Plastic tube for transporting powder or granular explosives for underground mining for extracting underground mineral salt, comprises inner surface which is provided with tube direction extending V-shaped grooves

摘要

The plastic tube (3) comprises inner surface (4) which is provided with tube direction extending grooves (5) for transporting powder or granular explosives. The groove is formed in V-shape. The depth (t) of the groove is 0.1-1.0mm and the width (B) of the groove is 0.2-1.0mm. The plastic tube is made of PVC or carbon black material where the internal diameter (D) of the plastic tube is 10-40mm and wall thickness (d) of the plastic tube is 1-5mm.