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September 23, 2008 :
Reclamation: Do It Right the First Time with Carlson Natural Regrade
Carlson Natural Regrade gives mining companies – actually, anyone faced with disturbed lands – an affordable and natural way to achieve sustainability when doing reclamation. Those in the future will thank you. For Detailed Information. |
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September 22, 2008 :
New From Carlson Software: Carlson Mine Financials
Get the total picture to improve mine efficiency and lower costs with Carlson Mine Financials from Carlson Software. For Detailed Information. |
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September 22, 2008 :
Winners of Carlson Mine Design Competition Announced
Seniors (all now graduated) from Virginia Tech, the University of Nevada-Reno, and the University of Kentucky took the top three places in the 11th Annual Carlson Software National Senior Mine Design Competition. For Detailed Information. |
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September 2, 2008 :
It's time to trade up to the Carlson Surveyor+
Carlson Software is making it easier for surveyors to get the speed they want with the reliability they need by offering a trade-in program to help introduce their all new Carlson Surveyor+ data collector. For Detailed Information. |
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July 17 , 2008 :
Carlson Software Introduces All-New Simplicity 'Sight' Survey 2009
Get well orchestrated harmony of COGO and CAD with this new release from Simplicty/Carlson, perfect for DOTs and for firms working with DOTs. For Detailed Information. |
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Surface
Deformation Prediction System
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SDPS
version 5.x constitutes
the latest update
of SDPS software,
developed specifically
for the Microsoft
Windows® environment
(SDPS for Windows).
In this respect, all
programs fully utilize
the central management
of computer resources
(i.e. memory, use
of the clipboard,
peripherals, etc.)
provided by the Microsoft
Windows®. All
SDPS version 5.x programs
are developed in the
Visual Basic 6.0 programming
language (professional
edition).
Version 5.x of the
Surface Deformation
Prediction System
(SDPS) is designed
to provide an integrated
approach to the following
problems:. |
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Hardware,
Operating
System,
and Configuration Requirements |
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SDPS package can be
installed on any computer
running Windows 95,
98, NT4, 2000, XP. The
minimum configuration
for installing and
running SDPS is the
following: |
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Pentium
based
unit or better |
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Windows
95 or better (98, NT4, 2000, XP) |
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SVGA
card
with
256
colors
and
1024x768
resolution
or
better |
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150 MB
free
disk
space or more |
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Any
printer
supported
by
Windows |
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Input
Parameters
for
Ground Deformation Calculations |
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| In
order to calculate
surface deformations
above an undermined
area, three distinct
entities must be established: |
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Location
and
geometry
of
the
mined
area
(mine
plan) |
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Location
of
the
surface
points
where
deformations
will
be
calculated
(prediction
points) |
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Appropriate
subsidence
parameters
developed
from
field
observations |
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| Ground
Deformation
Prediction
Methods |
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The SDPS package includes
two separate formulations
for calculating ground
deformations: |
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Profile
function
method. |
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Influence
function
method. |
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The
profile
function
method
of
ground
deformation
prediction
is
the
easiest
to
apply,
since
it
requires
minimum
input,
i.e.
panel
width,
overburden
depth,
seam
thickness,
and
percent
hardrock
in
the
overburden.
The
location
of
the
prediction
points
is
automatically
established
on
the
transverse
axis
of
the
panel,
extending
from
the
point
of
maximum
subsidence
(i.e.
the
panel
center
line)
to
the
zero
subsidence
limit.
The
empirical
parameters
required
are
already
built
into
the
profile
function
equation. |
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For
the
influence
function
method,
input
requirements
are
more
complex
and
generally
the
following
steps
are
required
for
a
given
case
study: |
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Establish
the
mine
plan,
describing
the
layout
of
the
excavation,
which
can
include
more
than
one
extraction
panel
(or
parcel),
each
with
a
different
geometry.
The
effect
of
the
inflection
point
should
be
taken
into
account
by
modifying
the
geometry
of
the
excavation
parcel. |
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Establish
the
location
of
the
prediction
points,
i.e.
the
coordinates
and
elevation
of
the
surface
points
where
prediction
of
deformation
indices
is
requested.
The
points
can
be
either
scattered
or
defined
by
a
grid. |
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Develop
the
empirical
parameters
pertaining
to
each
case
study.
The
average
parameters
established
for
eastern
U.S.
coalfields
may
be
used
if
site-specific
parameters
are
not
available.
The
development
of
site-specific
parameters
is
recommended,
however,
for
more
representative
calculations. |
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As
of
release
5.1
the
influence
function
module
can
import
mineplans
and
prediction
points
directly
from
AutoCAD
DWG
files.
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As
of
release
5.2
the
program
will
feature
the
calculation
and
presentation
of
dynamic
ground
deformation
indices. |
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As of release 5.5, the SDPS the influence function module supports AutoCAD
2000/2002 and AutoCAD 2004/2005/2006. |
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| Calibration,
regional
adaptability |
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The mining parameters
required for the application
of subsidence prediction
techniques can be
obtained from mine
maps, structure elevation
maps, surface contour
maps and borehole
information. From
the mine maps and
from the elevation
maps, the geometry
of each panel and
the corresponding
overburden depth can
be determined. From
the borehole logs,
the percent hardrock
in the overburden
can be determined.
Additionally, the
methods require the
determination of a
number of empirical
subsidence parameters,
which are considered
site-specific. These
parameters include: |
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Maximum
subsidence
factor
for
the
site
(Smax). |
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Distance
of
the
inflection
point
from
the
rib
(d) |
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Horizontal
strain
coefficient
(Bs) |
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A
number
of
relationships
were
established
based
on
the
data
collected
from
case
studies
and
these
relationships
were
used
for
the
regional
application
of
the
prediction
methods.
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These
relationships
include: |
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