risks, cut costs, and reduce timeframes of project.➢ Ensured accuracy of documents by reviewing the geological data on an on-going basis.➢ Improved project progress and performance through execution of continuous improvement initiatives. Show less

Project:Bulyanhulu underground gold mine-TanzaniaRoles and responsibilities includes:--Underground Geological mapping(ore and waste headings) and sampling.-Alimak raise sampling.-QAQC and grade control.-Rompad supervision.-Map digitization.-Preparing Daily Morning report.-Preparing CMS.-Long hole production and supervision-Compilation of data collected.-Track production sampling and material handling compliance and reporting.- Geological… Show more Project:Bulyanhulu underground gold mine-TanzaniaRoles and responsibilities includes:--Underground Geological mapping(ore and waste headings) and sampling.-Alimak raise sampling.-QAQC and grade control.-Rompad supervision.-Map digitization.-Preparing Daily Morning report.-Preparing CMS.-Long hole production and supervision-Compilation of data collected.-Track production sampling and material handling compliance and reporting.- Geological analysis and recommendations and status updates for ongoing productions. -Collaborate with mining crews, mine supervision, and drilling crews to maintain a safe working environment.- I developed quality ore headings through coordination with engineering and mining operations.- I conducted systematic sampling of Alimak raises and grade follow up for long hole and ore development faces.-I organised and complied production, development, and underground exploration data and results.-I monitored muck sample collection.-Daily timely submission of samples to the laboratory.Some of key contribution included:➢ Developed Stockpile management procedures to reduce storm water pollution from stockpiles of materials.➢ Identified and swiftly resolved risks related to geological anomalies.➢ Improved personal capabilities of graduate geologist, technicians, and samplers on standards for underground sampling and grade control practices.➢ Advised underground mining engineers on designing with respect to structural features.SOFTWARE USED:--Datamine-Acquire database Show less

Project:Ntaka/Chilalo project(Nickel,copper,Gold and graphite) Job Descriptions;--Diamond drilling and Rc chips Logging and sampling.-Geological mapping,-Prepare geological report.-Gryo survey to insure no deviation of ongoing drilled holes.-Line cutting,-Trenching,-Soil logging and sampling,-MetarLugical logging and sampling.-Sample dispatch preparation.-3D-modelling and map digitization,-Geophysical survey e.g gravity survey,IP survey and… Show more Project:Ntaka/Chilalo project(Nickel,copper,Gold and graphite) Job Descriptions;--Diamond drilling and Rc chips Logging and sampling.-Geological mapping,-Prepare geological report.-Gryo survey to insure no deviation of ongoing drilled holes.-Line cutting,-Trenching,-Soil logging and sampling,-MetarLugical logging and sampling.-Sample dispatch preparation.-3D-modelling and map digitization,-Geophysical survey e.g gravity survey,IP survey and Magnetic survey,-SOFTWARE;- -Iam competent in using different software e.g -GEMCOM GEMS, -MICROMINE, -MAPINFO, -LEAP FROG MINING, -Iogas explatory data for geochem sampling,DATABASE -Acquire database. -X-Logger Show less

Project:Nyanzaga Gold projectJob Descriptions-Geological logging and sampling(Chips and DD core)-Supervise auger drilling.-Soil sampling and mapping-Geotechnical logging and sampling.-Preparing sample dispatch to laboratory.-Geological mapping and map preparation-Rig supervision(RC and DD rigs)-Prepare Geological report.-Supervise safety in work environment.