A soft rock roadway surrounding rock pressure-relief-grouting collaborative support control system

Abstract

The application relates to the technical field of soft rock roadway surrounding rock supporting, and discloses a soft rock roadway surrounding rock pressure-releasing-grouting cooperative supporting control system which comprises a pressure-releasing part and a grouting part; the grouting part is used for grouting reinforcement of near-field surrounding rock of the soft rock roadway; pressure-releasing holes are uniformly arranged in the inner wall of the surrounding rock of the roadway; the pressure-releasing part is used for pressure-releasing treatment of far-field surrounding rock in the pressure-releasing holes; the pressure-releasing part comprises a steel pipe; the bottom end of the steel pipe is connected with a conveying pipe; the other end of the conveying pipe is connected with a high-pressure pump; a buffer mechanism is arranged at the lower part of the outer wall of the steel pipe and is used for buffering when the steel pipe releases pressure at the pressure-releasing holes by using the high-pressure pump; and a supporting mechanism is arranged at the outer wall of the steel pipe located in the pressure-releasing holes. The pressure-releasing part and the grouting part are matched, the stress of far-field surrounding rock of the soft rock roadway is effectively released, the stability of near-field surrounding rock of the soft rock roadway is further improved, and the cooperative control effect of pressure-releasing of far-field surrounding rock and grouting reinforcement of near-field surrounding rock of the soft rock roadway is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of soft rock roadway surrounding rock support, and particularly relates to a soft rock roadway surrounding rock pressure relief-grouting collaborative support control system. BACKGROUND

[0002] Soft rock can be classified according to its characteristics and the mechanism of significant plastic deformation. Generally, soft rock includes two categories: geological soft rock and engineering soft rock.

[0003] Geological soft rock refers to loose, scattered, soft, weak rock layers with low strength, large porosity, poor cementation, and significant influence of tectonic surface cutting and weathering, or containing a large amount of swelling clay minerals. Such rocks are mostly mudstone, shale, siltstone, and argillaceous sandstone, etc.

[0004] Engineering soft rock refers to engineering rock mass that can produce significant plastic deformation under engineering forces. It emphasizes the size of engineering mechanical load that soft rock bears, and analyzes and grasps the relative essence of soft rock from the relationship between the strength of soft rock and the engineering force load.

[0005] In terms of physical and mechanical properties, the shear and compressive strength of soft rock is relatively low, resulting in poor anti-sliding and bearing capacity. The deformation modulus of soft rock is small, meaning that it is prone to large deformation under external forces. Clay minerals in soft rock will soften and disintegrate when exposed to water, further reducing the mechanical properties of the rock. Soft rock has a significant rheological effect, that is, the deformation of the rock gradually increases over time.

[0006] The choice of anchoring method is crucial for the stability of the roadway. Effective anchoring methods can significantly improve the bearing capacity and stability of the surrounding rock of the roadway. However, even with effective anchoring methods, over time, soft rock may still deform due to redistribution of geological stresses and changes in load during the use of the roadway. Therefore, regular pressure relief can release the high stress inside the surrounding rock of the roadway, reducing the risk of deformation and damage to the surrounding rock. This is crucial for maintaining the long-term stability of the roadway.

[0007] In order to improve the stability of the surrounding rock of soft rock roadway, a soft rock roadway surrounding rock pressure relief-grouting collaborative support control system is proposed. SUMMARY

[0008] To solve the technical problems proposed in the background art, the present application provides a soft rock roadway surrounding rock pressure relief-grouting collaborative support control system.

[0009] The application adopts the following technical scheme: a soft rock roadway surrounding rock pressure relief-grouting cooperative support control system, which comprises a pressure relief member and a grouting member, the grouting member is used for grouting reinforcement and anchoring of the near-field surrounding rock of the soft rock roadway, the inner wall of the roadway is uniformly provided with pressure relief holes, and the pressure relief member is used for pressure relief treatment of the far-field surrounding rock in the pressure relief holes.

[0010] The pressure relief member comprises a steel pipe, the bottom end of the steel pipe is connected with a conveying pipe, the other end of the conveying pipe is connected with a high-pressure pump, a buffer mechanism is arranged on the lower part of the outer wall of the steel pipe and is used for buffering when the steel pipe uses the high-pressure pump to relieve pressure at the pressure relief hole, and a supporting mechanism is arranged on the outer wall of the steel pipe at the position in the pressure relief hole and is used for starting the supporting mechanism to further support the soft rock in the pressure relief hole when the steel pipe slides under the action of the reaction force, so as to ensure the stability during pressure relief.

[0011] As a further improvement of the above scheme, the buffer mechanism comprises a circular block fixed to the lower part of the outer wall of the steel pipe, the circular block is coaxially arranged with the steel pipe, a fixed block is fixedly connected to the lower part of the outer wall of the steel pipe, a plurality of vertical vertical sliding grooves are circumferentially arranged on the outer wall of the fixed block, and an external limiting cylinder is slidably connected to the vertical sliding grooves.

[0012] As a further improvement of the above scheme, the bottom end of the external limiting cylinder is elastically connected with a strong spring in the middle of the circular block, the strong spring is wound around the outer wall of the steel pipe, and the external limiting cylinder is fixed to the outer end of the pressure relief hole.

[0013] As a further improvement of the above scheme, the supporting mechanism comprises a bottom end supporting block inserted into the pressure relief hole, the bottom end of the bottom end supporting block is fixedly connected with the top end of the external limiting cylinder, the bottom end supporting block is coaxially arranged with the external limiting cylinder, a plurality of vertical circular rods are fixedly connected to the top end of the bottom end supporting block, a top end supporting block is fixedly connected to the top end of the circular rods, the top end supporting block is coaxially arranged with the steel pipe, the top end supporting block is slidably connected with the outer wall of the steel pipe, and the top end of the top end supporting block is provided with a sharp end.

[0014] As a further improvement of the above scheme, a plurality of limiting assemblies are sequentially and uniformly arranged at the circular rods, the limiting assembly comprises an adjusting block, the adjusting block is composed of a movable circular plate and a fixed circular plate, a plurality of sleeve plates one are circumferentially fixedly connected to adjacent ends of the movable circular plate and the fixed circular plate, the positions of the sleeve plates one at the movable circular plate and the fixed circular plate are matched, the movable circular plate is vertically slidably connected with the circular rod and is fixedly connected with the outer wall of the steel pipe, the fixed circular plate is fixedly connected with the circular rod and is slidably connected with the outer wall of the steel pipe, and the sleeve plates one at the same position are a group.

[0015] As a further improvement of the above-mentioned scheme, the sleeve plate two is rotatably connected to the other end of each group of hinge plates, and the annular plate is fixedly connected to the outer end of each group of sleeve plate two, each annular plate is coaxial with the steel pipe and arranged in an arc shape, a circular hole is formed in the middle of the outer wall of each annular plate, and a side notch is symmetrically formed outside the circular hole.

[0016] As a further improvement of the above-mentioned scheme, the side strip is slidably connected in each side notch, the cone is fixedly connected to the inner side of the two side strips, the cone slides along the circumferential extension direction of the outer wall of the steel pipe, a screw thread is formed in the inner end of each cone, and a screw rod is threadedly connected to the inner end of the cone, and the gear is fixedly connected to the inner end of each screw rod.

[0017] As a further improvement of the above-mentioned scheme, the sliding sleeve plate is slidably connected to the gear of each screw rod, a vertical notch matching the screw rod is formed in the middle of the sliding sleeve plate, the gear is meshingly connected to the one side of the plurality of rack plates, and the plurality of rack plates are fixedly connected to the outer wall of the steel pipe in a circumferential direction.

[0018] As a further improvement of the above-mentioned scheme, the top end of the steel pipe is an output end, and the guide nozzle is fixedly connected to the output end, and the diameter of the connection between the steel pipe and the inner wall of the guide nozzle gradually decreases to increase the flow rate.

[0019] Compared with the prior art, the beneficial effects of the present application are:

[0020] (I) The present application cooperates with the pressure relief member and the grouting member to effectively release the stress of the far-field surrounding rock of the soft rock roadway, further improves the stability of the near-field surrounding rock of the soft rock roadway, and realizes the synergistic control effect of pressure relief and near-field grouting reinforcement of the far-field surrounding rock of the soft rock roadway.

[0021] (II) The support mechanism can automatically limit the soft rock area in the pressure relief hole during the pressure relief operation, thereby ensuring the stability of the equipment during pressure relief.

[0022] (III) The connection between the inner wall of the steel pipe and the inner wall of the guide nozzle gradually reduces the diameter, thereby achieving a faster flow rate, which is conducive to the faster delivery of water into the soft rock by the high-speed pump, and is conducive to the release of stress in the soft rock area, and whether grouting plugging is needed is determined according to the actual situation, thereby further improving the stability of the surrounding rock of the soft rock roadway. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The present application provides a kind of soft rock roadway surrounding rock pressure relief-grouting synergic support control system overall structure schematic view for embodiment 1;

[0024] Figure 2 The present application Figure 1Structure schematic view of plan view;

[0025] Figure 3 For the invention Figure 2 Structure schematic view of section along A-A direction in the invention;

[0026] Figure 4 Structure schematic view of partial section of supporting mechanism in the invention;

[0027] Figure 5 Structure schematic view of buffer mechanism in the invention;

[0028] Figure 6 Structure schematic view of initial state of supporting mechanism in the invention;

[0029] Figure 7 Structure schematic view of unfolded state of supporting mechanism in the invention;

[0030] Figure 8 Structure schematic view of enlarged view of A in the invention. Figure 4

[0031] Main symbol explanation:

[0032] 1, steel pipe; 2, guide nozzle; 3, round block; 4, fixed block; 5, vertical sliding groove; 6, external limiting cylinder; 7, strong spring; 8, bottom support block; 9, round rod; 10, top support block; 11, movable round plate; 12, fixed round plate; 13, cover plate one; 14, hinged plate; 15, cover plate two; 16, annular plate; 17, side slot; 18, side strip; 19, cone; 20, screw rod; 21, gear; 22, rack plate; 23, sliding cover plate. DETAILED DESCRIPTION

[0033] Hereinafter, the invention will be further described in conjunction with the drawings and specific embodiments, and it should be noted that the following described embodiments or technical features can be combined in any manner to form new embodiments without conflict.

[0034] Embodiment 1: Please combine Figures 1-5 The soft rock roadway surrounding rock pressure relief-grouting collaborative support control system of the embodiment comprises a pressure relief part and a grouting part, the grouting part anchors the near-field surrounding rock of the soft rock roadway, the inner wall of the roadway is uniformly provided with pressure relief holes, and the pressure relief part is used to perform pressure relief treatment on the far-field surrounding rock in the pressure relief holes.

[0035] ​Specifically, when the construction personnel are in the roadway for grouting and pressure relief operation, the near-field surrounding rock within 0m-10m of the roadway needs to be grouted to further stabilize the soft rock roadway in this area; when the far-field surrounding rock beyond 10m is subjected to pressure relief operation, the pressure relief member needs to be connected, and the high-pressure water is used to crush and relieve the pressure of the far-field surrounding rock, so as to transfer and release the internal stress of the soft rock to a deeper part of the surrounding rock, and better improve the stability of the soft rock roadway surrounding rock.

[0036] The pressure relief member comprises a steel pipe 1, the bottom end of the steel pipe 1 is connected with a conveying pipe, the other end of the conveying pipe is connected with a high-pressure pump, a buffer mechanism is arranged on the outer wall of the steel pipe 1 at the lower part, which is used for buffering when the steel pipe 1 uses the high-pressure pump to relieve the pressure at the pressure relief hole, and a supporting mechanism is arranged on the outer wall of the steel pipe 1 at the position in the pressure relief hole, which is used for starting the supporting mechanism to further support the soft rock in the pressure relief hole when the steel pipe 1 slides under the action of the reaction force, so as to ensure the stability during pressure relief.

[0037] The buffer mechanism comprises a circular block 3 fixed to the outer wall of the steel pipe 1 at the lower part, the circular block 3 is coaxially arranged with the steel pipe 1, a fixed block 4 is fixedly connected to the outer wall of the steel pipe 1 at the lower part, a plurality of vertical vertical sliding grooves 5 are formed in the outer wall of the fixed block 4 in the circumferential direction, an external limiting cylinder 6 is slidably connected to the plurality of vertical vertical sliding grooves 5, a strong spring 7 is elastically connected between the bottom end of the external limiting cylinder 6 and the middle of the circular block 3, the strong spring 7 is wound around the outer wall of the steel pipe 1, and the external limiting cylinder 6 is fixed to the outer end of the pressure relief hole, wherein the inner wall of the external limiting cylinder 6 is clamped with the vertical vertical sliding groove 5, so as to avoid the fixed block 4 and the external limiting cylinder 6 from falling off, and the external limiting cylinder 6 drives the steel pipe 1 to return to the original position under the action of the strong spring 7.

[0038] The top end of the steel pipe 1 is an output end, and the output end is fixedly connected with a guide nozzle 2, and the caliber of the connection between the steel pipe 1 and the inner wall of the guide nozzle 2 gradually decreases to increase the flow rate.

[0039] The grouting member comprises a grouting pump and a conveying pipeline, which is used for grouting operation in the area needing grouting, and the pressure relief hole after experiencing pressure relief, according to the actual situation of the soft rock area, it is determined whether to use the grouting member to grout in the pressure relief hole, so as to ensure the stability of the soft rock roadway surrounding rock.

[0040] The implementation principle of the soft rock roadway surrounding rock pressure relief-grouting collaborative support control system in the embodiment of the application is as follows:

[0041] After the device is connected with the conveying pipe and the high-pressure pump, the device uses the supporting member, the supporting member is a prior art, comprising a mobile lifting device and a fixing device, which is used for positioning and adjusting the device and providing stable support.

[0042] The guide nozzle 2 and the bottom end supporting block 8 are extended into the pressure relief hole, and the device is fixed, the high-pressure pump is started, the high-speed water flow is sprayed into the soft rock area in the pressure relief hole along the steel pipe 1 to the guide nozzle 2, the inside of the soft rock area is impacted, the stress generated by the deformation of the soft rock area is released, and with the high-pressure washing, the reaction force will push the steel pipe 1 to slide in the opposite direction of the conveying, slide and move down under the connection of the vertical sliding groove 5 and the external limiting cylinder 6, and stretch and retract to adapt under the support of the strong spring 7 and the circular block 3.

[0043] When the high-pressure pump completes the water delivery, the whole steel pipe 1 will be returned to the original position under the pushing of the external limiting cylinder 6 and the guide nozzle 2 limited inside the external limiting cylinder 6 by the strong spring 7.

[0044] Embodiment 2: in combination with Figure 1 , Figure 4 , Figure 6 , Figure 7 and Figure 8 , this embodiment is further improved on the basis of embodiment 1:

[0045] The supporting mechanism comprises a bottom end supporting block 8 inserted into the pressure relief hole, the bottom end of the bottom end supporting block 8 is fixedly connected with the top end of the external limiting cylinder 6, and the bottom end supporting block 8 is coaxially arranged with the external limiting cylinder 6, a plurality of vertical round rods 9 are uniformly fixedly connected with the top end of the bottom end supporting block 8, a top end supporting block 10 is fixedly connected with the top end of the plurality of round rods 9, the top end supporting block 10 is coaxially arranged with the steel pipe 1, and the top end supporting block 10 is slidably connected with the outer wall of the steel pipe 1, the top end of the top end supporting block 10 is provided in a pointed end, a plurality of limiting assemblies are uniformly arranged at the round rods 9 in sequence, the limiting assembly comprises an adjusting block, the adjusting block is composed of a movable circular plate 11 and a fixed circular plate 12, a plurality of sleeve plates one 13 are fixedly connected with the movable circular plate 11 and the fixed circular plate 12 in a circumferential direction, and the sleeve plates one 13 at the movable circular plate 11 and the fixed circular plate 12 are positionally matched, wherein the movable circular plate 11 is slidably connected with the round rod 9 in a perpendicular direction, the movable circular plate 11 is further fixedly connected with the outer wall of the steel pipe 1, the fixed circular plate 12 is fixedly connected with the round rod 9, and the fixed circular plate 12 is slidably connected with the outer wall of the steel pipe 1, the matched sleeve plates one 13 at the same position form a group, the sleeve plates one 13 at each group are rotationally connected with a hinged plate 14, the other end of each group of hinged plates 14 is rotationally connected with a sleeve plate two 15, the outer end of each group of sleeve plates two 15 is fixedly connected with an annular plate 16, each annular plate 16 is coaxial with the steel pipe 1 and is arranged in an arc shape, a circular hole is formed in the middle of the outer wall of each annular plate 16, and a side slot 17 is symmetrically formed outside the circular hole of the annular plate 16, a side strip 18 is slidably connected in each side slot 17, a cone 19 is fixedly connected inside the two side strips 18, the cone 19 slides along the circumferential extension direction of the outer wall of the steel pipe 1, a screw thread is formed in the inner end of each cone 19, a screw rod 20 is threadedly connected in the cone 19, the inner end of each screw rod 20 is fixedly connected with a gear wheel 21, a sliding sleeve plate 23 is slidably connected to the screw rod 20 close to the gear wheel 21, a vertical slot matching the screw rod 20 is formed in the middle of the sliding sleeve plate 23, which is used to ensure that the screw rod 20 can only slide in the vertical direction of the vertical slot of the sliding sleeve plate 23 and cannot move horizontally, a gear strip plate 22 is meshingly connected to one side of each gear wheel 21, and the gear strip plate 22 is fixedly connected with the outer wall of the steel pipe 1 in a circumferential direction, wherein, when the steel pipe 1 slides in another direction under the reaction force of the high-pressure pump, a plurality of movable circular plates 11 are simultaneously driven to move downward along the outer wall of the steel pipe 1, the distance displacement change between the movable circular plate 11 and the fixed circular plate 12 is utilized to quickly push the annular plate 16 to move outward under the hinging of the two hinged plates 14 and the sleeve plate two 15, and abut against the soft rock, and when the steel pipe 1 slides downward, the cone 19 can be more quickly driven to slide outward under the meshing connection of the gear strip plate 22 and the gear wheel 21, and the outer end sharp area of the cone 19 is used to position the soft rock.

[0046] The implementation principle of the soft rock roadway surrounding rock pressure relief-grouting collaborative support control system in the embodiment of the application is as follows:

[0047] When the steel pipe 1 slides to the direction of the round block 3 under the reaction force, the movable round plates 11 fixedly connected with the outer wall of the steel pipe 1 are synchronously started with the rack plate 22, the movable round plates 11 will vertically move downwards along the round rod 9, and when moving downwards, the two hinged plates 14 will push the annular plate 16 of the pushing mechanism to slide to the outside and abut against and fix the soft rock, and when the rack plate 22 moves downwards, the gear 21 engaged with the rack plate 22 will be synchronously driven to rotate, and the taper 19 threadedly connected with the screw rod 20 will slide to the outside along the side slot 17, and finally be inserted into the soft rock area to realize further fixation and guarantee the stability of the pressure relief operation.

[0048] When the pressure relief operation is completed, the supporting mechanism will be reversely recovered when the strong spring 7 elastically returns, so that the limiting with the soft rock is released, and the taking out is facilitated.

[0049] The above-mentioned embodiments are only the preferred embodiments of the present application, and cannot be used to limit the protection scope of the present application, and any non-essential changes and replacements made by the person skilled in the art on the basis of the present application shall belong to the protection scope of the present application.

Claims

1. A soft rock tunnel surrounding rock pressure relief-grouting collaborative support control system, comprising a pressure relief component and a grouting component, wherein the grouting component performs grouting reinforcement on the near-field surrounding rock of the soft rock tunnel, and pressure relief holes are uniformly opened on the inner wall of the tunnel, and the pressure relief component is used to relieve pressure on the far-field surrounding rock in the pressure relief holes. Its features are: in, The pressure relief component includes a steel pipe, with a conveying pipe connected to the bottom end of the steel pipe and a high-pressure pump connected to the other end of the conveying pipe. A buffer mechanism is provided on the lower part of the outer wall of the steel pipe to buffer the pressure relief hole when the steel pipe is depressurized by the high-pressure pump. A support mechanism is provided on the outer wall of the steel pipe inside the pressure relief hole. When the steel pipe slides under the reaction force, the support mechanism can be activated to further expand and support the soft rock inside the pressure relief hole, ensuring stability during pressure relief. The buffer mechanism includes a circular block fixed to the lower part of the outer wall of the steel pipe. The circular block is coaxially arranged with the steel pipe. A fixing block is fixedly connected to the lower part of the outer wall of the steel pipe. Multiple vertical grooves are opened in the circumferential direction on the outer wall of the fixing block. External limiting cylinders are slidably connected to the multiple vertical grooves. The support mechanism includes a bottom support block inserted into the pressure relief hole. The bottom end of the bottom support block is fixedly connected to the top end of the external limiting cylinder, and the bottom support block and the external limiting cylinder are coaxially arranged. Multiple vertical round rods are uniformly fixedly connected to the top end of the bottom support block. A top support block is fixedly connected to the top end of the multiple round rods. The top support block is coaxially arranged with the steel pipe and is slidably connected to the outer wall of the steel pipe. Multiple sets of limiting components are uniformly arranged at the round rods. The limiting components include adjusting blocks. The adjusting blocks are composed of movable round plates and fixed round plates. Multiple sleeve plates are circumferentially fixedly connected to the adjacent ends of the movable round plate and the fixed round plate. The sleeve plates at the movable round plate and the fixed round plate are matched in position. The movable round plate is slidably connected to the round rod and is also fixedly connected to the outer wall of the steel pipe. The fixed round plate is fixedly connected to the round rod and is slidably connected to the outer wall of the steel pipe. The sleeve plates matched at the same location constitute a set.

2. The soft rock tunnel surrounding rock pressure relief-grouting coordinated support control system as described in claim 1, characterized in that, The bottom end of the external limiting cylinder is elastically connected to the middle of the circular block by a strong spring, and the strong spring is wrapped around the outer wall of the steel pipe. The external limiting cylinder is fixed to the outer end of the pressure relief hole.

3. The soft rock tunnel surrounding rock pressure relief-grouting coordinated support control system as described in claim 1, characterized in that, The top of the top support block is a pointed tip.

4. The soft rock tunnel surrounding rock pressure relief-grouting coordinated support control system as described in claim 1, characterized in that, Each set of sleeve plates is rotatably connected to a hinge plate at one end, and each set of hinge plates is rotatably connected to a second sleeve plate at the other end. Each set of second sleeve plates is fixedly connected to an annular plate at its outer end. Each annular plate is coaxial with the steel pipe and is arc-shaped. Each annular plate has a circular hole in the middle of its outer wall, and the annular plate has symmetrical side slots on the outside of the circular hole.

5. The soft rock tunnel surrounding rock pressure relief-grouting coordinated support control system as described in claim 4, characterized in that, Each of the side slots is slidably connected to a side strip, and a cone is fixedly connected to the inner side of each of the two side strips. The cone slides along the circumferential extension direction of the outer wall of the steel pipe. Each cone has a thread at its inner end, and a screw is threadedly connected to the inner end of each cone. A gear is fixedly connected to the inner end of each screw.

6. The soft rock tunnel surrounding rock pressure relief-grouting coordinated support control system as described in claim 5, characterized in that, Each screw is slidably connected to a sliding sleeve near the gear. The sliding sleeve has a vertical slot in the middle that matches the screw. Each of the gears is meshed with a rack plate on one side. Each of the rack plates is circumferentially fixed to the outer wall of the steel pipe.

7. A soft rock tunnel surrounding rock pressure relief-grouting coordinated support control system as described in claim 6, characterized in that, The top of the steel pipe is the output end, and a guide nozzle is fixedly connected to the output end. The diameter of the steel pipe gradually decreases at the connection between the steel pipe and the inner wall of the guide nozzle to increase the flow rate.

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