Post on 03-Jun-2018
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Figure 1
Figure 1Four diglines with no restricons
or bindings. Each digline is represented
by cuts outlined in one of four colors. The
cut labels show the digline and direcon
(order) in which the cut will be mined.
Each digline could start at its seed (rst
cut) at any me.
Restrictions & Bindings in the Digline Generator Scrip
The Digline Generator script (ip-DiglineGenerator.pyz) is run from the MineSight Interacve Planner and sequences
cuts for processing in the MineSight Schedule Opmizer (MSSO). Cuts on a bench are sequenced based on seeds
represenng the inial mining face or starng dig point, or lead lines represenng the direcon in which the mining
face will advance. The script then assigns each cut to a digline and computes a direcon (order) in which the cuts should
be mined.
Mulple diglines can be generated at dierent seed locaons or using dierent lead lines, both of which can be designated
either primary or secondary.
The Restriconsand Bindingsopons in the Digline Generator script provide addional control for scheduling cuts on
a bench. Restriconscontrol the order in which diglines are acvated, restricng the acvaon of secondary diglines
unl primary diglines are completed. Bindingsdelay acvaon of segments of concurrent diglines unl all of the bound
diglines complete a common segment. This ensures diglines move forward together rather than allowing one digline to
nish far before the others.
The digline and direcon, plus any restricons and bindings, are stored in an aribute that is then specied in MSSO (the
default aribute is mssoPrecedence). During MSSO processing, the aribute constrains the opmized schedule.
R E S T R I C T I ON S
If four diglines are generated on asingle bench with no restricons or
bindings, MSSO will look at all four and
assume that any of them are available
to mine (Figure 1). In this example,
mining may start with cut 1:1, 2:1, 3:1
or 4:1 (digline:direcon).
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Figure 2 Restricng
the start of the
secondary diglines
to the compleon of
their parent primary
diglines.
Figure 2
Figure 3
Figure 3 Opon to generate a
geometry object for visualizaon
of the restricons.
The opon to add restricons provides more control over the order in which the diglines are mined relave to each
other. On the Restriconstab, several opons are available. The example shows the eect of using the opon Restrict
Secondary Seeds to Primary forParent Primary Diglines, which delays the acvaon of a secondary digline unl its
parent primary digline is completed (Figure 2). Thus, secondary diglines 03 and 04 will not begin unl their parent
primary diglines (01 and 02, respecvely) are completed.
The results can be visualized in MS3D by generang an Output Restricon MSRon the Oponstab (Figure 3).
This will create a geometry object with a _restricted tag, containing aributed points located on each cut polygon
having a restricon. They are assigned material type Restricted and their display properes can be adjusted via the
Restricted material. When queried, these points will show an aributed name indicang the digline: direcon of the cut
restricng its acvaon (Figure 4). To show a label with the restricng cut, turn on the Node Labels for Element Name.
Figure 4 Restricng Secondary
Seeds to Primary example. The
circles (generated using the
Output Restricon MSR opon)
indicate cuts with restricons,
and the aributed name and
label indicate which cut must be
completed before the restricon
is lied. In this example, cut
2:36 must be completed before
beginning cut 4:1. Similarly, cut
1:32 must be completed before
beginning cut 3:1..
Figure 4
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Restricons can also be designated using polylines for even further control over the diglines. This provides a point-and-
click denion for restricon relaonships. These polylines start in the cut that is to be restricted, and then traverse
the restricon cuts with a node being placed in each. Simply digize a polyline that begins in a cut to be restricted. The
next point should be in the cut that restricts the rst cut, and so on. Each node represents a restricon of a cut by the
cut with the subsequent node. Restricon polylines are then imported into the Digline Generator script by usingImport
Restriconson the Oponstab (Figure 5).
Figure 5
B I ND I N G S
Bindings work separately from restricons and act to restrict the advancement of a single digline ahead of other
concurrent diglines. The purpose is to mine along the diglines in such a way that they progress proporonally to one
another. The number of Binding Segments is specied on theRestricons tab (Figure 6).
Figure 6On theRestricons tab, two binding
segments are created for cuts in each primary
digline.
Figure 6
A binding segment is a fraconal poron of a complete digline; the greater the number of binding segments, the ghter
the binding. If the number of binding segments is set to one, no fraconal segments are created and no bindings are
made. Bindings can be specied for all types of diglines, including primary and secondary lead lines and primary and
secondary cuts. In this example, two bindings are created for only the primary cuts.
Again viewing the restricons object from Output Restricon MSRopon, Figure 7 shows the results of binding the
cuts on the primary diglines with two binding segments. This conguraon will divide each primary digline roughly into
halves, and restrict the acvaon of the second halves unl all of the rst halves have been completed. Thus, in Figure
7, cut 1:16 in the rst primary digline (01) and cut 2:18 in the second primary digline (02) cannot begin unl the rst
segments in both diglines (cuts 1:1 1:15 and cuts 2:1 2:17) are nished. Increasing the number of binding segments
will increase the number of groups used in this process, ghtening the grouping of cuts when mined.
Figure 5Imporng restricng polylines
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SOFTWARE SOLUTIONS FROM MINTEC, INC.
CONC LUS I ON
The use of Restricons and Bindings in the Digline Generator script provides a great deal of control over cut sequencing
The opon to adjust restricon geometry using MS3D polylines makes the tool even more intuive so with just a few
simple inputs, the mining plan on a bench can be streamlined and customized. The sequencing is automacally passed
to MSSO, increasing the accuracy of the resulng schedule.
Figure 7 The eect of binding primary
diglines using two segments. Note how
the progression of both the primary
diglines are bound together. Digline 01
cannot connue with cut 1:16 unl 2:17 isnished, and Digline 02 cannot connue
with cut 2:18 unl 1:15 is nished. Figure 7
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