Dozer Engulfment Case Study Jack Katlic Sr VP-Fuel Supply, AEP-Retired Mark Skiles Director of Technical Support, MSHA Phil Southern Bodygard Sunnie Southern BodygardSlide 2
Dozer Engulfment Case Study Agenda Surge Pile Hazards Surge Pile Accidents Solutions for Stronger Cab Windows Demonstration Conclusion Panel DiscussionSlide 3
Dozer Engulfment Case Study Purpose Share one strategy the coal business has actualized to spare livesSlide 4
Surge Pile HazardsSlide 5
Surge Pile Safety Slides with the MSHA logo were adjusted from the MSHA site and can be found at: www.msha.gov Directorate of Technical Support Mine Safety and Health AdministrationSlide 6
Surge Pile Hazards Feeding material acts like "sand trap"Slide 7
Surge Pile Hazards The edge of the drawhole is insecureSlide 8
Surge Pile Hazards Poor perceivabilitySlide 9
Surge Pile Hazards Since 1980, 19 people have passed on in coal mining related surge heap mishaps Most of the mischances have included a concealed hole made when material "connected" over a feederSlide 10
Causes of "Crossing over" Over a Surge Pile Feeder Bridging can happen When gear transverses the material at the surface of the heap Surface material compacts making a false roadway "Settling in" may happen in a sit without moving heap and increment chanceSlide 11
Surge Pile AccidentsSlide 12
Dozer Buried in Cavity Note the thickness of the material that had been spanned overSlide 13
Partially Buried Bulldozer in Fatal Accident in Pennsylvania A shrouded hole given way under the dozer while it was pushing coal on the heapSlide 14
Most deadly mischances happened when the dozer taxicab windows either broke, or were pushed into the taxi, permitting coal to fill the taxiSlide 15
Cab Filled with Coal The coal has softened or pushed up the taxicab windows and filled the taxiSlide 16
Windshield pushed once again into taxi Note: orange protest under windshield is an independent self rescuer (SCSR)Slide 17
Best Practices: Ways to Improve Surge Pile SafetySlide 18
Best Practices: Surge Pile Safety Provide hardware taxis sufficiently solid to oppose entombment weightsSlide 19
Solutions for Stronger Cab WindowsSlide 20
Available Solutions for Stronger Cab Windows MSHA activity Use of high-quality glass Massey approach Add backings to within the taxi windows - joined with utilizing to some degree more grounded glass Use of polycarbonate windows Adequate quality Support around edges needs to consider higher diversion Issue of scratch-resistance Bodygard framework A tweaked polycarbonate frameworkSlide 21
Massey SubkitSlide 22
Massey Subkit The main framework Most generally utilized Effective as a part of sparing lives System configuration is involved metal bars appended to within the taxicab keep the taxi and glass from crumpling on the administratorSlide 23
The Massey Approach Installed bolster bars within the taxicab windows The backings for the right-side entryway window are appeared hereSlide 24
The Massey Approach Horizontal bolster bars and extra edge bolster for the windshield are appeared hereSlide 25
The Massey Approach Massey\'s fruitful internment exhibition The glass split yet it held the coal out of the taxiSlide 26
Contrast this scene after the Massey showing - where coal was held out of the taxi - with...Slide 27
This scene from a mishap, where coal has filled the taxicab...Slide 28
Advantages Keeps taxis from giving way Least costly Saves lives Disadvantages Obscures vision particularly when moving down Causes cycildelic influences that outcome in protestations of cerebral pain from administrators Metal bars shake and increment clamor level in the lodge Metal bars release and break entryway glass that must be supplanted Massey SubkitSlide 29
PPG Preformed Pre-planned ProductSlide 30
PPG Preformed Pre-outlined Product Created as according to popular demand of MSHA to conquer the lacks of the subkit System plan An artificially solidified preformed pre-composed item Installed by sticking the glass into a gasket is introduced in same house as standard glass bundlesSlide 31
High-quality glass introduced utilizing urethane glueSlide 32
Field Burial Demonstration Federal No. 2 Mine Near Morgantown, WVSlide 33
High-quality glass introduced in all taxicab windows of test dozerSlide 34
Dozer with high-quality glass being covered in coal heapSlide 35
Buried dozer being uncoveredSlide 36
Checking windows after entombmentSlide 37
High-quality glass in place after internment exhibitionSlide 38
Advantages Does not hinder vision Resists static weight up to 40 psi Disadvantages Preformed consequently application is constrained to Caterpillar and Komatsu dozer\'s* standard taxicab bundles Requires settling of any disfigurement of the taxicab earlier establishment of the glass Most costly May break when affected May fly out under anxiety PPG Preformed Pre-planned Product PPG Pounds per square inch *Molds are just for dozers not for end loadersSlide 39
Bodygard SystemSlide 40
Bodygard System Custom built Custom introduced Polycarbonate framework Outboard seat is made Material is mechanically join to the taxicab Inhibits interior crumple Unbreakable Noise encasing in the vicinity establishment All makers MSHA endorsedSlide 41
Case Study History Massey led drop trial of 3 frameworks to decide the best framework The accompanying exhibit demonstrates the aftereffects of the testSlide 42
Dozer Drop Test DemonstrationSlide 43
Advantages Unbreakable Does not discourage vision Can be made to fit anything (all makes and models of existing hardware) Absorbs and protects sound Broad construct framework Onsite tweaked establishment in light of all taxis Installed nearby by boring and connecting to taxi Cut to specs and appended to guarantee soundness Disadvantage* Is less scratch safe that customary glass in this manner a defensive covering is connected that is simple and cheap to supplant Bodygard System Body Guard *Protective replicable material is connected to enhance the scratch resistanceSlide 44
Conclusion Based on the consequences of the drop test, Massey marked a national contract with Bodygard to play out their establishmentsSlide 45
BODYGARD "The Safety Window People" 1 Lincoln Center, Shinnston, WV 26431 www.bodygard.com 304-592-1980
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