A deformation-targeted construction method for steeply inclined bedding rock tunnels

Abstract

The present invention relates to the technical field of tunnel engineering, and in particular to a deformation targeted construction method for a steeply inclined bedding surrounding rock tunnel, comprising the following steps: obtaining rock samples; loading the rock samples and obtaining broken rock samples after crushing, and calculating the elastic modulus of the broken rock samples; designing a scheme for anchor support of the tunnel according to the calculation results; and performing deformation targeted construction of the steeply inclined bedding surrounding rock tunnel based on the anchor support scheme, wherein before the targeted construction of the tunnel is performed, loading the rock samples and obtaining broken rock samples after crushing, and calculating the elastic modulus of the broken rock samples, and then designing a scheme for anchor support of the tunnel according to the calculation results, a more accurate reinforcement scheme for the entire tunnel can be obtained, thereby improving the construction efficiency during the deformation targeted construction of the steeply inclined bedding surrounding rock tunnel.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel engineering, and in particular to a deformation targeted construction method for a steeply inclined bedding surrounding rock tunnel. Background Art

[0002] The deformation-targeted construction method for steeply inclined bedding surrounding rock tunnels is a method for targeted design and construction of deformation problems that may occur during the excavation of soft rock tunnels. This method mainly relies on the analysis of the deformation characteristics of the surrounding rock, as well as monitoring and early warning during the excavation process, so as to take timely measures to control and reduce the degree of damage to the surrounding rock deformation. The existing technology still has shortcomings. For example, the elastic modulus of the tunnel rock layer is difficult to accurately determine during tunnel construction, which has caused great difficulties for the subsequent tunnel reinforcement.

[0003] However, the prior art still has shortcomings in the construction process. For example, patent number: CN105065032A is a large-section tunnel support system construction method suitable for steep layered rock mass. When excavating the forward-inclined layer guide tunnel and the upper middle guide tunnel, temporary support and the first and second layers of lining are applied at the positions of the forward-inclined layer guide tunnel and the upper middle guide tunnel; when excavating the reverse-inclined layer guide tunnel and the lower guide tunnel, temporary support and the first layer of lining are applied at the positions of the reverse-inclined layer guide tunnel and the lower guide tunnel. It is impossible to quickly determine the tunnel reinforcement plan according to the rock state of the tunnel, which affects the subsequent construction steps and leads to low construction efficiency. Summary of the invention

[0004] The invention provides a deformation targeted construction method for a steeply inclined bedding surrounding rock tunnel, which is used to solve the problem raised by the background technology.

[0005] In order to achieve the above-mentioned invention object, the present invention provides the following technical solution: a deformation targeted construction method for a steeply inclined bedding surrounding rock tunnel, comprising the following steps:

[0006] Obtain rock samples;

[0007] Loading the rock sample and obtaining the broken rock sample after breaking, and calculating the elastic modulus of the broken rock sample;

[0008] Design the bolt support scheme for the tunnel based on the calculation results;

[0009] Deformation-targeted construction of steeply inclined bedding surrounding rock tunnels based on anchor support scheme.

[0010] Preferably, the method for obtaining rock formation samples comprises: sampling surrounding rocks of multiple tunnel sections to be constructed, and obtaining primary rock formation samples of the sections to be constructed;

[0011] The primary formation sample is processed into a formation sample.

[0012] Preferably, when the primary rock formation sample is processed into a rock formation sample, a stone cutter is used to cut the primary rock formation sample into multiple rock formation samples, and a grinder is used to grind the rock formation sample. When the diameter of the rock formation sample after grinding is 50 mm and the height is 30 mm, the grinding of the rock formation sample is completed, wherein the surrounding rock is sampled by a coring machine.

[0013] Preferably, after the rock sample is loaded and the broken rock sample is obtained, before the elastic modulus of the broken rock sample is calculated, a resistance strain gauge is pasted to the end of the rock sample to form an experimental sample.

[0014] Preferably, after the resistance strain gauge is pasted on the end of the rock sample to form an experimental sample, the experimental sample is moved into a universal testing machine, the resistance strain gauge and the static strain resistor are connected by a wire, and the universal testing machine is started to apply a load to the experimental sample.

[0015] Preferably, the method for applying the load by the universal testing machine is a one-time continuous loading application method, and the loading rate is controlled at 0.1 KN / s.

[0016] Preferably, after designing the anchor support scheme for the tunnel according to the calculation results, the positions of all anchor holes in the tunnel section to be constructed are determined, and positioning holes representing the positions of the anchor holes are drilled on the inner wall of the tunnel using an anchor drilling rig.

[0017] Preferably, after the positioning hole representing the position of the anchor hole is drilled in the inner wall of the tunnel, the moving device is adjusted to allow the sealing ring to seal the positioning hole, and the anchor drilling machine is started to drill the positioning hole to obtain the anchor hole.

[0018] Preferably, the anchor drilling rig comprises: a mounting seat, a slide, a casing, a drill pipe, a sealing ring and a cutting assembly, the mounting seat is arranged on the moving mechanism, the mounting seat is slidably connected to the slide, a rack is provided on the side of the slide, the rack is meshed with the gear, the gear is connected to the output end of the driving motor, the driving motor is arranged on the mounting seat, the motor output end on the slide is connected to one end of the drill pipe, the drill pipe is rotatably connected to the casing on the slide, a sealing ring is provided on the mounting seat to seal the positioning hole, the center hole of the sealing ring cooperates with the drill pipe set, and a cutting assembly is provided at the other end of the drill pipe to drill the positioning hole.

[0019] Preferably, the cutting assembly includes: a cutter, an adjusting column, a reset spring and a flushing hole, the drill pipe side wall is provided with a plurality of cutter grooves, a cutter is slidably connected in the cutter groove, the end of the cutter outside the drill pipe is frictionally matched with the positioning hole, a mounting hole is provided on the top surface of the cutter, one end of the flushing hole is provided on the side wall of the mounting hole, the other end of the flushing hole is provided on the end surface of the cutter outside the drill pipe, the bottom wall of the mounting hole is connected to the bottom end of the adjusting column through a reset spring, the adjusting column is slidably connected to the mounting hole, a liquid inlet groove is provided on the top of the adjusting column, the liquid inlet groove is arranged in the drill pipe, an adjusting hole is provided on the side wall of the liquid inlet groove, the adjusting hole is arranged in the mounting hole, the cutter is connected to the telescopic mechanism, and the telescopic mechanism is installed on the top of the cutter.

[0020] The beneficial effects of the present invention are as follows:

[0021] In the scheme of the present invention:

[0022] By loading the rock samples and obtaining the broken rock samples before the targeted construction of the tunnel, calculating the elastic modulus of the broken rock samples, and then designing the anchor support scheme for the tunnel based on the calculation results, a more accurate reinforcement scheme for the entire tunnel can be obtained, thereby improving the construction efficiency during the targeted construction of deformation-oriented tunnels in steeply inclined bedding surrounding rocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a process flow chart of the present invention;

[0024] Figure 2 It is a schematic diagram of the main structure of the anchor drilling rig of the present invention;

[0025] Figure 3 For the present invention Figure 2 A partial enlarged view of the middle A;

[0026] Figure 4 It is a schematic diagram of the installation position of the sealing ring of the present invention;

[0027] Figure 5 For the present invention Figure 4 A partial enlarged view of point B in the middle;

[0028] Figure 6 A schematic diagram of the location of the pressure hole of the present invention;

[0029] Figure 7 For the present invention Figure 4 A partial enlarged view of point C in the middle;

[0030] Figure 8 It is a schematic diagram of the installation position of the rotating shaft of the present invention;

[0031] Fig. 9 For the present invention Figure 8 A partial enlarged view of point D in the middle;

[0032] Fig.10 is a cross-sectional view of a recovery pipe of the present invention;

[0033] Fig.11 For the present invention Fig.10 A partial enlarged view of point E in the middle.

[0034] Among them: anchor drilling rig 1, mounting seat 2, sliding seat 3, casing 4, drill pipe 5, sealing ring 6, cutting assembly 7, cutter 8, adjusting column 9, reset spring 10, flushing hole 11, rack 12, telescopic mechanism 13, telescopic groove 14, pressure pipe 15, second reset spring 16, pressure hole 17, second pressure pipe 18, sealing plate 19, second injection hole 20, transfer tube 21, adjusting tube 22, second adjusting column 23, third reset spring 24, guide hole 25, rotating shaft 26, recovery pipe 27, crushing column 28, filter disc 29, discharge pipe 30, auxiliary crushing column 31, pump housing 32, paddle 33, drive pipe 34, guide pipe 35, limit slider 36. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0036] Example: Reference Figure 1-Figure 11 , a deformation-targeted construction method for steeply inclined bedding surrounding rock tunnels, comprising the following steps:

[0037] Obtain rock samples;

[0038] Loading the rock sample and obtaining the broken rock sample after breaking, and calculating the elastic modulus of the broken rock sample;

[0039] Design the bolt support scheme for the tunnel based on the calculation results;

[0040] Deformation-targeted construction of steeply inclined bedding surrounding rock tunnels based on anchor support scheme.

[0041] The principles and beneficial effects of the above scheme are:

[0042] First, rock samples of the tunnel are obtained, and then loads are applied to the rock samples to obtain broken rock samples after crushing, the elastic modulus of the broken rock samples is calculated, and the anchor support scheme of the tunnel is designed according to the calculation results. Deformation targeted construction of steeply inclined bedding surrounding rock tunnels is carried out based on the anchor support scheme. Before the targeted construction of the tunnel, loads are applied to the rock samples to obtain broken rock samples after crushing, the elastic modulus of the broken rock samples is calculated, and then the anchor support scheme of the tunnel is designed according to the calculation results. A more accurate reinforcement scheme for the entire tunnel can be obtained, thereby improving the construction efficiency during deformation targeted construction of steeply inclined bedding surrounding rock tunnels.

[0043] The method for obtaining rock formation samples includes: sampling surrounding rocks of multiple tunnel sections to be constructed and obtaining primary rock formation samples of the sections to be constructed;

[0044] The primary formation sample is processed into a formation sample.

[0045] The principles and beneficial effects of the above scheme are:

[0046] Sampling the surrounding rocks of multiple tunnel sections to be constructed and obtaining primary rock samples of the sections to be constructed can more accurately obtain primary rock samples of the tunnel sections to be constructed, avoid missing primary rock samples of the tunnel sections to be constructed, and improve the accuracy of plan formulation.

[0047] The primary rock samples were cut into multiple rock samples using a stone cutter, and each sample was tested during the experiment, which improved the accuracy of the data obtained after the test. The rock samples were polished using a grinder, and all the rock samples were processed to the same parameters, which further improved the accuracy of the experimental results.

[0048] When the primary rock formation sample is processed into a rock formation sample, a stone cutter is used to cut the primary rock formation sample into multiple rock formation samples, and a grinder is used to grind the rock formation sample. When the diameter of the rock formation sample after grinding is 50 mm and the height is 30 mm, the grinding of the rock formation sample is completed. Among them, the surrounding rock is sampled by a coring machine.

[0049] The principles and beneficial effects of the above scheme are:

[0050] By using a stone cutter to cut the primary rock sample into multiple rock samples, the lateral data of the tunnel surrounding rock can be obtained more accurately. At the same time, by processing multiple rock samples at one time, a backup of samples is provided for the experiment to avoid the loss of experimental data due to the loss of samples during the test. When the rock sample is ground with a stone grinder, its diameter is processed to 50mm and the height is 30mm. By unifying the volume parameters of the rock sample, the same load is used for the experiment when the rock sample is loaded with a universal testing machine. When the diameter of the rock sample is 50mm and the height is 30mm, the experiment takes the shortest time, which is convenient for quickly obtaining the elastic modulus parameters of the entire tunnel.

[0051] Using a coring machine when sampling surrounding rock can improve sampling efficiency.

[0052] The rock sample is loaded and the broken rock sample is obtained. Before the elastic modulus of the broken rock sample is calculated, the resistance strain gauge is pasted on the end of the rock sample to form an experimental sample.

[0053] The principles and beneficial effects of the above scheme are:

[0054] Before loading, the resistance strain gauge is pasted on the end of the rock sample to form an experimental sample. The current change generated when the resistance strain gauge is subjected to pressure is used as an electrical signal, which can more intuitively reflect the change of the rock sample after the applied load, and thus obtain a more accurate elastic modulus of the rock sample.

[0055] After the resistance strain gauge is attached to the end of the rock sample to form the experimental sample, the experimental sample is moved into the universal testing machine, the resistance strain gauge and the static strain resistor are connected by wires, and the universal testing machine is started to apply load to the experimental sample. The principle and beneficial effects of the above scheme are:

[0056] The resistance strain gauge is pasted on the end of the rock sample to form an experimental sample, and the experimental sample is connected to the static strain resistor using a wire. The experimental sample is placed in a universal testing machine, and then the load is applied to the experimental sample. During the test, the model of the universal testing machine is: YAD-1000, and the model of the static strain resistor is: ST2258C. The load is applied to the experimental sample through the universal testing machine to prevent the rock debris splashed by the sample from causing harm to the experimenter during the load application process.

[0057] The method for applying the load by the universal testing machine is a one-time continuous loading application method, and the loading rate is controlled at 0.1 KN / s.

[0058] The principles and beneficial effects of the above scheme are:

[0059] The method of applying load by the universal testing machine is a one-time continuous loading method, and the loading rate is controlled at 0.1KN / s. When the load loading rate is controlled at 0.1KN / s, it ensures that the test sample will not break quickly, resulting in the failure of the experiment.

[0060] After the anchor support scheme of the tunnel is designed according to the calculation results, the positions of all anchor holes in the tunnel section to be constructed are determined, and positioning holes representing the positions of the anchor holes are drilled on the inner wall of the tunnel using the anchor drilling machine 1.

[0061] The principles and beneficial effects of the above scheme are:

[0062] Determine the anchor support position, use the anchor drill 1 to drill a positioning hole on the inner wall of the tunnel. According to the design plan, use the anchor drill 1 to drill the required hole in the form of a positioning hole in advance, so that the on-site construction personnel can quickly confirm the placement of other construction equipment on the construction site, and at the same time, they can reasonably design other subsequent construction plans based on the position of the positioning hole.

[0063] After drilling a positioning hole representing the position of the anchor hole on the inner wall of the tunnel, the moving device is adjusted to allow the sealing ring 6 to seal the positioning hole, and the anchor drilling machine 1 is started to drill the positioning hole to obtain the anchor hole. The principle and beneficial effects of the above scheme are:

[0064] After all the positioning holes are drilled, the position, height and angle of the mobile device in the tunnel are adjusted, and the sealing ring 6 seals the positioning holes in advance accordingly, so as to quickly perform the subsequent drilling of the anchor holes.

[0065] The anchor drilling machine 1 includes: a mounting seat 2, a slide seat 3, a casing 4, a drill pipe 5, a sealing ring 6 and a cutting assembly 7. The mounting seat 2 is arranged on a moving mechanism, and the slide seat 3 is slidably connected to the mounting seat 2. A rack 12 is installed on the side of the slide seat 3, and the rack 12 is meshed with a gear. The gear is connected to the output end of the driving motor. The driving motor is arranged on the mounting seat 2, and the motor output end on the slide seat 3 is connected to one end of the drill pipe 5. The drill pipe 5 is rotatably connected to the casing 4 on the slide seat 3. A sealing ring 6 is provided on the mounting seat 2 to seal the positioning hole. The center hole of the sealing ring 6 is fitted with the drill pipe 5, and a cutting assembly 7 is provided at the other end of the drill pipe 5 to drill the positioning hole.

[0066] The principles and beneficial effects of the above scheme are:

[0067] After the sealing ring 6 seals the positioning hole, the motor is started to rotate to drive the drill pipe 5 to rotate. The drill pipe 5 is connected to the casing 4 in rotation. The motor and the casing 4 are installed on the slide 3, which can improve the stability of the drill pipe 5 when rotating. The rotation of the drill pipe 5 drives the cutting assembly 7 to drill the positioning hole. The driving motor is started to rotate forward to drive the gear to rotate forward. The gear drives the rack 12 meshed with it to move toward the positioning hole. The rack 12 drives the slide 3 connected with it to move toward the positioning hole on the mounting seat 2, so that the cutting assembly 7 increases the drilling depth of the positioning hole. When the drilling of the positioning hole is completed, the driving motor is reversed to drive the gear to reverse. The gear drives the rack 12 to move in the direction outside the positioning hole, so that the cutting assembly 7 at the end of the drill pipe 5 is removed from the positioning hole. By arranging the driving motor on the mounting seat 2, the installation space of the structure is saved.

[0068] The sealing ring 6 is provided to seal the positioning hole, thereby preventing rock debris generated during drilling from falling outside the positioning hole, and at the same time avoiding smoke and dust generated by the falling of debris, thereby improving the cleanliness of the construction site.

[0069] The cutting assembly 7 includes: a cutter 8, an adjusting column 9, a reset spring 10 and a flushing hole 11. The side wall of the drill pipe 5 is provided with a plurality of cutter grooves, in which the cutter 8 is slidably connected, and the end of the cutter 8 placed outside the drill pipe 5 is frictionally matched with the positioning hole. A mounting hole is provided on the top surface of the cutter 8, and one end of the flushing hole 11 is provided on the side wall of the mounting hole, and the other end of the flushing hole 11 is provided on the end surface of the cutter 8 placed outside the drill pipe 5. The bottom wall of the mounting hole is connected to the bottom end of the adjusting column 9 through the reset spring 10, and the adjusting column 9 is slidably connected to the mounting hole. A liquid inlet groove is provided on the top of the adjusting column 9, and the liquid inlet groove is arranged in the drill pipe 5. An adjusting hole is provided on the side wall of the liquid inlet groove, and the adjusting hole is arranged in the mounting hole. The cutter 8 is connected to a telescopic mechanism 13, and the telescopic mechanism 13 is installed on the top of the cutter 8.

[0070] The principles and beneficial effects of the above scheme are:

[0071] The rotation of the drill pipe 5 drives the cutter 8 to rotate, and the cutter 8 drills the positioning hole. While drilling, cooling water is injected from the drill pipe 5, and the cooling water enters the adjusting column 9 through the liquid inlet groove. The adjusting column 9 is subjected to the increased pressure of the cooling water and moves along the mounting hole toward the positioning hole. The movement of the adjusting column 9 compresses the reset spring 10. While the adjusting column 9 moves downward, the adjusting hole synchronously moves downward and conducts the flushing hole 11, so that the cooling water enters the positioning hole through the flushing hole 11. The addition of cooling water reduces the temperature of the cutter 8 while the device is drilling, thereby increasing the service life of the cutter 8.

[0072] When the rotation speed of the motor is increased, the supply of cooling water can be increased, so that the downward movement distance of the adjusting column 9 is increased, the conduction area between the adjusting hole on the side wall of the adjusting column 9 and the flushing hole 11 is increased, and the supply of cooling water entering the flushing hole 11 is synchronously increased, thereby improving the practicality of the mechanism;

[0073] When the drilling of the device is completed, the supply of cooling water is stopped, the water pressure on the liquid inlet groove of the adjusting column 9 becomes smaller, the reset spring 10 is reset, and the adjustment hole on the adjusting column 9 and the flushing hole 11 are no longer connected, preventing rock debris from entering the drill pipe 5 and damaging the device.

[0074] The telescopic mechanism 13 includes: a telescopic groove 14, a pressure tube 15, a second reset spring 16, a pressure hole 17, a second pressure tube 18 and a sealing plate 19. The side wall of the drill pipe 5 is provided with an annular groove, and the inner wall of the annular groove is provided with one end of a plurality of second mounting holes, and the other end of the second mounting hole is provided on the top wall of the cutter groove. The top surface of the cutter 8 is provided with a telescopic groove 14, and a pressure tube 15 is installed in the second mounting hole. The bottom end of the pressure tube 15 is placed in the telescopic groove. The side wall of the pressure tube 15 facing the center of the drill pipe 5 is provided with a sealing block, and the sealing block is slidably sealed with the telescopic groove. The sealing block is connected to the inner wall of the telescopic groove 14 through the second reset spring 16. A pressure hole 17 is provided on the other side wall of the pressure tube 15, and the pressure hole 17 is arranged in the telescopic groove. A second pressure hole is provided on the side wall of the casing 4, and the second pressure hole is arranged toward the annular groove. The second pressure hole is connected to the compressor through the second pressure tube 18. A sealing plate 19 is provided on the side wall of the drill pipe 5 to seal the top of the telescopic groove 14.

[0075] The principles and beneficial effects of the above scheme are:

[0076] The second pressure pipe 18, the annular groove and the pressure pipe 15 are filled with hydraulic oil. When the inner diameter of the anchor hole needs to be increased, the compressor is started to increase the pressure of the hydraulic oil in the pressure pipe 15 through the second pressure pipe 18. After the pressure of the hydraulic oil increases, the pressure of the hydraulic oil enters the telescopic groove 14 from the pressure hole 17 on the pressure pipe 15, so that the pressure between the pressure hole 17 and the inner wall of the telescopic groove 14 facing it increases, the second return spring 16 is compressed, and the cutter 8 moves away from the center of the drill pipe 5 to increase the inner diameter of the anchor hole; when drilling is completed, the compressor is started to reduce the pressure of the hydraulic oil in the pressure pipe 15, the pressure between the pressure hole 17 and the inner wall of the telescopic groove 14 facing it decreases, and while the second return spring 16 is reset, the cutter 8 is retracted into the drill pipe 5 to prevent the cutter 8 from being stuck in the anchor hole when the drill pipe 5 is taken out;

[0077] At the same time, the cutter 8 can be repeatedly moved in the cutter groove by controlling the hydraulic oil pressure between the pressure hole 17 and the inner wall of the telescopic groove 14 facing it. When the cutter 8 is stuck in the anchor hole, the rock stuck in the inner wall of the anchor hole by the cutter 8 can be quickly broken to remove the drill pipe 5;

[0078] The sealing plate 19 is provided to seal the top of the telescopic groove 14 to prevent leakage of the hydraulic oil in the telescopic groove 14, and to prevent cooling water or rock debris from entering the telescopic groove 14 when the drill pipe 5 is drilling. At the same time, the telescopic groove 14 can be quickly cleaned and maintained by disassembling and assembling the sealing plate 19, and the maintenance difficulty of the pressure pipe 15 can also be reduced.

[0079] The side wall of the pressure pipe 15 is provided with a sealing block, which improves the guiding effect of the cutter 8 in the cutter groove and prevents the hydraulic oil from entering the telescopic groove 14 where the second return spring 16 is located;

[0080] When there are rock fragments in the flushing hole 11, the motor is started to rotate to drive the drill pipe 5 to rotate, and the compressor is started to increase the pressure of the hydraulic oil, and then the pressure of the hydraulic oil is quickly reduced. Under the action of the elastic force of the second return spring 16, the cutter 8 can vibrate in the cutter groove. The rock fragments are discharged from the flushing hole 11 through multiple vibrations of the cutter 8 and the rotation of the drill pipe 5, thereby reducing the difficulty of cleaning the device.

[0081] A second annular groove is formed on the inner wall of the casing 4, and a liquid injection hole is formed on the side wall of the second annular groove. A plurality of second liquid injection holes 20 are formed on the side wall of the drill pipe 5, and the second liquid injection hole 20 is arranged toward the second annular groove, and the liquid injection hole is connected to the end of the transfer tube 21, and the other end of the transfer tube 21 is connected to the adjusting tube 22, and a second adjusting column 23 is slidably connected in the adjusting tube 22, and the bottom end of the second adjusting column 23 is connected to the bottom wall of the adjusting tube 22 through a third reset spring 24, and a guide hole 25 is formed through the second adjusting column 23, and the guide hole 25 is staggered with the end of the transfer tube 21, and the top end of the second adjusting column 23 is rotatably connected to the end of the rotating shaft 26, and the rotating shaft 26 is slidably connected in the circular hole on the top surface of the adjusting tube 22, and the other side of the adjusting tube 22 is connected to the water supply device through a pipeline.

[0082] The principles and beneficial effects of the above scheme are:

[0083] When the drill pipe 5 is drilling the positioning hole, the water supply device introduces cooling water into the adjusting pipe 22 through the pipeline, and the cooling water enters the transfer pipe 21 through the guide hole 25 opened through the second adjusting column 23. Then the transfer pipe 21 introduces the cooling water into the second injection hole 20, enters the drill pipe 5 through the second injection hole 20, and is discharged through the liquid inlet groove, the adjusting hole and the flushing hole 11. By opening the second injection hole 20 on the drill pipe 5, the side wall of the second annular groove is provided with an injection hole, and the injection hole is connected to the end of the transfer pipe 21, it is convenient to continuously supply cooling water to the drill pipe 5 when the drill pipe 5 rotates.

[0084] The rotating shaft 26 is slidably connected to the second circular hole at the end of the recovery pipe 27. The recovery pipe 27 is installed in the third positioning hole of the sealing ring 6. A plurality of crushing columns 28 are installed on the rotating shaft 26. A discharge pipe 30 is connected to the bottom end of the recovery pipe 27. A filter plate 29 is installed on the rotating shaft 26. The filter plate 29 is arranged between the crushing column 28 and the discharge pipe 30. A plurality of auxiliary crushing columns 31 are provided on the inner wall of the recovery pipe 27.

[0085] The end of the recovery pipe 27 is equipped with a pump casing 32, and a driving disk is arranged in the pump casing 32. A plurality of paddles 33 are arranged on the side wall of the driving disk. The paddles 33 are arranged in the pump casing 32. The pump casing 32 is connected to the transfer tube 21 through a driving tube 34. The bottom end of the pump casing 32 is connected to the discharge pipe 30 through a guide tube 35. The fourth positioning hole of the driving disk is plugged into and matched with the rotating shaft 26. A plurality of movable grooves are opened on the inner wall of the fourth positioning hole. A limiting slider 36 is slidably connected in the movable groove. The limiting slider 36 is installed on the side wall of the rotating shaft 26. The rotating shaft 26 is slidably connected to the fifth positioning hole of the pump casing 32.

[0086] The principles and beneficial effects of the above scheme are:

[0087] The recovery pipe 27 is installed in the third positioning hole of the sealing ring 6. The bottom end of the recovery pipe 27 is connected to a discharge pipe 30. The discharge pipe 30 is connected to the pump housing 32 through a guide pipe 35. When the drill pipe 5 is drilling, the rock fragments generated enter the recovery pipe 27 through the impact of cooling water. Since part of the cooling water in the transfer pipe 21 enters the pump housing 32 through the driving pipe 34, the cooling water impacts the blades 33 on the driving disk to rotate the driving disk. The fourth positioning hole of the driving disk is plug-matched with the rotating shaft 26. The inner wall of the fourth positioning hole is provided with a plurality of movable grooves. The movable grooves are slidably connected with a limiting slider 36. The limiting slider 36 is installed on the side wall of the rotating shaft 26. The rotation of the driving disk drives the rotating shaft 26 to rotate. The rotation of the rotating shaft 26 drives the crushing column 28 to rotate. The crushing column 28 cooperates with the auxiliary crushing column 31 to collect and crush the rock fragments entering the recovery pipe 27. The crushed rock fragments enter the discharge pipe 30 and are discharged.

[0088] A filter disc 29 is provided on the rotating shaft 26, and the filter disc 29 is provided between the discharge pipe 30 and the crushing column 28 to prevent the discharge pipe 30 from being blocked by large rock fragments when the rock fragments are collected and crushed;

[0089] When the diameter of the rock fragments in the recovery pipe 27 increases, the rock fragments block some of the filter holes on the filter disc 29, causing the pressure exerted by the cooling water on the filter disc 29 to increase, causing the filter disc 29 to move toward the adjustment pipe 22, and the filter disc 29 drives the rotating shaft 26 to move, and the rotating shaft 26 drives the second adjustment column 23 to move in the adjustment pipe 22, and the third return spring 24 in the adjustment pipe 22 is compressed, and the conduction area between the guide hole 25 on the second adjustment column 23 and the transfer pipe 21 is increased, thereby increasing the volume of cooling water discharged from the flushing hole 11, and the transfer pipe 21 is connected to the The flow rate of the cooling water in the driving pipe 34 when entering the pump housing 32 increases, the rotation speed of the blade 33 increases, and the crushing speed of the crushing column 28 on the rotating shaft 26 increases. At the same time, the flow rate of the cooling water entering the recovery pipe 27 increases, and some unbroken rock fragments are assisted to be flushed into the discharge pipe 30. Since the bottom end of the pump housing 32 is connected to the discharge pipe 30 through the guide pipe 35, the cooling water flowing in the discharge pipe 30 can increase the flow rate of the unbroken rock fragments therein while the pump housing 32 is discharging liquid, thereby preventing the discharge pipe 30 from being blocked.

[0090] A filter disc 29 is arranged on the rotating shaft 26. When the filter holes on the filter disc 29 are blocked by fine rock fragments, the fine rock fragments can be flushed by increasing the flow rate of the cooling water entering the recovery pipe 27. When the flushing is completed, the filter disc 29 is subjected to the vibration generated when the third reset spring 24 is reset, and the fine rock fragments in the filter holes are further vibrated to improve the cleaning effect of the filter holes. When there are rock fragments with larger diameters on the filter disc 29 at the same time, the filter disc 29 moves toward the regulating pipe 22, and the rock fragments with larger diameters move to the top of the discharge pipe 30. The filter fragments are subjected to the flow rate of the cooling water flowing into the discharge pipe 30 through the guide pipe 35, and the discharge pipe 30 generates a negative pressure, so that the rock fragments with larger diameters are sucked away.

[0091] Since the inner wall of the fourth positioning hole of the driving disk is provided with a plurality of moving grooves, a limit slider 36 is slidably connected in the moving groove, and the limit slider 36 is installed on the side wall of the rotating shaft 26, so the rotating shaft 26 can reciprocate in the recovery pipe 27, and the rotation of the driving disk can drive the moving groove to rotate, and the rotation of the moving groove drives the limit slider 36 and the rotating shaft 26 to rotate synchronously;

[0092] Since the end of the transfer tube 21 is connected to the regulating tube 22 , and the transfer tube 21 is connected to the pump housing 32 via the driving tube 34 , the fixing mechanism of the regulating tube 22 is reduced.

[0093] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A deformation-targeted construction method for steeply inclined bedding surrounding rock tunnels, characterized in that: The following steps are involved: Obtain rock samples; Loading the rock samples and obtaining the broken rock samples after breaking, and calculating the elastic modulus of the broken rock samples; Design the bolt support scheme for the tunnel based on the calculation results; Deformation-targeted construction of steeply inclined bedding surrounding rock tunnels based on bolt support scheme; The method for obtaining rock formation samples includes: sampling surrounding rocks of multiple tunnel sections to be constructed and obtaining primary rock formation samples of the sections to be constructed; processing primary rock formation samples into rock formation samples; When the primary rock formation sample is processed into a rock formation sample, a stone cutter is used to cut the primary rock formation sample into a plurality of rock formation samples, and a stone grinder is used to grind the rock formation sample. When the diameter of the rock formation sample after grinding is 50 mm and the height is 30 mm, the grinding of the rock formation sample is finished, wherein the surrounding rock is sampled by a coring machine; The rock sample is loaded and the broken rock sample is obtained, and before the elastic modulus of the broken rock sample is calculated, the resistance strain gauge is pasted on the end of the rock sample to form an experimental sample; After the resistance strain gauge is pasted on the end of the rock sample to form an experimental sample, the experimental sample is moved into a universal testing machine, the resistance strain gauge is connected to a static strain resistor through a wire, and the universal testing machine is started to apply a load to the experimental sample; The method for applying the load by the universal testing machine is a one-time continuous loading application method, and the loading rate is controlled at 0.1 KN / s.

2. A deformation-targeted construction method for steeply inclined bedding surrounding rock tunnel according to claim 1, characterized in that: After designing the anchor support scheme for the tunnel according to the calculation results, the positions of all anchor holes in the tunnel section to be constructed are determined, and positioning holes representing the positions of the anchor holes are drilled on the inner wall of the tunnel using an anchor drilling machine (1).

3. A deformation-targeted construction method for steeply inclined bedding surrounding rock tunnel according to claim 2, characterized in that: After a positioning hole representing the position of the anchor hole is drilled on the inner wall of the tunnel, the moving device is adjusted so that a sealing ring (6) seals the positioning hole, and the anchor drilling machine (1) is started to drill the positioning hole to obtain the anchor hole.

4. A deformation-targeted construction method for steeply inclined bedding surrounding rock tunnel according to claim 3, characterized in that: The anchor drilling machine (1) comprises: a mounting seat (2), a slide seat (3), a casing (4), a drill pipe (5), a sealing ring (6) and a cutting assembly (7); the mounting seat (2) is arranged on a moving mechanism; the mounting seat (2) is slidably connected with the slide seat (3); a rack (12) is arranged on the side of the slide seat (3); the rack (12) is meshed with a gear; the gear is connected to the output end of a driving motor; the driving motor is arranged on the mounting seat (2); the motor output end on the slide seat (3) is connected to one end of the drill pipe (5); the drill pipe (5) is rotatably connected to the casing (4) on the slide seat (3); a sealing ring (6) is arranged on the mounting seat (2) to seal the positioning hole; the center hole of the sealing ring (6) is fitted with the drill pipe (5); the other end of the drill pipe (5) is provided with a cutting assembly (7) to drill the positioning hole.

5. A deformation-targeted construction method for steeply inclined bedding surrounding rock tunnel according to claim 4, characterized in that: The cutting assembly (7) comprises: a cutter (8), an adjusting column (9), a reset spring (10) and a flushing hole (11); a plurality of cutter grooves are provided on the side wall of the drill pipe (5); a cutter (8) is slidably connected in the cutter groove; the end of the cutter (8) placed outside the drill pipe (5) is frictionally matched with the positioning hole; a mounting hole is provided on the top surface of the cutter (8); one end of the flushing hole (11) is provided on the side wall of the mounting hole; the other end of the flushing hole (11) is provided on the end surface of the cutter (8) placed outside the drill pipe (5); the bottom wall of the mounting hole is connected to the bottom end of the adjusting column (9) through the reset spring (10); the adjusting column (9) is slidably connected to the mounting hole; a liquid inlet groove is provided on the top of the adjusting column (9); the liquid inlet groove is arranged in the drill pipe (5); an adjusting hole is provided on the side wall of the liquid inlet groove; the adjusting hole is arranged in the mounting hole; the cutter (8) is connected to a telescopic mechanism (13); and the telescopic mechanism (13) is installed on the top of the cutter (8).

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