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2012-08-24_REPORT - M1980244 (10)
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2012-08-24_REPORT - M1980244 (10)
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Entry Properties
Last modified
8/24/2016 5:05:51 PM
Creation date
8/28/2012 2:55:03 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1980244
IBM Index Class Name
REPORT
Doc Date
8/24/2012
Doc Name
CQA REPORT, MAY 2012
From
CC&V
To
DRMS
Type & Sequence
AM10
Email Name
TC1
Media Type
D
Archive
No
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W II <br />LTMS <br />Confirmatory drilling was performed at Underground Working #4073 using two track mounted drill <br />rigs. A drill pattern was set out by an AMEC field representative. Forty -five holes were drilled <br />encountering nine voids. An approximate total of 2,250 linear feet was drilled. As -built survey of <br />the drill holes was performed by Ames. <br />Confirmatory drilling was performed at Underground Working #4081 using two track mounted drill <br />rigs. A drill pattern was set out by an AMEC field representative. Ten holes were drilled <br />encountering zero voids. An approximate total of 500 linear feet was drilled. As -built survey of the <br />drill holes was performed by Ames. <br />Grouting of missed (non -void) confirmatory drill holes was performed at Underground Workings <br />#4074 and #4081. A grout pump and laborers were used to place bentonite grout into the "miss" <br />drill holes. <br />C) Remediation <br />Remediation of Underground Working #4052 was performed excavating the crown pillar from the <br />working. A portion of the crown pillar was removed during the excavation. The remaining crown <br />pillar will be drilled and collapsed by blasting. <br />Underground Working #4082 was investigated using a CAT 330 excavator and observation was <br />performed by an AMEC field representative. Excavation of the area was performed and it was <br />found to be a shallow surface working. The native material was found to be consistent and all <br />signs of a significant working were removed. The working was backfilled by placing small lifts and <br />bucket tamping until access for a CAT 563 vibratory smooth drum compactor was achieved. The <br />material was then placed in 18" to 24" lifts. Each lift was moisture conditioned using a tandem <br />axle water truck (when necessary) and compacted using a 10 -ton vibratory smooth drum <br />compactor, passing over the entire fill surface at least 4 times (method compaction technique was <br />applicable). An AMEC field representative observed the remediation of the underground working. <br />An AMEC field representative inspected Underground Working #4083. There is a shaft present in <br />the working and a concrete plug will be placed in the working. Confirmatory drilling will be <br />performed when a drill rig is available. <br />Underground Working #4084 was investigated using a CAT 330 excavator and observation was <br />performed by an AMEC field representative. Excavation of the area was performed and it was <br />found to be a shallow surface working. The native material was found to be consistent and all <br />signs of a significant working were removed. The working was backfilled by placing small lifts and <br />bucket tamping until access for a CAT 563 vibratory smooth drum compactor was achieved. The <br />material was then placed in 18" to 24" lifts. Each lift was moisture conditioned using a tandem <br />axle water truck (when necessary) and compacted using a 10 -ton vibratory smooth drum <br />compactor, passing over the entire fill surface at least 4 times (method compaction technique was <br />applicable). An AMEC field representative observed the remediation of the underground working. <br />Underground Working #4085 was investigated using a CAT 330 excavator and observation was <br />performed by an AMEC field representative. Excavation of the area was performed and it was <br />found to be a shallow surface working. The native material was found to be consistent and all <br />signs of a significant working were removed. The working was backfilled by placing small lifts and <br />bucket tamping until access for a CAT 563 vibratory smooth drum compactor was achieved. The <br />material was then placed in 18" to 24" lifts. Each lift was moisture conditioned using a tandem <br />axle water truck (when necessary) and compacted using a 10 -ton vibratory smooth drum <br />MEW Weekly Report WE 05.05.2012 <br />
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