Choose the sides of the ramp as in the following diagram: A prompting message will appear asking you to “Select the first ramp point” then “Select the second ramp point”.From the Mine Design menu choose Pit design, New ramp.From the Mine Design menu choose Pit design, Set slope gradient.From the Mine Design menu choose Pit design, Select slope method.This string will form the base of the pit you will create. From the Navigator click and drag the file pit1.str into the viewport to open it.Build the pit with 10m bench heights and 5m bench widths (berm widths), at a pit wall slope of 50 ° until it reaches topography ( topo1.str). Construct a pit from the base up to topography.Calculate the cut volume of your designed pit.Generate a final, mined surface using your pit and the topography ( topo1.str).Create a surface (DTM) of your pit and generate a final surface using it and the topography ( topo1.str).Build the pit with 10m bench heights and 5m bench widths (berm widths), at a pit wall slope of 50° until it reaches topography (topo1.str). The perimeter of the pit then is reformed to accommodate the requirements of the all cut ramp. Instead, they follow a pre-defined centreline. All Cut Ramps: All Cut ramps do not follow the wall or perimeter of the pit. Switchbacks are used to reverse a circular ramp’s direction.ġ. Circular ramps may be edited, deleted, added at any time during the pit design. Their sense (clockwise or anti-clockwise) depends on how the pit is designed either from the bottom upwards or from the top downwards. Circular Ramps: Circular ramps, either clockwise or anti-clockwise follow the perimeter or wall of the pit. Once the ramp is defined it will automatically be designed as the pit design progresses. Exits from the ramps onto the benches may be included as part of the ramp design. Ramps are defined by points along their edge and by a gradient.
When design a pit, either from the top down or bottom up, you may choose to include a ramp. The widths of benches are obtained by expanding crests (or contracting toes) by a certain berm width. The resulting segment will conform to elevations determined by the nominated DTM surface. Nominate a DTM to which a toe will be elevated or a crest will be lowered. The resulting segment will reside entirely on the same nominated elevation. Nominate a single elevation to which a toe will be elevated or a crest will be lowered. The resulting segment will be elevated or lowered by the nominated bench height. Nominate a single height by which to elevate a toe or lower a crest. This is used where different areas of the pit property require different pit wall slopes according to geotechnical constraints.īenches may be constructed in one of three ways: In the point’s description field (D1) is the value of the pit wall slope of that particular zone or area. A ‘slope string’ file consists of clockwise, closed segments defining the areas of different pit wall slopes. This is used where different parts of the pit perimeter require different pit wall slopes according to geotechnical constraints.Įach point in the segment to be expanded is done so at a slope angle specified by where the point lies in relation to a ‘slope string’ file. This is used for simple pit designs.Įach point in the segment to be expanded is done so at a slope angle specified by a value in the point’s description field (D1). The pit wall slope is defined by the user in any of three different ways: These angles are the pit wall slope measured from one toe to the next crest (upwards) or one crest to the next toe (downwards). When expanding (or contracting) closed strings to construct benches, they are done so on a point-by-point basis at specified angles. Which way a design is started depends on what data is available, the specific data involved, and the requirements of the project. That is, pit design may be started on surface and designed downward to a base, or from a base and upward to topography. Benches are constructed by either expanding or contracting closed strings, either upwards or downwards depending on where the design is started, by a certain bench height. The Pit Design module uses normal String data to build a pit by progressively expanding or contracting toes and crests.
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