|
' ~ ~ .' :1
<br />... .~!'.
<br />• +,;}
<br />II. Ventilation System ~~r p
<br />• ;'~lY.rr
<br />A. Maps !;,; r.,~,y.~.
<br />1. Please Eind enclosed four (9) copies of an accurate;;.,ts:~~~?
<br />up-to-date map of Southfield Mine at a scale of 200' '~;^;;~;
<br />per inch. ""~,~``
<br />2. Overlaying transparent maps of equal scale showing :. ,..:,_'=
<br />old and abandoned mines in the same proximity of the;~,•;~~;•~q
<br />Southfield Mine are on file with MSHA's District•:;::;;;:tii4'
<br />Ventilation Department. :"r:;;:"u
<br />•:~1'=1
<br />II. Typical Mining Systems ;~;'„~;:~vfi
<br />1. Page 4 shows typical ventilation Eor a double split;:''~{;•,
<br />return system. • i:,:'~ .-,
<br />2, Page 5 shows typical ventilation for a single split.•,~r~e.
<br />return system. ~;~a~~2
<br />3. Hoth Pages 9 and 5 of this plan show only a typical;':"`;'
<br />arrangement of check curtains. •'~~l~ r
<br />C. Face Mining Cycle '~ .~~.
<br />1. Page 6 shows face ventilation during a typical min-~;•~•.~~w~,
<br />:a :~,.-
<br />ing cycle. -:•k•+~~
<br />2. Page 7 shows face ventilation during remote control;zn;
<br />. mining cycle. ...y`
<br />~`hr
<br />D. Section Mining Cycle '~:~~
<br />1. Return air curzent from the continuous miner shall'~:';•%?.~~'•.
<br />.:' .ry:
<br />not be used to ventilate roof bolting operations',.,:••..:,~j,%i:
<br />except when deemed necessary. ~ ,;•.~~~-i~:~;;r;
<br />2. When applicable, all breakthroughs should be made' ;~±rt•
<br />Erom the intake side to the return side to revent '~''~~
<br />P ,;r,;'
<br />dust from passing over 'the continuous miner opera-' ~~'''r'=
<br />tors . •;~~4.
<br />3. An entry, crosscut or room may be advanced a maximum : ~,..:1;=~
<br />distance of 150' inby the breakthrough, before the.=~;i'y"" "
<br />next breakthrough is made. •.3;~a,
<br />.•~,
<br />....,. ..
<br />G. Main Fan Operation(s)
<br />-.- 1. Operating specifications of all main fans are shown~,,~;:~i.
<br />' - on the enclosed ventilation maps. +';~•<..
<br />2. All main Ean installations shall meet the criteria .r`'~~~~5:
<br />found in 30 CFR 75.300-2 and 30 CFR 75.300-3, unless.~.~'_
<br />a variance is granted by the District Manager. ~.. ,:}.t; +N
<br />3. The Ean stoppage plan as required by 30 CFR 75;3~21~
<br />addresses the event of a fan failure. •~~~
<br />,,ti;
<br />.. ,,;:ti: , ,,.
<br />.~. ., ~: ;.~;.~lt;
<br />F. Construction and Use of Ventilation Controls ~':rt~
<br />la. All ventilating controls such as stoppings, over- -
<br />r_asts, undercasl-s, doors, regulators, etc. shall be
<br />• of subsl-antial. and incombustible construction to all
<br />possible and ptactical extent, installed in a work-
<br />manlike manner and maintained in the condition fo ,...•.,.,I
<br />serve the purpose Eot which they were intended. The....=:,~.';:';
<br />intent I~eing to direct air to the sections and work- ::.~::"~~`'.
<br />ing faces and to separate entries for esca ewa ~~'~`'
<br />purposes. P Y....':'.,:
<br />b. ['e nnanent stoppings shall be erected between the'.
<br />•nb,Irn ~nA ,.,~P~..-n -..r rni.rr-nr ~n,l .-1.11 L.n mainf n ^,•]~'~'
<br />a
<br />
|