Objective
In mines where fire is a hazard the construction of explosion-proof stoppings may be necessary to isolate the district affected if the fire cannot be controlled by other means. The operation of construction is not without risk. The aim of this project was to provide means for a stopping to be constructed in less than eight hours for level roadways (<40 degrees) and steeply inclined roadways (>60 degrees).
These latter roads are known as 'tubbings' because they are built up from metal tubbing rings with diameters of 2.20 m for intake airways and 1.70 m for return airways. They give access to the seam and enable the face to be worked to the rise and the waste to be stowed. The gradient of the 'tubbings' varies from 60 degrees to 90 degrees.
Topic(s)
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France