MULSIM/NL application and practitioner's manual

Journal Article · Wed Jan 01 04:00:00 EST 1992 · Information Circular - United States, Bureau of Mines; (United States)

OSTI ID:6417686

Zipf, Jr, 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. 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 [open quotes]MULSIM/NL-Theoretical and Programmer's Manual[close quotes] 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 models, (2) multiple mining steps, and (3) comprehensive energy release and strain energy computation. 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 stimulate a changing mine geometry. Finally, MULSIM/NL performs comprehensive energy release rate calculations.

• OSTI ID: 6417686
• Journal Information: Information Circular - United States, Bureau of Mines; (United States), Journal Name: Information Circular - United States, Bureau of Mines; (United States) Vol. 9322; ISSN XIMIAL; ISSN 0096-1914
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012031* -- Coal
Lignite
& Peat-- Underground Mining-- Strata Mechanics & Control-- (1987-)
BOUNDARY ELEMENT METHOD
CALCULATION METHODS
COAL MINES
COAL MINING
COMPUTER CALCULATIONS
COMPUTERIZED SIMULATION
DISPLACEMENT RATES
DOCUMENT TYPES
FINITE ELEMENT METHOD
MANUALS
MINES
MINING
NATIONAL ORGANIZATIONS
NUMERICAL SOLUTION
PROGRAMMING
SIMULATION
STRESS ANALYSIS
UNDERGROUND FACILITIES
US BUREAU OF MINES
US DOI
US ORGANIZATIONS