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Mining Publication: MULSIM/NL Application and Practitioner's Manual
Keywords: Coal mining Computer simulation Convergence Rock mechanics
Original creation date: January 1992
Authors: RK Zipf
Information Circular - January 1992
Download PDF Document (4.29 MB)
NIOSHTIC2 Number: 10011467
U.S. Department of the Interior, Bureau of Mines, Information Circular 9322, 1992 Jan:1-48
MULSIM/NL (multiple seams, nonlinear) is a new U.S. Bureau of Mines boundary-element-method (BEM) program for calculating stresses and displacements (i.e., convergence) in coal mines or thin, tabular metalliferous veins. This manual gives detailed operating instructions for MULSIM/NL and illustrates its use with several practical examples. While this manual concentrates on the practical aspects of actually running and using MULSIM/NL, another companion report titled "MULSIM/NL-Theoretical and Programmer's Manual" provides mathematical and programming details to those engineers and programmers who need to fully understand the FORTRAN program or desire to alter and enhance it. MULSIM/NL analyzes one to four parallel seams that have any orientation with respect to the Earth's surface. Three main features distinguish MULSIM/NL from its predecessors: (1) nonlinear material modes, (2) multiple mining steps, and (3) comprehensive energy release and strain energy computations. MULSIM/NL has six material models for the in-seam material including (1) linear elastic for coal, (2) strain softening, (3) elastic plastic, (4) bilinear hardening, (5) strain hardening, and (6) linear elastic for gob. The multiple mining step capability enables the user to simulate a changing mine geometry. Finally, MULSIM/NL performs comprehensive energy release rate calculations.
Image of publication MULSIM/NL Application and Practitioner's ManualInformation Circular - January 1992
Download PDF Document (4.29 MB)
NIOSHTIC2 Number: 10011467
U.S. Department of the Interior, Bureau of Mines, Information Circular 9322, 1992 Jan:1-48
See Also
Development and Application of Reservoir Models and Artificial Neural Networks for Optimizing Ventilation Air Requirements in Development Mining of Coal Seams
The Effects of Roof and Floor Interface Slip on Coal Pillar Behavior
Elastic and Shear Moduli of Coal Measure Rocks Derived from Basic Well Logs Using Fractal Statistics and Radial Basis Functions
MULSIM/NL Theoretical and Programmer's Manual
Pillar Mechanics of Coal Mine Bursts: A Control Strategy
Research and Development Contract for Coal Mine Communication System: Volume 3 - Theoretical Data Base
Reservoir Rock Properties of Coal Measure Strata of the Lower Monongahela Group, Greene County (Southwestern Pennsylvania), from Methane Control and Production Perspectives
Rock Mechanics Study of Shaft Stability and Pillar Mining, Homestake Mine, Lead, SD (In Three Parts): 2. Mine Measurements and Confirmation of Premining Results
Rock Mechanics Study of Shaft Stability and Pillar Mining, Homestake Mine, Lead, SD (In Three Parts): 3. Geomechanical Monitoring and Modeling Using UTAH3
SPONCOM - A Computer Program for the Prediction of the Spontaneous Combustion Potential of an Underground Coal Mine
Technology News 545 - NIOSH Updates Spontaneous Combustion Assessment Software
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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