2009-05-12_PERMIT FILE - C1980005 ‎(2)‎

• Permit No: C1980005
• IBM Index Class Name: Permit File
• Doc Date: 5/12/2009
• Section_Exhibit Name: Tab 12 Operation Plan
• Media Type: D
• Archive: No

State Reg.
• 2.05.3(6)
(a)
•
•
BLASTING PLAN
Peabody Coal Company will drill and blast overburden parting
and coal materials in the proposed permit area at the Seneca II
~4ine site. The overburden above the Wadge and Lennox coal
seams will be drilled with a rotary air drill. The finished
holes will measure approximately 9 inches in diameter. The
overburden above the Wolf Creek coal seam will also be drilled
by a rotary air drill. The finished holes will measure
approximately 10-5/8 inches in diameter. Pattern size will
vary depending upon overburden depth and may range from 18' x
28' to 25' x 30'.
After the holes are drilled they are loaded with either an
ammonium-nitrate fuel-oil mixture (ANFO) or a water gel
(slurry) depending on the moisture in the drilled hole. The
loading rate is approximately 10 lbs./foot of drill hole depth.
Cast primers and detonation cord are placed down the hole
during the loading of the ANFO or water gel to insure proper
blast hole detonation.
After the holes are loaded and a decision is made to prepare
the holes for firing, milli-second (M-S) delay connectors will
be inserted into the circuit to insure proper fragmentation,
and minimize vibration, air blast, dust generation and flyrock.
Once the (M-S) delay connectors are inserted into the circuit,
the shot is now ready to be detonated.
The maximum weight of the explosive to be detonated per blast
will not exceed the allowable weight specified by the formula
W = (D/60)z where W = the maximum weight of explosives in
pounds that can be detonated in any 8 milli-second period, and
D = the distance in feet from the blast site to the nearest
dwelling, school, church, or institutional building.
12-39 Revised 8/27/86