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2024-06-25_PERMIT FILE - C1980007 (7)
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2024-06-25_PERMIT FILE - C1980007 (7)
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Last modified
7/30/2024 10:25:17 AM
Creation date
7/30/2024 10:24:24 AM
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Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
Permit File
Doc Date
6/25/2024
Doc Name
Exhibit 84 Geotechnical Assessment for Pillar Extraction in Sunset South Mains
Section_Exhibit Name
Exhibit 84 Geotechnical Assessment for Pillar Extraction in Sunset South Mains
Media Type
D
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No
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April 22, 2024 Page 2-2 <br />Agapito Associates, Inc. <br />This relationship suggests that any measurable abutment loads from LW E14 and LW E7 will be <br />limited to a lateral extent of 250 and 270 ft, respectively. <br />This area of the mine is absent of any underlying mine workings in the B seam and as such, the <br />pillars are not subject to multi-seam stress. <br />In terms of the existing roof support installed in Sunset Mains, the mine has indicated that the <br />roadways were typically supported with a four to five ⅞-inch, Grade 75 partially encapsulated <br />bolts every 5 ft. To date, there does not appear to have been any major roof falls in the travelways, <br />which suggests that the installed roof support density was sufficient for the purpose of maintaining <br />roof stability. It is assumed that the planned development in the panel will utilize a similar roof <br />support density.
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