A roof support method for water-rich soft rock tunnel

Abstract

The present invention discloses a method for supporting the roof of a water-rich soft rock tunnel, and relates to the field of soft rock support. It solves the problem that temporary support is needed for the tunnel when anchor bolt support is used for anchor grouting and drilling. The existing temporary support is time-consuming and labor-intensive to be manually constructed, and the manual construction is prone to the offset of the temporary support device, which makes the support force uneven. A method for supporting the roof of a water-rich soft rock tunnel, comprising the following steps: first adjusting the support spacing and applying support to both sides of the soft rock tunnel, then docking and self-locking the support main frame, followed by anchor grouting and drilling, and finally anchoring and resetting. The method for supporting the roof of a water-rich soft rock tunnel of the present invention saves time and effort in supporting operations, and through centering and correcting support, the support frame and the support main frame cooperate to make the support force uniform, thereby preventing accidents in the tunnel during anchor grouting and drilling.

Description

Technical Field

[0001] The present invention relates to the field of soft rock support, and in particular to a method for supporting roof of a water-rich soft rock roadway. Background Art

[0002] Soft rock can be divided into two categories: geological soft rock and engineering soft rock. Geological soft rock refers to loose, loose, soft, and weak rock formations with low strength, high porosity, poor cementation, significant structural cuts and weathering, or containing large amounts of expansive clay minerals. Anchor support, on the other hand, involves inserting anchors within the surrounding rock to modify its mechanical state, forming a cohesive and stable rock belt around the roadway. The combined action of the anchors and the surrounding rock maintains roadway stability.

[0003] At present, coal mines are mainly mined underground, which requires the excavation of a large number of tunnels underground and the support of the tunnels to keep the tunnels unobstructed and the surrounding rock stable. At present, most tunnel supports are anchor support. Before anchor support is carried out, the tunnel needs to be anchored and drilled, and then the anchors are driven into the holes to achieve support. In order to prevent the tunnel from collapsing during anchor drilling, temporary support is required for the inner wall of the tunnel. The existing temporary support method is time-consuming and labor-intensive to manually build. Especially for water-rich soft rock tunnels, manual construction is prone to temporary support device construction offset, resulting in uneven support force, and the inability to quickly implement temporary support, which greatly slows down the efficiency of tunnel support. Summary of the Invention

[0004] In order to overcome the shortcomings that manual construction of temporary support is not only time-consuming and labor-intensive, but also prone to temporary support device deviation, resulting in uneven support force and slowing down the efficiency of tunnel support, the present invention provides a water-rich soft rock tunnel roof support method to solve the above problems.

[0005] A method for supporting the roof of a water-rich soft rock tunnel uses a support device with a correction function for the soft rock tunnel. The device includes intermediate bases distributed in opposite directions, both sides of the intermediate base are slidably connected to movable base plates, a stretching assembly for adjusting the support spacing is fixedly connected between the intermediate bases, an auxiliary assembly for assisting workers in anchoring and drilling is slidably connected to the stretching assembly, a moving assembly is provided on the movable base plate, one end of the intermediate base is fixedly connected to a servo motor, a threaded shaft is rotatably connected to the intermediate base, a transmission assembly is provided between the output shaft of the servo motor and the threaded shaft, and a threaded shaft is threadedly connected to the intermediate base. The movable frame is provided with a plurality of movable members, each of which is provided with a plurality of movable members, and the movable members are provided with a plurality of movable members. The movable frame is provided with a plurality of movable members, and the movable members are provided with a plurality of movable members.

[0006] The method comprises the following steps:

[0007] S1: When workers are performing temporary support and anchor drilling work in soft rock tunnels, they push the middle bases at both ends in opposite directions according to work requirements, drive the adjusting grid to stretch, and make the support outer shell and the sliding inner shell slide relative to each other. After completing the adjustment of the support spacing according to work requirements, the moving assembly changes to the moving state, and then the servo motor is started to drive the sliding block to move linearly through the transmission, and drive the movable bottom plate to open to both sides to the full state, and immediately turn off the servo motor. At this time, the support frame applies support force to both sides of the soft rock tunnel, and then the worker operates the lifting shaft to move upward, and the lifting shaft drives the pulley to move upward, so that the middle base and the movable bottom plate are fully applied to the ground;

[0008] S2: After the support spacing is adjusted, the electric hydraulic push rod is turned on to push the sliding base upward. When the sliding base moves upward, it drives the limit slider to dock the two support main frames. When the limit slider contacts the self-locking block, the limit slider drives the self-locking block to compress the self-locking spring. After the self-locking spring is compressed to the limit slider and contacts the top of the support frame, the electric hydraulic push rod is immediately turned off. The self-locking spring rebounds and drives the self-locking block to lock the limit slider, thereby completing the temporary support of the soft rock tunnel.

[0009] S3: After completing the temporary support of the soft rock tunnel, the staff began to carry out anchor grouting drilling. The staff installed the drilling device to the center position of the lifting plate. The staff controlled the sliding support block and the sliding support frame to slide along the sliding inner shell through the operating panel to determine the longitudinal position of the anchor grouting drilling. Then the staff released the lock of the sliding support block by the locking assembly. At the same time, the staff controlled the sliding support block to slide along the sliding support frame through the operating panel to determine the horizontal position of the anchor grouting drilling. After the drilling position was determined, the staff controlled the lifting plate to rise to close contact with the roof of the soft rock tunnel by turning the operating panel, and then started the drilling device. The drilling waste and dust generated during drilling were discharged along the discharge pipe and collected;

[0010] S4: After the anchor drilling is completed and the anchoring construction is carried out, the staff will reset the sliding support block and the lifting plate, and then the staff will rotate the rotating rod. The rotating rod will drive the transmission rod through the connecting block, and the transmission rod will drive the self-locking block to compress the self-locking spring to release the locking limit of the limit slider. At the same time, the electric hydraulic push rod will be turned on to drive the sliding base to reset, and then the electric hydraulic push rod will be turned off. The staff will operate the lifting shaft to reset, and then turn on the servo motor to drive the mobile base plate to reset, and then turn off the servo motor. After the staff resets the mobile component, they will push the middle base to reset.

[0011] It is further explained that the upper side surface of the main support frame is set to an arc-shaped structure with the same curvature as the roof of the soft rock tunnel.

[0012] To further illustrate, the moving assembly includes a fixed frame, which is fixedly connected to the moving base plate. A lifting shaft is threadedly connected to the fixed frame. A fixed rotating block is provided at one end of the lifting shaft, and the fixed rotating block is rotatably connected to a pulley.

[0013] To further illustrate, a reversing block for changing the pulley is slidably provided on the fixed rotating block, and a locking buckle for locking the pulley is rotatably connected to the reversing block.

[0014] Further explanation, the self-locking assembly includes a central rotating shaft, which is fixedly connected to the middle base, and a rotating rod is rotatably connected to the central rotating shaft. Both ends of the rotating rod are hinged with connecting blocks, and the connecting blocks are hinged with a transmission rod. The transmission rod is slidably connected to a bracket, the bracket is fixedly connected to the middle base, and a self-locking block is fixedly connected to the transmission rod, which is slidably connected to the support frame. A self-locking spring is fixedly connected to the self-locking block, and the self-locking spring is fixedly connected to the support frame.

[0015] Further explanation: the stretching assembly includes a fixed frame, which is fixedly connected to the middle base, and is provided with an adjustment grid for changing the support spacing. The fixed frame is provided with a support outer shell, and the interior of the support outer shell is slidably connected to a sliding inner shell, and the sliding inner shell is slidably connected to a sliding support frame for supporting the auxiliary assembly.

[0016] To further illustrate, the sliding bracket is provided with through holes equidistantly spaced in the circumferential direction for limited sliding engagement with the locking assembly.

[0017] Further explanation, the auxiliary component includes a sliding support block, which is slidably connected to the sliding support frame. The sliding support block is threadedly connected to a lifting screw. The lower end of the lifting screw is fixedly connected to an operating disk. The lifting screw is fixedly connected to a lifting disk. The lifting disk is provided with a discharge pipe for recovering drilling waste. The sliding support block is slidably connected to a locking component for locking.

[0018] Further description, the locking assembly includes a pull rope, the pull rope is slidably connected to the sliding support block, the pull rope is fixedly connected to the locking plug shaft, and a locking spring is fixedly connected between the locking plug shaft and the sliding support block.

[0019] The beneficial effects of the present invention are:

[0020] 1. The fixed frame is fixedly connected to the middle base. When adjusting the support spacing, the fixed frame drives the adjustment grid to stretch, and the supporting outer shell and the sliding inner shell on the fixed frame slide to increase the adjustment spacing of the support spacing, greatly improving the support range.

[0021] 2. When not providing support, the support device is easy to move and can quickly provide temporary support at any location in the soft rock tunnel. The movable bottom plates on both sides of the middle base are opened from the center to both sides to position and correct the center of the support device and the center of the tunnel, thereby driving the support frame and the inner walls on both sides of the soft rock tunnel to provide temporary support.

[0022] 3. Mobile components are set on the movable bottom plates on both sides of the middle base. The staff can switch the travel state by rotating the reversing block and the locking buckle, which greatly improves the efficiency of temporary support. The lifting shaft in the mobile component can lift the pulley to the middle base and the movable bottom plate to fully focus on the ground, evenly distribute the pressure on the tunnel ground, and avoid the deviation of the support force during the anchor grouting drilling operation, which may cause the ground below to be squeezed and deformed.

[0023] 4. The upper side of the support main frame is set to an arc structure with the same curvature as the top plate of the soft rock tunnel, which fits more closely with the soft rock tunnel, making the support force of the support main frame on the top plate more uniform, and greatly improving the support effect. After the support main frame completes the support docking, the bracket and the self-locking block will limit and lock the limit slider to prevent the support main frame from falling directly when the electric hydraulic push rod has a power problem and cannot output the support force, causing damage to the tunnel and injury to the staff.

[0024] 5. When the staff is performing anchor grouting drilling, the sliding support block is slidably connected to the sliding support frame, and the sliding support frame is slidably connected to the sliding inner shell, so that the drilling position in the soft rock tunnel is multidimensional. The sliding support block is provided with a lifting plate and a feeding pipe. When the drilling operation is carried out, the waste and dust generated by the drilling will be collected along the feeding pipe. The sliding support block is slidably connected with a locking assembly. The staff drives the locking spring to compress or stretch through the pull rope, so that the locking plug shaft is locked with the through hole of the sliding support frame to prevent the drilling device from sliding during anchor grouting drilling, which causes the drilling position to shift. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic flow chart of the water-rich soft rock tunnel roof support method of the present invention.

[0026] Figure 2 This is a schematic diagram of the three-dimensional structure of the support device with a deviation correction function for soft rock tunnels of the present invention.

[0027] Figure 3 This is a schematic diagram of a partial explosion structure of a support device with a deviation correction function for a soft rock tunnel according to the present invention.

[0028] Figure 4 This is a schematic diagram of the three-dimensional structure of a partial support device with a correction function for soft rock tunnels of the present invention.

[0029] Figure 5 This is a schematic diagram of the three-dimensional structure of the mobile component of the support device with a correction function for soft rock tunnels of the present invention.

[0030] Figure 6 This is a schematic diagram of the three-dimensional structure of the self-locking component of the support device with a correction function for soft rock tunnels of the present invention.

[0031] Figure 7 This is a schematic diagram of the three-dimensional structure of the tensile component of the support device with a correction function for soft rock tunnels of the present invention.

[0032] Figure 8 This is a schematic diagram of the three-dimensional structure of the drilling assembly of the support device with a correction function for soft rock tunnels of the present invention.

[0033] Figure 9 This is a schematic diagram of the three-dimensional structure of the locking assembly of the support device with a correction function for soft rock tunnels of the present invention.

[0034] In the above figures: 101: middle base, 102: moving base plate, 103: servo motor, 104: transmission assembly, 105: threaded shaft, 106: sliding block, 107: support frame, 108: electric hydraulic push rod, 109: sliding base, 110: limiting slider, 111: supporting main frame, 2: moving assembly, 201: fixed frame, 202: lifting shaft, 203: fixed rotating block, 204: pulley, 205: reversing block, 206: locking buckle, 3: self-locking assembly, 301: central rotating shaft, 30 2: Rotating rod, 303: Connecting block, 304: Transmission rod, 305: Bracket, 306: Self-locking block, 307: Self-locking spring, 4: Stretching component, 401: Fixed frame, 402: Adjusting grid, 403: Support shell, 404: Sliding inner shell, 405: Sliding support frame, 5: Auxiliary component, 501: Sliding support block, 502: Lifting screw, 503: Operating disk, 504: Lifting disk, 505: Discharge pipe, 6: Locking component, 601: Pull rope, 602: Locking spring, 603: Locking plug shaft. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with specific embodiments. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention. The left, right, front, and back that appear below are all in the same manner as in the appended drawings. Figure 1 The direction shown in is the reference, and the direction in which the support device moves along the tunnel is the front-to-back direction.

[0036] Example 1

[0037] A support device with a deviation correction function for soft rock tunnels, such as Figure 2-Figure 9 As shown, it includes oppositely distributed intermediate bases 101, and the left and right sides of the intermediate base 101 are slidably connected with movable base plates 102, and a stretching component 4 for adjusting the support spacing is fixedly connected between the intermediate bases 101. The stretching component 4 includes a fixed frame 401, and the fixed frame 401 is fixedly connected to the intermediate base 101. An adjustment grid 402 for changing the support spacing is provided on the fixed frame 401, and a support shell 403 is provided on the fixed frame 401. The interior of the support shell 403 is slidably connected to a sliding inner shell 404, and the sliding inner shell 404 is slidably connected to a sliding bracket 405 for supporting the auxiliary component 5, thereby increasing the adjustment range of the support spacing, and the movable base plate 102 is bolted to the movable component 2.

[0038] like Figure 3-Figure 5As shown, the moving component 2 includes a fixed frame 201, which is fixedly connected to the moving base plate 102, and a lifting shaft 202 is threadedly connected to the fixed frame 201. The lower end of the lifting shaft 202 is rotatably connected to a fixed rotating block 203, and the fixed rotating block 203 is rotatably connected to a pulley 204. A reversing block 205 for changing the direction of the pulley 204 is slidably connected to the fixed rotating block 203. The reversing block 205 facilitates the rapid movement of the moving base plate 102 to support the inner walls on both sides of the left and right sides through the reversing of the pulley 204, thereby increasing the temporary support efficiency. A locking buckle 206 for locking the pulley 204 is rotatably connected to the reversing block 205 to prevent the pulley 204 from automatically reversing. The rear end of the intermediate base 101 is fixedly connected to the servo motor 103, and the intermediate base 101 is rotatably connected to the threaded shaft 105. The output shaft of the servo motor 103 is connected to the screw thread 105. The cam 106 is connected to the upper and lower parts of the cam 107 so that the upper and lower parts of the cam 107 are in a fixed position, and the upper and lower parts of the cam 107 are in a fixed position, so that the upper and lower parts of the cam 107 are in a fixed position, and the upper and lower parts of the cam 107 are in a fixed position, so that the upper and lower parts of the cam 107 are in a fixed position, and the upper and lower parts of the cam 107 are in a fixed position, so that the upper and lower parts of the cam 107 are in a fixed position, and the upper and lower parts of the cam 107 are in a fixed position,

[0039] like Figure 6 As shown, the self-locking component 3 includes a central rotating shaft 301, which is fixedly connected to the intermediate base 101, and a rotating rod 302 is rotatably connected to the central rotating shaft 301. Both ends of the rotating rod 302 are hinged with connecting blocks 303, and the connecting block 303 is hinged with a transmission rod 304. The transmission rod 304 is slidably connected to a bracket 305, and the bracket 305 is fixedly connected to the intermediate base 101. A self-locking block 306 is fixedly connected to the transmission rod 304, and the self-locking block 306 is slidably connected to the support frame 107. A self-locking spring 307 is fixedly connected to the self-locking block 306, and the self-locking spring 307 is fixedly connected to the support frame 107. The self-locking component 3 cooperates with the support frame 107 to lock the support main frame 111 and stabilize the support force on the soft rock tunnel.

[0040] When the staff performs temporary support and anchor drilling work on the soft rock tunnel, the device is moved to the temporary support or anchor drilling position, and the two intermediate bases 101 are pushed in reverse to the support position according to the work requirements. During the pushing process, the adjustment grid 402 installed between the fixed frame 401 in the stretching component 4 begins to stretch, and the supporting shell 403 and the sliding inner shell 404 above the fixed frame 401 slide relative to each other to complete the adjustment of the support spacing. The intermediate base 101 drives the movable base plates 102 on the left and right sides and the support device above to the support position, and then changes the travel state of the movable component 2. The staff opens the locking buckle 206 used for locking, and then rotates the locking buckle 206 90° along the reversing groove on the movable base plate 102 to lock it. The buckle 206 drives the fixed rotating block 203 to rotate by driving the reversing block 205, thereby completing the steering of the pulley 204. The change of direction of the pulley 204 makes it easy for the mobile base plate 102 to move quickly to the left and right sides, temporarily support the two sides of the inner wall, and speed up the temporary support efficiency. Then the locking buckle 206 is pressed and locked to complete the reversal of the moving component 2, and then the servo motor 103 is started, and the threaded shaft 105 is driven to rotate through the transmission component 104. The rotation of the threaded shaft 105 drives the sliding block 106, and the sliding block 106 pushes the moving base plate 102 to open from the center to the left and right sides. After the moving base plate 102 contacts the side wall of the tunnel, the positioning and deviation correction of the center of the support device and the center of the tunnel are completed, and it serves to limit the left and right movement of the support device.

[0041] After the movable bottom plate 102 drives the support frame 107 to contact the side wall of the soft rock tunnel for temporary support, the servo motor 103 is turned off, and the staff operates the lifting shaft 202 to move upward. Since the fixed rotating block 203 is provided with a longitudinal slide groove, the locking effect of the locking buckle 206 will not be affected when the pulley 204 is lifted. The lifting shaft 202 drives the pulley 204 to move upward until the intermediate base 101 and the movable bottom plate 102 are fully applied to the ground, uniformly applying pressure to the ground of the soft rock tunnel. After the staff completes the adjustment of the support spacing, the electric hydraulic push rod 108 is turned on, and the electric hydraulic push rod 108 pushes the sliding base 109 to move upward, and the sliding base 109 drives the limit slider 110 to move upward uniformly, and the limit slider 110 moves along the support frame 1 When 07 slides, it drives the support main frame 111 to slide along the sliding base 109. During the upward movement of the sliding base 109, the limit slider 110 will drive the two support main frames 111 to move forward and upward until the docking is completed. During the docking process, the limit slider 110 begins to contact the self-locking block 306. At this time, the limit slider 110 drives the self-locking block 306 to compress the self-locking spring 307. After the self-locking spring 307 is compressed to the limit slider 110 and contacts the top of the support frame 107, the electric hydraulic push rod 108 is immediately closed, and the self-locking spring 307 rebounds and drives the self-locking block 306 to lock the limit slider 110. At this time, the two support main frames 111 complete the docking and temporarily support the top plate of the soft rock tunnel.

[0042] When evacuating this support device, the staff rotates the rotating rod 302, and the rotating rod 302 drives the transmission rod 304 through the connecting block 303. The transmission rod 304 drives the self-locking block 306 to compress the self-locking spring 307 to release the locking limit of the limit slider 110. At the same time, the electric hydraulic push rod 108 is turned on to drive the sliding base 109 to reset, and then the electric hydraulic push rod 108 is closed. The staff uses the tool to reset the lifting shaft 202, and then turns on the servo motor 103 to drive the moving base plate 102 to reset, and then turns off the servo motor 103. After the staff resets the moving component 2, it pushes the intermediate base 101 to reset, and repeats the above actions when performing temporary support again.

[0043] Example 2

[0044] On the basis of Example 1, Figure 7-Figure 9As shown, the auxiliary component 5 includes a sliding support block 501, which is slidably connected to the sliding support frame 405, and the sliding support block 501 is threadedly connected to a lifting screw 502, and the lower end of the lifting screw 502 is fixedly connected to an operating disk 503, and the lifting screw 502 is fixedly connected to a lifting disk 504, and a feeding pipe 505 for recycling drilling waste is welded on the lifting disk 504, and a locking component 6 for locking is slidably connected to the sliding support block 501, and a through hole slidably connected to the locking component 6 is provided on the sliding support frame 405, and the locking component 6 includes a pull rope 601, which is slidably connected to the sliding support block 501, and the pull rope 601 is fixedly connected to a locking plug shaft 603, and a locking spring 602 is fixedly connected between the locking plug shaft 603 and the sliding support block 501.

[0045] After the temporary support of the soft rock tunnel is completed, the staff starts anchor drilling. The staff installs the drilling device to the center position of the lifting plate 504. The staff controls the sliding support block 501 and the sliding support frame 405 to slide along the sliding inner shell 404 through the operating plate 503 to determine the longitudinal position of the anchor drilling. Then, the staff pulls the pull rope 601 to compress the locking spring 602. The compression of the locking spring 602 drives the locking plug shaft 603 to disengage from the cooperation of the sliding support frame 405. At the same time, the staff controls the sliding support block 501 to slide along the sliding support frame 405 through the operating plate 503 to determine the horizontal position of the drilling. After the anchor drilling position is determined, the staff controls the lifting plate 504 to rise to close contact with the top plate of the soft rock tunnel by turning the operating plate 503, and then starts the drilling device. The drilling waste and dust generated during the anchor drilling are discharged along the discharge pipe 505 and collected. After the anchor drilling is completed, the staff resets the sliding support block 501 and the lifting plate 504, and then carries out the evacuation of the above-mentioned support device.

[0046] Example 3

[0047] On the basis of Example 2, Figure 1 As shown, combined with Figure 2-Figure 9 A method for supporting the roof of a water-rich soft rock roadway comprises the following steps:

[0048] S1: When the staff is carrying out temporary support and anchor drilling work in the soft rock tunnel, they push the middle base 101 at both ends in the opposite direction according to the work requirements, and drive the adjusting grid 402 to stretch and the support outer shell 403 and the sliding inner shell 404 to slide relative to each other. After completing the adjustment of the support spacing according to the work requirements, the moving component 2 changes the travel state, and then starts the servo motor 103 to drive the sliding block 106 to move linearly through the transmission, and drives the moving bottom plate 102 to open to both sides to the full state, and immediately turns off the servo motor 103. At this time, the support frame 107 applies support force to both sides of the soft rock tunnel, and then the staff operates the lifting shaft 202 to move upward, and the lifting shaft 202 drives the pulley 204 to move upward, so that the middle base 101 and the moving bottom plate 102 are fully applied to the ground;

[0049] S2: After step S1 is completed, the electric hydraulic push rod 108 is turned on to push the sliding base 109 to move upward. When the sliding base 109 moves upward, it will drive the limiting slider 110 to dock the two supporting main frames 111. When the limiting slider 110 contacts the self-locking block 306, the limiting slider 110 drives the self-locking block 306 to compress the self-locking spring 307. After the self-locking spring 307 is compressed to the limit slider 110 and contacts the top of the support frame 107, the electric hydraulic push rod 108 is immediately closed. The self-locking spring 307 rebounds and drives the self-locking block 306 to lock the limit slider 110, thereby completing the temporary support of the tunnel.

[0050] S3: After step S2 is completed, the staff starts to perform anchor drilling. The staff installs the drilling device to the center position of the lifting plate 504. The staff controls the sliding support block 501 and the sliding support frame 405 to slide along the sliding inner shell 404 through the operating plate 503 to determine the longitudinal position of the anchor drilling. Then the staff releases the lock of the sliding support block 501 by the locking assembly 6. At the same time, the staff controls the sliding support block 501 to slide along the sliding support frame 405 through the operating plate 503 to determine the horizontal position of the anchor drilling. After the drilling position is determined, the staff controls the lifting plate 504 to rise to close contact with the roof of the soft rock tunnel by turning the operating plate 503, and then starts the drilling device. The drilling waste and dust generated during drilling are discharged along the discharge pipe 505 and collected;

[0051] S4: After the anchor drilling is completed and the anchoring construction is carried out, after the anchoring construction, the staff will reset the sliding support block 501 and the lifting plate 504, and then the staff will rotate the rotating rod 302, and the rotating rod 302 will drive the transmission rod 304 through the connecting block 303, and the transmission rod 304 will drive the self-locking block 306 to compress the self-locking spring 307 to release the locking limit of the limit slider 110, and at the same time turn on the electric hydraulic push rod 108 to drive the sliding base 109 to reset, and then turn off the electric hydraulic push rod 108, the staff will operate the lifting shaft 202 to reset, and then turn on the servo motor 103 to drive the moving base plate 102 to reset, and then turn off the servo motor 103. After the staff resets the moving component 2, it pushes the intermediate base 101 to reset.

[0052] It should be understood that the above description is only for illustrative purposes and is not intended to limit the present invention. Those skilled in the art will appreciate that variations of the present invention will fall within the scope of the claims herein.

Claims

1. A roof support method for a water-rich soft rock roadway, characterized by: A support device with a deviation correction function for a soft rock tunnel is used. The device includes intermediate bases (101) distributed in opposite directions. Both sides of the intermediate bases (101) are slidably connected to movable base plates (102). A stretching assembly (4) for adjusting the support spacing is fixedly connected between the intermediate bases (101). An auxiliary assembly (5) for assisting workers in anchoring and drilling is slidably connected to the stretching assembly (4). A moving assembly (2) is provided on the movable base plate (102). A servo motor (103) is fixedly connected to one end of the intermediate base (101). A threaded shaft (105) is rotatably connected to the intermediate base (101). A transmission assembly (104) is provided between the output shaft of the servo motor (103) and the threaded shaft (105). A sliding block (106) slidably connected to the intermediate base (101) is threadedly connected to the threaded shaft (105). The movable base plate (102) is provided with a sliding block (106) on the inner side thereof. The movable block (106) is provided with an inclined groove with limited sliding cooperation, and a support frame (107) is provided on each movable base plate (102). The two support frames (107) on the movable base plates (102) on both sides of the middle base (101) are symmetrically distributed in the center. An electric hydraulic push rod (108) is provided inside the support frame (107), and a sliding base (109) is provided on the electric hydraulic push rod (108). A limited sliding block (110) is slidably connected to the sliding base (109). The support frame (107) and the limited sliding block (110) are limitedly slidably connected. One end of the limited sliding block (110) is fixedly connected to the support main frame (111). A self-locking component (3) for stabilizing the support force is provided on the support frame (107). The self-locking component (3) cooperates with the support frame (107) to lock the support main frame (111) to stabilize the support force of the soft rock tunnel. The moving assembly (2) includes a fixed frame (201), the fixed frame (201) is fixedly connected to the moving base plate (102), a lifting shaft (202) is threadedly connected to the fixed frame (201), a fixed rotating block (203) is provided at one end of the lifting shaft (202), and the fixed rotating block (203) is rotatably connected to a pulley (204); The self-locking component (3) includes a central rotating shaft (301), the central rotating shaft (301) is fixedly connected to the middle base (101), a rotating rod (302) is rotatably connected to the central rotating shaft (301), both ends of the rotating rod (302) are hinged with connecting blocks (303), the connecting blocks (303) are hinged with a transmission rod (304), the transmission rod (304) is slidably connected to a bracket (305), the bracket (305) is fixedly connected to the middle base (101), a self-locking block (306) is fixedly connected to the transmission rod (304), the self-locking block (306) is slidably connected to the support frame (107), a self-locking spring (307) is fixedly connected to the self-locking block (306), and the self-locking spring (307) is fixedly connected to the support frame (107); The stretching assembly (4) includes a fixed frame (401), the fixed frame (401) is fixedly connected to the intermediate base (101), an adjustment grid (402) for changing the support spacing is provided on the fixed frame (401), a support shell (403) is provided on the fixed frame (401), a sliding inner shell (404) is slidably connected to the interior of the support shell (403), and the sliding inner shell (404) is slidably connected to a sliding support frame (405) for supporting the auxiliary assembly (5); The auxiliary component (5) includes a sliding support block (501), the sliding support block (501) is slidably connected to the sliding support frame (405), the sliding support block (501) is threadedly connected to a lifting screw (502), the lower end of the lifting screw (502) is fixedly connected to an operating disk (503), the lifting screw (502) is fixedly connected to a lifting disk (504), the lifting disk (504) is provided with a feeding pipe (505) for recovering drilling waste, and the sliding support block (501) is slidably connected to a locking component (6) for locking; The method comprises the following steps: S1: When the staff is carrying out temporary support and anchoring drilling work in the soft rock tunnel, they push the middle base (101) at both ends in the opposite direction according to the work requirements, and drive the adjustment grid (402) to stretch and the support outer shell (403) and the sliding inner shell (404) to slide relative to each other. After completing the adjustment of the support spacing according to the work requirements, the moving component (2) changes the travel state, and then the servo motor (103) is started to drive the sliding block (106) to move linearly through the transmission, and drive the moving bottom plate (102) to open to the full state in the direction away from the middle base (101) on both sides, and immediately turn off the servo motor (103). At this time, the support frame (107) applies support force to both sides of the soft rock tunnel, and then the staff operates the lifting shaft (202) to move upward, and the lifting shaft (202) drives the pulley (204) to move upward, so that the middle base (101) and the moving bottom plate (102) are fully applied to the ground; S2: After the adjustment of the support spacing is completed, the electric hydraulic push rod (108) is turned on to push the sliding base (109) to move upward. The sliding base 109 drives the limit slider 110 to move upward uniformly. The limit slider 110 slides along the support frame 107 and drives the support main frame 111 to slide longitudinally along the lane on the sliding base 109. When the sliding base (109) moves upward, it drives the limit slider (110) to make the two support main frames (111) dock. When the limit slider When the block (110) contacts the self-locking block (306), the limiting slider (110) drives the self-locking block (306) to compress the self-locking spring (307). After the self-locking spring (307) is compressed until the limiting slider (110) contacts the top of the support frame (107), the electric hydraulic push rod (108) is immediately closed, and the self-locking spring (307) rebounds to drive the self-locking block (306) to lock the limiting slider (110), thereby completing the temporary support of the soft rock roadway roof; S3: After the temporary support of the soft rock tunnel is completed, the staff starts to carry out anchor grouting drilling. The staff installs the drilling device to the center position of the lifting plate (504). The staff controls the sliding support block (501) and the sliding support frame (405) to slide along the sliding inner shell (404) through the operating plate (503) to determine the longitudinal position of the anchor grouting drilling. Then the staff releases the locking assembly (6) on the sliding support block (501). At the same time, the staff controls the sliding support block (501) to slide along the sliding support frame (405) to determine the transverse position of the anchor grouting drilling. After the drilling position is determined, the staff controls the lifting plate (504) by rotating the operating plate (503) to rise until it is in close contact with the top plate of the soft rock tunnel. Then, the drilling device is turned on. The drilling waste and dust generated during drilling are discharged along the discharge pipe (505) and collected. S4: After the anchor drilling is completed and the anchoring construction is carried out, after the anchoring construction, the staff resets the sliding support block (501) and the lifting plate (504), and then the staff rotates the rotating rod (302), and the rotating rod (302) drives the transmission rod (304) through the connecting block (303), and the transmission rod (304) drives the self-locking block (306) to compress the self-locking spring (307) to release the locking limit of the limit slider (110), and at the same time, the electric hydraulic push rod (108) is turned on to drive the sliding base (109) to reset, and then the electric hydraulic push rod (108) is turned off. The staff operates the lifting shaft (202) to reset, and then turns on the servo motor (103) to drive the moving base plate (102) to reset, and then turns off the servo motor (103). After the staff resets the moving component (2), it pushes the intermediate base (101) to reset.

2. A roof support method for a water-rich soft rock roadway according to claim 1, characterized in that: The upper side surface of the supporting main frame (111) is configured as an arc-shaped structure with the same arc as the top plate of the soft rock roadway.

3. The roof support method for a water-rich soft rock roadway according to claim 1, wherein: A reversing block (205) for changing the traveling direction of the pulley (204) is slidably provided on the fixed rotating block (203), and a locking buckle (206) for locking the pulley (204) is rotatably connected to the reversing block (205).

4. The roof support method for a water-rich soft rock roadway according to claim 1, wherein: The sliding support (405) is provided with through holes at equal intervals in the circumferential direction for limited sliding engagement with the locking assembly (6).

5. The roof support method for a water-rich soft rock roadway according to claim 1, wherein: The locking assembly (6) includes a pull rope (601), the pull rope (601) is slidably connected to the sliding support block (501), the pull rope (601) is fixedly connected to a locking plug shaft (603), and a locking spring (602) is fixedly connected between the locking plug shaft (603) and the sliding support block (501).

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