Development Of Stress Measurement Techniques In Bump-Prone Coal For Safety Decisions

Zahl, Eric G.
Organization: International Conference on Ground Control in Mining
Pages: 11
Publication Date: Jan 1, 2000
Researchers at the Spokane Research Laboratory of the National institute for Occupational Safety and health are evaluating stress and displacement measurements in a longwall coal mine. The objective is to determine the best indicators of coal bump hazards during operations so that mine foremen and technical stall can make more informed intervention decisions to protect miners from coal bumps. Instruments were clustered in two panels, a yield pillar, and the immediate roof and floor of a two-entry longwall coal mine. Data were gathered continuously from a variety of instruments as mining proceeded toward and past the instrument cluster. Researchers and the mine's technical staff evaluated these data with respect to coal bumps and bump mechanisms. Selected graphs were then presented to mine foremen on a periodic basis to test their usefulness in identifying hazards. Of particular interest was the use of horizontal stress data from the immediate roof. To measure changes in horizontal stress, a new technique was devel┬Čoped for installing a grouted biaxial stressmeter in the roof. An evaluation of the development of this stress monitoring system in producing data beneficial to mine foremen is presented.
Full Article Download:
(2889 kb)


Additional chapters/articles from the SME-ICGCM book Proceedings 19th International Conference On Ground Control In Mining

An Approach To Identifying Geological Properties From Roof B
Field Experience Of Measuring The Acoustic Energy From A Ham
Advancements In Reflective Seismic Tomography For The Locati
Longwall Geomechanics, An Australian Perspective
Moonee Colliery: Renewing The Economic Viability Of A Mine U
Successful Application Of Hydraulic Fracturing To Control Wi
Pillar Mining And Longwalling Below Massive Roof Strata: Geo
High Capacity Tensioned Cable Bolts For Tailgate Support
Single Point And Full Scale Laboratory Testing Of Timber Cho
Optimizing Secondary Roof Support With The NIOSH Support Tec
The Use Of Cribless Tailgates In Longwall Extraction
Five Stress Factors Conducive To Bumps In Utah, USA, Coal Mi
Development Of Stress Measurement Techniques In Bump-Prone C
Coal Mine Seismicity And Bumps: Historical Case Studies And
Multi-Scale Assessment Of Coal And Gas Outbursts Based On Fr
Horizontal Stress: The Root Of All Evil?
Utilizing The ?Advance And Relieve? Method To Reduce Horizon
Regional Horizontal Surface Displacements Due To Mining Bene
Prognosis And Control Of Mining Induced Surface Subsidence A
Prediction Of Subsurface Subsidence For Longwall Mining Oper
Development Of A Statistical Technique For Assessing Sandsto
Evaluation Of Surface Subsidence Potential Along A Pipeline
Roof Monitoring In Limestone Mines-Experience With The Roof
Site Characterization For Planning Underground Stone Mines
Potential Problems Related To Mining Under Or Adjacent To Fl
Mine Planning For Longwall And Pillar Retreat Panels Subject
Optimization Of District-Wide Mine Layout In Multi-Seam Mini
Application Of Bolt Design Criteria At Galatia Mine
The Utilization Of Rockbolting Technology And Monitoring Tec
Rockbolting For Highly Stressed Roadways
Evaluation Of Measurement System For Monitoring The Stabilit
Quality Management For Grouted Rockbolts
Evaluating Anchorage Mechanisms Of Fully Encapsulated Rock B
INSTáL CableOx: A New Tensionable & Corrosion Resistant Cabl
Rock Reinforcement Longevity
Progress In The Development Of A Roof Bolt Design Methodolog
Case Studies Of Progressive Pillar Failure In Two Mines Usin
Jointing Effects On Pillar Strength
Impact Of Vertical Stress On Roadway Conditions At Dartbrook
Stepwise Support Technology For Extremely Soft Rock Roadway
Mobile Roof Supports For Pillar Retreat Mining
Three-Dimensional Simulations Of The Roof Behavior In Coal R
Roof Behavior In South African Coal Room And Pillar Panels
Extended Cut Out Distances In Continuous Miner Sections In S
Roof Control Analysis In North River Mine
Analysis Of The Seam Inclination Effect On Roof Stability
The Application Of Rock Mass Classification Principles To Co
Mining Geotechnical Benchmarking
Using The Point Load Test To Determine The Uniaxial Compress
The Influence Of Water Content On Strength Characteristic Of
Polymer Membrane Liners In Underground Coal Mines - Ground C
Applications Of Cement Grouting Method For Controlling Weak
Analysis Of Safety Aspects And Mining Practices For Effectiv