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ENFORCE27898
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ENFORCE27898
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Entry Properties
Last modified
8/24/2016 7:35:21 PM
Creation date
11/21/2007 11:46:05 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981019
IBM Index Class Name
Enforcement
Doc Date
12/10/1992
Doc Name
COLOWYO COAL MINE C-81-019 MR-22 REVISION OF BLASTING SKETCHES TDN X-92-02-0244-2 TV-2
From
DMG
To
COLOWYO COAL CO
Violation No.
TD1992020244002TV2
Media Type
D
Archive
No
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.: <br />2 <br />Permissible Weight of Explosives per = (Distance / 55 ) <br />Delay Period <br />2 <br />_ (4800 /55 ) <br />= 7,616 pounds of <br />explosives <br />4. The value given in the text for total number of holes (28) does not agree with the value <br />for number of holes as shown in the sketch (count = 40) or described along the mazgins <br />of the sketch (6 x 8 = 48). Please verify the total number of holes fired. <br />5. The value given for total weight of explosives used may also be in error. Please verify. <br />6. The text portion of the blasting report refers to remazks on the other side of the report. <br />The Division was not given those remarks. The Division might find this information <br />helpful in interpreting this blasting report. Please submit this information. <br />Overburden Blast -November 20. 1992: <br />1. It appears from the sketch that two rows aze firing at any one instant (away from the <br />central row). The value given in the text for the number of holes per 8 ms delay (8) <br />does not agree with the number of holes firing during an 8 ms delay as a result of two <br />rows firing simultaneously (2 x 18 = 36). The Division is uncleaz, in any case, as to how <br />Colowyo arrived at a value of 8 for the maximum number of holes per 8 ms period. <br />Please verify the maximum number of holes fired during an 8 ms delay period. <br />2. The value given in the text for pounds of explosives per 8 tns delay (2,592) does not <br />agree with the amount calculated by the Division given the number of holes per 8 ms <br />delay as shown by the sketch (36 x 144 = 5,184). Please verify the maximum amount <br />of explosives fired during any 8 ms delay. <br />3. The value given in the text for total number of holes (148) does not agree with the <br />number of holes as described in the margins of the sketch (9 x 18 = 162}. Please verify <br />the number of holes fired. <br />4. The value given for the totai weight of explosives used may also be in error. Please <br />verify. <br />Coal Blast -November 24. 1992: <br />1. The value given in the text for total number of holes (140), does not agree with the <br />number of holes as described in the margins of the sketch (15 x 17 = 255). Please verify <br />the total number of holes fired. <br />
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