Method for preventing and treating roof falling and side collapsing of coal roadway surrounding rock by anchor rope truss

Abstract

The invention provides a method for preventing and treating roof falling and side collapsing of coal roadway surrounding rock by an anchor rope truss, which belongs to the field of mineral engineering or civil engineering, and mainly solves the problem of roof falling and side collapsing accidents of the coal roadway surrounding rock. In the method, a plurality of groups of top late monomer anchor ropes and top plate truss anchor ropes are arranged on the top plate of the coal roadway at intervals so as to support and protect the top plate of the coal roadway; and a plurality of groups of side monomer anchor ropes and side truss anchor ropes are arranged on the roadway side so as to support and protect the roadway side; the whole design takes full advantage of being flexible construction, occupying less sections, costing short construction time, having excellent safety and reliability, saving money, applying strong pre-stress and the like of the anchor ropes, the top plate truss anchor ropes can penetrate into a maximum shear stress region at the top of the coal roadway to form very strong pre-stress, and the side truss anchor ropes can penetrate into the deep part of the roadway side and can be fixed by a channel steel to form very strong pre-stress, so that the method is more advantageous, particularly, in strengthening the damaged coal roadway in comparison with other methods.

Description

technical field [0001] The invention relates to the field of mining engineering or civil engineering, and is especially suitable for the supporting technology required for the coal-rock coal roadway support in mining engineering or the tunnel support in civil engineering to control coal-rock roof caving and roadside surrounding rock collapse. Background technique [0002] With the advancement of science and technology, the bolt support technology of coal roadways is becoming more and more mature. Although the bolt support plays a great role in the coal roadway support in the early stage, the problems of poor flexibility and high cost have become increasingly prominent. So now there are some coal roadways that use bolts and anchor cables for combined support. For example, as described in Patent No. ZL200410041386.7, the combination of anchor rods and anchor cables is used to increase the truss support capacity of coal roadways. The anchor cables used in the truss are drilled ...

AI Technical Summary

Problems solved by technology

[0002] With the advancement of science and technology, the bolt support technology of coal roadways is becoming more and more mature. Although the bolt support plays a great role in the coal roadway support in the early stage, the problems of poor flexibility and high cost have become increasingly prominent. So now there are some coal roadways that use bolts and anchor cables for combined support. For example, as described in the patent No. ZL200410041386.7, the combination of anchor rods and anchor cables is used to increase the truss support capacity of coal roadways. The anchor cables used in the truss are drilled at the angle between the roof of the coal roadway and the side of the roadway, the distance between the hole and the side of the roadway is 0, and there is no maximum shear stress area passing through the side of the roadway and the roof of the coal roadway, and through the double-hole connector The two anchor cables are not on the same axis. When a large stress is applied or the mine pressure is relatively strong, a very large shear force will be generated on the double-hole connector, resulting in damage to the connecting device

[0003] Moreover, the anchor cables in the ordinary truss structure are all driven into the roof of the coal roadway through the steel belt. Although the support of the steel belt can play a good supporting role, when the mine pressure is strong, the steel belt will be damaged, thereby It will damage the overall bearing capacity of the steel belt, greatly weaken the bearing capacity produced by the steel belt, and will also damage the anchor cable or the anchor rod itself. Great improvement, but still can't fundamentally solve this problem that hasn't been effectively solved for a long time

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