Supercomputer Assisted Three-Dimensional Finite Element Analysis Of A Longwall Panel

Park, Duk-Won
Organization: International Conference on Ground Control in Mining
Pages: 8
Publication Date: Jan 1, 1989
The excavation of a longwall panel causes a continuous stress redistribution in the surrounding strata for every face advancement. The understanding of the behavior of rock to high level of stresses is instrumental to the structural design of underground mines. In order to achieve a realistic analysis of the behavior of strata, the three-dimensional finite element method is frequently used. Also the model developed for the analysis has to be designed large enough to represent the influenced strata in the study area and a sufficient number of elements has to be used to provide detailed information on the stresses and displacements. Due to the size of the model and its numerical solution the CRAY X-MP/24 supercomputer has been used for this study. The mine site selected for the analysis is a coal mine located in the Black Warrior Basin in Alabama. The mine has two longwall sections at a depth of 2,000 feet with various dimensions of chain pillars, including yield pillars. Various research programs at this mine have been carried out by Park et. al. ( 1984 ). Therefore data were already available on the geology, and physical properties of rock and coal. In addition a rock testing program has been carried out to obtain rock mass classification parameters. The progressive failure technique has been utilized to simulate stress redistributions. The failure criterion after Hoek and Brown ( 1980 ) which is based on rock mass behavior was used for the iterative technique. Simulated stress redistributions are therefore very realistic. In order to automate the process involved in the application of progressive failure technique, a computer program has been developed. The combination of a large scale three-dimensional finite element model and the automation of progressive failure simulation provided a tool that can generate a large amount of information related to the behavior of rock and coal as a response to a longwall mining operation.
Full Article Download:
(2347 kb)

Additional chapters/articles from the SME-ICGCM book Rock Mechanics as a Guide for Efficient Utilization of Natural Resources

Rock Mechanics And Ground Control For Underground Mining And
Underground Storage, With Emphasis On Storage In Excavated R
Rock Classification For Portal Design
Laboratory And Field Characterization Of Immediate Floor Str
Comparative Study Of Western US Longwall Panel Entry Systems
Supercomputer Assisted Three-Dimensional Finite Element Anal
DEPOWS - A Powered Support Selection Model
A Study Of Displacement Field Of Main Roof In Longwall Minin
Cavability Investigation Of A Stratabound Copper Deposit, To
Influence Of Discontinuity Orientations And Strength On Cava
Premining Stability Analysis Of A Shaft Pillar At The Homest
Identification Of Critical Slope Failure Surfaces With Criti
Improving Design Methodology For Innovative Rock Mechanics D
Stability Evaluation Of Alternative Designs Of Drift-And-Fil
In Situ Stress For Underground Excavation Design In A Natura
Application Of Physical And Mathematical Modelling In Underg
Complex Seismic Trace Attributes In Coal Exploration
Changes In Seismic Measurements With Blast Induced Fracturin
Changes In The Seismic Properties Of The Cover Produced By L
Crosshole Seismics: Applications In Mining
Geotechnical Mapping By Seismic Imaging In Underground Mines
Experimental Study Of Line Electrode Method To Detect Underg
Time-Dependent Behavior Of Rocks: Laboratory Tests On Hollow
Pillar Sizing
An Applications Approach To Barrier Pillar Design For Improv
Yield Pillar Application Under Strong Roof And Strong Floor
Methods To Determine Pillar Stress Distribution And Its Effe
Correlation Between Unconfined Compressive And Point Load St
Study Of Coal Fragmentation Under Conical Bit Indentation
Development of in-situ stress measurement technique using ul
Understanding the hydraulic pressure cell
Development of a mechanistic model for prediction of maximum
Subsidence prediction using a laminated linear model
Subsidence and environmental impacts in Japanese coal mining
Surface damage due to longwall mining - A case study
Pre-mining stresses at some hard rock mines in the Canadian
Estimation of in-situ material strength
The research on the mechanical properties of hard roof in un
Relationship between the clay fabric of roof shales and roof
Failure mechanisms in ultra-close seam mining
An analysis of roof-pillar-weak floor interaction in partial
Finite element analysis and comparison of shaly mine roof su
Stability analysis and characterization of ground subsidence
Subsidence monitoring at a shallow partial extraction room-a
Assessment of surface fracture depth and intensity due to su
Prediction of surface movement with emphasis on horizontal d
Numerical simulation of coal pillar loading with the aid of
Three-dimensional FEM analysis to sale field measurements fr
Front abutment effects on supplemental support in predriven
Direct determination of failure surfaces in earth slopes
Hydraulic stowing - A solution for subsidence due to undergr
Research on the rational structure of tensible rockbolt and
System behavior analysis of the ground movement around a lon
CISPM - A subsidence prediction model
Dynamic rock anchors
Ropes mine crown pillar rock mechanics
Deformation and failure-time prediction in rock mechanics
Influence of joints on the elastic response of a LFUFL stope
Support selection of mine roadways by means of a computer pr
Theoretical analysis of breaking strength of mine pillars an
A comparison between two- and three-dimensional numerical mo