Sunday, November 15, 2009

Mine Design

Is an activity to plan and design a mine based on a feasibility study and final results of mineral deposits exploration. According to HL. Hartman in the introductory mining engineering in 1987, there are three factors at the mine design open pit planning, namely:

1. Nature and geological factors: hydrology conditions, sediment type seeds, metallurgy topography and character of the ore and rock

2. Economic factors: the level of ore deposits, the amount of ore deposits, SR, COG, operating costs, investment costs, benefits desired, the average production and market conditions

3. Technical factors: equipment, slope, pit, high-level, grade roads, boundaries and limits pit KP

Flow diagram Mine Planning:





DESIGN AND PLANNING STAGES OF MINE

1. Validation data (geology, topography, Total Data)
2. Geological model à (Geological Resources, Forms Reserves, Quality, etc..)
3. Cut of Grade / Optimum Pit Limit
4. Determination of mining methods
5. Making mine & Design Layout
6. Calculation Block Backup
7. Creation Production Schedule
8. Selection Tools and equipment type "Suitable"
9. Determination Order (sequence) Mine
10. Determination of Drainage System
11. Environmental Analysis and Rehabilitation Plan

GEOLOGICAL DATA AND MODEL

1. Geological Data

a. Field Topography
b. Drilling Data
c. Structure Geology

2. Geological Model

a. Geological cross section (Section)
b. Structure map, thickness and quality (2 Dimension)
c. Quality Model (3 Dimension)

3. Geo technical Data

a. Density of rocks (Wet And Dry)
b. Angle Slide In
c. Cohesion
d. Geology Layer Structure (example: Joint)
4. Slope Stability

Optimization:

a. High Bench
b. Slope Slope: Overall and Individual Slope Slope
c. Safety Factor
d. Geo technical data

5. Model Hydrology & Geo hydrology

a. Rainfall (water surface)
b. Permeability rocks
d. Catchment Area
e. Ground water (ground water)

MINING LIMITS DETERMINATION

a. Optimum stripping ratio
b. Limit mine
c. Limit waste dump
d. Other Limits: rivers, roads, etc.

SELECTION TOOLS & MINING METHOD

1. Parameter selection tool:

a. Soil conditions and assistance
b. Production target
c. Material characteristics
d. Thickness and slope of the coal / ore
e. Distance transport
f. Topography
g. Weather

2. Parameters mining methods:

a. Dimensional work location
b. Sequence mining (Mine sequencing)
c. Production Plan (Production scheduling)
d. The width of the street / Ramp
e. Grade road
f. Initial location of mining
g. Management disposal (In and Out Pit dumping system)

LAYOUT & DESIGN MINE

a. Design pit
b. Design ramp
c. Design disposal
d. Design road
e. Drainage
f. Etc.

MINE PLANNING

1. Production:
a. Production target
b. Productivity
c. Number of tools

2. Hours:
a. Work calendar
b. Shift work
c. Total hours of work a year

MINE DRAINAGE

a. Bench and Drainage Sump
b. Selection pump
c. Processing flow of water
d. Mud disposal

ENVIRONMENTAL IMPACT AND REHABILITATION

a. Top soil stockpiling
b. Rehabilitation Plan
c. Waste water handling

Objectives to be achieved in the mine planning are:

1. Mine the ore body so that the unity of production costs are minimal heavy metals

2. Seeking good run mining operations (wide road and the entrance)

3. Strive always available outcrop ore to prevent exploration data errors

4. Always ready to change the strip without the deployment of equipment, personnel, production schedule

5. Running logical operations since the early schedule (training personnel, equipment, logistics, etc.). This is to minimize the risk of delays in a positive cash flow position.

6. Maximizing the pit slope designs that minimize the possibility of kelongsoran

7. Strive to achieve the economic benefits of natural production conditions and seek alternative COG


Notes from Various Sources Mine Design Mine