Anchor cable supporting force detection device and method

Abstract

The invention discloses an anchor cable supporting force detection device and method. The detection device comprises a pressure gauge, a counter-force cover and an anchor cable tensioning machine tool. A to-be-tested anchor cable, an anchor cable tray and an anchor cable lock are surrounded and protected through the counter-force cover; the recoil force of an anchor cable drawing device acts on the counter-force cover, the situation that the detection result cannot truly reflect the actual supporting force of the anchor cable due to the influence of the recoil force is avoided, and the supporting force of the anchor cable can be rapidly and effectively detected while the normal drawing of the anchor cable is guaranteed; meanwhile, the pressure gauge is used for providing a judgment value for detecting the anchor cable supporting force; the tensioning of the anchor cable is stopped immediately when the numerical value of the pressure gauge changes, the anchoring structure of the to-be-detected anchor cable is not damaged to cause failure of the anchor cable while the supporting force is detected, the supporting force of the anchor cable can be detected quickly and effectively, and reliable data support is provided for the stable control of a roadway surrounding rock.

Description

【Technical field】 [0001] The invention belongs to the technical field of roadway support in underground engineering, and in particular relates to an anchor cable support force detection device and an anchor cable support force detection method. 【Background technique】 [0002] With the gradual depletion of shallow coal resources, coal mining has gradually shifted to the deep, and the mechanical environment of the surrounding rock of the roadway has become increasingly complex. Seriously. As a commonly used support method, anchor cable support plays a vital role. [0003] The anchor cable support shows the following advantages in the actual coal mine roadway support: the anchor cable has a large bearing capacity, and a single anchor cable can provide a bearing capacity of more than 20 tons; The large anchorage range suspends the weak surrounding rock on the surface of the roadway in the deep stable rock formation to improve the stability of the surrounding rock of the roadwa...

AI Technical Summary

Problems solved by technology

[0004] However, due to reasons such as service conditions, installation reasons, and uneven force, anchor cable support failures occur from time to time.

At the same time, because the anchor cable support structure is in the surrounding rock of the roadway, whether the anchor cable fails can not be observed in time, so it is impossible to accurately judge whether the anchor cable has provided sufficient support force, making it difficult to find the quality problem of the anchor cable anchorage , prone to safety hazards and engineering accidents

[0005] In order to avoid the above problems, it is necessary to detect the supporting force of the anchor cable at the engineering site. At present, the pulling test method is generally used to obtain the supporting force data of the anchor cable. The anchor cable is stretched until the anchor cable is loosened. This method obtains the support force of the anchor cable at the same time, because the anchor cable puller continues to tension the anchor cable to be tested, the continuous tension is easy to damage the installed The anchorage structure of the anchor cable to be tested in the surrounding rock of the roadway, causing the anchor cable to fail

In addition, for the device used in the detection, the anchor cable puller is generally used to directly cover the anchor cable to be tested to tension the anchor cable, because the recoil force of the anchor cable puller affects the force of the anchor cable to a certain extent , it is easy to cause the test results to not truly reflect the actual support force of the anchor cable

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