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Mining Product: AHSM - Analysis of Horizontal Stress Effects in Mining
Keywords: Crosscuts Entries Entry design Horizontal stress Longwall mining
Original creation date: April 2003
Authors: NIOSH
Software (Windows) - August 2013
Version: 2.4.04
Download (15.79)
Pittsburgh, PA: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, 2013 Aug
AHSM is a software program for improving mine layouts for control of horizontal stress.
The download file is a self-extracting executable which will automatically run a setup program.
It is now widely accepted that horizontal stress is present nearly everywhere underground. Often it is more severe than the vertical stress. It is a major cause of roof control problems in underground mines.
Horizontal stress is generally more intense in some directions than others, so its effects can be minimized with proper entry orientation. AHSM contains two modules to improve mine layouts for control of horizontal stress. For development, the user specifies the orientations of the entries, the crosscuts, and the maximum horizontal stress. Angled crosscuts may be used, and the angles may be different for the right- and left-hand crosscuts. If site-specific stress measurements are not available, a drop-down menu allows the user to select from a menu of regional stress orientations. AHSM then shows the how the stress condition would vary as the entry and crosscut orientations are changed.
The second module is for longwall mining. Severe stress concentrations can make headgate conditions hazardous when the entries are improperly oriented. AHSM shows whether a particular longwall orientation and sequence of panel recovery places the headgate corner in a stress concentration or in stress relief. AHSM also estimates the magnitude of the stress concentration.
**Release notes for version 2.4.04 (August 2013):**
Minor bug fixes
Fixed operating system compatibility issues
User interface improvements
**Release notes for version 2.4.01 (October 2012):**
Recompiled with new libraries
16/32 bit controls have been replaced with 32/64 bit controls
User interface improvements
Program installer has been updated with more options and better checks for older installations
Various bug fixes
Tested for better functioning under Windows 7.
Audience: Mine operators
Software (Windows) - August 2013
Version: 2.4.04
Download (15.79)
Pittsburgh, PA: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, 2013 Aug
See Also
Analysis of Global and Local Stress Changes in a Longwall Gateroad
Degasification System Selection for U.S. Longwall Mines Using an Expert Classification System
Empirical Guidelines for Longwall Ground Control Design
Evaluation of the Impact of Standing Support on Ground Behavior in Longwall Tailgates
Ground Control Overview
Horizontal Stress
Horizontal Stress and Longwall Headgate Ground Control
Modeling and Prediction of Ventilation Methane Emissions of U.S. Longwall Mines Using Supervised Artificial Neural Networks
Overview of Coal Mine Ground Control Issues in the Illinois Basin
Performance of Roof Support Under High Stress in a U.S. Coal Mine
Rock Mechanics Study of Lateral Destressing for the Advance-and-Relieve Mining Method
Stress Measurements for Safety Decisions in Longwall Coal
Technology News 504 - NIOSH Releases New AHSEM and ARBS Software Programs to Improve Ground Control
Technology News 517 - New Updates for NIOSH Coal Mine Ground Control Software
Page last reviewed: October 22, 2016
Page last updated: October 30, 2013
Content source: National Institute for Occupational Safety and Health, Mining Program
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