Assessment of factors that lower production in longhole stoping mining method practiced at Tiira gold mine.

Abstract

This was conducted in order to establish the factors that lower production evaluate the identified factors and provide. suggestions so as to increase, production of the mine it includes overcoming the excessive oversize generated in the mining parameters. From literature review, the parameters of drilling and blasting that determine the degree of fragmentation in underground blasting were established. The factors were identified using open and close ended questionnaires and interviews and the factors which were worked on, were selected according to their frequency in the questionnaires The questionnaires were distributed. to engineers, operators and managers with the operators taking the most part in questions The identified factors were drilling parameters, blasting, loading and haulage, Availability and utilization of machines Unplanned maintenance, Mine Schedule and Scheduled time, operators’ skills, lack of motivation, ventilation backfilling, rock supporting. And the ones worked on in this project are Drilling parameters, Blasting, Loading and haulage Availability and utilization of machines, unplanned maintenance, and Mine Schedule and Scheduled time Algorithm for the total. analysis and generation of the parameters' most fit to minimize the generation excessive oversize on underground mine were formulated: data, experiment and measurement data collection was made in respect of the mining and geological conditions and the actual parameters of drilling and blasting at the Tiira data analysis was based on the specially devised wilt be made and the design parameters generated and compared with the actual to establish the reviews of the drilling and blasting parameters which have to be made in order to overcome the problem of excessive generation of oversizes in the mine. Also ranking of the factors according to their frequency was done. and the mast critical factors were unplanned maintenance availability and utilization of equipment. and drilling and blasting. The report is made of two parts, the first part is introduction part and the second part is main part. The introduction part covers the background information of the company, statement of the problem and the objectives of this project. The main part includes descriptions of the methodology followed and the literature review carried out in order to fulfil the objectives set of the project, Data collected is current design and actual from the field to see if the design is matching with the designed. Also the current practice at the field, observation was done to see if they follow the required procedures of the drilling and blasting. The findings show that, the drilling and blasting. parameters is not compatible with mining and also the critical factors contribute a lot to low production, Then, the possible solution is to recommend appropriate maintenance practices, benchmarking practices and also proper supervision and also supervision and is provided this report.