Device for roof support of underground mine/tunnel
AssigneeCouncil of Scientific and Industrial Research
InventorsSudhir Kumar Kashyap, Amalendu Sinha
Life of this patent
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Abstract
The present invention provides a device useful for supporting underground mine/tunnels. The device continuously monitors the roof load coming over the canopy and correspondingly yielding/convergence indicated by the pointer on graduate scale. The roof load coming on the canopy (9) is transmitted to the prop via a set of steel disc springs (5) to increase the yielding and longevity of the present device. The present invention has mechanism for preloading upto the desired load. It is a simple, easily transportable and user friendly device having quick release mechanism from a safe distance.
Claims7
A device for roof support of underground mine/tunnel, comprising in combination a top tubular element (1) being inserted telescopically in a bottom tubular element (2) by means of a lock nut (6) and a load setting clamp (7);
- wherein the top portion of the said top tubular element being attached to a spring holding element (3) having a disc spring (5), a pointer (13) being attached at the top of the said disc spring to indicate the load, a square section canopy (9) being coaxially placed at the top of the said spring holding element to bear the load, a detachable holding clamp (4) having remote release mechanism being provided at the bottom of the said top tubular element by means of a long handle (11) and a detachable jack setting clamp (10) being provided at the top of the said bottom tubular element;
- wherein twin jacks (8) being provided between the said clamps (7 & 10) to lift the top tubular element during the operation.
Dependencies are inferred from the claim text.