A Cooperative Study Of Gate Entry Designs Welbeck Colliery (UK) And Jim Walter Resources (USA)

Hendon, Greg
Organization: International Conference on Ground Control in Mining
Pages: 10
Publication Date: Jan 1, 1995
Longwall developments in the UK have historically consisted of single entry gate roads. Adjacent developments were separated from existing panels by large barrier pillars (designed of sufficient width to get away from the longwall abutments of the previous panel) or by small barriers driven in the shadow, or de-stressed zone, of the previous panel. Some 2nd panel tailgates were also driven skin to skin leaving no coal barrier between the newly driven entry and the heavily supported existing gateroad. With the developement and wide acceptance of fully bolted entries and the pressure to reduce production costs, alternatives to single entry drivage, particularly yield pillar developments, were examined. Through the Rock Mechanics Branch of British Coal, a cooperative study was begun with Jim Walter Resources, Inc., USA, (JWR) to look at the yield pillar alternative in detail. This study was to determine the feasibility of utilizing yield pillars in the UK and to determine, through monitoring, the possibility of reducing stable pillar widths at JWR. The study has included extensive monitoring of the yield-stable-yield pillar system at JWR No. 7 Mine and an underground trial of a two entry yield pillar test area at Welbeck Colliery in the UK. This paper describes results from the JWR study and the subsequent results of the first advancing yield pillar development in the UK at Welbeck Colliery.
Full Article Download:
(2855 kb)

Additional chapters/articles from the SME-ICGCM book Proceedings of 14th International Conference on Ground Control in fining

Truss Systems For Longwall Tailgate Support - Update
Cable Support Systems For Longwall Gate Road Stability
Innovative Tailgate Support For Heavy Ground: 11 Left Longwa
Parameters Affecting Resin-Anchored Cable Bolt Performance:
Roof Support Performance In High Stress Conditions
Regional Horizontal Stress And Its Effect On Longwall Mining
Deformation Development Around Mine Roadways And Simulation
Monitoring Mobile Roof Supports
Analysis Of Retreat Mining Pillar Stability
Planning And Design For Barrier Pillar Recovery Three Case H
Influence Of Partings In A Coal Seam On Long Term Pillar Sta
A Cooperative Study Of Gate Entry Designs Welbeck Colliery (
Comparative Case Study Of Yielding And Critical Coal Pillar
Comparison Of Empirical, Analytical, And Numerical Methods O
Nonlinear Approach For Determining Design Criteria For Yield
In-Situ Coal Strength Determination - Case Studies
The Design And Application Of Propsetter? In Underground Coa
Renewed Interest In Prop Supports As A Replacement For Wood
Improved Intersection Design And Monitoring In The Sydney Co
Drivage System In Retreat Longwall Gateroad
Case Study Of Stability Investigations Related To Shallow Un
Analysis Of Rockbolt Performance At The Waste Isolation Pilo
Continuous Improvement In Cuttable Coal Rib Support In Austr
Floor Failure Induced By Lateral Stress Ahead Of Longwall Su
Towards A Method Of Determining Floor Quality In An Undergro
Chinese And North American High-Extraction Underground Coal
Integration Of CAD-Based Mine Planning And Subsidence Engine
Development Of A Subsidence Database And Determination Of Su
Statistical Regional Calibration Of Subsidence Prediction Mo
Subsidence Monitoring Results, Thick Seam Longwall Mining In
Application Of Mechanical And Groundwater-Flow Models To Pre
The Application Of Underground In-Seam Seismic Methods (UISS
Vertical Stress Redistribution Around A Retreating Longwall
Entry Stability Monitoring & Analysis For Longwall & Continu
A Case Study Of A Deformation Mechanism Around A Two-Entry G
Multiseam Mining On South African Collieries
Design And Planning Of Lower Seam Longwall Gateroads
Optimizing Pillar Design In A Multi-Seam Environment