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Design of Surface Mine Haulage Roads - a Manual by Walter W

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Design of Surface Mine Haulage Roads - a Manual by Walter W Information Circular 8758 Design of Surface Mine Haulage Roads - A Manual By Walter W. Kaufman and James C. Ault UNITED STATES DEPARTMENT OF THE INTERIOR Cecil D. Andrus, Secretary BUREAU OF MINES WMC Resources Ltd have the expressed permission of the "National Institute for Occupational Safety and Health" to replicate and present this document in Full for use by its employee's. This document was kindly supplied by the: National Institute for Occupational Safety and Health Pittsburgh Research Laboratory Library P.O. Box 18070 PITTSBURCH, PA 15236-0070 Page 1 of 49 CONTENTS ABSTRACT .....................................................................................................................................................4 INTRODUCTION .............................................................................................................................................4 HAULAGE ROAD ALIGNMENT ..........................................................................................................................4 Stopping Distance--Grade and Brake Relationships .......................................................................................5 Sight Distance ............................................................................................................................................8 Vertical Alignment ......................................................................................................................................9 Maximum and Sustained Grades..............................................................................................................9 Vertical Curves .....................................................................................................................................11 Horizontal Alignment ................................................................................................................................13 Superelevation Rate..............................................................................................................................13 Superelevation Runout..........................................................................................................................14 Sharp Curve Design--Widening on Curves ..............................................................................................15 Combination of Horizontal and Vertical Alignment.......................................................................................17 HAULAGE ROAD CROSS SECTION .................................................................................................................17 Sub base..................................................................................................................................................17 Surface Materials......................................................................................................................................20 Asphaltic Concrete................................................................................................................................22 Compacted Gravel and Crushed Stone ...................................................................................................23 Stabilized Earth ....................................................................................................................................25 Haulageway Width....................................................................................................................................25 Cross Slope ..............................................................................................................................................27 Conventional Parallel Berms ......................................................................................................................27 Traffic Signs .............................................................................................................................................29 Speed Limit Signs .................................................................................................................................29 Stop Signs............................................................................................................................................29 Curve and Intersection Warning Signs ...................................................................................................30 Culvert Crossing Markers.......................................................................................................................30 Traffic Control Signs .............................................................................................................................30 Limited Access Designators ...................................................................................................................30 Safety Access Indicators .......................................................................................................................30 Drainage Provisions ..................................................................................................................................30 Ditch Configuration and Location ...........................................................................................................30 Ditch Capacity and Protection................................................................................................................31 Culverts ...............................................................................................................................................32 Location...........................................................................................................................................32 Type and Size ..................................................................................................................................33 Placement........................................................................................................................................34 Inlet-Outlet Controls .........................................................................................................................34 Typical Haulageway Sections.....................................................................................................................36 Page 2 of 49 ROAD MAINTENANCE CRITERIA....................................................................................................................38 VEHICLE MAINTENANCE CRITERIA ...............................................................................................................39 RUNAWAY VEHICLE SAFETY PROVISIONS .....................................................................................................41 Runaway Vehicle Collision Berms...............................................................................................................42 Escape Lanes ...........................................................................................................................................44 Entrance ..............................................................................................................................................44 Deceleration.........................................................................................................................................44 Stopping ..............................................................................................................................................45 CONCLUSIONS .............................................................................................................................................46 Appendix......................................................................................................................................................48 Page 3 of 49 Design of Surface Mine Haulage Roads – A Manual By Walter W. Kaufman and James C. Ault ABSTRACT This Bureau of Mines manual for design of surface mine haulage roads covers such aspects of haulage road design as road alignment (both vertical and horizontal), construction materials, cross slope, and drainage provisions. Traffic control and design of proper lane widths to promote safe vehicle movement are included, as are suggested criteria for road and vehicle maintenance and for runaway vehicle safety provisions. The aim of this publication is to provide those involved with surface mine haulage road design with a complete manual of recommended practices that, if implemented, will promote safer, more efficient haulage routes. INTRODUCTION During the past 30 years, surface mine haulage equipment has developed from trucks capable of moving 20 tons of material to vehicles that transport as much as 350 tons. Unfortunately, the design of roads this equipment must traverse has not advanced at the same rate. In many areas, road-building technology appropriate to vehicles of three decades past is still being practiced today. As a result, numerous unnecessary haulage road accidents have occurred every year. A number of these mishaps can be attributed to operator error. However, far too many are caused by road conditions that are beyond the vehicle's ability to negotiate safely. With this history of haulage related problems in mind, the Bureau of Mines undertook a project to produce a design manual that would ultimately guide surface mine road planners toward safer, more efficient haulage systems. Such a manual did not exist prior to the conclusion of this project. This manual was
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