Design Assumption on Geological Exploration of a Manganese Ore Deposit in South Africa
Depth of a manganese ore deposit in South Africa is 400~1500m,thicknesses of two paralleled ore bodies are 3.59m and 5.90m respectively,an ore deposit with area of 19km2 located in the east is selected by a resource company of South Africa for exploration design,but density of design drilling grid can not meet the objective and demands,in drilling design,depth of drilling is too deep in the south-west and too shallow in the north-west,ore prospecting and mining are separate.According to requirement of mining,scope of ore prospecting is enlarged and density of prospecting grid is increased,amount of resource exploration of 11000kt is added,which can meet the requirement of financing and feasibility study.Because drilling hole is too deep,in order to save the investment,shorten the time of mine construction,it is suggested that exploration silo and tunnel level are used as prospecting access and drilling hole or raise and ground well are used for increasing prospecting,which can meet the requirement of mine development.