Truss Bolting On-Cycle in Jane Mine Lower Freeport Seam

Barish, Ken
Organization: International Conference on Ground Control in Mining
Pages: 10
Publication Date: Jan 1, 1984
Jane Mine of the Keystone Coal Mining Corporation was started in 1962 and is in the Lower Freeport seas located in Armstrong County, Pennsylvania, approximately 45 miles northeast of Pittsburgh. The mine is a slope/shaft complex with the cover ranging from 100 feet at the slope to 450 feet near the back end of the property. The seam height ranges from 48 to 72 inches. A variety of roof conditions have been enĀ¬countered, and an equal variety of roof control systems have been tried with varying degrees of success. Initially, places could be mined as deep as 100 feet without any permanent roof support. After several problems and the advent of the Health and Safety Act of 1969, roof control became more and more prevalent and predominant at the Jane Mine. It started with 4 foot conventional oolts. As the mine progressed in the northeasterly direction, roof conditions changed from the extremely good roof that was encountered initially, to bad roof; and other types of roof support were required. Sixty pound rails and 6 inch 25 pound to the foot steel I-beams were used for supplemental support in long life headings such as belt and track. Resin bolting was done in many areas for long life support due to the deterioration of the shale roof over time. Several areas had to be abandoned because of uncontrollable top.
Full Article Download:
(3150 kb)

Additional chapters/articles from the SME-ICGCM book Proceeding of the Fourth Conference on Ground Control in Mining (ICGCM)

Truss Bolting On-Cycle in Jane Mine Lower Freeport Seam
Design Of A Roof Truss Bolting Plan For Bear Mine
Tension-Torque Relationship For Mechanical Anchored Roof Bol
A Novel System For Automatic Installation Of Cement Grouted
Load Transfer Mechanics In Fully-Grouted Roof Bolts
An Investigation Of Longwall Pillar Stress History
Impact Of Horizontal Load On Shield Supports
Interaction Between Roof And Support On Longwall Faces With
Roof Control With Polyurethane For Recovery Of Kitt Energy?s
First Caving And Its Effects--A Case Study
Staubbekampfung An Schildausbau In Bruchbaustreben (Combatin
Yield Pillar Applications--Impact On Strata Control And Coal
Constraint Is The Prime Variable In Pillar Strength
Massive Pillar Failure--Two Case Studies
Investigations Of Underground Coal Mine Bursts
Destressing Practice In Rockburst-Prone Ground
Statistical Characterization Of Coal-Mine Roof Failure: Sugg
Pillar Design - Continuous Miner Butt Section And Longwall D
Design Factors In Near-Seam Interaction
Remote Sensing For Roof Control And Mine Planning: An Overvi
Design, Construction And Performance Of A Single Pass Lining
Computer Modelling And In Situ Instrumentation Techniques: A
A Sonic Wave Attenuation Technique For Monitoring Of Stress
The Radio Imaging Method (RIM) -- A Means Of Detecting And I
Clay Veins: Their Physical Characteristics. Prediction, and
Evaluation of the Point Load Strength for Soft Rock Classifi
Ground Control Experiences in a High Horizontal Stress Field
Horizontal Stresses and Their Impact on Roof Stability at th
Ground Control Problem Associated with Longwall Mining of De
Geotechnical Aspects of Subsidence over Room and Pillar Mine
Proposed Criteria for Assessing Subsidence Damage to Surface
Surface Subsidence. in Longwall Mining--A Case Stud
An Integrated Approach to the Monitoring and Modeling of Gro