A tunnel exploration support anchor rod and a construction method thereof

Abstract

The application relates to the technical field of anchor rods and discloses a tunnel exploration supporting anchor rod and a construction method thereof. The anchor rod has certain cleaning capacity for an anchor rod slot hole, the quality requirement of the anchor rod slot hole is not high, the construction is more labor-saving, the anchor rod slot hole is not easy to deform in the process of inserting the anchor rod slot hole, the depth requirement of the anchor rod slot hole is not high, the anchor rod comprises an outer threaded cylinder and a threaded inner cylinder, the threaded inner cylinder is connected in the outer threaded cylinder, the threaded inner cylinder is connected with an end block, the end block is connected with multiple knife plates, multiple grout outlet holes are arranged in the threaded inner cylinder, two side grooves are arranged in the threaded inner cylinder, a bridge frame is arranged in the side grooves, the bridge frame is connected with a driving rod, a tension spring is arranged between the driving rod and the bridge frame, the outer threaded cylinder is connected with an inner threaded cylinder, the outer diameter of the inner threaded cylinder is smaller than that of the outer threaded cylinder, a threaded column is threadedly connected in the inner threaded cylinder, the threaded column is connected with an outer hexagonal driving block, the outer hexagonal driving block and the threaded column are both provided with a threaded inner hole, and a grouting nozzle is connected with the threaded inner hole.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of anchor rod, in particular to a kind of exploration tunnel support anchor rod and its construction method. BACKGROUND

[0002] It is known that exploration tunnel is a kind of tunnel for the purpose of survey, which is mainly used to find out the engineering geological conditions and hydrogeological conditions of the tunnel location and the influence of tunnel construction and operation protection, to provide the required survey data for planning, design and construction, so as to make the project more economical and reasonable and safe and reliable auxiliary tunnel. In order to ensure the safety and reliability of the exploration tunnel during construction, anchor rod grouting construction is usually carried out in the exploration tunnel.

[0003] The existing exploration tunnel support anchor rod comprises an outer threaded cylinder, a sealing disc pad and a threaded cap are arranged on the outer threaded cylinder, and a grouting nozzle is arranged in the outer threaded cylinder. In use, first, an anchor rod slot hole is drilled on the inner wall of the exploration tunnel, then the outer threaded cylinder is rotated and inserted into the anchor rod slot hole, the sealing disc pad is adjusted to contact the inner wall of the exploration tunnel by rotating the threaded cap, and finally the mortar is injected through the grouting nozzle and the pressure is appropriately maintained. However, the above-mentioned exploration tunnel support anchor rod can realize the support of the exploration tunnel, but during the construction of inserting the anchor rod slot hole, the anchor rod slot hole needs to be cleaned after drilling the anchor rod slot hole to avoid the residual debris of the anchor rod slot hole blocking the outer threaded cylinder, which causes difficulty in subsequent grouting construction, and the construction operation is more laborious. At the same time, when the anchor rod slot hole is uneven or collapses, the outer threaded cylinder is easily deformed or stuck, the practicability is poor, and the depth of the anchor rod slot hole needs to be strictly controlled during drilling, the construction precision requirement is high. SUMMARY

[0004] (I) Technical problems solved

[0005] In view of the shortcomings of the prior art, the present application provides an exploration tunnel support anchor rod and its construction method, which has a certain cleaning ability for the anchor rod slot hole, so the quality requirement for the anchor rod slot hole is not too high, the construction is more labor-saving, the structural strength is higher, the anchor rod slot hole is not easily deformed during insertion, the practicability is better, and the position between the threaded inner cylinder and the outer threaded cylinder can be adjusted according to the depth of the anchor rod slot hole, the depth requirement for the anchor rod slot hole is not high.

[0006] (II) Technical solutions

[0007] In order to achieve the above object, the present application provides the following technical scheme: a tunnel exploration supporting anchor rod, comprising an outer threaded cylinder, further comprising a threaded inner cylinder, the threaded inner cylinder is threadedly connected in the outer threaded cylinder, the right end of the threaded inner cylinder is fixedly connected with an end block, the end block is located at the right end of the outer threaded cylinder, the right end of the end block is fixedly connected with a plurality of knife plates, a plurality of grout outlets are formed in the threaded inner cylinder, the left end of the threaded inner cylinder is provided with two mutually symmetrical side grooves, a bridge is arranged in the side groove, a driving rod is slidably connected in the bridge, a tension spring is connected between the driving rod and the bridge, the left end of the outer threaded cylinder is fixedly connected with an inner threaded cylinder, the outer diameter of the inner threaded cylinder is smaller than that of the outer threaded cylinder, a threaded column matched with the driving rod is threadedly connected in the inner threaded cylinder, an outer hexagonal driving block is fixedly connected on the threaded column, a threaded inner hole is formed in the outer hexagonal driving block and the threaded column, and a grouting nozzle is threadedly connected in the threaded inner hole.

[0008] On the basis of the foregoing scheme, the bridge comprises two bridge rods and an intermediate mounting ring, the two bridge rods are respectively matched in the two side grooves, the intermediate mounting ring is fixedly connected between the two bridge rods, and the left end of the tension spring is fixedly connected with the intermediate mounting ring.

[0009] On the basis of the foregoing scheme, preferably, the driving rod comprises a round rod and two sliding strips, the round rod is slidably matched in the intermediate mounting ring, two guide grooves are symmetrically formed in the intermediate mounting ring, the two sliding strips are respectively slidably matched in the two guide grooves, and the two sliding strips are fixedly connected with the round rod.

[0010] On the basis of the foregoing scheme, further, the left and right ends of the round rod are respectively fixedly connected with a driving column and a limiting column, the right end of the tension spring is fixedly connected with the limiting column, and the left end of the driving column is in contact with the threaded column.

[0011] On the basis of the foregoing scheme, still further, a plurality of driving holes are equally angularly formed in the side wall of the driving column, a transition chamfer is arranged at the left end of the driving column, and a plurality of grouting grooves are arranged on the transition chamfer.

[0012] On the basis of the foregoing scheme, still further, the outer diameter of the end block is the same as that of the outer threaded cylinder.

[0013] As a further scheme of the foregoing scheme, the outer threaded cylinder is provided with a rubber sealing plug and a sealing gasket plate, an auxiliary adjusting nut is threadedly connected on the outer threaded cylinder, the sealing gasket plate is in contact with the auxiliary adjusting nut, and the rubber sealing plug is in contact with the sealing gasket plate.

[0014] A tunnel exploration supporting anchor rod and a construction method thereof, comprising the following steps:

[0015] S1, the construction method of the exploration tunnel support anchor rod is that first, the anchor rod slot hole is drilled on the inner wall of the exploration tunnel, then the exploration tunnel support anchor rod is rotated and inserted into the anchor rod slot hole, the rubber sealing plug is in contact with the slot hole of the anchor rod slot hole until the sealing pad is in contact with the exploration tunnel, the contact sealing of the outer thread cylinder and the anchor rod slot hole is realized through the deformation of the rubber sealing plug, and the installation of the outer thread cylinder is completed;

[0016] S2, after the installation of the exploration tunnel support anchor rod is completed, the threaded column is detached from the inner threaded cylinder, the tightening effect of the threaded column on the driving column is invalid, under the action of the tension spring, the round rod slides to the left relative to the middle mounting ring, the round rod slides to the left and pops out the driving column from the inner threaded cylinder, the auxiliary rod outside is inserted into the driving hole, the rotation of the driving column is realized through the lever principle, the round rod is rotated by the driving column, the middle mounting ring is rotated by the sliding strip, the threaded inner cylinder is rotated by the bridge rod, the threaded inner cylinder is stretched relative to the outer threaded cylinder, the threaded inner cylinder is stretched relative to the outer threaded cylinder, the slurry outlet hole is exposed, and the end block is pushed to the right, after the adjustment of the threaded inner cylinder relative to the outer threaded cylinder is completed, the threaded column is rotated into the inner threaded cylinder again.

[0017] S3, after the position adjustment of the threaded inner cylinder in the outer threaded cylinder is completed and the threaded column is installed in the inner threaded cylinder, grouting is carried out through the grouting nozzle, in the grouting process, the mortar is introduced into the threaded inner cylinder from the grouting groove, and flows out of the threaded inner cylinder through the slurry outlet hole on the threaded inner cylinder, realizing the grouting of the exploration tunnel, after the grouting is completed, the pressure is maintained, and after the pressure is reduced, the grouting and pressure maintaining are carried out again until the pressure no longer decreases.

[0018] S4, after the grouting and pressure maintaining are completed, the installation of the exploration tunnel support anchor rod is completed, and then the installation of other exploration tunnel support anchor rods is continued.

[0019] (Three) beneficial effects

[0020] Compared with the prior art, the present application provides an exploration tunnel support anchor rod and its construction method, which has the following beneficial effects:

[0021] 1. In the present application, the obstacles in the anchor rod slot hole are conveniently cleaned and pushed by the cooperation of the end block and the knife plate, which has a certain cleaning ability for the anchor rod slot hole, so that the quality requirement for the anchor rod slot hole is not too high, the outer threaded cylinder can pass through conveniently, and the construction is more convenient.

[0022] 2. In the present application, the cooperation of the outer threaded cylinder and the threaded inner cylinder makes the exploration tunnel support anchor rod have a double-layer wall cylinder, which can improve the structural strength of the exploration tunnel support anchor rod, the structural strength is higher, the deformation in the process of inserting into the anchor rod slot hole is not easy, the slurry outlet hole is convenient for grouting for the exploration tunnel, and the protection effect of the slurry outlet hole is better, and the practicability is better.

[0023] 3. The relative position between the threaded inner cylinder and the outer threaded cylinder can be adjusted according to the depth of the anchor rod slot, so that the overall length of the anchor rod for tunnel exploration support can be adjusted, the depth requirement of the anchor rod slot is not high, the grout hole can be easily explored, the threaded column can be easily installed, the grout nozzle can be easily installed, the driving rod can be easily pushed into the threaded inner cylinder, and the driving rod has good storage performance. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a sectional view of the three-dimensional structure of the application.

[0025] Figure 2 It is a sectional view of the three-dimensional structure of the application. Figure 1 It is a sectional view of the three-dimensional structure of the application.

[0026] Figure 3 It is a sectional view of the three-dimensional structure of the application.

[0027] Figure 4 It is a sectional view of the three-dimensional structure of the application.

[0028] Figure 5 It is a sectional view of the three-dimensional structure of the application.

[0029] In the figure: 1, outer threaded cylinder; 2, threaded inner cylinder; 3, end block; 4, knife plate; 5, grout hole; 6, tension spring; 7, inner threaded cylinder; 8, threaded column; 9, outer hexagonal driving block; 10, grout nozzle; 11, bridge rod; 12, middle mounting ring; 13, round rod; 14, slide bar; 15, driving column; 16, limiting column; 17, driving hole; 18, grouting slot; 19, rubber sealing plug; 20, sealing pad; 21, auxiliary adjusting nut. DETAILED DESCRIPTION

[0030] EMBODIMENT

[0031] Please refer to Figures 1-5The utility model provides an anchor rod for tunnel exploration support, including outer thread cylinder 1, still including thread inner cylinder 2, be provided with rubber sealing plug 19 and sealing pad 20 on outer thread cylinder 1, and the auxiliary adjusting nut 21 is threadedly connected on outer thread cylinder 1, and sealing pad 20 contacts with auxiliary adjusting nut 21, and rubber sealing plug 19 contacts with sealing pad 20, and the positioning and sealing between outer thread cylinder 1 and the inner wall of exploration tunnel are realized, and thread inner cylinder 2 is threadedly connected in outer thread cylinder 1, and by the cooperation of outer thread cylinder 1 and thread inner cylinder 2, the anchor rod for tunnel exploration support has double-wall cylinder, can improve the structural strength of the anchor rod for tunnel exploration support, structural strength is higher, is not easy to deform in the process of inserting anchor rod slot hole, and the right end of thread inner cylinder 2 is fixedly connected with end block 3, and end block 3 is located at the right end of outer thread cylinder 1, and the outer diameter of end block 3 is same with the outer diameter of outer thread cylinder 1, so that the area cleaned by end block 3 can allow the smooth passage of outer thread cylinder 1, and the right end of end block 3 is fixedly connected with multiple cutter plates 4, and the cooperation of end block 3 and cutter plate 4 facilitates the cleaning and pushing of the obstacle in anchor rod slot hole, and has certain cleaning capacity to anchor rod slot hole, so that the quality requirement of anchor rod slot hole is not too high, and the passage of outer thread cylinder 1 is convenient, and construction is more convenient, and multiple slurry outlet holes 5 are set up on thread inner cylinder 2, and the setting up of slurry outlet hole 5 facilitates grouting for exploration tunnel, and the protection effect of slurry outlet hole 5 is better, and the practicality is better.

[0032] It also needs to be further explained that the left end of the threaded inner barrel 2 is provided with two mutually symmetrical edge grooves, a bridge is arranged in the edge groove, a driving rod is slidably connected in the bridge, a tension spring 6 is connected between the driving rod and the bridge, the bridge includes two bridge rods 11 and an intermediate mounting ring 12, the two bridge rods 11 are respectively matched in the two edge grooves, the intermediate mounting ring 12 is fixedly connected between the two bridge rods 11, the left end of the tension spring 6 is fixedly connected with the intermediate mounting ring 12, which is convenient for the installation of the driving rod, the left end of the outer threaded barrel 1 is fixedly connected with an inner threaded barrel 7, the outer diameter of the inner threaded barrel 7 is smaller than the outer diameter of the outer threaded barrel 1, the inner threaded barrel 7 is threadedly connected with a threaded column 8 matched with the driving rod, which is convenient for the installation of the grouting nozzle 10 and the pushing of the driving rod into the threaded inner barrel 2, the driving rod has good storage performance, the driving rod includes a round rod 13 and two sliding rods 14, the round rod 13 is slidably matched in the intermediate mounting ring 12, two guide grooves are symmetrically arranged in the intermediate mounting ring 12, the two sliding rods 14 are respectively slidably matched in the two guide grooves, and the two sliding rods 14 are fixedly connected with the round rod 13, so that the relative position between the threaded inner barrel 2 and the outer threaded barrel 1 can be adjusted according to the depth of the anchor rod slot hole, thereby facilitating the adjustment of the overall length of the anchor rod for tunnel exploration support, the depth requirement of the anchor rod slot hole is not high, and the grouting hole 5 is convenient to explore out, the left and right ends of the round rod 13 are respectively fixedly connected with a driving column 15 and a limiting column 16, the right end of the tension spring 6 is fixedly connected with the limiting column 16, which can limit the limit position of the left movement of the round rod 13, avoiding the disengagement of the round rod 13 from the intermediate mounting ring 12, the left end of the driving column 15 is in contact with the threaded column 8, a plurality of driving holes 17 are equally angularly arranged on the side wall of the driving column 15, which is convenient for the driving of the driving column 15, the left end of the driving column 15 is provided with a transition chamfer, a plurality of grouting grooves 18 are arranged on the transition chamfer, which is convenient for the passing of the mortar in the grouting process, the threaded column 8 is fixedly connected with an outer hexagonal driving block 9, a threaded inner hole is arranged on the outer hexagonal driving block 9 and the threaded column 8, and a grouting nozzle 10 is threadedly connected in the threaded inner hole.

[0033] A kind of anchor rod for tunnel exploration support and its construction method, including the following steps:

[0034] S1, the construction method of the anchor rod for tunnel exploration support is, first, drill anchor rod slot hole on the inner wall of exploration tunnel, then the anchor rod for tunnel exploration support is rotated and inserted into anchor rod slot hole, so that rubber sealing plug 19 is in contact with the slot hole of anchor rod slot hole until sealing gasket 20 is in contact with exploration tunnel, the contact sealing of outer threaded barrel 1 and anchor rod slot hole is realized by the deformation of rubber sealing plug 19, the installation of outer threaded barrel 1 is completed;

[0035] S2, after the installation of the anchor rod for tunnel exploration support is completed, the threaded column 8 is removed from the inner threaded cylinder 7, the tightening effect of the threaded column 8 on the driving column 15 is invalid, under the action of the tension spring 6, the round rod 13 slides to the left relative to the middle mounting ring 12, the left sliding of the round rod 13 pops out the driving column 15 from the inner threaded cylinder 7, the auxiliary rod outside is inserted into the driving hole 17, the rotation of the driving column 15 is realized through the lever principle, the rotation of the driving column 15 drives the rotation of the round rod 13, the rotation of the round rod 13 drives the rotation of the middle mounting ring 12 through the slide 14, the rotation of the middle mounting ring 12 drives the rotation of the threaded inner cylinder 2 through the bridge rod 11, the threaded inner cylinder 2 extends relative to the outer threaded cylinder 1, after the threaded inner cylinder 2 extends relative to the outer threaded cylinder 1, the outlet hole 5 is exposed and the end block 3 is pushed to the right, after the adjustment of the threaded inner cylinder 2 relative to the outer threaded cylinder 1 is completed, the threaded column 8 is screwed into the inner threaded cylinder 7 again;

[0036] S3, after the position adjustment of the threaded inner cylinder 2 in the outer threaded cylinder 1 is completed and the threaded column 8 is reset in the inner threaded cylinder 7, grouting is carried out through the grouting nozzle 10, during the grouting process, the mortar is introduced into the threaded inner cylinder 2 from the grouting groove 18, and flows out of the threaded inner cylinder 2 through the outlet hole 5 on the threaded inner cylinder 2, realizing the grouting of the exploration tunnel, after the grouting is completed, pressure maintenance is carried out, and after the pressure is reduced, grouting and pressure maintenance are carried out again until the pressure no longer decreases;

[0037] S4, after the grouting and pressure maintenance are completed, the installation of the anchor rod for tunnel exploration support is completed, and then the installation of other anchor rods for tunnel exploration support is completed.

[0038] In summary, the construction method of the exploration tunnel support anchor rod is that first, the anchor rod slot hole is drilled on the inner wall of the exploration tunnel, then the outer threaded cylinder 1 is rotated and inserted into the anchor rod slot hole, the rubber sealing plug 19 is in contact with the slot hole of the anchor rod slot hole until the sealing gasket plate 20 is in contact with the exploration tunnel, the contact sealing of the outer threaded cylinder 1 and the anchor rod slot hole is realized through the deformation of the rubber sealing plug 19, the installation of the outer threaded cylinder 1 is completed, after the installation of the outer threaded cylinder 1 is completed, the threaded column 8 is disassembled from the inner threaded cylinder 7, the tightening effect of the threaded column 8 on the driving column 15 is invalid, under the action of the tension spring 6, the round rod 13 slides to the left relative to the middle mounting ring 12, the round rod 13 slides to the left to pop out the driving column 15 from the inner threaded cylinder 7, the auxiliary rod outside is inserted into the driving hole 17, the rotation of the driving column 15 is realized through the lever principle, the round rod 13 is rotated by the driving column 15, the middle mounting ring 12 is rotated by the round rod 13 through the slide 14, the threaded inner cylinder 2 is rotated by the middle mounting ring 12 through the bridge rod 11, the threaded inner cylinder 2 is extended relative to the outer threaded cylinder 1, the threaded inner cylinder 2 is extended relative to the outer threaded cylinder 1 to expose the grouting hole 5 and push the end block 3 to the right, after the adjustment of the threaded inner cylinder 2 relative to the outer threaded cylinder 1 is completed, the threaded column 8 is rotated and inserted into the inner threaded cylinder 7 again, after the position adjustment of the threaded inner cylinder 2 in the outer threaded cylinder 1 is completed and the threaded column 8 is installed in the inner threaded cylinder 7, grouting is carried out through the grouting nozzle 10, during the grouting process, the mortar is introduced into the threaded inner cylinder 2 from the grouting slot 18, and flows out of the threaded inner cylinder 2 through the grouting hole 5 on the threaded inner cylinder 2, the grouting of the exploration tunnel is realized, after the grouting is completed, the pressure is maintained, after the pressure is reduced, the grouting and pressure maintaining are carried out again, until the pressure is no longer reduced, after the grouting and pressure maintaining are completed, the installation of the exploration tunnel support anchor rod is completed, then the installation of other exploration tunnel support anchor rods is continued.

Claims

1. A tunnel exploration support anchor rod comprising an externally threaded barrel (1), characterized in that, Also include the threaded inner cylinder (2), the threaded inner cylinder (2) is connected in the outer threaded cylinder (1), the right end of the threaded inner cylinder (2) is fixedly connected with end block (3), the end block (3) is located in the right end of the outer threaded cylinder (1), the right end of the end block (3) is fixedly connected with a plurality of knife plate (4), a plurality of slurry outlet holes (5) are formed in the threaded inner cylinder (2), the left end of the threaded inner cylinder (2) is provided with two symmetrical side slots, the bridge is arranged in the side slot, the driving rod is slidably connected in the bridge, the driving rod and the bridge are connected with the tension spring (6), the left end of the outer threaded cylinder (1) is fixedly connected with the inner threaded cylinder (7), the outer diameter of the inner threaded cylinder (7) is smaller than the outer diameter of the outer threaded cylinder (1), the inner threaded cylinder (7) is threadedly connected with the threaded column (8) matched with the driving rod, the outer hexagonal driving block (9) is fixedly connected on the threaded column (8), the threaded inner hole is formed in the outer hexagonal driving block (9) and the threaded column (8), the threaded inner hole is threadedly connected with the grouting nozzle (10); The bridge includes two bridge rods (11) and an intermediate mounting ring (12), the two bridge rods (11) are respectively matched in the two side slots, and the intermediate mounting ring (12) is fixedly connected between the two bridge rods (11); the left end of the tension spring (6) is fixedly connected with the intermediate mounting ring (12); The driving rod includes a round rod (13) and two sliding strips (14), the round rod (13) is slidably matched in the intermediate mounting ring (12), two guide grooves are symmetrically formed in the intermediate mounting ring (12), the two sliding strips (14) are respectively slidably matched in the two guide grooves, the two sliding strips (14) are fixedly connected with the round rod (13), the left and right ends of the round rod (13) are respectively fixedly connected with the driving column (15) and the limiting column (16), the right end of the tension spring (6) is fixedly connected with the limiting column (16), and the left end of the driving column (15) is in contact with the threaded column (8).

2. A tunneling support anchor rod according to claim 1, characterized in that, A plurality of driving holes (17) are equally formed in the side wall of the driving column (15), the left end of the driving column (15) is provided with a transition chamfer, and a plurality of grouting grooves (18) are arranged on the transition chamfer.

3. A tunneling support anchor rod according to claim 2, characterized in that The outer diameter of the end block (3) is the same as the outer diameter of the outer threaded cylinder (1).

4. A tunneling support anchor rod according to claim 3, characterized in that The outer threaded cylinder (1) is provided with a rubber sealing plug (19) and a sealing pad plate (20), the outer threaded cylinder (1) is threadedly connected with an auxiliary adjusting nut (21), the sealing pad plate (20) is in contact with the auxiliary adjusting nut (21), and the rubber sealing plug (19) is in contact with the sealing pad plate (20).

5. A method of constructing a tunnel support anchor, characterized by, The tunnel exploration support anchor rod according to claim 4 is used, and the following steps are included: S1, drilling anchor rod slot holes on the inner wall of the exploration tunnel, then rotating and inserting the tunnel exploration support anchor rod into the anchor rod slot holes, so that the rubber sealing plug (19) is in contact with the slot hole of the anchor rod slot hole until the sealing pad plate (20) is in contact with the exploration tunnel, the deformation of the rubber sealing plug (19) realizes the contact sealing of the outer threaded cylinder (1) and the anchor rod slot hole, and the installation of the outer threaded cylinder (1) is completed; S2, after the installation of the tunnel exploration support anchor rod is completed, the threaded column (8) is disassembled from the inner threaded cylinder (7), the tightening effect of the threaded column (8) on the driving column (15) is invalid, under the action of the tension spring (6), the round rod (13) slides to the left relative to the middle mounting ring (12), the round rod (13) slides to the left to pop the driving column (15) out of the inner threaded cylinder (7), the external auxiliary rod is inserted into the driving hole (17), the rotation of the driving column (15) is realized through the lever principle, the driving column (15) rotates to drive the round rod (13) to rotate, the round rod (13) rotates to drive the middle mounting ring (12) to rotate through the slide bar (14), the middle mounting ring (12) rotates to drive the threaded inner cylinder (2) to rotate through the bridge rod (11), the threaded inner cylinder (2) rotates to extend relative to the outer threaded cylinder (1), after the threaded inner cylinder (2) extends relative to the outer threaded cylinder (1), the grouting hole (5) is exposed and the end block (3) is pushed to the right, after the adjustment of the threaded inner cylinder (2) relative to the outer threaded cylinder (1) is completed, the threaded column (8) is reinserted into the inner threaded cylinder (7); S3, after the position adjustment of the threaded inner cylinder (2) in the outer threaded cylinder (1) is completed and the threaded column (8) is reset in the inner threaded cylinder (7), grouting is carried out through the grouting nozzle (10), during the grouting process, the mortar is introduced into the threaded inner cylinder (2) from the grouting groove (18), and flows out of the threaded inner cylinder (2) through the grouting hole (5) on the threaded inner cylinder (2), realizing the grouting of the exploration tunnel, after the grouting is completed, the pressure is maintained, and after the pressure is reduced, the grouting and pressure maintenance are carried out again until the pressure no longer decreases; S4, after the grouting and pressure maintenance are completed, the installation of the exploration tunnel support anchor rod is completed, and then the installation of other exploration tunnel support anchor rods is continued.

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