Example MSHA Manual Pages


Some typical pages from second edition of the MSHA Engineering and Design Manual are presented below. The Manual is an update of the original Manual published in 1975 and is the MSHA standard for the design of coal refuse embankments and other aspects associated with coal refuse disposal sites. This new version of the Manual was prepared by a team of technical experts in the industry led by D'Appolonia. In addition to technical management of the project, the design and graphical content of the manual was developed by D'Appolonia staff.



 
Chapter 5, Page 5-4


This page of the Manual shows an illustration in plan and cross section of a refuse embankment con-structed using upstream and downstream staging through the second construction stage. The figure also shows some key components in facility design.






 
Chapter 5, Page 5-10


Figure 5.4 illustrates the concepts of 100-percent storage of the design storm runoff and the use of an open-channel spillway to route the design storm runoff . An impoundment that is designed to store the design storm runoff with release through a decant (Figure 5.4a) requires greater surcharge storage capacity than an impoundment that employs an open-channel spillway (Figure 5.4b).






 
Chapter 6, Page 6-11


A summary of published geotechnical data (average and range of values) for fine coal refuse samples, including their source location, is presented in Table 6.4. This table is based on samples collected from slurry impoundments and may reflect the effect of segregation that occurs with settling and deposition.





 
Chapter 6, Page 6-27


Figure 6.3 provides a classification of materials according to resistance to piping and cracking. If foundation settlements are expected to be high, a suitable internal drainage layer should be placed immediately downstream of the impervious zone to control seepage resulting from possible cracking.





 

Chapter 6, Page 6-88


Crosshole seismic surveys involve measurement of the travel time of seismic energy transmitted between two or preferably three boreholes to derive information relative to the elastic properties of the intervening materials. The borings are usually cased and grouted to the surrounding soil/rock. PVC casing is normally used for the tests, so that the casing is not a seismic pathway. A typical field setup for a crosshole seismic survey is shown.





 
Chapter 7, Page 7-70


Surface or near-surface active faults are the main sources of seismic hazard in the western U.S., whereas the eastern U.S. coal fi elds are affected primarily by three less-well-defined seismic sources: the New Madrid Seismic Zone, the Eastern Tennessee Seismic Zone, and the Charleston, South Carolina Seismic Zone as shown on the figure.






next



RETURN TO TOP OF PAGE