Underground reservoir coal pillar dam body monitoring device

Abstract

The utility model discloses an underground reservoir coal pillar dam body monitoring device which comprises a protection steel pipe, the inner side of the protection steel pipe is connected with a monitoring assembly used for monitoring an underground reservoir coal pillar dam body, the monitoring assembly comprises a monitoring installation part connected with the inner side of the protection steel pipe, and the monitoring installation part comprises a plurality of sets of supporting rings. The front side and the rear side of the supporting ring are respectively provided with a connecting column, the inner side of each connecting column is provided with a transmission optical cable, and the edges of the front side and the rear side of the supporting ring are respectively provided with a point type sensor. According to the underground reservoir coal pillar dam body monitoring device, a ring body, a positioning block, a mounting block, a connecting column, a transmission optical cable and a mounting ring are matched with one another, a plurality of point type sensors are guided into a protective steel pipe, guiding and supporting are provided for an optical fiber strain sensor, the transmission optical cable can be conveniently stored in order, and a user can conveniently mount and dismount corresponding monitoring assemblies.

Description

Technical Field

[0001] The utility model relates to the technical field of underground reservoir coal pillar dam body monitoring, in particular to an underground reservoir coal pillar dam body monitoring device. Background Art

[0002] When monitoring the coal pillar dam of an underground reservoir, a corresponding device is required. A seepage pressure monitoring device and a monitoring method for the damaged area of ​​the coal pillar dam of an underground reservoir with reference to the publication number CN112903558B include a seepage pressure monitoring tube, which is horizontally placed in the coal pillar dam and evenly arranged in the water immersion influence area, so that the monitoring data of the device is easy to analyze and accurate and effective. As described in the above patent, when the existing underground reservoir coal pillar dam monitoring device is used, the traditional method uses an expansion head to wrap the optical fiber, insert it into the monitored hole, and then inflate the expansion head to make it tight. Fitting the holes, transmitting strain information, however, this type of inflatable expansion head may leak, and the maintenance cycle is short. Gas is a compressible fluid and may deform under large external forces, resulting in errors in the transmission of strain information. In addition, since the detection components are distributed over a long period of time, it is difficult for users to accurately import or export them to the corresponding storage positions, which can easily cause the corresponding sensors and cables to be misplaced, affecting the installation and disassembly efficiency of the monitoring components, and easily causing messy wiring, which in turn affects subsequent monitoring. This product is installed using grouting packaging, and these problems will not occur. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a coal pillar dam monitoring device for an underground reservoir, which solves the problem that the detection end of the device is difficult to effectively introduce into the inner side of a protective steel pipe, affecting the installation efficiency of the device.

[0004] To achieve the above purpose, the utility model is implemented through the following technical solutions: a monitoring device for coal pillar dam of underground reservoir, including a protective steel pipe, the inner side of which is connected to a monitoring component for monitoring coal pillar dam of underground reservoir, the monitoring component including:

[0005] Packaging parts, installed on both sides of the protective steel pipe for packaging;

[0006] A monitoring installation component is connected to the inner side of a protective steel pipe and is used to monitor the coal pillar dam of an underground reservoir. The monitoring installation component includes an array of support rings slidably connected to the inner wall of the protective steel pipe. Connecting columns are installed on the front and rear sides of the support rings. Transmission optical cables are arranged on the inside of the connecting columns. Point sensors that fit the inner wall of the protective steel pipe are installed on the front and rear edges of the support rings. The transmission optical cables are connected to a mounting ring connected to the point sensor, and an optical fiber strain sensor is fixedly connected to the middle of the support ring.

[0007] Preferably, the packaging component includes connecting rings installed on the left and right sides of the protective steel pipe, and the two groups of connecting rings are respectively threadedly connected to a mounting cover, and wiring components electrically connected to the transmission optical cable and the optical fiber strain sensor are installed in the mounting cover, and the mounting cover is close to the inner side of the protective steel pipe and fits the side of the monitoring mounting component.

[0008] Preferably, the support ring includes a ring body that fits against the inner wall of the protective steel pipe, a slide groove that is slidably connected to the point sensor is provided on the side of the ring body, a mounting block for connecting the point sensor is installed near the end of the slide groove of the ring body, and positioning blocks that are fixedly connected to the optical fiber strain sensor are installed at the upper and lower ends of the inner side of the support ring.

[0009] Preferably, a screw threadedly connected to the mounting block is provided at the edge of the point sensor, and a positioning groove with a built-in wear-resistant gasket is provided near the end of the optical fiber strain sensor of the positioning block, and the wear-resistant gasket is fitted with the optical fiber strain sensor.

[0010] Preferably, a receiving groove that fits the transmission optical cable is provided on the inner side of the connecting column, and a slot communicating with the receiving groove is provided on the upper side of the connecting column.

[0011] Preferably, the protective steel pipe, support ring and connecting column are all made of stainless steel. The protective steel pipe is made of several steel pipes spliced ​​together. Four groups of square blocks are provided on the outer surface of the steel pipe. Through holes are provided in the square blocks. A steel wire rope is provided on the inner side of the protective steel pipe to fit the through holes.

[0012] Beneficial Effects

[0013] The utility model provides a monitoring device for coal pillar dam of underground reservoir. Compared with the prior art, it has the following beneficial effects:

[0014] (1) The underground reservoir coal pillar dam monitoring device, by setting detection installation parts in the device, allows the ring body, positioning block, installation block, connecting column, transmission optical cable, and installation ring to cooperate with each other, introduces several groups of point sensors into the protective steel pipe, and provides support for the optical fiber strain sensor, and facilitates the neat storage of the transmission optical cable, which is convenient for users to install and disassemble the corresponding monitoring components, thereby improving the installation efficiency. The ring body cooperates with the connecting column to provide support for the inner wall of the protective steel pipe, thereby improving the strength of the device. Moreover, since the protective steel pipe is spliced ​​by several steel pipes, the error of strain information transmission is reduced, thereby avoiding the problem of small space in the coal mine and inability to install.

[0015] (2) The underground reservoir coal pillar dam monitoring device sets a packaging component in the device so that the wiring components in the two sets of installation covers are respectively connected to the transmission optical cable and the two sides of the optical fiber strain sensor to achieve electrical connection, and then the two sets of installation covers are threadedly connected to the connecting rings on both sides of the protective steel pipe to achieve packaging on both sides of the protective steel pipe, thereby limiting the monitoring installation components and preventing them from falling out of the protective steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a partial cross-sectional view of the utility model;

[0017] Figure 2 For this utility model Figure 1 A partial enlarged view of the middle A;

[0018] Figure 3 It is an enlarged view of the inner support ring of the utility model;

[0019] Figure 4 It is a three-dimensional diagram of the utility model.

[0020] In the figure: 1. Protective steel pipe; 2. Packaging; 21. Connecting ring; 22. Mounting cover; 23. Wiring assembly; 3. Monitoring mounting piece; 31. Support ring; 311. Ring body; 312. Positioning block; 313. Mounting block; 32. Connecting column; 33. Transmission optical cable; 34. Mounting ring; 35. Point sensor; 36. Optical fiber strain sensor. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 4 , the utility model provides two technical solutions:

[0023] The first embodiment: a monitoring device for coal pillar dam of underground reservoir, comprising a protective steel pipe 1, the inner side of the protective steel pipe 1 is connected with a monitoring component for monitoring coal pillar dam of underground reservoir, the monitoring component comprises: a packaging component 2, installed on both sides of the protective steel pipe 1 for packaging; a monitoring mounting component 3, connected to the inner side of the protective steel pipe 1 for monitoring coal pillar dam of underground reservoir, the monitoring mounting component 3 comprises an array of support rings 31 slidably connected to the inner wall of the protective steel pipe 1, a connecting column 32 is installed on the front and rear sides of the support ring 31, a transmission optical cable 33 is arranged on the inner side of the connecting column 32, a point sensor 35 that fits the inner wall of the protective steel pipe 1 is installed on the front and rear edges of the support ring 31, the transmission optical cable 33 is connected to a mounting ring 34 connected to the point sensor 35, and a fiber optic strain sensor 36 is fixedly connected to the middle of the support ring 31;

[0024] The support ring 31 includes a ring body 311 that fits with the inner wall of the protective steel pipe 1. A slide groove that is slidably connected to the point sensor 35 is provided on the side of the ring body 311. A mounting block 313 for connecting the point sensor 35 is installed near the end of the slide groove of the ring body 311. Positioning blocks 312 that are fixedly connected to the optical fiber strain sensor 36 are installed at the upper and lower ends of the inner side of the support ring 31. A screw that is threadedly connected to the mounting block 313 is provided on the edge of the point sensor 35. A positioning groove with a built-in wear-resistant gasket is provided near the end of the optical fiber strain sensor 36 of the positioning block 312, and the wear-resistant gasket fits with the optical fiber strain sensor 36. A storage groove that fits with the transmission optical cable 33 is provided on the inner side of the connecting column 32, and a slot that communicates with the storage groove is provided on the upper side of the connecting column 32. The protective steel pipe 1, the support ring 31, and the connecting column 32 are all made of stainless steel. The protective steel pipe 1 is spliced ​​by several steel pipes. Four groups of square blocks are provided on the outer surface of the steel pipe. Through holes are provided in the square blocks. Steel wire ropes that fit the through holes are provided on the inner side of the protective steel pipe 1. The ring body 311, the positioning block 312, the mounting block 313, the connecting column 32, the transmission optical cable 33, and the mounting ring 34 cooperate with each other to introduce several groups of point sensors 35 into the protective steel pipe 1, and provide support for the optical fiber strain sensor 36, and facilitate the neat storage of the transmission optical cable 33. In addition, since the protective steel pipe 1 is spliced ​​by several steel pipes, the error of strain information transmission is reduced, and the problem of small space and inability to install in the coal mine underground is avoided.

[0025] The second embodiment: the packaging component 2 includes a connecting ring 21 installed on the left and right sides of the protective steel pipe 1, and the two groups of connecting rings 21 are respectively threadedly connected to a mounting cover 22. The mounting cover 22 is installed with a wiring assembly 23 electrically connected to the transmission optical cable 33 and the optical fiber strain sensor 36 respectively. The mounting cover 22 is close to the inner side of the protective steel pipe 1 and fits the side of the monitoring mounting component 3, so that the wiring assembly 23 in the two groups of mounting covers 22 is respectively connected to the transmission optical cable 33 and the optical fiber strain sensor 36 on both sides to achieve electrical connection, and then the two groups of mounting covers 22 are threadedly connected to the connecting rings 21 on both sides of the protective steel pipe 1 to achieve packaging of both sides of the protective steel pipe 1.

[0026] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0027] When in use, the user allows four groups of steel wire ropes to pass through the through grooves in the square blocks outside several steel pipes respectively, splices each section of steel pipe into a protective steel pipe 1 as a whole, engages the point sensor 35 with the slide groove on the side of the ring body 311 in turn, and uses the mounting block 313 in the slide groove to cooperate with the screw to install the point sensor 35 on the side of the ring body 311, inserts the transmission optical cable 33 into the storage groove in the connecting column 32, and then allows the corresponding optical cable in the transmission optical cable 33 to be electrically connected to the point sensor 35 through the mounting ring 34, and inserts the whole formed by the support ring 31, the connecting column 32, the positioning block 312, and the optical fiber strain sensor 36 into the inner wall of the protective steel pipe 1, and the outer surfaces of the support ring 31 and the point sensor 35 are in contact with the inner wall of the protective steel pipe 1;

[0028] The wiring components 23 in the two sets of installation covers 22 are respectively connected to the transmission optical cable 33 and the optical fiber strain sensor 36 on both sides to achieve electrical connection, and then the two sets of installation covers 22 are threadedly connected to the connecting rings 21 on both sides of the protective steel pipe 1 to achieve the encapsulation of the two sides of the protective steel pipe 1. At the same time, the two sets of installation covers 22 position and clamp the ring bodies 311 on both sides of the monitoring installation parts 3 in the protective steel pipe 1 to achieve the positioning processing of the monitoring installation parts 3. Holes are drilled in the required detection area of ​​the coal pillar, and the detection device is buried as a whole in the drilled holes in the coal pillar of the underground reservoir, wherein the square blocks on the outer surface of the protective steel pipe 1 provide support for it, and the protective steel pipe 1 is fixed by grouting in the gap between the coal pillars and the square tube and the outer surface of the protective steel pipe 1, and the wiring components 23 are electrically connected to the external controller, and the external controller detects the stress of the coal pillar in the area through the wiring components 23, the transmission optical cable 33, the point sensor 35, and the optical fiber strain sensor 36. The point sensor 35 and the optical fiber strain sensor 36 are both existing technologies, and their specific working principles and internal structures are not repeated here.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0030] 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 monitoring device for coal pillar dam of underground reservoir, comprising a protective steel pipe (1), characterized in that: The inner side of the protective steel pipe (1) is connected to a monitoring component for monitoring the coal pillar dam of an underground reservoir, and the monitoring component comprises: Packaging components (2) are installed on both sides of the protective steel pipe (1) for packaging; A monitoring mounting component (3) is connected to the inner side of a protective steel pipe (1) and is used to monitor the coal pillar dam of an underground reservoir. The monitoring mounting component (3) comprises an array of support rings (31) slidably connected to the inner wall of the protective steel pipe (1). The front and rear sides of the support ring (31) are both provided with connecting columns (32). A transmission optical cable (33) is arranged inside the connecting column (32). Point sensors (35) that are in contact with the inner wall of the protective steel pipe (1) are installed on the front and rear edges of the support ring (31). The transmission optical cable (33) is connected to a mounting ring (34) connected to the point sensor (35). An optical fiber strain sensor (36) is fixedly connected to the middle of the support ring (31).

2. The underground reservoir coal pillar dam monitoring device according to claim 1, characterized in that: The packaging component (2) includes connecting rings (21) installed on the left and right sides of the protective steel pipe (1), and two groups of the connecting rings (21) are respectively threadedly connected to a mounting cover (22), and the mounting cover (22) has a wiring assembly (23) installed therein that is electrically connected to a transmission optical cable (33) and an optical fiber strain sensor (36), respectively. The mounting cover (22) is close to the inner side of the protective steel pipe (1) and fits the side of the monitoring mounting component (3).

3. The underground reservoir coal pillar dam monitoring device according to claim 1, characterized in that: The support ring (31) comprises a ring body (311) which is fitted with the inner wall of the protective steel pipe (1); a sliding groove which is slidably connected to the point sensor (35) is provided on the side of the ring body (311); a mounting block (313) for connecting the point sensor (35) is installed near the end of the sliding groove of the ring body (311); and positioning blocks (312) which are fixedly connected to the optical fiber strain sensor (36) are installed at the upper end and the lower end of the inner side of the support ring (31).

4. The underground reservoir coal pillar dam monitoring device according to claim 3, characterized in that: The edge of the point sensor (35) is provided with a screw threadedly connected to the mounting block (313), and the positioning block (312) is provided with a positioning groove with a built-in wear-resistant gasket at the end close to the optical fiber strain sensor (36), and the wear-resistant gasket is fitted with the optical fiber strain sensor (36).

5. The underground reservoir coal pillar dam monitoring device according to claim 1, characterized in that: The inner side of the connecting column (32) is provided with a receiving groove that fits with the transmission optical cable (33), and the upper side of the connecting column (32) is provided with a slot that communicates with the receiving groove.

6. The underground reservoir coal pillar dam monitoring device according to claim 1, characterized in that: The protective steel pipe (1), the support ring (31), and the connecting column (32) are all made of stainless steel. The protective steel pipe (1) is formed by splicing a plurality of steel pipes. The outer surface of the steel pipe is provided with four groups of square blocks, each of which has a through hole. The inner side of the protective steel pipe (1) is provided with a steel wire rope that fits the through hole.

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