hydraulic prop

hydraulic prop

[hi′drȯ·lik ′präp]
(mining engineering)
A supporting device consisting of two telescoping steel cylinders extended by hydraulic pressure provided by a built-in hand pump.
References in periodicals archive ?
The diagrams in the sidebar on the opposite page show how a typical non-feathering hydraulic prop uses engine oil from the propeller governor to change the blades' position when increasing, decreasing or maintaining a pitch setting.
Contract notice: Delivery of individual hydraulic props for branches of the polish group mining sp.
Both single-ended and double-ended ranging drum shearers, ploughs with hydraulic props, friction props, etc.
The water powers hydraulic rock drills and water-jetting guns for assisting stope cleaning, sets hydraulic props, and operates blasthole flushing equipment and ancillary devices.
Contract award notice: the contract is for the supply of mines jsw sa hydraulic props with a maturity of 12 months from the date of the agreement.
Rapid yielding hydraulic props were first implemented in the late 1960s as a support system designed to accommodate the rapid convergence of the hanging and footwalls which occurs during a rockburst, while still providing the required support.
Contract notice: The contract is for the supply of mines jsw sa hydraulic props with a maturity of 12 months from the date of the agreement.
Contract notice: Delivery individual hydraulic props for branch coal company sa in 2016.
Contract award: the contract is for the supply to the mines of jsw sa hydraulic props and parts of hydraulic props with maturity of 12 months from the date of the agreement.
Contract notice: The contract is for the supply to the mines of jsw sa hydraulic props and parts of hydraulic props with maturity of 12 months from the date of the contract.
Contract award: delivery of the individual hydraulic props for branch coal company in 2015.
Tenders are invited for Hydraulic Props Supply Circuit Open Individually Equipped with Fan