Testing equipment and testing method for anchoring force of pipe seam type anchor rod

Abstract

The invention discloses equipment for testing anchoring force of a pipe seam type anchor rod. The equipment comprises a bottomless box, a plurality of convex strips which are arranged at equal intervals are fixedly connected to the inner side wall of the bottomless box, a plurality of annular grooves are formed in the side wall of the rock block, the annular grooves are matched with the convex strips, a plurality of downward pressing screw rods are jointly inserted into the upper top plate and the top wall of the bottomless box in a penetrating and threaded mode, and the bottom ends of the downward pressing screw rods abut against the bottom of the rock block; the top and the bottom of the pipe seam anchor rod are fixedly connected with an upper anchor lantern ring and a lower anchor lantern ring which are coaxially arranged correspondingly, and when the top of the upper anchor lantern ring is flush with the top of the rock block, the lower half portion of the lower anchor lantern ring extends out of the bottom of the rock block. The outer diameter of the upper anchor lantern ring and the outer diameter of the lower anchor lantern ring are smaller than that of the pipe seam anchor rod, a plurality of tie bars are fixedly connected to the inner wall of the upper anchor lantern ring and the inner wall of the lower anchor lantern ring, and an ejection mechanism axially ejecting the bottom of the lower anchor lantern ring is installed at the top of the lower bottom plate. According to the invention, the stress condition of the pipe seam type anchor rod in reality can be simulated in a laboratory, and the anchoring force of the pipe seam type anchor rod can be measured more accurately.

Description

Technical Field

[0001] The invention belongs to the technical field of testing equipment, and in particular relates to testing equipment and a testing method for the anchoring force of a pipe seam type anchor rod. Background Art

[0002] The main body of the mine tunnel surrounding rock support structure is the pipe-slit anchor rod; ensuring the stability of the mine tunnel surrounding rock support structure is the top priority of the construction operation. Therefore, it is necessary to conduct corresponding tests on the pipe-slit anchor rod, propose corresponding testing equipment and testing methods to complete the testing system of the pipe-slit anchor rod, and then provide theoretical support for the evaluation of the strength and applicability of the mine tunnel surrounding rock support structure.

[0003] The pipe-slit anchor is a new type of anchor that is fully anchored and actively reinforces the surrounding rock. Its three-dimensional part is a high-strength steel pipe with a longitudinal slit. When this anchor is installed in a borehole slightly smaller than the pipe diameter, the slit pipe is compressed, thereby generating radial elastic force. The friction between this elastic force and the anchored rock mass is the anchoring force.

[0004] The anchoring force test of the pipe-slit anchor is an important part of the pipe-slit anchor test system. However, due to the deep burial position of the surrounding rock of the mine tunnel, the anchoring force test of the pipe-slit anchor is difficult to complete on-site, and there are problems in laboratory testing such as "it is difficult to simulate the surrounding rock environment of the mine tunnel" and "it is difficult to apply external force to the pipe-slit anchor to remove it coaxially". As a result, the data accuracy of the laboratory test of the anchoring force of the pipe-slit anchor is poor. In order to solve the above problems, the present invention proposes a laboratory pipe-slit anchor anchoring force test device and test method. Summary of the invention

[0005] The present invention aims at solving the problems in the prior art and proposes the following technical solutions:

[0006] The pipe seam anchor bolt anchoring force testing equipment comprises an upper top plate and a lower bottom plate arranged in parallel, the upper top plate and the lower bottom plate are supported and fixed by a plurality of support rods, the testing equipment also comprises a pipe seam anchor bolt and a rock block, a drill hole matching the pipe seam anchor bolt is provided in the middle of the rock block, and a bottomless box matching the rock block is fixedly connected to the bottom of the upper top plate;

[0007] A plurality of equidistantly arranged convex strips are fixedly connected to the inner side wall of the bottomless box, a plurality of annular grooves are processed on the side wall of the rock block, and the annular grooves and the convex strips are adapted to each other, a plurality of pressing screws are commonly threadedly inserted on the upper top plate and the top wall of the bottomless box, and the bottom ends of the pressing screws are against the bottom of the rock block;

[0008] The top and bottom of the pipe seam anchor are respectively fixedly connected with a coaxially arranged upper anchor collar and a lower anchor collar, and when the top of the upper anchor collar is flush with the top of the rock block, the lower half of the lower anchor collar extends out of the bottom of the rock block; the outer diameters of the upper anchor collar and the lower anchor collar are smaller than the outer diameter of the pipe seam anchor, a plurality of tensioning bars are fixedly connected to the inner walls of the upper anchor collar and the lower anchor collar, and an ejection mechanism for axially lifting the bottom of the lower anchor collar is installed on the top of the lower base plate.

[0009] As a preferred embodiment of the above technical solution, the side wall of the bottomless box is provided with a detachable box side panel, the joint between the bottomless box and the box side panel is provided with threaded strips and nuts, the box side panel is provided with docking holes, and the docking holes and threaded strips match each other.

[0010] As a preferred embodiment of the above technical solution, the upper top plate and the top wall of the bottomless box are jointly provided with a top slot hole, which extends from the center of the upper top plate to the edge, and the width of the top slot hole is greater than the drill hole in the middle of the rock block.

[0011] As a preferred embodiment of the above technical solution, the annular edges of the upper anchor collar and the lower anchor collar are both axially provided with gaps, and the gaps coincide with the gaps on the pipe seam anchor rods.

[0012] As a preferred embodiment of the above technical solution, the ejection mechanism includes a connecting plate and a connecting plate arranged in parallel, a high-strength spring is installed between the connecting plate and the connecting plate, a pressure sensor is installed on the top of the connecting plate, and a top block flush with the bottom of the lower anchor ring and the connecting plate is installed on the top of the pressure sensor, and a lifting assembly is provided at the bottom of the connecting plate.

[0013] As a preferred embodiment of the above technical solution, the lifting assembly includes a motor fixedly mounted on the top of the lower base plate, the output shaft of the motor is fixedly connected to a threaded rod, the outer threaded sleeve of the threaded rod is provided with a threaded sleeve, and the top of the threaded sleeve and the bottom of the connecting plate are fixed.

[0014] As a preferred embodiment of the above technical solution, a guide assembly is provided on the top of the lower base plate, and the guide assembly includes a guide sleeve and a guide rod. The guide sleeve is fixedly installed on the top of the lower base plate, and the top of the guide rod movably passes through the connecting plate and is fixed to the connecting plate.

[0015] A testing method is applied to the above-mentioned pipe seam anchor bolt anchoring force testing device, and the testing method comprises the following steps:

[0016] S1. Installation of pipe seam anchor rod: drill the pipe seam anchor rod, upper anchor collar and lower anchor collar from bottom to top from the top of the rock block until the top of the upper anchor collar is flush with the top of the rock block, and the lower half of the tie rod extends out of the bottom of the rock block;

[0017] S2. Installation of rock block: install the rock block with the pipe seam anchor rod installed as a whole into the inner cavity of the bottomless box, engage the convex strips and the annular grooves with each other, and rotate the pressing screw rod so that the bottom end of the pressing screw rod abuts against the top of the rock block;

[0018] S3. Anchoring force test: The ejection mechanism axially lifts the bottom of the lower anchor collar, thereby driving the pipe seam anchor rod, the upper anchor collar and the lower anchor collar to move axially upward as a whole. The force applied by the ejection mechanism at the beginning of the axial upward movement of the pipe seam anchor rod is the anchoring force of the pipe seam anchor rod on the rock block.

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

[0020] 1. A plurality of equidistantly arranged convex strips are fixedly connected to the inner side wall of the bottomless box, and a plurality of annular grooves are processed on the side wall of the rock block, and the annular grooves and the convex strips are adapted to each other. When the rock block is loaded into the inner cavity of the bottomless box, the plurality of convex strips on the four sides of the bottomless box are interlaced and engaged with the annular grooves in a surrounding manner, so that a surrounding uniform vertical resistance can be generated to the rock block in the subsequent test of the anchoring force, thereby simulating the vertical resistance of the rock block around it when it is deeply buried; at the same time, a plurality of pressing screws are threadedly inserted into the upper top plate and the top wall of the bottomless box, and the bottom end of the pressing screw is pressed against the bottom of the rock block; thereby simulating the downward pressure on the top of the rock block when it is deeply buried; through the design of the annular grooves, convex strips, pressing screws and other structures, the stress state of the rock block when it is deeply buried can be simulated, thereby more accurately simulating and measuring the anchoring force of the pipe seam anchor in the real environment in the laboratory;

[0021] 2. The top and bottom of the pipe seam anchor are respectively fixedly connected with a coaxially arranged upper anchor ring and a lower anchor ring. The annular edges of the upper anchor ring and the lower anchor ring are axially provided with gaps, and the gaps coincide with the gaps on the pipe seam anchor. In this way, when the pipe seam anchor is installed in the borehole in the middle of the rock block and undergoes radial deformation, after the axis changes, the upper anchor ring and the lower anchor ring will also synchronously produce corresponding radial deformation, so that the upper anchor ring and the lower anchor ring always maintain a high degree of coaxiality with the pipe seam anchor. In this way, when the ejection mechanism axially lifts the bottom of the lower anchor ring, the lower anchor ring can coaxially lift the pipe seam anchor upward, thereby making the measured anchoring force of the pipe seam anchor more accurate.

[0022] 3. When the top of the upper anchor collar is flush with the top of the rock block, the lower half of the lower anchor collar extends out of the bottom of the rock block; the arrangement of the upper anchor collar and the lower anchor collar can not only maintain a high degree of coaxiality with the pipe seam anchor rod, but also facilitate the upper anchor collar to be completely buried in the borehole in the middle of the rock block when installed. When the ejection mechanism lifts the pipe seam anchor rod upward at the starting section (i.e., the height of the upper anchor collar), the pipe seam anchor rod always remains completely buried in the borehole in the middle of the rock block. This can well simulate the embedding situation of the pipe seam anchor rod in reality, and the measured anchoring force of the pipe seam anchor rod is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure shows a top view of a stereoscopic structure of a pipe seam type anchor bolt anchoring force testing device in an embodiment;

[0024] Figure 2 The figure shows a bottom-up stereoscopic structural diagram of a pipe seam type anchor bolt anchoring force testing device in an embodiment;

[0025] Figure 3 The figure shows the internal structure of the pipe-seam anchor bolt anchoring force testing device in the embodiment after the rock block is installed with the pipe-seam anchor bolt;

[0026] Figure 4 The diagram shows a schematic diagram of the structure of a pipe seam anchor in a pipe seam anchor anchor force testing device in an embodiment;

[0027] Figure 5 The diagram shows a schematic diagram of a bottomless box structure in a pipe seam type anchor bolt anchoring force testing device in an embodiment;

[0028] Figure 6 What is shown is a schematic diagram of the structure of the ejection mechanism in the pipe seam type anchor bolt anchoring force testing equipment in the embodiment.

[0029] In the figure: 10, lower bottom plate; 11, upper top plate; 111, top slot hole; 12, support rod; 20, ejection mechanism; 21, motor; 22, threaded rod; 23, threaded sleeve; 24, connecting plate; 25, connecting plate; 26, high-strength spring; 27, pressure sensor; 28, top block; 29, guide assembly; 30, bottomless box; 31, box side plate; 32, convex strip; 33, threaded strip; 34, nut; 40, downward pressure screw; 41, push sleeve; 50, rock block; 51, ring groove; 60, pipe seam anchor rod; 61, upper anchor ring; 62, lower anchor ring; 63, tension rod. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0031] Example

[0032] like Figure 1 , Figure 2 As shown, the pipe seam anchor bolt anchoring force testing equipment comprises an upper top plate 11 and a lower bottom plate 10 which are arranged in parallel, the upper top plate 11 and the lower bottom plate 10 are supported and fixed by a plurality of support rods 12, the testing equipment also comprises a pipe seam anchor bolt 60 and a rock block 50, a drill hole which is adapted to the pipe seam anchor bolt 60 is provided in the middle of the rock block 50, and a bottomless box 30 which is adapted to the rock block 50 is fixedly connected to the bottom of the upper top plate 11;

[0033] A plurality of equidistantly arranged convex strips 32 are fixedly connected to the inner side wall of the bottomless box 30, and a plurality of annular grooves 51 are processed on the side wall of the rock block 50, and the annular grooves 51 and the convex strips 32 are adapted to each other. When the rock block 50 is loaded into the inner cavity of the bottomless box 30, the plurality of convex strips 32 on the four sides of the bottomless box 30 are staggered and engaged with the annular grooves 51 in a surrounding manner, and a surrounding uniform vertical resistance can be generated to the rock block 50 in the subsequent test of the anchoring force, thereby simulating the vertical resistance around the rock block 50 when it is buried deep. A plurality of pressing screws 40 are threadedly inserted into the upper top plate 11 and the top wall of the bottomless box 30, and the bottom ends of the pressing screws 40 are against the bottom of the rock block 50; thereby, the downward pressure on the top of the rock block 50 when it is deeply buried can be simulated; through the design of the annular groove 51, the convex strip 32, the pressing screws 40 and other structures, the stress state of the rock block 50 when it is deeply buried can be simulated, and then the anchoring force of the pipe seam anchor 60 in the real environment can be more accurately simulated and measured in the laboratory.

[0034] like Figure 3 , Figure 4 As shown, the top and bottom of the pipe seam anchor 60 are respectively fixedly connected with a coaxially arranged upper anchor ring 61 and a lower anchor ring 62, and the annular edges of the upper anchor ring 61 and the lower anchor ring 62 are axially provided with gaps, and the gaps coincide with the gaps on the pipe seam anchor 60. In this way, when the pipe seam anchor 60 is installed in the borehole in the middle of the rock block 50 and radial deformation occurs, after the axis changes, the upper anchor ring 61 and the lower anchor ring 62 will also synchronously produce corresponding radial deformation, so that the upper anchor ring 61 and the lower anchor ring 62 always maintain a high degree of coaxiality with the pipe seam anchor 60. In this way, when the ejection mechanism 20 axially lifts the bottom of the lower anchor ring 62, the lower anchor ring 62 can coaxially lift the pipe seam anchor 60 upward, thereby making the measured anchoring force of the pipe seam anchor 60 more accurate.

[0035] When the top of the upper anchor ring 61 is flush with the top of the rock block 50, the lower half of the lower anchor ring 62 extends out of the bottom of the rock block 50; the arrangement of the upper anchor ring 61 and the lower anchor ring 62 can not only maintain a high degree of coaxiality with the pipe seam anchor rod 60, but also facilitate the upper anchor ring 61 to be completely buried in the drilled hole in the middle of the rock block 50 when installed. When the ejection mechanism 20 pushes the pipe seam anchor rod 60 upward at the starting section (i.e., the height of the upper anchor ring 61), the pipe seam anchor rod 60 always remains completely buried in the drilled hole in the middle of the rock block 50, which can well simulate the embedding situation of the pipe seam anchor rod 60 in reality, and the measured anchoring force of the pipe seam anchor rod 60 is more accurate.

[0036] The outer diameters of the upper anchor ring 61 and the lower anchor ring 62 are smaller than the outer diameter of the pipe joint anchor rod 60, thereby preventing the outer walls of the upper anchor ring 61 and the lower anchor ring 62 from contacting the drilled hole in the middle of the rock block 50, thereby affecting the test result of the anchoring force of the pipe joint anchor rod 60.

[0037] The inner walls of the upper anchor collar 61 and the lower anchor collar 62 are fixedly connected with a plurality of tie rods 63. The tie rods 63 can be provided to strengthen the axial integrity of the upper anchor collar 61 and the lower anchor collar 62, that is, when the pipe seam anchor rod 60 undergoes radial deformation, the connection between the upper anchor collar 61, the lower anchor collar 62 and the pipe seam anchor rod 60 will undergo the same radial response. The tie rods 63 strengthen the axial integrity of the upper anchor collar 61 and the lower anchor collar 62, so that the upper anchor collar 61 and the lower anchor collar 62 as a whole will undergo the same radial deformation as the connection, thereby ensuring the consistency of the radial deformation of the upper anchor collar 61 and the lower anchor collar 62 away from the pipe seam anchor rod 60 and the pipe seam anchor rod 60.

[0038] The side wall of the bottomless box 30 is provided with a detachable box side panel 31, and the joint between the bottomless box 30 and the box side panel 31 is provided with a threaded strip 33 and a nut 34, and the box side panel 31 is provided with a docking hole, and the docking hole matches the threaded strip 33. The detachable box side panel 31 facilitates the installation and removal of the rock block 50.

[0039] The upper top plate 11 and the top wall of the bottomless box 30 are provided with a top slot hole 111, which extends from the center of the upper top plate 11 to the edge, and the width of the top slot hole 111 is greater than the drilled hole in the middle of the rock block 50. When the ejection mechanism 20 pushes up the lower anchor ring 62, it drives the pipe seam anchor rod 60, the upper anchor ring 61, and the lower anchor ring 62 to move upward as a whole. At this time, the upper anchor ring 61 pushes out the top of the rock block 50. The top slot hole 111 is provided to accommodate the ejected upper anchor ring 61, so that the rock block 50 can be easily disassembled at this time.

[0040] like Figure 6 As shown, the ejection mechanism 20 includes a connecting plate 24 and a connecting plate 25 which are arranged in parallel, a high-strength spring 26 is installed between the connecting plate 24 and the connecting plate 25, a pressure sensor 27 is installed on the top of the connecting plate 25, a top block 28 which is flush with the bottom of the lower anchor ring 62 and the connecting plate 25 is installed on the top of the pressure sensor 27, and a lifting assembly is arranged at the bottom of the connecting plate 24.

[0041] The lifting assembly includes a motor 21 fixedly mounted on the top of the lower base plate 10, the output shaft of the motor 21 is fixedly connected to a threaded rod 22, the outer threaded sleeve of the threaded rod 22 is provided with a threaded sleeve 23, and the top of the threaded sleeve 23 is fixed to the bottom of the connecting plate 24.

[0042] The working principle of the ejection mechanism 20 is as follows: the ejection block 28 abuts against the bottom of the lower anchor ring 62, the motor 21 works to drive the threaded rod 22 to rotate, and the threaded connection drives the threaded sleeve 23 and the connecting plate 24 to move upward, squeezing the high-strength spring 26 to accumulate elastic potential energy. When the squeezed elastic potential energy is equal to the anchoring force of the pipe seam anchor 60, the pipe seam anchor 60, the upper anchor ring 61, and the lower anchor ring 62 are driven to move upward as a whole. At this time, the pressure displayed by the pressure sensor 27 is the anchoring force of the pipe seam anchor 60.

[0043] A guide assembly 29 is provided on the top of the lower base plate 10 . The guide assembly 29 includes a guide sleeve and a guide rod. The guide sleeve is fixedly mounted on the top of the lower base plate 10 . The top of the guide rod movably passes through the connecting plate 24 and is fixed to the connecting plate 25 .

[0044] A testing method is applied to the above-mentioned pipe seam anchor bolt anchoring force testing device, and the testing method comprises the following steps:

[0045] S1. Installation of the pipe seam anchor 60: The pipe seam anchor 60, the upper anchor ring 61, and the lower anchor ring 62 are drilled into the top of the rock block 50 from bottom to top until the top of the upper anchor ring 61 is flush with the top of the rock block 50, and the lower half of the tie rod 63 extends out of the bottom of the rock block 50;

[0046] S2. Installation of the rock block 50: The rock block 50 with the pipe seam anchor 60 installed is installed as a whole into the inner cavity of the bottomless box 30, the convex strip 32 and the annular groove 51 are engaged with each other, and the pressing screw 40 is rotated so that the bottom end of the pressing screw 40 abuts against the top of the rock block 50;

[0047] S3. Anchoring force test: The ejection mechanism 20 axially lifts the bottom of the lower anchor ring 62, thereby driving the pipe seam anchor 60, the upper anchor ring 61, and the lower anchor ring 62 to move axially upward as a whole. The force applied by the ejection mechanism 20 at the beginning of the axial upward movement of the pipe seam anchor 60 is measured as the anchoring force of the pipe seam anchor 60 on the rock block 50.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A pipe-seam anchor bolt anchoring force testing device, comprising an upper top plate (11) and a lower bottom plate (10) arranged in parallel, wherein the upper top plate (11) and the lower bottom plate (10) are supported and fixed by a plurality of support rods (12), the testing device also comprising a pipe-seam anchor bolt (60) and a rock block (50), wherein a borehole matching the pipe-seam anchor bolt (60) is provided in the middle of the rock block (50), and the device is characterized in that: A bottomless box (30) adapted to the rock block (50) is fixedly connected to the bottom of the upper top plate (11); A plurality of equidistantly arranged convex strips (32) are fixedly connected to the inner side wall of the bottomless box (30), a plurality of annular grooves (51) are processed on the side wall of the rock block (50), and the annular grooves (51) and the convex strips (32) are adapted to each other, a plurality of pressing screws (40) are threadedly inserted through the upper top plate (11) and the top wall of the bottomless box (30), and the bottom ends of the pressing screws (40) are against the bottom of the rock block (50); The top and bottom of the pipe seam anchor rod (60) are respectively fixedly connected with an upper anchor ring (61) and a lower anchor ring (62) which are coaxially arranged, and when the top of the upper anchor ring (61) is flush with the top of the rock block (50), the lower half of the lower anchor ring (62) extends out of the bottom of the rock block (50); the outer diameters of the upper anchor ring (61) and the lower anchor ring (62) are smaller than the outer diameter of the pipe seam anchor rod (60); the inner walls of the upper anchor ring (61) and the lower anchor ring (62) are fixedly connected with a plurality of tension bars (63); and the top of the lower base plate (10) is provided with an ejection mechanism (20) for axially lifting the bottom of the lower anchor ring (62).

2. The pipe seam anchor bolt anchoring force testing equipment according to claim 1 is characterized in that: The side wall of the bottomless box (30) is provided with a detachable box side panel (31), and the joint between the bottomless box (30) and the box side panel (31) is provided with a threaded strip (33) and a nut (34), and a docking hole is opened on the box side panel (31), and the docking hole and the threaded strip (33) match each other.

3. The pipe seam anchor bolt anchoring force testing equipment according to claim 1 is characterized in that: The upper top plate (11) and the top wall of the bottomless box (30) are both provided with a top slot hole (111), the top slot hole (111) extends from the center of the upper top plate (11) to the edge, and the width of the top slot hole (111) is greater than the drill hole in the middle of the rock block (50).

4. The pipe seam anchor bolt anchoring force testing equipment according to claim 1 is characterized in that: The annular edges of the upper anchor ring (61) and the lower anchor ring (62) are both axially provided with gaps, and the gaps overlap with the gaps on the pipe seam anchor rod (60).

5. The pipe seam anchor bolt anchoring force testing equipment according to claim 1 is characterized in that: The ejection mechanism (20) comprises a connecting plate (24) and a connecting plate (25) arranged in parallel, a high-strength spring (26) is installed between the connecting plate (24) and the connecting plate (25), a pressure sensor (27) is installed on the top of the connecting plate (25), a top block (28) flush with the bottom of the lower anchor ring (62) and the connecting plate (25) is installed on the top of the pressure sensor (27), and a lifting assembly is arranged at the bottom of the connecting plate (24).

6. The pipe seam anchor bolt anchoring force testing device according to claim 5 is characterized in that: The lifting assembly comprises a motor (21) fixedly mounted on the top of the lower base plate (10), the output shaft of the motor (21) is fixedly connected to a threaded rod (22), a threaded sleeve (23) is provided on the outer threaded sleeve of the threaded rod (22), and the top of the threaded sleeve (23) is fixed to the bottom of the connecting plate (24).

7. The pipe seam anchor bolt anchoring force testing device according to claim 6 is characterized in that: A guide assembly (29) is provided on the top of the lower base plate (10), and the guide assembly (29) comprises a guide sleeve and a guide rod. The guide sleeve is fixedly mounted on the top of the lower base plate (10), and the top of the guide rod movably passes through the connecting plate (24) and is fixed to the connecting plate (25).

8. A testing method, the method being applied to the pipe seam anchor force testing device according to any one of claims 1 to 7, the testing method comprising the following steps: S1. Installation of the pipe seam anchor rod (60): The pipe seam anchor rod (60), the upper anchor collar (61), and the lower anchor collar (62) are drilled into the top of the rock block (50) from bottom to top until the top of the upper anchor collar (61) is flush with the top of the rock block (50), and at this time, the lower half of the tie rod (63) extends out of the bottom of the rock block (50); S2, installation of the rock block (50): the rock block (50) with the pipe seam anchor rod (60) installed is installed as a whole into the inner cavity of the bottomless box (30), the convex strip (32) and the annular groove (51) are engaged with each other, and the pressing screw rod (40) is rotated so that the bottom end of the pressing screw rod (40) is against the top of the rock block (50); S3. Anchoring force test: The ejection mechanism (20) axially lifts up the bottom of the lower anchor ring (62), thereby driving the pipe seam anchor rod (60), the upper anchor ring (61) and the lower anchor ring (62) to move axially upward as a whole. The force applied by the ejection mechanism (20) at the beginning of the axial upward movement of the pipe seam anchor rod (60) is measured as the anchoring force of the pipe seam anchor rod (60) on the rock block (50).

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