![]() The structural data sets enable the calibration and verification of numerical models of seal behavior at the 20-psi level, which may then facilitate future structural analyses of seal designs for the new 50- and 120-psi explosion pressure design criteria. The structural data sets include the applied loading on the tested seal represented by a pressure-time curve and, when available, the measured seal response represented by a displacement-time curve. This summary contains data on 52 different structures in the above categories - 44 seals and 8 ventilation stoppings. Articulated structures such as lightweight blocks with or without hitching. To add Tasha's Cauldron of Everything to a new or existing game, add via the Game Details Page. Tasha's Cauldron of Everything includes an interactive puzzle addon. Wood-crib-block seals with or without hitching 6. You can access all of the rules, items, and creatures from Tasha's Cauldron of Everything in the in-app compendium, as well as on the Roll20 web compendium. ![]() Polymer and aggregate materials without hitching 5. Articulated structures such as solid-concrete-block seals and ventilation stoppings made of solid and hollow-core concrete blocks 4. Pumpable cementitious materials of varying compressive strengths with no steel reinforcement and no hitching 3. Concretelike materials with steel reinforcement and reinforcement bar anchorage to rock 2. Although the seals tested were designed to meet the former federal 20-psi pressure design standard, the structural information contained herein on these seal tests will facilitate the analysis and design of coal mine seals that meet the new explosion pressure design criteria of 50 and 120 psi as set forth in the Mine Safety and Health Administration (MSHA)’s final rule on "Sealing of Abandoned Areas." The seal testing data are organized into six broad categories of seal structures based on the materials used and the construction method for those 20-psi seals: 1. This report presents nearly all structural data available from explosion tests of 20-psi mine ventilation seals and concrete-block ventilation stoppings that were conducted by the National Institute for Occupational Safety and Health during 1997-2008.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |