Anchor height pretightening force anchor rod and anchor cable combined supporting device and method

Abstract

The invention provides an anchor height pre-tightening force anchor rod and anchor cable combined supporting device and method.The anchor height pre-tightening force anchor rod and anchor cable combined supporting device comprises an anchor rod supporting device and an anchor cable supporting device, the anchor rod supporting device and the anchor cable supporting device are arranged in a staggered mode, the anchor rod supporting device is constructed firstly, a surrounding rock shallow rock stratum is fixed, and then a surrounding rock deep rock stratum is fixed through the anchor cable supporting device; anchor rod and anchor cable combined support can reinforce the overall structure of deep and shallow rock strata; the anchor rod supporting device comprises a sleeve, a nut and an anchor rod body. The anchor cable supporting device comprises an anchor cable rod body, a lock, a lock clamping piece and an anchor cable tensioning device. The anchor rods and the anchor cables are combined for supporting, so that the post-peak residual strength of the surrounding rock can be improved, the broken surrounding rock at the shallow part of the roadway can be suspended in a stable rock mass with better deep integrity, the bearing performance and the anchoring pre-tightening force of the deep rock mass are fully exerted, the stress of the broken rock mass is optimized, the surrounding rock of the roadway is anchored, and the expansion of a plastic zone is inhibited.

Description

technical field [0001] The invention relates to the technical field of support for high-stress areas in underground coal mines, in particular to a bolt-bolt-anchor-cable combined support device and method for expanding the surrounding rock crushing area and plastic area of ​​a deep roadway. Background technique [0002] With the increase of high-intensity mining and mining depth of underground coal mines, the difficulty of controlling the surrounding rock of the roadway gradually increases, resulting in the difficulty of roadway support, and the increase of roadway damage and repair rate. Therefore, safe, reliable and efficient roadway support technology is realized. Necessary conditions for safe and efficient mine production. [0003] Bolt anchor cable support has the advantages of fast construction speed, good supporting effect, low labor intensity and low cost, and is widely used in coal mine roadways. It solves the problem of complex roadway support in the original coal...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is how to solve the problem of suspending the broken surrounding rock in the shallow part of the roadway when the range of the broken area and plastic zone of the surrounding rock of the roadway is enlarged, and the anchor rod with a shorter length cannot be anchored into the rock mass with better integrity. In stable rock bodies with good deep integrity, anchor the surrounding rock of the roadway to inhibit the expansion of the plastic zone

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