Mapping and Application of Roof Joint Patterns for Ground Control inAn Illinois Mine

Basnett, Kenny D.
Organization: International Conference on Ground Control in Mining
Pages: 6
Publication Date: Jan 1, 2011
An analysis of the Roof Falls Data Base (RFDB) for underground coal mines in Illinois for the period 2004?2008 indicated that about 80% of the roof falls occur at intersections and are associated with geologic anomalies or a rapidly changing geologic environment. Most falls are associated with anomalies such as clay dikes, differential compaction faults, shear zones, joints and fractures, and geologic structure. Therefore, a better analysis of the geology with emphasis on mapping anomalies such as joints and fractures and their application is necessary to improve ground conditions and safety. Such studies within Illinois Coal Basin are limited. This paper presents a mapping study of the joint orientations with documentation of dip of the several lithological units that lie directly above the Herrin No. 6 Coal seam around southern Illinois. These units include the Energy Shale, Anna Shale, and Brereton Limestone. The mapping was done in three mines and the data were plotted on a stereographic projection to determine the average characteristics of joint planes. The study mines included two deep underground mines and one shallow highwall mine. This study has helped identify favorable mining and support orientations in areas of highly variable geology. These are currently under review by the cooperating coal company for experimental roof control studies.
Full Article Download:
(1294 kb)

Additional chapters/articles from the SME-ICGCM book 30th International Conference on Ground Control in Mining

A Study on Geotechnical Risks in Interaction Between Open-Pi
Think Like a Rock
Mapping and Application of Roof Joint Patterns for Ground Co
The Autowarning Telltale: A New Safety Monitoring Device for
Recent Innovations for Slope Development
Analysis of Roof Falls at and Recommendation of Roof Control
The Introduction of Uk Rockbolting Technology into Coal Mine
A Pipeliner's Perspective on Longwall Mining
Why Dead Load Suspension Design for Roadway Roof Support Is
Investigation Into Abnormal Surface Subsidence Above a Longw
Protecting Underground Coal Miners From Rib Falls
MSHA Technical Review of Proposed Mine Designs for U.S.Under
Prediction of Roof Fall Rate in Coal Mines Using Fuzzy Logic
Surface Subsidence Velocity of Fully-Mechanized Thick Seam T
Engineering Geophysics - Mine Subsidence Risk Assessment Stu
A Retrospective on LaModel (Or Dr. Heasley?s Wild Ride)
Safe Pillar Extraction Practice - Some Geotechnical Principl
Case Study of Roof Behaviour and Conditions for Longwall Fac
Early Warning of Longwall Weighting Events and Roof Cavities
Streams and Longwall Coal Mining Subsidence: A Pennsylvania
Surface Structures Impacted By Subsidence From Pennsylvania
GIS Supported Evaluation of Surface Level Impacts Due to Aba
Development and Application of Impact-Resistant Lagging for
Detection and Monitoring of Surface Subsidence Associated wi
Applications of ARMPS (Version 6) to Practical Pillar Design
The Duncan Method of Partial Pillar Extraction at Tasman Min
The Duncan Method of Partial Pillar Extraction at Tasman Min
Geotechnical Considerations for Longwall Top Coal Caving at
Assessment of the Dynamic Loads Effect on Underground Mines
Designing Shotcrete As Primary Support in Tunnels
The Influence of Interface Friction and W/H Ratio on the Vio
Gateroad Support in the Czech and Polish Coal Mining Industr
Study on Eco-Friendly Underground Mining System for Ultra-Th
Ground Control Technology for Mass Exploitation of Coal Depo
The Initial Performance of Commonly Used Primary Support on
Application of Stress, Geologic, and Support Design System (
A Retrospective Assessment of Ground Control Research and Ap
Calculating the Mining-Induced Horizontal Deformation Indice
Understanding the Causes of Roof Control Problems on a Longw
The Technical Progress and Problems to Be Solved of Thick Co
Topography and Coal Seam Initial Stress Estimation: a Sensit
The Effects of Longwall Coal Mining on the Hydrogeology of S
Application of Yield-Lok Bolt for Bursting and Convergence G
Research on Mine Pessure Behaviors and Overlying Strata Move
Preventing Roof Fall Accidents - An Operation's Approac
Roof Bolting for Long-Term Entries in Underground Coal Mines
Numerical Modeling of the Pillar Confinement with Backfillin