Hyperstatic scour prevention four-dimensional roadway support device and support method thereof

Abstract

The invention discloses a hyperstatic scour prevention four-dimensional roadway support device, which comprises anchor cables and anchor rods, wherein the anchor cables are distributed on a laneway top, a laneway side or a bottom plate in an arrayed manner according to a certain regularity, and the anchor rods are arranged on the laneway top, the laneway side or the bottom plate. A hole protecting bowl-shaped lock is arranged at an anchor cable hole of each anchor cable, each anchor cable exposed in a laneway is disassembled into a plurality of steel strands, the steel strands are connected with the adjacent anchor rods through locks in different directions or are connected with steel strands of the anchor cables, and a deformation block is arranged between each steel strand and a coal-rock mass surface. By the aid of the hyperstatic scour prevention four-dimensional roadway support device in the technical scheme, axial, tangential and radial acting force of the laneway can be controlled, and the support device is applicable to control of large deformation of engineering surrounding rocks with strong disturbance and outburst-proneness in an area of high stress. The invention further discloses a support method of the hyperstatic scour prevention four-dimensional roadway support device, which is simple, convenient and reliable in operation and convenient in construction.

Description

technical field [0001] The invention relates to a roadway (chamber) support and reinforcement device and a support method thereof, in particular to an ultra-static anti-scouring four-dimensional support device and a support method for a roadway in a high-stress area of ​​a coal mine underground. technical background [0002] With the increase of coal mining depth, the movement of overburden rock and mine pressure have shown some new features. Surrounding rocks in deep stopes, roadways and chambers are characterized by high stress, high temperature, high groundwater pressure, high disturbance intensity, high impact risk, obvious creep, and large deformation, which makes it difficult to support roadways and chambers and requires repairs. Frequent, huge maintenance costs and other issues. [0003] At present, roadways and chambers in high-stress areas are mainly supported by ordinary anchor mesh cables, truss anchors, anchor injection, and U-shaped steel sheds. These support ...

AI Technical Summary

Problems solved by technology

[0008] (3) Anchor cables for fixing the roof strata are arranged in single rows along the central axis of the roof of the roadway at intervals, which is only suitable for roadways with small cross-sections;

[0009] (4) This kind of steel strand connection method is easy to cause eccentric stretching, which makes some steel strands break due to heavy load;

[0010] (5) The anchor cable and the anchor rod are in the same row. Due to the influence of the exposed part of the anchor rod and the lock, they cannot be in close contact with the roof, and the steel strand cannot exert radial force on the roof.

[0011] (6) Since the hole guard bowl has no locking function for the anchor cable, when a steel strand is broken, the control effect of the anchor cable on the deformation of the roof will be weakened

[0013] (1) Two anchor cables are connected to control the entire side or top coal rock, with a large extrusion range and limited effect, especially for the coal rock in the middle part of the side or top;

[0014] (2) Most of the steel strands cannot cling to the surface of the roadway and cannot apply extrusion force;

[0016] (4) The coupling bears partial load and is easily damaged;

[0017] (5) Part of the component force of the anchor cable has an effect on the deformation control of the surrounding rock, and most of the force is used to balance each other, which is not efficient

[0021] (3) The hole protection bowl is a four-lobed wing circle. When the bent steel wire is connected, stretched and deformed later, the steel wire is easy to slide into the notch and split the surrounding rock; in addition, because the hole protection bowl has no locking function, when there is When the steel wire is broken, the control effect of the rope on the sinking of the roof will be weakened;

[0022] (4) The rope is affected by the hole guard bowl and the lock, the steel wire cannot cling to the top plate, and cannot exert radial force on the top plate

[0023] (5) There is no steel wire connected with other ropes, so it is very difficult to fix; when the fixation is not good, the control effect of the rope on the sinking of the roof will also be weakened

Images