Use Of Polymer Grids For Longwall Shield Recovery

Travis, Brian E.
Organization: International Conference on Ground Control in Mining
Pages: 7
Publication Date: Jan 1, 1990
The recent development of polymer grids for the underground coal mining industry has created new alternatives for supplemental ground control practices. The grids utilize strong, lightweight polymers - usually special grades of polypropylene. High tensile strengths and resulting load support characteristics are achieved by molecular orientation of these polymers in the manufacturing process. One of the most important applications of polymer grids as supplemental ground control is in longwall shield recovery. When shields are moved from one face to another, the determining factor in the success of the recovery is the ground control provided by roof support structures along the old face. Whereas primary support is usually provided by roof bolts and cables which run the full width of the panel, supplemental support is often provided by metallic meshes of welded wire or chain-link fence. lightweight, high-strength polymer grids replace these heavy, cumbersome metallic meshes, giving the operation increased productivity by decreasing installation time and reducing injury downtime.
Full Article Download:
(1345 kb)


Additional chapters/articles from the SME-ICGCM book Tenth International Conference on Ground Control in Mining Proceedings (ICGCM) 10th

Practical Aspects Of Longwall Pillar Design
Assessment Of Underground Structural Design
Load And Convergence Measurements In Longwall Faces And Desi
A Model Of Shield-Strata Interaction And Its Implications Fo
Stability Of Interpanel-Pillar And Deformation Of Gateroad D
Use Of Polymer Grids For Longwall Shield Recovery
Methods Of Controlling Thick And Strong Roof In Longwall Min
Tensioned Point Anchor Resin System Versus Non-Tensioned Ful
Thrust Bolting: A New Innovation In Coal Mine Roof Support
An Alternative To A Manual Torque Check On Roof Bolts
Shear Bond Stresses Along Cable Bolts
An Underground Trial Of Cable Slings For Remedial Support Of
Mobile Roof Support For Retreat Mining
Application Of Time Domain Reflectometry To Ground Control
An Examination Of Energy Calculations Applied To Coal Bump P
Delineation Of Abandoned Workings With An In-Seam Seismic Me
Remote Detection Of Abandoned Mine Workings Using Radio Imag
Effects Of Surface Topography On The Stability Of Coal Mine
Site Characterization For Ultra-Close Multi-Seam Mining
Mining Under Rivers In Fuxin Coal Mines
Use Of Database In Ground Control To Identify Weightings And
Integrating Ground Control And Mine Site Data Through A Geog
Determination Of The Rock Strength From Portable Rock Tester
Mine-Wide Physical Property Trend Identification Using Porta
Subsidence Prediction In Illinois Coal Basin
Determination Of The Stopline Subsidence Profile Of Phalen 2
Evaluation Of Subsidence Parameters For Inclined Seams In UK
Measurement Of Structural Deformation And Tilt During Subsid
Drag Picks - Influence Of Tool Geometry And Angle Of Arrack
Roof Sounding Device - A Loose Rock Detector
Advanced Surveying Method For Measuring Roof Convergence
Geomechanical Substantiation Of Extraction Of Undermined Ore
Relationship Between Floor Rock Stress And Floor Failure
The Influence Of Geomining Parameters Over Stress Distributi
Finite Element Modeling Of Subsidence Induced By Underground
The Structural Response Of A Steel Lattice Transmission Towe