User Friendly Finite Element Design of Shafts and Tunnels

Details

• Personal Author:
  Larson, Mark K. ; Lawson HE ; Pariseau, W. G.
• Description:
  Rational design based on engineering fundamentals is essential for the layout of safe, stable shafts and tunnels. Shafts and tunnels including winzes, raises, adits, and crosscuts are lifelines to the underground and must be secure. The contribution of this paper describes a significant extension in existing software previously developed for five important design problems in strata-bound mines such as coal, trona, salt, potash, and some large, lead-zinc mines. This extension in software allows analysis to proceed in three easy steps: (1) preparation of a strata properties file, (2) generation of the finite element model, a mesh, and (3) finite element program execution. Circular, elliptical, and rectangular shaft sections are available for a single shaft, twin shafts, and shafts in a row. Spacing of twin shafts and shafts in a row is a free parameter (pillar width). Tunnel shapes are the same as shafts but include the conventional arched back section. Dipping strata of variable thickness, depth and orientation relative to the excavation of choice are allowed. The analyses are three-dimensional. An elasticplastic material model based on associated rules of flow and an N-type yield condition for isotropic, transversely isotropic, or orthotropic rock are used for all strata. Example analyses from several hardrock mines are provided to illustrate the three-step process including mesh plotting and plotting of selected results. The goal of this software is to advance mine design technology for improved miner health and safety. [Description provided by NIOSH]
• Subjects:
  Engineering Mining Occupational Health Safety
• Keywords:
  Coal Mines Longwall Mining Models Pillar Design Pillar Mechanics Underground Mining
• Series:
  Mining Publications
• ISBN:
  9781713863700
• Publisher:
  Society for Mining, Metallurgy & Exploration (SME)
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  OSHA Region 10 ; OSHA Region 8 ; Utah ; Washington
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  SMRD - Spokane Mining Research Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  287-300
• NIOSHTIC Number:
  nn:20067504
• Citation:
  Proceedings of the 41st International Conference on Ground Control in Mining (ICGCM 2022), July 26-28, 2022, Canonsburg, Pennsylvania. Englewood, CO: Society for Mining, Metallurgy & Exploration (SME), 2022 Jul; :287-300
• Federal Fiscal Year:
  2022
• Peer Reviewed:
  False
• Source Full Name:
  Proceedings of the 41st International Conference on Ground Control in Mining (ICGCM 2022), July 26-28, 2022, Canonsburg, Pennsylvania
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:973bb3174b612fcc7d266ace2d0cc78070477155bd8e57e06a745ffb862360760d8cc72feb14fb941948a28eda733d810f8ad2c6b505234301fd4065dc30b7e9
• Download URL:
  https://stacks.cdc.gov/view/cdc/215549/cdc_215549_DS1.pdf
• File Type:
  [PDF - 2.27 MB ]