1. 24 MARCH - 16 APRIL (2010)
(HLANGANANI SHAFT)

2.  OVERVIEW
 PERFORMANCE FIGURES
 PERCENTAGE USAGE OF THE DRILL RIGS
(CHARTS)
 OVERALL ANALYSIS
 RECOMMENDATIONS

3. DATE RIG TYPE
W/ PLACE
RIG No.
PERFORMANCE FIGURES JUMPER
USED
Drilling
(Start &
End time)
24/03/2010 Sandvik
50/26
LDR 4
Ave drilling ( 3min 22sec)
Ave positioning ( 46sec)
Penetration rate (67sec/m)
3m 07:31am-
13:30pm
25/03/2010 Sandvik
50/26
LDR 6
Ave drilling ( 2min 53sec)
& ( 3min 23sec)
Ave positioning ( 37sec)
Penetration rate (72sec/m)
Penetration rate ( 68sec/m)
2.4m (support)
3m (End)
2.4m
3m
08:15am-
14:20pm
26/03/2010 Sandvik
46/west
LDR 9
Ave drilling ( 2min 58sec)
Ave positioning ( 51sec)
Penetration rate ( 59 sec/m)
3m 08:27am-
13:13pm
29/03/2010 HPE
46/west
No. 5
Ave drilling ( LB 5min 30sec) (RB 4min 37sec)
Ave positioning ( LB 53sec) (RB 55sec)
Penetration rate ( LB 137sec/m) (RB 115sec/m)
2.4m (4: 55sec)
(54sec)
(126sec/m)
08:19am-
11:25pm
30/03/2010 HPE
46/west
No. 5
Ave drilling ( LB 4min 5sec) (RB 4min 23sec)
Ave positioning ( LB 33sec) (RB 60sec)
Penetration rate ( LB 102 sec/m) (RB 110sec/m)
2.4m (4:14sec)
(47sec)
(106sec)
08:14am-
11:17pm
06/04/2010 Sandvik
50/20
LDR4
Ave drilling ( 2min)
Ave positioning ( 35sec)
Penetration rate ( 50sec/m)
2.4m 06:26am-
11:36am
07/04/2010 Sandvik
LDR4
50/20
Ave drilling ( 2min 3sec)
Ave positioning ( 34sec)
Penetration rate ( 51sec/m)
2.4m 06:54am-
10:45am
09/04/2010 Sandvik
LDR 9
46/west
Ave drilling (2min 40sec)
Ave positioning (36sec)
Penetration rate (53sec/m)
3m 08:56am-
13:02pm
12/04/2010 Sandvik
LDR 9
46/west
Ave drilling ( 3min 6sec)
Ave positioning ( 37 sec)
Penetration rate ( 62sec/m)
3m 09:36am-
13:27pm
14/04/2010 Sandvik
LDR 4
50/20
Ave drilling ( 2min 25sec)
Ave positioning ( 35 sec)
Penetration rate ( 48sec/m)
3m 08:22am-
13:19pm
16/04/2010 Sandvik
LDR 9
46/west
Ave drilling ( 3min 4sec)
Ave positioning ( 46sec)
Penetration rate ( 61sec/m)
3m 07:50am-
12:05pm

4. 1.35%
17.26%
57.66%
0.22%
12.38%
3.64%
4.62%
1.68%
1.19%
Sandvik (24/03),(50/20)
Breakdown 00:06:04
Delay 01:17:43
Drilling 04:19:36
Machine set up
00:01:00
Positioning 00:55:43
Pre-start check
00:16:24
Safety talk 00:20:49
Travelling to face
00:07:33
4.24%
0.23%
24.27%
50.14%
8.36%
0.90%
0.82% 7.05%
0.40%
3.59%
Sandvik (25/03),(50/26)
breakdown 00:21:39
change bit 00:01:09
Delay 02:03:53
Drilling 04:15:54
Positioning 00:42:40
preparation at face
00:04:35
Pre-start check 00:04:12
Safety talk 00:36:00
0.63%
12.76%
56.13%
4.93%
14.28%
8.05%
0.53% 2.19% 0.51%
Sandvik (26/03),(46west)
Breakdown 00:02:23
Delay 00:48:05
Drilling 03:31:28
Machine set up 00:18:34
Positioning 00:53:47
Pre-start check
00:30:19
safety talk 00:01:59
23.55%
8.63%
45.47%
2.51%
12.87%
6.13% 0.83%
Sandvik (06/04)(50/20)
Braekdown
Delay
Drilling
Machine set up
Positioning
Travel to face
Travel to workshop

5. 23.55%
8.63%
45.47%
2.51%
12.87%
6.13% 0.83%
Sandvik (06/04)(50/20)
Braekdown
Delay
Drilling
Machine set up
Positioning
Travel to face
Travel to workshop
2.58%
9.84%
54.23%1.91%
13.53%
5.80%
5.14%
6.11% 0.86%
Sandvik (07/04)(50/20)
Breakdown 00:08:06
Delay 00:30:53
Drilling 02:50:07
Machine set up 00:05:59
Positioning 00:42:27
Pre-start check 00:18:12
Safety talk 00:16:07
Travel to face 00:19:10
10.60%
21.66%
41.22%
1.54%
8.76%
1.15%
11.04%
2.86%
Sandvik (09/04)(46/west)
Breakdown 00:39:44
Delay 01:21:11
Drilling 02:34:28
Machine set up 00:05:47
Positioning 00:32:50
Pre-start check 00:04:18
Safety talk 00:41:23
29.04%
50.14%
0.51%
9.52%
1.64%
4.85% 3.60%
0.70% (12/04)(46/west)
Delay 01:49:48
Drilling 03:09:34
Machine set up 00:01:56
Positioning 00:35:59
Pre-start check 00:06:13
Safety talk 00:18:21
Travelling to face
00:13:37

6. 11.65%
20.30%
42.88%
3.04%
9.95%
4.41%
2.67% 4.38% 0.73%
Sandvik (14/04)(50/20) Breakdown 00:53:12
Delay 01:32:44
Drilling 03:15:51
Machine set up 00:13:52
Positioning 00:45:26
Pre-start check 00:20:08
Safety talk 00:12:13
Travelling to face
00:19:59
6.35%
63.89%
1.68%
14.80%
7.87%
2.30%
Sandvik (16/04)(46/west)
Delay 00:19:22
Drilling 03:14:48
Machine set up
00:05:08
Positioning 00:45:08
Safety talk 00:24:00
Travelling to face
00:07:00
29.04%
50.14%
0.51%
9.52%
1.64%
4.85% 3.60% 0.70%
(12/04)(46/west)
Delay 01:49:48
Drilling 03:09:34
Machine set up 00:01:56
Positioning 00:35:59
Pre-start check 00:06:13
Safety talk 00:18:21
Travelling to face 00:13:37
Travelling to workshop
00:02:38

7. HPE located 46west on 29/03/2010
4%
14%
56%
7%
8%
7%
1%2%
1%
HPE (left boom)
braekdown
Delay
Drilling
Machine set up
Positioning
Pre-start check
Safety talk
Travel to face
Travel to work shop
4%
11%
56%
7%
10%
7%
1% 3% 1%
HPE (right boom)
braek down
Delay
Drilling
Machine set up
Positioning
Pre-start check
Safety talk
Travel to face
Travel to work shop
23%
54%
7%
10%
2% 2%
2%
HPE (right boom)
Delay
Drilling
Machine set up
Positioning
Safety taik
Travel to face
Travel to workshop
14.21%
19.11%
47.65%
7.06%
5.72%
2.40%
2.06%
1.78%
HPE (left boom)
Break down
00:34:26
Delay 00:46:19
Drilling 01:55:28
Machine set up
00:17:07
Positioning
00:13:51
Safety taik
00:05:49
Travel to face
00:05:00
Travel to workshop
00:04:19
HPE located at 46west (30/03/2010)

8. OVERALL ANALYSIS
58%
50%
56%
45%
54%
41%
50%
43%
64%
24.27%
8.63%
21.22%
29.40%
20.30%
1.35%
4.24%
0.63%
23.55%
2.58%
10.60%
0.00% 0.00%
12.38%
8.36%
14.28%
12.87% 13.53%
9.95%
14.80%
0.00%
10.00%
20.00%
30.00%
40.00%
50.00%
60.00%
70.00%
Sandvik
Drilling
Delays
Breakdowns
Positioning
The impact of a
breakdown and delays
results in less drilling,
sub standard operational
behavior
It also means that less face
holes were drilled,
compromising the quality of
the blast and then increasing
night shift time travelling to
station tips
The less delays and
breakdowns we have
the more efficient
the drill rig is and
the shorter the cycle

9. The graphs below illustrate the positioning of the operators, showing the date and work place.
00:00:00
00:00:43
00:01:26
00:02:10
1 3 5 7 9 11131517192123252729313335373941434547495153555759616365676971
Positioning(24/03)(50/26)
00:00:00
00:00:43
00:01:26
00:02:10
00:02:53
00:03:36
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63
Positioning(26/03)(46west)
00:00:00
00:00:43
00:01:26
00:02:10
1 3 5 7 9 111315171921232527293133353739414345474951535557596163656769717375
Positioning(06/04)(50/20)

10.  Assistant Instructors are the miner and shift boss in most cases
and this result in the frequency in positioning being inconsistent
and above the trend line.
 Moving the whole rig to position the boom.
 Installing support whiles rig is operating.
 Moving the boom whiles having a conversation with a colleague.
 Night shift cleaning process still in progress.
 Hoppers and loaders left in a rig’s paths by night shift crew.
 Electricity tripping whiles drill rigs are operating.
 Rig arriving at the face and awaits marking to be finished.
 Rig being derailed before reaching the face.
 Construction workers on top of battery box.

11.  With the HPE drill rig, it was found that both booms are
operating at 53.38% on average, average delays 16.53% and
breakdowns 7.43%.
 This is one reason why the crews using the HPE knock off with
the shift; the breakdowns are reduced by the technician’s
availability during operation and his commitment to fixing the
boom further after drilling.
 Their positioning as well (50.25sec average/boom) with drilling
average (4min 35sec/boom) contribute to the rigs efficiency at
46/west.

12.  On average drill rigs are currently drilling 51, 31% of their available time,
and from the above graph we see drilling moving between 40-60%.
 On 25/03,09/04,12/04and14/04 delays exceeded 20% because of the
following factors:
-(25/03,50/26) the rig delayed for 1hr:19min which counts 64% of the
total delays during the process caused by night shift cleaning process,
marking and preparing the face.
-(09/04,46/west) jumper was stuck on the rock frequently over 50 min
in total and 24min during pre-start check as well.
-(12/04,46/west). Before machine started drilling delays due to
hoppers left by night shift and power tripping was experienced
accounting to 94% of the total delays.
 24/03 and 16/04 delays and breakdowns were low because of lower
delays before drilling started.
 We can also see from the graph that the higher the breakdowns on the
rigs the less drilling will be achieved e.g. 06/04, 09/04, 14/04. Exceeding
10%.
 Positioning is much more stable contributing 11, 60% on average of the
total time and on the following dates we had a percentage greater than
10%.

13.  Delays occurring before drilling can be avoided
therefore miners should practically tell workers
to stop wasting time and prevent scenarios from
happening in advance including night shift.
 Eliminate the inconsistencies of operators
allocated locations of working areas.
 Technicians must be available through out the
drilling cycle at all levels.
 Miners & shift bosses should explain before hand
or during safety meetings how the operator
should drill, and partly monitor during the
drilling process.
 Attention must be given to the electricity cables
leading to connection boxes at (46/west).