Grouting anchor cable and anchor rod supporting structure suitable for activated fault

Abstract

The utility model provides a grouting anchor cable and anchor rod supporting structure suitable for an activated fault, and relates to the technical field of roadway supporting, the grouting anchor cable and anchor rod supporting structure comprises grouting anchor cables, anchor cables, anchor rods and displacement measuring pipes, the grouting anchor cables and a fault surface are arranged in an oblique crossing mode, the anchor cables are arranged on the two sides of the intersection of the fault and a roadway respectively, and the anchor cables and the displacement measuring pipes are arranged in a staggered mode. Arranging a plurality of anchor rods along the surrounding rock of the roadway; the grouting anchor cable comprises a resin anchoring section, a grouting anchoring section and an outer anchoring section, a protection pipe is arranged at a grout outlet of a grouting pipe of the grouting anchor cable, a branch pipe is arranged on the protection pipe, and a pressure valve is arranged at a port of the branch pipe. The grouting anchor cable and the anchor rod supporting structure are arranged in the roadway penetrating through the activated fault area, the effect of the grouting anchor cable is detected through the displacement measuring pipe, and the stress change is monitored through the anchor cable dynamometer, so that the influence of the activated fault on the roadway can be effectively controlled, and water inrush accidents, fault slippage and the like are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to roadway support technical field especially provide a grouting anchor cable and anchor rod support structure suitable for active fault. BACKGROUND

[0002] Fault is the structure that the crust is forced to break, and the significant relative displacement of the rock mass on both sides of the fault plane occurs. Fault slip refers to the phenomenon that the rock on the fault slips relatively under the action of crust movement. When excavating a roadway, the original stress state of the surrounding rock will be destroyed when encountering a fault, causing stress concentration and triggering fault slip, resulting in rock burst, water inrush and other disasters. Under the effect of mining, the stress state change of fault zoning will cause changes in water conductivity and permeability. The fissures expand due to stress changes, and under the action of high-pressure water, the confined water is further guided, which is prone to water inrush hazards. The closer the roadway is to the fault plane, the greater the deformation of the roof and floor, and the more unstable the surrounding rock is, so it is particularly important to control the stability of the surrounding rock during excavation. The commonly used methods for passing through the fault include advanced pipe shed support technology, grouting reinforcement technology, artificial false roof technology, hydraulic expansion anchor rod support, and impact wedge support technology, among which the grouting reinforcement technology is more common. Therefore, a technology for preventing and controlling fault activation with better effect is needed. SUMMARY

[0003] In order to effectively control the influence of activated fault on the roadway and avoid water inrush accidents and fault slip, the utility model provides a grouting anchor cable and anchor rod support structure suitable for activated fault, and the specific technical solutions are as follows.

[0004] A grouting anchor cable and anchor rod support structure suitable for activated fault, comprising a grouting anchor cable, an anchor cable, an anchor rod and a displacement measuring pipe, the grouting anchor cable is arranged obliquely across the fault plane, the anchor cables are arranged on both sides of the intersection of the fault and the roadway, the anchor cables and the displacement measuring pipes are arranged alternately and at intervals, and a plurality of anchor rods are arranged along the surrounding rock of the roadway; the grouting anchor cable comprises a resin anchoring section, a grouting anchoring section and an outer anchoring section, a protection pipe is arranged at the position of the grouting pipe of the grouting anchor cable, branch pipes are arranged on the protection pipe, and pressure valves are arranged at the ports of the branch pipes.

[0005] Preferably, at least two grouting anchor cables are arranged, the grouting anchor cables pass obliquely through the fault from inside the roadway, and the middle parts of the grouting anchor cables intersect the fault.

[0006] Preferably, three grouting pipes are arranged in the grouting anchor cable, and the three grouting pipes extend to the tail, the end and the middle of the grouting anchor cable respectively.

[0007] Preferably, more than two branch pipes are arranged on the protection pipe, and pressure valves are arranged at the ports of the branch pipes.

[0008] It is also preferred that the anchor cables are anchored in the hanging wall and the foot wall of the fault respectively, and the anchor ends of the anchor cables are provided with anchor cable dynamometers.

[0009] It is also preferred that the anchor cables and the displacement measuring pipes are arranged in parallel, and the anchor cables and the displacement measuring pipes are vertically anchored along the roof of the roadway.

[0010] It is also preferred that the anchor net support is hung in the roadway, and the cross section of the roadway is circular, arched, trapezoidal or rectangular.

[0011] It is further preferred that the opening pressure of the pressure valve is less than the maximum pumping pressure of the grouting pump.

[0012] The grouting anchor cable and anchor rod support structure suitable for the activated fault has the beneficial effects that: the grouting anchor cable used in the structure is suitable for the broken surrounding rock environment of the activated fault, and the protection pipe structure capable of effectively avoiding pipe blockage is arranged; in addition, the grouting anchor cable and anchor rod support structure are arranged in the roadway passing through the activated fault area, the effect of the grouting anchor cable is detected through the displacement measuring pipe, and the stress change is monitored through the anchor cable dynamometer, so that the influence of the activated fault on the roadway can be effectively controlled, and water inrush accidents, fault slip and the like are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a flowchart of roadway support;

[0014] Figure 2 It is a schematic view of the grouting anchor cable and anchor rod support structure suitable for the activated fault;

[0015] Figure 3 It is a schematic view of the relationship between the roadway and the fault structure;

[0016] Figure 4 It is a schematic view of grouting anchor cable construction;

[0017] Figure 5 It is a schematic view of the arrangement of the displacement measuring pipe;

[0018] Figure 6 It is a structure view of the grouting anchor cable;

[0019] Figure 7 It is a sectional structure view of the grouting anchor cable;

[0020] Figure 8 It is a schematic view of the structure of the protection pipe;

[0021] In the drawing: 1-grouting anchor cable, 2-anchor cable, 3-anchor rod, 4-displacement measuring pipe, 5-roadway, 6-fault, 7-roadway central axis, 8-outer anchoring section, 9-grouting anchoring section, 10-resin anchoring section, 11-grouting pipe, 12-steel strand, 13-branch pipe, 14-protection pipe. DETAILED DESCRIPTION

[0022] In combination Figures 1 to 8 The specific embodiment of the grouting anchor cable and anchor rod supporting structure suitable for active fault is described with reference to the drawings.

[0023] The grouting anchor cable and anchor rod supporting structure suitable for active fault comprises a grouting anchor cable 1, an anchor cable 2, an anchor rod 3 and a displacement measuring pipe 4, the grouting anchor cable and the common anchor cable are matched with each other in the structure, the displacement monitoring pipe cooperates with the anchor cable dynamometer to monitor the surrounding rock of the roadway, and the anchor rod reinforces the roadway. The grouting anchor cable 1 is arranged obliquely across the fault 6, and the fault is reinforced by grouting through the grouting anchor cable 1. The intersection of the fault 6 and the roadway 5 is arranged with anchor cables on both sides, and the anchor cable 2 is used to reinforce the roof of the roadway. The anchor cable 2 and the displacement measuring pipe 4 are arranged staggered and spaced, the displacement measuring pipe is used to determine the effectiveness of the grouting anchor cable in controlling the activation of the fault, a plurality of anchor rods 3 are arranged along the surrounding rock of the roadway to reinforce the surrounding rock of the roadway. The grouting anchor cable 1 comprises a resin anchoring section 10, a grouting anchoring section 9 and an outer anchoring section 8, a protection pipe 14 is arranged at the position of the grouting outlet of the grouting pipe 11 of the grouting anchor cable, the protection pipe 14 can effectively solve the problem of blockage of the grouting pipe caused by the broken surrounding rock of the roadway, a branch pipe 13 is arranged on the protection pipe 14, and a pressure valve is arranged at the port of the branch pipe 13, so that when the outlet of the protection pipe is blocked, the pressure valve at the branch pipe 13 is opened under the action of the grouting pressure, and grouting is carried out through the branch pipe after the opening, so that complete grouting of the surrounding rock of the roadway is ensured.

[0024] At least two grouting anchor cables are arranged at the fault 6, the grouting anchor cable 1 is obliquely arranged from the inside of the roadway to the fault, the middle part of the grouting anchor cable 1 intersects with the fault, and the grouting pipe of the grouting anchor cable 1 is fully grouted at the position of the fault 6 to anchor the surrounding rock of the roadway. At least three grouting pipes are arranged in the grouting anchor cable 1, and the three grouting pipes extend to the tail, the end and the middle of the grouting anchor cable respectively, the grouting pipes can preferentially inject high-strength grouting materials that can quickly solidify into the tail and the top of the novel grouting anchor cable, and the grouting pressure sensor is used to monitor the change of the grouting pressure in real time, so that the grouting pipe is filled.

[0025] Two or more branch pipes are arranged on the protection pipe 14, and a pressure valve is arranged at the port of each branch pipe 13, the number of the branch pipes 13 is determined according to the broken degree of the surrounding rock of the roadway, and the plurality of branch pipes can ensure the smoothness of the grouting pipe as much as possible.

[0026] The anchor cables are anchored into the upper wall and the lower wall of the fault respectively, and an anchor cable dynamometer is arranged at the anchoring end of the anchor cable, so that the stress change of the anchor cable can be monitored through the anchor cable dynamometer, and the common anchor cable can effectively improve the support of the roadway. The anchor cable and the displacement measuring pipe are arranged in parallel, and the anchor cable and the displacement measuring pipe are vertically anchored along the roof of the roadway, so that displacement monitoring is facilitated.

[0027] The anchor net support hung in the roadway can effectively deal with the broken surrounding rock of the roadway, and a support or a shed support can be erected at the position where the roadway deforms seriously. The cross section of the roadway is circular, arched, trapezoidal or rectangular, and the intersection of the trend of the roadway with the fault plane is determined according to the shape of the roof to determine the construction angle of the grouting anchor cable.

[0028] The opening pressure of the pressure valve is less than the maximum pumping pressure of the grouting pump, and the pumping pressure of the grouting pump can be changed.

[0029] The structure is applied to an activated fault, a certain number and interval of the new grouting anchor cables are arranged on both sides of the fault slip area of the roadway after mining is completed, and the common anchor cables are arranged on the upper and lower walls of the fault. In the roadway, the grouting anchor cables are arranged to pass through the fault. The displacement pipes are arranged on the upper and lower walls of the fault. The high-strength grouting material capable of quickly solidifying is injected into the tail and top of the new grouting anchor cable through the grouting pipe, the grouting pressure sensor is used to monitor the change of the grouting pressure in real time, so that the grouting anchor cable is filled; the high-strength grouting material is injected into the middle part of the grouting anchor cable through the grouting pipe, so that the grouting anchor cable is filled; after the grouting material is solidified, the grouting body closely bonded with the earth crust is formed, and the roadway surrounding rock is reinforced by the anchor rod; the process is repeated until the entire fault slip area is stable. The displacement measuring pipe with scales on the surface of the roadway is used to directly read data, the displacement measuring pipe readings are recorded manually once a day, and the effectiveness of the grouting anchor cable in controlling the activated fault is judged. The common anchor cables are used to monitor the change of the fault activity stress by using the anchor cable dynamometer, and the effect of the grouting anchor cable in controlling the activated fault is explored.

[0030] The grouting anchor cable used in the structure is provided with the protection pipe structure capable of effectively avoiding pipe blockage to adapt to the broken surrounding rock environment of the activated fault. In addition, the grouting anchor cable and the anchor rod support structure are arranged in the roadway passing through the activated fault area, the effect of the grouting anchor cable is detected by the displacement measuring pipe, and the stress change is monitored by the anchor cable dynamometer, so that the influence of the activated fault on the roadway can be effectively controlled, and the water inrush accident and the fault slip can be avoided.

[0031] Of course, the above description is not a limitation of the utility model, and the utility model is not limited to the above examples. Changes, modifications, additions or replacements made by the person skilled in the art within the essential scope of the utility model should also belong to the protection scope of the utility model.

Claims

1. A grouting anchor cable and anchor bolt support structure suitable for activated faults, characterized in that, The system includes grouting anchor cables, anchor cables, anchor rods, and displacement measuring tubes. The grouting anchor cables are arranged obliquely to the fault plane, and anchor cables are arranged on both sides at the intersection of the fault and the roadway. The anchor cables and displacement measuring tubes are arranged alternately, and multiple anchor rods are arranged along the surrounding rock of the roadway. The grouting anchor cables include a resin anchoring section, a grouting anchoring section, and an external anchoring section. The grouting pipe of the grouting anchor cable is equipped with a protective pipe at the grout outlet, and a branch pipe is installed on the protective pipe. A pressure valve is installed at the end of the branch pipe.

2. The grouting anchor cable and anchor bolt support structure suitable for activated faults according to claim 1, characterized in that, At least two grouting anchor cables are installed, which pass obliquely through the fault from inside the roadway, and the middle of the grouting anchor cable intersects with the fault.

3. A grouting anchor cable and anchor bolt support structure suitable for activated faults according to claim 1 or 2, characterized in that, The grouting anchor cable has three grouting pipes arranged inside, which extend to the tail, end and middle of the grouting anchor cable respectively.

4. A grouting anchor cable and anchor bolt support structure suitable for activated faults according to claim 1 or 2, characterized in that, The protective pipe is provided with two or more branch pipes, and a pressure valve is provided at the port of each branch pipe.

5. A grouting anchor cable and anchor bolt support structure suitable for activated faults according to claim 1, characterized in that, The anchor cables are respectively anchored into the upper and lower plates of the fault, and anchor cable force gauges are installed at the anchoring ends of the anchor cables.

6. A grouting anchor cable and anchor bolt support structure suitable for activated faults according to claim 5, characterized in that, The anchor cables and displacement measuring tubes are arranged in parallel and are vertically anchored into the roadway roof.

7. The grouting anchor cable and anchor bolt support structure suitable for activated faults according to claim 1, characterized in that, The tunnel is supported by anchor netting, and the cross-section of the tunnel is circular, arched, trapezoidal, or rectangular.

8. A grouting anchor cable and anchor bolt support structure suitable for activated faults according to claim 1, characterized in that, The opening pressure of the pressure valve is less than the maximum pumping pressure of the grouting pump.

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