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Techniques for Constructing Concrete Block Stoppings.
MISSING :29 pages
The Bureau of Mines has evaluated several techniques that will enhance the airtightness of concrete block permanent stoppings used in mines for airflow control. These techniques have been combined to create three distinct stopping types, each with its own utility. This handbook describes the three types of stoppings and includes illustrated step-by-step instructions for their construction.
Page last reviewed: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division