Twelve Methane HPI’s March 4th to 15th 2018
Before the planned Audit of the PMPM for Gas Monitoring is due to take place there are at least Twelve (12) Methane HPI’s reported to the DNRME Inspectors.
Eight (8) of these occur on 2 days the 13th and 14th of March.
| Date | Time of
Exceedance Inspector Reported to |
s243(a) Sensor (“149 Sensor”) | Tailgate Sensor — 400m outbye
(“Inbye Sensor”) |
Tailgate Sensor — 34 cit
(“Outbye Sensor”) |
Time over 2.5% | Factors mentioned |
| 1) 04/03/2018 | 6:21am
Scully |
Unknown | 2.52% | Unknown | 2 Minutes and 22 seconds | Shearer stopped At Chock #115 TG -MG
Outbye belts down
|
| 2) 08/03/2018 | 4:28am
Gouldstone |
Unknown | Unknown | 2.53% at 3:13am
2.54% at 4:39am |
4 Minutes
22 Minutes |
Double Chocking.
2 events. Stopped double chocking in between. Longwall stopped at 1:44am high gas in TG. Only 5 shears previous 12 hours |
| 3) 12/03/2018 | 10:55pm
Gouldstone |
Unknown | 2.61% | Does not change
WHY? |
1 Minute | Goaf Flushing around #149 |
| 4) 13/03/2018 | 8:09am
Gouldstone |
Unknown | 2.87% | 2.79%
11 minutes later |
Unknown | 3 Cuts TG to bring TG forward due to poor roof.
Gas Flush when chocks advanced Daily TG gas M’ment IMT |
| 5) 13/03/2018 | 2:55pm
Gouldstone |
Unknown | 2.52% at 2:55pm
2.53% at 4:23pm |
2.53% at 3:06pm
2.60% at 4:36pm |
8 Minutes | 2 Cuts TG to bring TG forward due to poor roof
Gas Flush when chocks advanced |
| 6) 13/03/2018 | 23:54pm
Brown |
Unknown | 2.76% | 70 seconds | Cut into TG
Shearer parked at #115. Crew started bringing over chocks
|
|
| 7) 14/03/2018 | 3:37am
Marlborough |
Unknown | 3.21% | 2.65% | 1 Minute | Shearer Cutting TG corner of face |
| 8) 14/03/2018 | 4:51am
Brown |
Unknown | 2.56% | 2.73% | 5 Minutes | Poor Roof Conditions in TG Ventilation path restricted |
| 9) 14/03/2018 | 7:20am
Brown |
Unknown | 2.7% | 2.59% | 5 Minutes | 2 Cuts TG to bring TG forward due to poor roof
Gas Flush when chocks advanced Shearer stopped at time |
| 10) 14/03/2018 | 1:29pm
Marlborough |
Unknown | 2.53% | 9 Minutes
Were workers in TG working in greater than 1.25%? |
Shearer parked at MG Maintenance since 8:40am, Workers in TG supporting roof.
Attributed to goaf fall |
|
| 11) 14/03/2018 | 2:47pm
Brown |
Unknown | <2.5% | 2.59% | 45 Minutes | Shearer parked at MG Maintenance since 8:40am |
| 12) 15/03/2018 | 11:18pm
Gouldstone |
Unknown | Unknown
<2.5% |
2.62% | 33 Minutes | Longwall not producing
Goaf Flushing #149 AFC run gas goes <2.5%
|
