Auxiliary device for ground stress test by hollow inclusion stress relief method

Abstract

The utility model relates to a crustal stress test auxiliary device adopting a hollow inclusion stress relieving method, and belongs to the technical field of mine roadway crustal stress test. The device comprises a connecting rod, a centralizing pipe, an orientation box and a hollow bag body which are coaxially arranged, the two ends of the centralizing pipe are an end A and an end B respectively, the end A of the centralizing pipe is in threaded connection with the connecting rod, the end B of the centralizing pipe is fixedly connected with the orientation box, and an installation connector is fixedly arranged at the tail end of the orientation box. Two ends of the hollow bag body are respectively an A'end and a B 'end, the A' end of the hollow bag body is clamped at the end of the mounting joint, the B 'end of the hollow bag body is a working end, a camera device is fixedly arranged on the mounting joint, the camera device is externally connected with a display through a signal cable, and the display screen is externally connected with a power supply. The device provided by the utility model can ensure that the hollow inclusion stress meter can smoothly enter the small hole in the process of testing crustal stress, and the stress meter and the small hole are effectively bonded together through the binder, so that the smooth development of a hollow inclusion stress relief method test is ensured.

Description

Technical Field

[0001] The utility model relates to a ground stress test auxiliary device using a hollow inclusion stress relief method, and belongs to the technical field of ground stress test of mine tunnels. Background Art

[0002] As the development of mining resources gradually moves deeper into the earth, the mining of deep resources will face complex mechanical environments such as "high stress, high geothermal temperature, high permeability" and engineering disturbances. During the mining process of mining projects, the initial stress field of the surrounding rock will change, and the ground stress is the essential reason for the deformation and destruction of the surrounding rock of underground projects. Therefore, accurate testing of the ground stress in the mining area is of great significance to the safe construction of underground engineering facilities.

[0003] After the continuous development and improvement of geostress testing technology, the more mature geostress testing methods currently include hydraulic fracturing, acoustic generation measurement and aperture deformation methods. The hollow inclusion stress relief method is a typical measurement method in the aperture deformation method. It relieves part of the geostress by drilling and casing, and then measures the resulting strain change to calculate the stress value. This method has been widely used in the measurement of geostress in mine tunnels.

[0004] The traditional hollow inclusion stress relief test device also has some problems in the actual ground stress measurement process. For example, when the hollow inclusion strain gauge is pushed into the small hole, the specific situation of the hollow inclusion during the advancement process cannot be observed due to the deep drilling hole, so the binder cannot be completely released, resulting in the failure of the bonding function. The small hole and the hollow inclusion strain gauge cannot be completely bonded together, which ultimately leads to the failure of the stress relief work. Utility Model Content

[0005] In view of the problems in the existing hollow inclusion stress relief method for measuring ground stress, due to the deep drilling, it is impossible to observe the specific situation during the advancement of the hollow inclusion, so that the binder cannot be completely released, resulting in failure of the bonding function, and the small hole and the hollow inclusion strain gauge cannot be completely bonded together, which ultimately leads to failure of the stress relief work. The utility model proposes a hollow inclusion stress relief method ground stress test auxiliary device. The device of the utility model captures the image of the hollow inclusion advancing into the small hole in real time by setting a camera device, and can ensure that the hollow inclusion stress gauge can smoothly enter the small hole during the ground stress test, and effectively bond the stress gauge and the small hole together through the adhesive, thereby ensuring the smooth implementation of the hollow inclusion stress relief method test.

[0006] A stress relief method for hollow enclosure ground stress test auxiliary device comprises a coaxially arranged connecting rod 10, a straightening tube 1, an orientation box 3 and a hollow enclosure 8, the two ends of the straightening tube 1 are respectively an A end and a B end, the A end of the straightening tube 1 is threadedly connected to the connecting rod 10, the B end of the straightening tube 1 is fixedly connected to the orientation box 3, the end of the orientation box 3 is fixedly provided with a mounting joint 4, the two ends of the hollow enclosure 8 are respectively an A' end and a B' end, the A' end of the hollow enclosure 8 is clamped on the end of the mounting joint 4, the B' end of the hollow enclosure 8 is a working end, a camera device 5 is fixedly provided on the mounting joint 4, the camera device 5 is externally connected to a display 6 via a signal cable 7, and the display screen 6 is externally connected to a power supply 9.

[0007] The camera device 5 is used to capture the image of the hollow inclusion entering the small hole in real time; the display 6 is used to collect the real-time image captured by the camera device; the signal cable 7 is used to connect the display and the camera device; the power supply 9 is used to provide electrical energy;

[0008] During the test, the rotation angle of the lens of the camera device 5 is pre-adjusted so that it faces the B' end of the hollow package 8. The camera device 5 is used to transmit the images captured during the advancement of the hollow package 8 to the display 6 in real time, so as to facilitate real-time deviation correction during the advancement of the hollow package 8, ensure that the hollow package stress gauge can smoothly enter the small hole and improve the accuracy of the hollow package entering the small hole, thereby improving the success rate of the test and reducing the test cost.

[0009] A plurality of auxiliary wheels 11 are evenly arranged on the connecting rod 10. The auxiliary wheels 11 can rotate close to the side wall of the small hole to assist the stable delivery of the hollow package, so as to avoid the problem that the connecting rod is too long and deformed due to the deep drilling depth, thereby affecting the accuracy of the hollow package test.

[0010] A centralizer 2 is fixedly arranged on the centralizing tube 1 and is close to the orientation box 3 .

[0011] A cavity 12 is provided inside the hollow package 8 along the axis, and a glue outlet hole 13 connected to the cavity 12 is opened at the B' end of the hollow package 8; the cavity 12 is filled with adhesive, and the adhesive can overflow through the glue outlet hole 13, effectively gluing the stress gauge and the small hole together, ensuring the smooth implementation of the hollow package stress relief method test.

[0012] The camera device 5 includes a support 14, a camera 16 and a support panel 17. The top of the support 14 is connected to the support panel 17 through a rotating hinge 15. The camera 16 is fixedly arranged on the support panel 17, and the lens of the camera 16 faces the B' end of the hollow enclosure 8. The camera 16 can adjust the rotation angle of the lens through the rotating hinge 15 to facilitate the lens to face the working end of the hollow enclosure 8, so that the camera 16 can accurately and in real time capture the image of the hollow enclosure advancing into the small hole, ensure that the hollow enclosure stress gauge can smoothly enter the small hole and improve the accuracy of the hollow enclosure entering the small hole.

[0013] The beneficial effects of the utility model are:

[0014] (1) The utility model can capture the image of the hollow inclusion pushing into the small hole in real time by setting a camera device, so as to ensure that the hollow inclusion stress gauge can smoothly enter the small hole during the process of testing the ground stress, and effectively glue the stress gauge and the small hole together through the adhesive, so as to effectively improve the success rate of the ground stress test of the hollow inclusion stress relief method;

[0015] (2) The utility model provides an auxiliary wheel that can rotate close to the side wall of the small hole to assist the stable delivery of the hollow package, thereby improving the accuracy of the hollow package entering the small hole and improving the success rate of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the auxiliary device for in-situ stress testing using the hollow inclusion stress relief method;

[0017] Figure 2 It is a schematic diagram of the hollow inclusion structure;

[0018] Figure 3 It is a schematic diagram of the structure of a camera device;

[0019] In the figure, 1-straightening tube, 2-straightener, 3-orientation box, 4-mounting joint, 5-camera device, 6-display, 7-signal cable, 8-hollow package, 9-power supply, 10-connecting rod, 11-auxiliary wheel, 12-cavity, 13-glue outlet hole, 14-support, 15-rotating hinge, 16-camera, 17-support panel. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below in conjunction with specific implementation methods, but the protection scope of the present invention is not limited to the described contents.

[0021] Example 1: A hollow inclusion stress relief method ground stress test auxiliary device (see Figure 1), comprising a coaxially arranged connecting rod 10, a straightening tube 1, an orientation box 3 and a hollow package 8, the two ends of the straightening tube 1 are respectively an A end and a B end, the A end of the straightening tube 1 is threadedly connected to the connecting rod 10, the B end of the straightening tube 1 is fixedly connected to the orientation box 3, the end of the orientation box 3 is fixedly provided with a mounting joint 4, the two ends of the hollow package 8 are respectively an A' end and a B' end, the A' end of the hollow package 8 is clamped on the end of the mounting joint 4, the B' end of the hollow package 8 is a working end, and a camera device 5 is fixedly provided on the mounting joint 4, the camera device 5 is externally connected to a display 6 through a signal cable 7, and the display screen 6 is externally connected to a power supply 9;

[0022] A centralizer 2 is fixedly arranged on the centralizing tube 1 and the centralizer 2 is close to the orientation box 3;

[0023] The camera device 5 is used to capture the image of the hollow inclusion entering the small hole in real time; the display 6 is used to collect the real-time image captured by the camera device; the signal cable 7 is used to connect the display and the camera device; the power supply 9 is used to provide electrical energy;

[0024] The method for using the hollow inclusion stress relief method ground stress test auxiliary device has the following specific steps:

[0025] 1) During the test, the rotation angle of the camera lens 5 is pre-adjusted so that it faces the B' end of the hollow package 8, and the general direction and angle of the hollow package are controlled and adjusted by the centralizer 2 and the orientation box 3;

[0026] 2) The hollow package 8 is coaxially sent into the small hole, and the image captured during the advancement of the hollow package 8 is transmitted and presented on the display 6 in real time by the camera device 5;

[0027] 3) Through the real-time picture of the working end of the hollow package 8 moving forward displayed on the display 6, it is convenient to perform real-time fine adjustment and correction during the moving process of the hollow package 8, to ensure that the hollow package 8 can smoothly enter the preset position of the small hole, and to improve the accuracy of the hollow package entering the small hole;

[0028] 4) The adhesive in the hollow package flows out and solidifies, so that the hollow package and the small hole are bonded together.

[0029] Example 2: The structure of the auxiliary device for testing ground stress by the stress relief method for hollow inclusions in this example is basically the same as that of the auxiliary device for testing ground stress by the stress relief method for hollow inclusions in Example 1, with the difference being that a plurality of auxiliary wheels 11 are evenly arranged on the connecting rod 10, and the auxiliary wheels 11 can rotate close to the side wall of the small hole to assist the stable delivery of the hollow inclusion, so as to avoid the problem of deformation of the connecting rod due to being too long due to the deep drilling depth, thereby affecting the accuracy of the hollow inclusion test.

[0030] Embodiment 3: The structure of the hollow inclusion stress relief method ground stress test auxiliary device of this embodiment is basically the same as that of the hollow inclusion stress relief method ground stress test auxiliary device of embodiment 2, except that:

[0031] like Figure 2 As shown, a cavity 12 is provided inside the hollow package 8 along the axis, and a glue outlet hole 13 connected to the cavity 12 is opened at the B' end of the hollow package 8; the cavity 12 is filled with adhesive, and the adhesive can overflow through the glue outlet hole 13, effectively gluing the stress gauge and the small hole together, ensuring the smooth implementation of the hollow package stress relief method test.

[0032] Embodiment 4: The structure of the hollow inclusion stress relief method ground stress test auxiliary device of this embodiment is basically the same as that of the hollow inclusion stress relief method ground stress test auxiliary device of embodiment 3, except that:

[0033] like Figure 3 As shown, the camera device 5 includes a support 14, a camera 16 and a support panel 17. The top of the support 14 is connected to the support panel 17 via a rotating hinge 15. The camera 16 is fixedly arranged on the support panel 17, and the lens of the camera 16 faces the B' end of the hollow enclosure 8. The camera 16 can adjust the rotation angle of the lens by rotating the hinge 15, so that the lens faces the working end of the hollow enclosure 8, so that the camera 16 can accurately and in real time capture the image of the hollow enclosure advancing into the small hole, ensure that the hollow enclosure stress gauge can smoothly enter the small hole and improve the accuracy of the hollow enclosure entering the small hole.

[0034] The specific implementation modes of the present invention are described in detail above, but the present invention is not limited to the above implementation modes, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A hollow inclusion stress relief method ground stress test auxiliary device, characterized by: The invention comprises a coaxially arranged connecting rod (10), a straightening tube (1), an orientation box (3) and a hollow enclosure (8), wherein the two ends of the straightening tube (1) are respectively an A end and a B end, the A end of the straightening tube (1) is threadedly connected to the connecting rod (10), the B end of the straightening tube (1) is fixedly connected to the orientation box (3), a mounting joint (4) is fixedly arranged at the end of the orientation box (3), the two ends of the hollow enclosure (8) are respectively an A' end and a B' end, the A' end of the hollow enclosure (8) is clamped on the end of the mounting joint (4), the B' end of the hollow enclosure (8) is a working end, and a camera device (5) is fixedly arranged on the mounting joint (4), the camera device (5) is externally connected to a display (6) via a signal cable (7), and the display (6) is externally connected to a power supply (9).

2. According to claim 1, the hollow inclusion stress relief method ground stress test auxiliary device is characterized by: A plurality of auxiliary wheels (11) are evenly arranged on the connecting rod (10).

3. According to claim 1, the hollow inclusion stress relief method ground stress test auxiliary device is characterized by: A centralizer (2) is fixedly arranged on the centralizer tube (1), and the centralizer (2) is close to the orientation box (3).

4. According to claim 1, the hollow inclusion stress relief method ground stress test auxiliary device is characterized by: A cavity (12) is arranged inside the hollow package (8) along the axis, and a glue outlet hole (13) communicating with the cavity (12) is opened at the B' end of the hollow package (8).

5. According to claim 1, the hollow inclusion stress relief method ground stress test auxiliary device is characterized by: The camera device (5) comprises a support (14), a camera (16) and a support panel (17). The top end of the support (14) is connected to the support panel (17) via a rotating hinge (15). The camera (16) is fixedly arranged on the support panel (17). The lens of the camera (16) faces the B' end of the hollow enclosure (8).

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