Rock Mechanics Issues In The Trona Patch

Richardson, Archie
Organization: International Conference on Ground Control in Mining
Pages: 8
Publication Date: Jan 1, 1999
The trona mines in the Green River Basin, commonly known as the "trona patch," present an interesting set of rock mechanics issues stemming from mining in a unique underground environment. Like other minerals occurring in tabular deposits, trona is mined using high-productivity room-and-pillar and longwall methods. However, trona does not behave quite like other evaporites and behaves far differently than coal. In this paper, the following key issues in trona patch rock mechanics are discussed: material properties, in situ stress field, water and gas pressure effects, creep characteristics, pillar behavior, roof span stability, floor stability, underground tailings storage, longwall mining, two-seam mining. and solution mining. Many of the existing trona producers are entering potentially more difficult mining conditions, and much consideration is being given to "new" technologies such as longwall mining and solution mining. In analyzing 20 years of experience with trona patch rock mechanics issues the authors have identified key comparisons and contrasts with conventional tabular deposit rock mechanics that will help illuminate what has been learned as the trona patch enters the 21" century.
Full Article Download:
(2112 kb)


Additional chapters/articles from the SME-ICGCM book Proceedings - 18th International Conference on Ground Control in Mining

Pillar Collapse at Welgedacht Colliery, South Africa: A Case
Causes of Massive Directional Roof Falls in Room and Pillar
Catastrophic Collapse Of Highwall Web Pillars And Preventati
Mine Panel Collapse - Two Case Studies
Roof Geology Mapping In Underground Coal Mines
Electromagnetic Seam Wave Mapping Of Roof Rock Conditions Ac
Geological Conditions At Continuous Miner Sections; Examples
The Role Of Engineering And Geology In Analyzing Ground Cont
The Development And Use Of Risk Assessment Techniques To Ass
Time-Dependent Analysis Of Underground Opening Stability
Tekflex As A Sprayon Screen Replacement In An Underground Ha
Tunnel Deformation Monitoring "Action Levels" In Coal Mines
Skin Failure Of Roof And Rib In Underground Coal Mines
Application Of Polyurethane Injection For Rehabilitation Of
Design Considerations For Bump-Prone Longwall Mines
Design Methodology For Standing Secondary Roof Support In Lo
Modern Shield Technology: Better Than Ever But Still Not Per
Shield Monitoring To Forecast Severe Face Weightings At The
Monitoring Of Longwall Seal Behaviour For Permeability And S
Ground Control In South African Coal Mines - A U.S. Perspect
Rock Mechanics Issues In The Trona Patch
Highwall Augering In Ultra-Thick Western Coal Reserves: Uniq
Seismic Events Due To Underground Mining Activities
Control Technology For Roof Drill Operators
Resin Annulus Size Effects On Rebar Bolt Pull Strength And R
Roof Bolt Response To Shear Stress: Laboratory Analysis
Laboratory Study Of Shear Loading And Bolt Load Transfer Mec
Analysis Of Cable Bolt Performance Using Numerical Modeling
Roof Bolting Application In Longwall Mining In Indonesia And
Ground Control Design For Multiple Seam Mining Using Finite
Pillar Design Issues For Underground Stone Mines
Calibration Of The Analysis Of Longwall Pillar Stability (AL
Mine Convergence When Using Mobile Roof Supports In Pillar R
The Advance And Relieve Mining Method: A Horizontal Stress C
Localized Horizontal Stress And Its Effect On Ground Control
Prediction And Control Of Surface Subsidence Over Abandoned
Effects Of Mining On Underground Infrastructures In The Germ
Ground Deformation In The Case Of Underground Mining Of Thic
Prevention Of Time-Dependent Subsidence By Elimination Of Gr