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APPCOR11268
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APPCOR11268
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Last modified
8/24/2016 6:31:38 PM
Creation date
11/19/2007 2:19:04 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981039
IBM Index Class Name
Application Correspondence
Doc Date
5/8/1984
Doc Name
GRASSY GAP BONDING
From
MLRD
To
FILE C-039-81
Media Type
D
Archive
No
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l <br />Fi <br /> <br />Pusher-Scraper Combination: <br />l luu+~ <br />From .p. 449, the boost time = 0.10 minutes <br />Return time = 40% of load time ~0Y~~~ <br />Manuever time = 0.15 minutes <br />THEREFORE, Pusher Cycle Time = 140% of load time + 0.25 minutes <br />Load time from Chart on p. 166 = 0.6 minutes <br />THEREFORE, Pusher Cycle Time = 1.4(.6) + 0.25 = 1.09 minutes <br />,~ .~J y~ <7 .13 <br />Scraper Cycle Time = load + haul + manuever & spread + return <br />Manuever & spread time from p. 166 = 0.7 minutes <br />o [L <br />THEREFORE, Scraper Cycle Time = 0.6 + 0.73 + 0.7 + 2.3 = 4.33 minutes <br />`~~L <br />Number of Scrapers handled by each Pusher: = 4.33/1.09 = 3.97 (Use 4 scrapers) <br />Backfilling Pit from Stockpile: Owning & Operating Costs from p. 409 & 410. <br />No. of Pieces Equipment Type <br />~l ti~ ( <br />4 ~4r5'~ 631D Scrapers <br />1 D9L Tractor Pusher <br />1 D8K Tractor Dozer <br />1 Cat 14G Motor Grader <br />1 Foreman <br />7 Operators <br />Hourly Rate Total Hourly Rate <br />LIJf <br />l <br />~ Jd <br />~' A'9 k re~lx~~.~-l4/y Pro n.k~ t <br />SoL..~~ <br />9~± <br />~ <br />$ <br />ia9~~5 ~5k~~ 00 <br />39,46• <br />~.V <br />~0" 6 <br />90 <br />~' -60' ~ e ~ , oa <br />43 A3' 4 ~, ~ <br />20 20`lc ao, oa <br />14 98 !~ 95. ~~ <br />Total: $6 ~ ~oo8~oa <br />Unit Cost for Backfilling_Overburden: <br />Total Production: Assume 90% efficient = (0.9)(60 minutes/hr) = 54 min./hr <br />~ 6<< <br />THEN: (54 minutesfhr)/4.33 minutes cycle time/load = 12.47 loads/hr (Use 12) <br />ol~ <br />From p. 500, load factor = 0.8 <br />ot< <br />Estimated load = 31 cubic yard capacity x 0.8 = 24.8 cubic yards (Use 25) <br />
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