MULSIM/NL application and practitioner's manual. Information circular/1992

Technical Report · Wed Jan 01 04:00:00 EST 1992

OSTI ID:6815631

Zipf, R K

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. The manual gives detailed operating instructions for MULSIM/NL and illustrates its use with several practical examples. While the manual concentrates on the practical aspects of actually running and using MULSIM/NL, another companion document 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, namely, (1) nonlinear material models; (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.

• Research Organization: Bureau of Mines, Denver, CO (United States). Denver Research Center
• OSTI ID: 6815631
• Report Number(s): PB-93-131993/XAB; BUMINES-IC--9322
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012031* -- Coal
Lignite
& Peat-- Underground Mining-- Strata Mechanics & Control-- (1987-)
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ABSTRACTS
ANIMALS
BLOOD VESSELS
BODY
BOUNDARY ELEMENT METHOD
CALCULATION METHODS
CARDIOVASCULAR SYSTEM
COAL MINES
COMPUTERIZED SIMULATION
CONVERGENCE
COORDINATES
DATA
DOCUMENT TYPES
ELECTRODES
ENGINEERING
ENGINEERS
FINITE ELEMENT METHOD
FORTRAN
GEOMETRY
GRIDS
INFORMATION
LEADING ABSTRACT
LINEAR PROGRAMMING
MAMMALS
MAN
MATHEMATICAL MODELS
MATHEMATICS
MINES
MINING ENGINEERING
NUMERICAL DATA
NUMERICAL SOLUTION
ORGANS
PARALLEL PROCESSING
PERSONNEL
PRIMATES
PROFESSIONAL PERSONNEL
PROGRAMMING
PROGRAMMING LANGUAGES
SIMULATION
STRESS ANALYSIS
STRESSES
THEORETICAL DATA
UNDERGROUND FACILITIES
VEINS
VERTEBRATES