Shale Gas Well Stability Under the Influence of Underground Longwall Coal Mining

Details

• Personal Author:
  Dougherty H ; Kimutis R ; Su, Daniel W. H. ; Van Dyke M ; Zhang P
• Description:
  This paper presents the results of a unique study conducted by CDC/NIOSH/PMRD from 2016 to 2020 to evaluate the effects of longwall-induced subsurface deformations on shale gas well casing integrity and underground miner safety and health. Results from the NIOSH instrumentation sites are compared to the results from a previous study by the coal and gas industries, which clearly indicate that under shallow and medium covers, the measured horizontal displacements within the abutment pillar are one order of magnitude higher than those measured under deep cover. Detailed evaluations of the 1957 PADEP Gas Well Pillar Regulation, which has been used by MSHA and seven other states, indicate that the regulation can be applied to longwall mining if the depth of cover is less than 750 feet. Preliminary guidelines on longwall-induced deformations, casing and cementing alternatives, and gas well setback distances under chain pillar and barrier pillar scenarios are proposed. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Safety
• Keywords:
  Ground Stability Longwall Mining Mine Gases Pillar Mechanics Underground Mining
• Series:
  Mining Publications
• Publisher:
  Society for Mining, Metallurgy and Exploration (SME)
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  Colorado ; OSHA Region 3 ; OSHA Region 8 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PMRD - Pittsburgh Mining Research Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-6
• NIOSHTIC Number:
  nn:20063502
• Citation:
  MineXchange: 2021 SME Annual Conference and Expo and CMA 123rd National Western Mining Conference, March 1-5, 2021, virtual event, preprint 21-014. Englewood, CO: Society for Mining, Metallurgy & Exploration, 2021 Mar; :1-6
• Federal Fiscal Year:
  2021
• Peer Reviewed:
  False
• Source Full Name:
  MineXchange: 2021 SME Annual Conference and Expo and CMA 123rd National Western Mining Conference, March 1-5, 2021, virtual event, preprint 21-014
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:45e66c0990bee16b0bac914e58e2937803efa2c49acc261f62374c83481f164ba33eeedea50ad4aa65e8dbaadc60cd857dfdfba87fb2479dd3e56d9c9512697e
• Download URL:
  https://stacks.cdc.gov/view/cdc/215404/cdc_215404_DS1.pdf
• File Type:
  [PDF - 952.08 KB ]