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Results 1 - 10 of 26
7/1/2010 - Conference papersThis paper makes use of numerical models to examine the interaction between typical pillar systems and the surrounding rock mass for weak and strong geological conditions at various spans and depths of cover.
2/1/2005 - Conference papersHighwall stability remains a major concern during highwall mining. Geologic structure (hillseams) and pillar stability are the two major factors affecting highwall stability.
Advance and Relieve Mining: A Method to Mitigate the Effects of High Horizontal Stress on the Mine Roof2/1/2001 - Conference papersEvaluation of the "Advance and Relieve" mining method is described to determine effectiveness for conditions where high horizontal stresses caused long running roof falls resulting in hazardous conditions and the premature abandonment of panels.
Utilizing the 'Advance and Relieve' Method to Reduce Horizontal Stress Affects on the Mine Roof, A Case Study1/1/2000 - Conference papersThe practical application of the "advance and relieve" method is discussed. A trial of the method was conducted for a room and pillar coal operation that was experiencing roof cutters and long running roof falls caused by high horizontal stresses.
7/1/2009 - Conference papersThis study extends the method of dynamic analysis to events driven by slip on geologic features.
7/1/2009 - Conference papersThis paper provides an overview of current deep cover pillar recovery practice.
7/1/2008 - Conference papersThis paper examines catastrophic failures of evaporite mines (including salt, potash and trona) that show that violent failure does, in fact, occur and attempts to identify common factors and characterize the mechanism of failure.
A unique circumstance created by monitoring a pre-driven longwall recovery room permitted measuring the stresses of a coal pillar throughout its entire life cycle in less than a week. The complete transformation took place in less than 12 hours.
Effects of Weak Bands on Pillar Stability in Stone Mines: Field Observations and Numerical Model AssessmentObservations of pillar conditions in limestone mines showed that the presence of weak bands in the limestone can result in pillar damage. This study investigated the mechanism of failure caused by the presence of weak bands using numerical models.
Evaluation of the Effects of Length on Strength of Slender Pillars in Limestone Mines Using Numerical ModelingNumerical modeling is used to evaluate the degree the pillar strength is increased with a rectangular pillar over a square pillar.