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Company Profile . ELBROC Mining Products (Pty) Ltd is a recognized leading manufacturer and supplier of In-Stope Roof Support Products to the Mining Industry. This Gauteng based ISO 9001 facility provides patented propriety products with capabilities covering design, development, machining, fabrication, assembly and testing. Mechanical and Hydraulic Props that are used as Sacial or ...

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Mar 03, 2008· The hydraulic prop is placed perpendicular to the coal seam and the test is carried out by increasing the pressure of the prop with a hydraulic pump. Settlement is measured using two comparative meters placed on a tripod that is assumed to be solidly joined to the three support props closest to the test point.

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ANNUAL of the University of Mining and Geology "St. Ivan Rilski", Vol. 53, Part 1 1 1, Mechanization, electrification and automation in mines, 2010 STUDY ON THE SAFETY VALVES FOR THE HYDRAULIC PROPS ON THE ROOF SUPPORTS USED DURING COAL MINING Sorin V tavu 1, Niculina V tavu 2

Chocks | Introduction | underground COAL

Equipment Chocks (also known as "Powered Supports", "Supports" or "Shields") Roof support in early longwalls (in the days of hand mining) was by timber props and bars, withdrawn from the goaf side as the faces advanced and re-used if still intact.

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