Results 71 - 80 of 86

• Rock Mechanics Study of Shaft Stability and Pillar Mining, Homestake Mine, Lead, SD (In Three Parts): 2. Mine Measurements and Confirmation of Premining Results
  5/1/1995 - Reports of Investigations
  A U.S. Bureau of Mines case study of pillar recovery in high-grade ore near the Ross shaft at the Homestake Mine, Lead, SD, has demonstrated the usefulness of the finite-element method for evaluating shaft pillar mining plans and shaft stability. This r...
• Pillar Design and Strategies for Retreat Mining
  1/1/1994 - NIOSH/USBM numbered publications
  A computer program called Analysis of Retreat Mining Pillar Stability (ARMPS) is field tested and refined in order to estimate abutment pressures developed during pillaring. It can be successfully employed to predict pillar line stability.
• Thermal Modeling of Portable Power Cables
  1/1/1993 - Reports of Investigations
  The U.S. Bureau of Mines investigated the performance of portable power cables under transient conditions. This research had a twofold purpose: (1) to define the thermal characteristics of electrically overloaded trailing cables, and (2) to conceptuali...
• Probability of Making a Successful Mine Escape While Wearing a Self-Contained Self-Rescuer
  12/1/1992 - Peer reviewed journal articles
  This Bureau of Mines report examines survival odds for a prototypical escape from a mine, and illustrates how these odds change when SCSR training is improved.
• Calculation of Vertical Stress Exerted by Topographic Features
  1/1/1992 - Reports of Investigations
  The Bureau of Mines developed a computerized method to calculate vertical stress exerted on surfaces at depth that includes the effect or topography. The limitation of the method is that stresses cannot be accurately determined near an outcrop.
• MULSIM/NL Application and Practitioner's Manual
  1/1/1992 - Information Circulars
  MULSIM/NL is a U.S. Bureau of Mines boundary-element-method program for calculating stresses and displacements in coal mines or thin, tabular metalliferous veins. This manual gives detailed operating instructions for MULSIM/NL and illustrates its use w...
• MULSIM/NL Theoretical and Programmer's Manual
  1/1/1992 - Information Circulars
  The program described in this U.S. Bureau of Mines report is part of the MULSIM/NL package, which features the actual BEM program described herein, as well as a preprocessor program called MULPRE/NL and a plotting postprocessor program called MULPLT/NL.
• Probability of Making a Successful Mine Escape While Wearing a Self-Contained Self-Rescuer - A Computer Simulation
  1/1/1990 - Reports of Investigations
  In an effort to estimate the chances of a miner making a successful escape while wearing a self-contained self rescuer (SCSR), a computer simulation was developed.
• Physiological Responses and Subjective Discomfort of Simulated Whole-Body Vibration From a Mobile Underground Mining Machine
  10/1/1988 - Conference papers
  Eight men participated in a pilot study to evaluate the effects of shock and whole-body vibration (WBV) on heart rate (HR), blood pressure (BP), and subjective discomfort.
• Evaluation of Mine Illumination Systems Using Numerical Modeling
  10/1/1978 - Conference papers
  The analysis of a machine-luminaire configuration is well suited to computer analysis; the incident light levels can be calculated at the required set of points. This paper presents a description of the techniques involved in this simulation.