PERMFILE116326

• Permit No: C1984063
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: APPENDIX M SUBSIDENCE PREDICTION AT THE EASTSIDE COAL COMPANY
• Media Type: D
• Archive: No

•
L ~i
8. SUBSIDENCE MONITORING PRO(32AM
As has been already mentioned, the E seam is to be mine.i by tJ~r
roan and pillar mining method. Pillars are designed to be stable
for an enterr)ed period of time. Local failures of pillars may occur.
Nevertheless, such failures are not expected to cause serious dami~Ic.
on the surfar_e.
If a large number of pillars do fail, a maximum subsidence of a
2.317 meters could be expected in the worst case. Ttte subsidence
then should be limited to a much narro~er zone than in the case of a
flat-bedded seam. In the case of the E seam the subsidencz thus ~s
• expected to be concentrated mainly along the line of the naximwri
subsidence (see Figure 7h, line No. I). The readings of the monu-
ments will 6e taken immediately after the monuments are install.e:J
and checked for their rigidity. Readinys mill be repeated every
three months in order to verify the initial positions of monuments.
•