NORDIC SUPPLIER FOCUS_proof 27/04/2016 10:21 Page 4
NORDIC SUPPLIER FOCUS
tunnelling project management software,
providing rock mass information and a view
inside the drilled rock. Its unique features
improve the overall drifting process in terms of
efficiency and quality.
The launch of geoSURE provides accurate
geological information for underground operations.
It is an important tool for the assessment of rock
reinforcement or injection requirements.
Additionally it serves as an assisting tool for
charging and blasting control as well as a
complementary tool for geological mapping.
The benefits of geoSURE are perhaps best
demonstrated in the way it supports the
assessment of the need for rock reinforcement or
injection. Once the online data produced by each
drilled hole is analysed and further visualised
using the iSURE tunnelling project management
system, a view inside the rock is formed
providing geologically meaningful information.
This may then be used to support the formation
of bolting and injection plans as well as backing
up the charging and blasting procedures.
The present approach for geological
mapping is based on visual sighting and time
consuming laboratory measurements; the
development of geoSURE now enables the use
of a handy tool which speeds up and enhances
this process.
The geoSURE system enables the drill rig to
act as the analyser as all information is provided
in real time on the drilling rig itself. There is no
need for any third party devices, add on sensors
or separate data transfers, as the analysis is fully
integrated into the drill rig. This means that
geoSURE takes full use of the drilling information
thus providing accurate and repeatable results.
Being a built-in solution, Sandvik says “geoSURE
is seamlessly integrated to the control system of
the drill rig thereby ensuring ease and speed of
use, and also allowing the quality, testing and
support functions synonymous with Sandvik
service.”
The real time on-board analysis includes
features such as fracture, rock strength and water
indication. The extended analysis of the data
allows the evaluation of the rock strength class,
rock quality class and rock quality number. These
features can then be further visualised using
iSURE. The 2D planar view provides an overall
outlook of the tunnel section, including 2D
interpolation, side view, top view and unrolled
view. For more detailed inspection, the 3D
structural view of the tunnel section can be used.
This features 3D interpolations, plane
intersections and isosurfaces and curves. The
iSURE system also provides the former 3D view
and one hole MWD diagram with the new
geoSURE variables.
Hole 1 was 140 m long at an
inclination of 61o. Deviation with
Wassara DTH drilling was 1.1% in
the formation, a mix of granite,
quartz and leptite with
unconfined compressive strength
of 160-270 MPa. Hole 2 was 130
m long, inclined at 62o and the
deviation was just 1.5%. In both
cases, the rate of penetration was
0.6 m/min