A Case Study for Multiple Seam Calibration of LaModel in Bump Prone Ground

Harris, Kevin W.
Organization: International Conference on Ground Control in Mining
Pages: 5
Publication Date: Jan 1, 2014
Multiple-seam coal mining is a major issue in underground coal mining that adds additional complexity to the practice of ground control. As reserve exploitation is driven by economics, it is now difficult to mine coal without the existence of previous workings above and/or below the active seam; this is particularly true in the Appalachian coalfields. The frequency in which problematic multiple-seam interactions are now encountered has resulted in significant research regarding the underlying mechanisms of the problems and methods of mitigation. In the last few decades, a great deal has been learned about these interactions and the ability to minimize problems associated with these hazards has greatly advanced, resulting in better economics and improved safety. Minimizing the adverse effects of stress interactions often requires a thorough understanding of site-specific geotechnical parameters and previous mining geometry. This is especially evident in bump-prone ground, where pillar behavior is highly dependent on local conditions. This paper presents a case study in a deep cover, Central Appalachian coal mine where three bump events occurred. Initially, empirical design software was used in an effort to analyze the situation and prevent further instability. The empirical study proved ineffective. A detailed investigation of the bump events using the boundary element software LaModel 3.0 was then performed. This study resulted in a site-specific calibration standard that will be applied in numerical pillar design for the remaining reserve.
Full Article Download:
(957 kb)


Additional chapters/articles from the SME-ICGCM book 33rd International Conference on Ground Control in Mining

Development of the 3D Numerical Modeling of Roof Bolts for S
Development and Application of the TT Anti?Friction Washer f
A Comparison Between ARMPS and the New ARMPS?LAM Programs
Multi?stage Testing Procedures, Verification, and Results fo
The Caterpillar HW300 Quickscan
Underground Mining Technology in Chinese Coal Mines
Rock Characterization Using Time - Series Classification Alg
Ground Control in the Underground Coal Mines of Colombia
Investigating the Contributing Factors to Rib Fatalities Thr
Analyses of De-Confinement Mechanisms of Unstable Failures i
Photogrammetric Monitoring of Rock Mass Behavior in Deep Vei
Development of An Enhanced Methodology for Ground Movement P
Estimating Coal Strength Based on Historical Laboratory Test
Experimental Observations and Interpretations on Fracture Ne
Overburden Failure Characteristics of Extra?Thick Seam Using
FlexKnot: An Innovation in Roof and Rib Surface Control
Learning Our Geotechnical Limits and Pushing Our Longwalls T
Three Dimensional Analysis of Strain and Ground Surface Disp
Use of a Plate Loading Device to Quantitatively Evaluate Wea
Ground Control Design Considerations for Reducing Longwall?I
Mechanics of Horizontal Movements Associated with Coal Mine
Roof Geotechnical Properties for Roof Control Purposes in Il
Update: Analysis and Case Study of Impact?Resistant Steel Se
The Implementation of Rock Mechanics Into a Multiple Level L
A Case Study for Multiple Seam Calibration of LaModel in Bum
A Liquid Settlement System for Measuring Roof Sag During Dev
Ground Response As a Longwall Advances Into a Backfilled Rec
A Case Study of a Low Overburden Longwall Recovery with Pre?
To What Extent the Mechanical Properties of Coal Play Role i
Mine Water Vs. Drinking Water?Technical Execution and Legal
Mitigation of a Massive Sandstone Channel?s Impact on Longwa
Study on the Modified Model of Probability Integra Method
Multi?Seam Mining Over Old Workings with Small Pillars - A C
Development of Mechanized Ground Support Installation Equipm
Understanding and Optimizing the Performance of Passive Prim
Validation of Overburden Failure Zone in Complex Extra Thick
The Impact Factors of Overburden Movement in Longwall Mining
Fiber Reinforced Polymer Rockbolts for Ground Control in a S
Introduction of a Measurement Based Ground Control Managemen
Application of Various Probing Methods for Rock Characteriza
Risk Analysis and Risk Ranking in Tunneling: A Case Study
Development of Road Header Roof Bolting Module
Combined Effects of Rock Bedding Orientation and Topography
Challenges of Room and Pillar Mining at 900 M Depths in the
Sandy Creek Waterfall?Case Study of Successful Management of
Overburden Strata Movement for the Longwall Mining of Shallo
Rock Slope Stability Comparison Between Deterministic and Pr
Stability of a Gateroad Used Simultaneously for Two Retreati
Meeting the Challenges of Floor and Sidewall Strata Control
Strata Control Investigations During Fully Mechanized Coal P
Strata Movement Around Large Mining Height Face Area with Fu
A Case Study of Topography?Related Stress Rotation Effects o
Introduction of a New Superior Coating on Ground Support Pro
Suspension Designs Required in the Logical Framework
A Novel and Effective Method to Develop Tension in a Roof Bo
Time Dependent Mining Induced Subsidence Measured by Differe
Tracking and Tracing in Terms of Transportation Logistics of