Multi-point horizontal and vertical displacement measuring device for coal mine tunnel roof

Abstract

A coal mine tunnel roof multipoint horizontal and vertical displacement measuring device comprises at least two groups of measuring assemblies and positioning assemblies, a front rod of the lower group of measuring assemblies is hinged to a corner detector of a rear rod of the upper group of measuring assemblies, the front rod of each group of measuring assemblies is provided with the positioning assembly, and the positioning assemblies are arranged on the front rod of the lower group of measuring assemblies. The measuring assemblies are fixed in the hole channel through the supporting plates, the hole channel surrounding rock change condition is transmitted to the measuring assemblies in real time, the expansibility of the device is improved through the mutual splicing mode of the measuring assemblies, and meanwhile the measuring devices of the measuring assemblies are matched with one another; through the axial displacement, the axial swing amount and the radial rotation amount, the change condition of the hole surrounding rock is truly reflected, the detection precision is improved, and the on-site safety is improved.

Description

Technical Field

[0001] The invention relates to the field of tunnel construction measurement equipment, in particular to a multi-point horizontal and vertical displacement measurement device for a coal mine tunnel roof. Background Art

[0002] A folding stick type measuring rope, immersed tube positioning system and measuring positioning method provided by publication number CN113607103A include at least two hinged rod segments, and angle detection devices are arranged between adjacent rod segments. The angle detection device is used to detect the relative angle between the corresponding adjacent rod segments. By obtaining the relative position relationship between any two nodes of the folding stick type measuring rope, the purpose of measuring the relative position between two points using the folding stick type measuring rope is achieved.

[0003] Although the above-mentioned prior art realizes the positional relationship between local points in the channel, it is unable to monitor the axial displacement of local rock and soil, which reduces the accuracy of monitoring and poses a safety hazard. Utility Model Content

[0004] The object of the present invention is to provide a method for solving the problems mentioned in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A multi-point horizontal and vertical displacement measuring device for the roof of a coal mine tunnel comprises a measuring assembly and a positioning assembly. There are at least two groups of measuring assemblies. The front rod of the measuring assembly in the lower group is hinged on the angle detector of the rear rod of the measuring assembly in the upper group. A positioning assembly is installed on the front rod of each group of measuring assemblies.

[0007] Preferably, the measuring assembly includes: a front rod, a rear rod, a linear displacement meter, an articulated frame, an angle detector and an inclination detector. The front rod and the rear rod are both straight cylindrical rods, one end of the front rod is connected to the fixed end of the linear displacement meter, and the other end is fixedly connected to the articulated frame, one end of the rear rod is connected to the executing end of the linear displacement meter, and the other end is connected to the fixed end of the angle detector, and an inclination detector is installed in the middle of the rear rod.

[0008] Preferably, in two adjacent groups of measuring components, the detection end of the rotation angle detector of the upper group of measuring components is hinged on the hinge frame of the lower group of measuring components.

[0009] Preferably, the positioning assembly includes a fixing plate, a support plate, a spring, a pull hole, a pull buckle and a pull rope. The fixing plate is arranged on one side of the front rod and is a semi-circular arc plate with the same curvature as the outer side surface of the front rod. The support plate is an arc plate with a curvature greater than that of the fixing plate. The support plate is connected to the outer side surface of the fixing plate at the inner side surface through two springs. A pull hole is provided on each side of the support plate. The axis of the arc surface of the support plate, the axis of the arc surface of the fixing plate and the axis of the front rod are colinear. The axial length of the support plate is greater than that of the fixing plate. The fixing plate, support plate and spring are also arranged in a mirror-image manner on the other side of the front rod.

[0010] Preferably, the two fixing plates form a complete ring fixed on the outer cylindrical surface of the front rod, and two pull holes located on the same side of the front rod are connected by a draw buckle. The draw buckle is a rod with protrusions at both ends and the protrusions at both ends are inserted into the pull holes, and all the draw buckles are connected by draw ropes.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The present invention fixes the measuring component in the hole by a support plate, and transmits the changes of the surrounding rock of the hole to the measuring component in real time. The way in which each group of measuring components is spliced ​​together increases the expandability of the device. At the same time, the measuring devices of each group cooperate with each other to truly reflect the changes of the surrounding rock of the hole through axial displacement, axial swing and radial rotation, thereby improving the detection accuracy and the safety on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0014] Figure 2 A three-dimensional schematic diagram of the measuring assembly of the present invention;

[0015] Figure 3 It is a three-dimensional schematic diagram of the positioning component of the present invention;

[0016] In the figure: 1 measuring assembly, 11 front rod, 12 rear rod, 13 linear displacement meter, 14 articulated frame, 15 rotation angle detector, 16 inclination detector, 2 positioning assembly, 21 fixing plate, 22 support plate, 23 spring, 24 pull hole, 25 pull buckle, 26 pull rope. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Example:

[0019] See also Figures 1 to 3 , the present invention provides a technical solution:

[0020] A multi-point horizontal and vertical displacement measuring device for a coal mine tunnel roof comprises a measuring component 1 and a positioning component 2. The measuring component 1 has at least two groups, such as Figure 1 As shown, the front rod 11 of the measuring component 1 located in the lower group is hinged on the angle detector 15 of the rear rod 12 of the measuring component 1 located in the upper group, and a positioning component 2 is installed on the front rod 11 of each group of measuring components 1. By splicing different numbers of measuring components 1, it is possible to measure the movement of surrounding rocks at different depths.

[0021] As a preferred embodiment, the measuring assembly 1 includes: a front rod 11, a rear rod 12, a linear displacement meter 13, an articulated frame 14, a rotation angle detector 15 and an inclination angle detector 16. The front rod 11 and the rear rod 12 are both straight cylindrical rods. Figure 2 As shown, one end of the front rod 11 is connected to the fixed end of the linear displacement meter 13, and the other end is fixedly connected to the articulated frame 14. The linear displacement meter 13 measures the change in the distance between the front rod 11 and the rear rod 12. One end of the rear rod 12 is connected to the execution end of the linear displacement meter 13, and the other end is connected to the fixed end of the angle detector 15. An inclination detector 16 is installed in the middle of the rear rod 12. The inclination detector 16 can monitor the inclination of the measuring component 1 relative to the horizontal plane.

[0022] As a preferred embodiment, in two adjacent groups of measuring components 1, the detection end of the angle detector 15 of the upper group of measuring components 1 is hinged on the articulated frame 14 of the lower group of measuring components 1. When there is an angle difference between the two groups of measuring components 1, the two groups of measuring components 1 can be bent at the hinge, and the angle detector 15 records the radial rotation amount of the articulated frame 14.

[0023] As a preferred embodiment, the positioning assembly 2 includes a fixing plate 21, a support plate 22, a spring 23, a pull hole 24, a pull buckle 25 and a pull rope 26. The fixing plate 21 is arranged on one side of the front rod 11 and is a semi-circular arc plate with the same curvature as the outer side of the front rod 11. Figure 3As shown, the fixing plate 21 fits tightly against the outer side surface of the front rod 11, the support plate 22 is an arc plate and its curvature is greater than that of the fixing plate 21, and the support plate 22 fits tightly against the inner wall of the hole after entering the hole and opening, providing support for the measuring component 1, and the support plate 22 is connected to the outer side surface of the fixing plate 21 at the inner side surface through two springs 23, and the spring 23 can adapt to the inner diameter of the hole while ensuring the posture of the measuring component 1, and a pulling hole 24 is provided on each side of the support plate 22, and the axis of the arc surface of the support plate 22, the axis of the arc surface of the fixing plate 21 and the axis of the front rod 11 are all colinear, and the axial length of the support plate 22 is greater than that of the fixing plate 21, and the fixing plate 21, the support plate 22 and the spring 23 are also arranged in a mirrored manner on the other side of the front rod 11, and the two sides are arranged in the same manner to provide support for the fixation of the measuring component 1.

[0024] As a preferred embodiment, the two fixing plates 21 form a complete ring and are fixed on the outer cylindrical surface of the front rod 11. After the support plate 22 is close to the inner wall of the channel, the support plate 22 transmits the changes in the surrounding rock around the channel to the measuring component 1 through the fixing plate 21 and the spring 23. The two pull holes 24 located on the same side of the front rod 11 are connected by a buckle 25. The buckle 25 is a rod with protrusions at both ends and the protrusions at both ends are inserted into the pull holes 24. When the device is not in working state, the buckle 25 pulls the two support plates 22 together to facilitate its movement in the channel. After entering the working state, the buckle 25 is pulled away, and the two support plates 22 are stretched outward under the action of the spring 23. All the buckles 25 are connected by a pull rope 26, so that all the buckles 25 can be pulled off after the device enters the channel.

[0025] The working principle of the present invention is as follows: in the preparation stage, each group of measuring components 1 is assembled in a hinged manner, all the buckles 25 are stuck in the pull holes 24, the springs 23 are compressed, and then the assembled device is sent into the hole. After reaching the working area, the pull rope 26 is pulled to tear off all the buckles 25, and the springs 23 are released. The support plates 22 of each group of positioning components 2 press the hole wall, and the two opposite support plates 22 stabilize the posture of the measuring components 1 fixed thereto in the hole and transmit the changes in the surrounding rock of the hole to the measuring components 1. At this time, the device enters the working state. The linear displacement meter 13, the rotation angle detector 15 and the inclination detector 16 are initialized and the data of the starting state are recorded. In the subsequent work, the linear displacement meter 13 monitors the change in the distance between the front rod 11 and the rear rod 12, which represents the axial displacement of the two adjacent measuring components 1. The inclination detector 16 monitors the inclination of the measuring component 1, which represents the axial swing amount of the measuring component 1. The rotation angle detector 15 monitors the radial rotation amount of the two adjacent measuring components 1. By combining the data on all the measuring components 1, the change of the surrounding rock of the tunnel relative to the initial state can be obtained.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-point horizontal and vertical displacement measuring device for a coal mine tunnel roof, comprising a measuring component (1) and a positioning component (2), characterized in that: The measuring components (1) are at least two groups, the front rod (11) of the measuring components (1) in the lower group is hinged to the rotation angle detector (15) of the rear rod (12) of the measuring components (1) in the upper group, and a positioning component (2) is installed on the front rod (11) of each group of measuring components (1); The measuring assembly (1) comprises: a front rod (11), a rear rod (12), a linear displacement meter (13), an articulated frame (14), a rotation angle detector (15) and an inclination detector (16); the front rod (11) and the rear rod (12) are both straight cylindrical rods; one end of the front rod (11) is connected to a fixed end of the linear displacement meter (13) and the other end is fixedly connected to the articulated frame (14); one end of the rear rod (12) is connected to an actuating end of the linear displacement meter (13) and the other end is connected to a fixed end of the rotation angle detector (15); and the inclination detector (16) is installed in the middle of the rear rod (12).

2. The multi-point horizontal and vertical displacement measuring device for coal mine tunnel roof according to claim 1 is characterized in that: In two adjacent groups of measuring components (1), the detection end of the rotation angle detector (15) of the upper group of measuring components (1) is hinged on the hinge frame (14) of the lower group of measuring components (1).

3. A coal mine tunnel roof multi-point horizontal and vertical displacement measuring device according to claim 2, characterized in that: The positioning assembly (2) comprises a fixing plate (21), a support plate (22), a spring (23), a pull hole (24), a pull buckle (25) and a pull rope (26); the fixing plate (21) is arranged on one side of the front rod (11), is a semi-circular arc plate, and has the same arc as the outer side surface of the front rod (11); the support plate (22) is an arc plate, and has a greater arc than the fixing plate (21); the inner side surface of the support plate (22) is connected to the outer side surface of the fixing plate (21) through two springs (23); a pull hole (24) is provided on each side of the support plate (22); the axis of the arc surface of the support plate (22), the axis of the arc surface of the fixing plate (21) and the axis of the front rod (11) are collinear; the axial length of the support plate (22) is greater than that of the fixing plate (21); the fixing plate (21), the support plate (22) and the spring (23) are also provided on the other side of the front rod (11) in a mirror image manner.

4. A coal mine tunnel roof multi-point horizontal and vertical displacement measuring device according to claim 3, characterized in that: The two fixing plates (21) form a complete ring and are fixed on the outer cylindrical surface of the front rod (11). Two adjacent pull holes (24) located on the same side of the front rod (11) are connected by a draw buckle (25). The draw buckle (25) is a rod with protrusions at both ends, and the protrusions at both ends are inserted into the pull holes (24). All the draw buckles (25) are connected by a draw rope (26).

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