An anchor cable retracting device

Abstract

The invention relates to the technical field of mine support engineering, in particular to an anchor cable withdrawal device, comprising a cylinder body, a piston is arranged in the cylinder body, one end of the piston protrudes from the cylinder body, and the piston and The cylinder is movably connected, and the power unit provides power for the axial movement of the piston relative to the cylinder; the end of the cylinder protruding from the piston is connected with a grasping unit, and the grasping unit can It moves synchronously with the cylinder; the grasping unit grasps the anchor plug, and one end of the piston protrudes from the cylinder against the anchor cup, and the piston, the cylinder and the grasping unit The relative movement disengages the anchor plug from the anchor cup. The anchor cable withdrawal device provided by the invention can make the roof of the roadway advance with the mining face and fall down in time, so as to perform fast and efficient anchor withdrawal work.

Description

technical field [0001] The invention relates to the technical field of mine support engineering, in particular to an anchor cable retracting device, and more particularly to an anchor cable retracting device capable of enabling the roadway roof to advance with the mining face and fall in time. Background technique [0002] At present, although mine cable bolt back windlass machine is widely used, existing anchor cable bolt back windlass still has some inconveniences in the production and application of each coal mine. [0003] 1. Low reliability [0004] When withdrawing the anchor, during the pressurization process, the separation of the anchor ring and the anchor plug of the anchorage is the criterion for judging whether to continue to pressurize. If the separation occurs, stop the pressurization. If there is no separation, the manual pump will continue to pressurize. . However, the staff of the prior art usually rely on personal work experience to judge whether the anch...

AI Technical Summary

Problems solved by technology

However, the staff of the prior art usually rely on personal work experience to judge whether the anchor plug and the anchor ring are separated and whether to continue to pressurize to complete, which will inevitably lead to low pressurization accuracy, and too much or too little pressurization will Bring certain difficulties and dangers to the anchor withdrawal work

If the pressure is too small, it is difficult to remove the anchor plug from the anchor ring; if the pressure is too large accidentally, the tension on the anchor cable steel strand exceeds the design bearing capacity of the anchor cable, and the anchor cable may be broken. pull bad

[0005] 2. High labor intensity and high labor demand

[0006] Since the anchor cables are all distributed on the roof of the roadway, the anchor jack needs to be brought to the top of the roadway to connect with the steel strand when withdrawing the anchor. However, due to the height, the staff must carry a ladder with them during the anchor withdrawal process It is necessary to carry out the work of withdrawing the anchor, which must bring additional and greater work intensity to the staff

And due to the actual environment of the roadway, another staff member is needed to support when using the ladder, so the whole anchor withdrawal process needs at least three staff members to complete

Occupy the labor force, increase the production cost of the coal mining enterprise, and reduce the benefit

[0007] 3. There is a certain risk

[0008] In the process of anchor withdrawal and pressurization, the anchor plug needs to be removed manually, which is dangerous. In addition, during the entire process of anchor withdrawal and pressurization, the staff needs to climb the ladder repeatedly to judge whether to continue to pressurize, and the The anchor needs to be removed, so repeated climbing of the ladder will also pose a threat to the personal safety of the staff

[0009] To sum up, in view of the fact that the roof of the roadway cannot fall in time with the advance of the mining face under the combined support of the anchor, net and cable in the current underground coal caving face and the mining roadway, such as: the initial collapse of the working face The distance is increased; the large-scale suspended roof behind the upper and lower ends of the working face causes gas accumulation in the triangle area of ​​the suspended roof, which seriously affects the ventilation safety; the roadway roof does not fall, which increases the length of the suspended roof and causes difficulties in the management of the end roof For a series of problems, it is necessary to develop a fast and efficient anchor cable withdrawal device

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