MBEYA UNIVERSITY OF SCIENCE AND TECHNOLOGY (MUST)
INSTITUTE OF SCIENCE AND TECHNOLOGY
DEPARTMENT OF GEOSCIENCE AND MINING TECHNOLOGY
FIELD PRACTICAL TRAINING REPORT
NEW LUIKA GOLD MINE, SONGWE.
STUDENT’S NAME: BENJAMIN SIMEON WARYUBA
REGISTRATION NUMBER: 19101023110043
EXAMINATION NUMBER: UE/DME/20/8854
COURSE: ORDINARY DIPLOMA IN MINING ENGINEERIN
ACADEMIC YEAR: 2020/2021
LEVEL: NTA 05
Qn;
Explain the wall/rock supporting mechanism applied at you IPT location by focusing on the
following areas (tools used, nature of the enclosing rock, how effective and reliability the support
system used are)
The following is how in my IPT site rock support is conducted.
After every excavation or a cut has been made primary support is installed, it involves the use
of wire mesh and split set rock bolts, the below are the specification of installation.
A. WIRE MESH
It is specifically installed to prevent the fall of smaller rocks majorly caused by
blasting. The wire mesh used at my IPT site is (2400 by 3000) mm.
B. SPLIT SET ROCK BOLTS
The split set used are mechanically grouted, are used to help the discontinuity of a
rock become a continuity, have got the following specification.
 Split set with the dimensions of (39 by 900) mm is used for joining mesh
intersections.
 Split set with the dimensions of (49 by 1800) mm is used for supporting the
walls.
 Split set with the dimensions of (49 by 2400) mm is used for back supporting.
The diameter of 46 mm is used for split set installation.
In very wide areas cable bolts are applied, they are very reliable, they act as needle that sew
the rock mass, the cable bolts used at my IPT site are 6 m and 8 m, the hole diameter used is
64 mm.
Picture of split set, wire mesh, and cable bolts installed.
BACKFILL
Are used to fill the void caused by exaction made, helps to prevent confinement though it
should be noted that it has weaker mechanical properties compared to the rock mass
excavated this is so because it is made of soft materials, hence monitoring is required. At my
IPT site monitoring is conducted using MPBX.
The following are the materials used to obtain back fill;
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Aggregate of -50 mm, helps in increasing strength of the back fill.
Cement is used for binding
Tailings are used to minimize the amount of cement used this helps to minimize costs
encountered.
Water is used for mixing of the material.
The backfill material are dimensioned depending on the need, it requires a minimum of 28
days to heal and harden.
SHOT CRETE
It is made of concrete, cement, tailings, and water. Additives such as super plasticizer may be
used, the aggregate used is -20 mm.it is used to add a new layer to very weak rocks also it is
used to hold together small openings or fractures.