Underground mine paste filling body stress and deformation monitoring device

Abstract

The utility model relates to an underground mine paste filling body stress and deformation monitoring device, and belongs to the technical field of filling body monitoring. Comprising a longitudinal stand column and a plurality of fixing pipes, the longitudinal stand column is arranged in a roadway on one side of a filling body, the longitudinal stand column is formed by sequentially connecting a plurality of sets of stand columns, every two adjacent sets of stand columns are detachably spliced through connecting columns, and triangular inclined supporting frames are connected to the outer sides of the upper end and the lower end of the longitudinal stand column. According to the utility model, the plurality of groups of vertically arranged stress sensors are arranged and are directly pre-buried in the filling body, so that direct stress monitoring of the filling body at different height positions can be realized. A plurality of vertically arranged fixing pipes are pre-buried on one side, close to a roadway, of a filling body, and the fixing pipes are connected with adapting pipes at corresponding positions, so that the transverse and longitudinal deformation of the filling body at different heights can be monitored in real time, and the interference of filling undercut roof quantity on a monitoring result can be effectively avoided; therefore, more accurate deformation data can be provided.

Description

TECHNICAL FIELD

[0001] The utility model relates to filling body monitoring technical field especially relates to underground mine paste filling body stress and deformation monitoring device. BACKGROUND

[0002] A large number of goaf is produced in the process of underground coal mining, and the existence of goaf can threaten the safety production of underground coal mine, and can also cause surface subsidence, safety problems and ground ecological environment destruction. With the improvement of safety and environmental protection requirements, paste filling method is more and more widely used in the field of coal mine.

[0003] After paste filling, the filling body formed underground will replace the position of the original ore body and bear the important function of supporting the overlying rock mass. The stability of the filling body is directly related to the safety of surface buildings and the stable state of ecological environment, and the stress distribution state and the deformation of the filling body are the key indicators to judge the stability of the filling body.

[0004] The technical scheme commonly used in the industry at present is to monitor the relative displacement between the roof and the floor of the filling body in real time to calculate the stress state of the paste filling body, so as to realize the monitoring of the stress and deformation of the paste filling body. However, there is a certain filling under-joint roof amount in the process of paste filling. At this time, if the displacement between the roof and the floor is directly monitored, the filling under-joint roof amount will also be calculated in the deformation monitoring of the paste filling body, which will cause errors in the monitoring results of the stress and deformation of the paste filling body. Utility model content

[0005] To solve the above technical problems, the utility model provides a kind of underground mine paste filling body stress and deformation monitoring device. The technical scheme of the utility model is as follows:

[0006] The application discloses a stress and deformation monitoring device for underground mine paste filling body, which comprises a vertical column and a plurality of fixed pipes, the vertical column is arranged in a roadway on one side of the filling body, the vertical column is composed of a plurality of groups of separate columns connected in sequence, the separate columns are detachably spliced through connecting columns between adjacent two groups of the separate columns, the outer side of the upper and lower ends of the vertical column is connected with a triangular inclined bracing frame, the left side of each group of the vertical column is detachably connected with a side fixed plate, the left side of the side fixed plate is fixedly connected with an inner hollow fixed seat, a moving block is longitudinally slidably arranged in the inner part of the fixed seat, a longitudinal displacement sensor is arranged in the inner part of the fixed seat and below the moving block, a horizontal telescopic cylinder is connected to the left side of the moving block, the horizontal telescopic cylinder is internally provided with a horizontal displacement sensor, the left end of the horizontal telescopic cylinder is detachably connected with a receiving pipe, the plurality of fixed pipes are vertically arranged along the height direction of the filling body, the right end of each group of the fixed pipes is detachably connected with a corresponding receiving pipe, the left end of the fixed pipe is fixedly connected with a stress sensor through a fixed support, and the left end part of the fixed pipe and the stress sensor are embedded into the filling body.

[0007] Optionally, a threaded deep hole is formed in the upper surface of the separate column, a plug-in hole is formed in the lower surface of the separate column, an outer thread one is arranged at the outer lower end of the connecting column, the outer upper end of the connecting column is a smooth plug-in part, the lower end of the connecting column is threadedly connected with the threaded deep hole of the separate column below through the outer thread one, and the upper end of the connecting column is movably plugged into the plug-in hole of the separate column above through the smooth plug-in part.

[0008] Optionally, the uppermost separate column is fixedly connected with the roadway top wall through a plurality of triangular inclined bracing frames, the lowermost separate column is fixedly connected with the roadway bottom wall through a plurality of triangular inclined bracing frames, and the side of the triangular inclined bracing frame close to the roadway wall is fixedly connected with a base plate.

[0009] Optionally, a plurality of threaded side holes are longitudinally and equidistantly formed in the side of the separate column close to the side fixed plate, and the side fixed plate is adjustably fixedly connected with the corresponding threaded side hole through a bolt.

[0010] Optionally, the upper and lower surfaces of the fixed seat are both provided with openings, a side groove is formed in the side of the fixed seat close to the horizontal telescopic cylinder, square end covers are fixedly buckled on the upper and lower openings of the fixed seat through bolts, guide rails are symmetrically arranged in the front and back sides of the inner part of the fixed seat, sliding blocks are fixedly connected to the front and back sides of the moving block and slide with the guide rails, a connecting block is fixedly connected to the left side of the moving block and slidably connected in the inner part of the side groove, springs one are arranged between the upper and lower ends of the moving block and the two groups of square end covers, the longitudinal displacement sensor is arranged in the inner part of the lower spring one, the lower end of the longitudinal displacement sensor is fixedly connected with the lower square end cover, and the pull rod end of the longitudinal displacement sensor is fixedly connected with the moving block.

[0011] Optionally, the left side of the connecting block is fixedly connected with a fixed plate, the fixed plate is connected to the right side of the transverse telescopic cylinder, and the upper and lower sides of the fixed plate are fixedly connected with baffle plates for sealing the side grooves.

[0012] Optionally, the transverse telescopic cylinder comprises a fixed sleeve and a movable column, the fixed sleeve is fixedly connected to the left side of the fixed plate, the movable column is slidingly connected to the inner left side of the fixed sleeve, a spring No.2 is fixedly connected between the right end face of the movable column and the fixed sleeve, the transverse displacement sensor is located in the spring No.2, the transverse displacement sensor is fixedly connected to the inside of the fixed sleeve, and the pull rod end of the transverse displacement sensor is fixedly connected with the movable column.

[0013] Optionally, the left end face of the movable column is provided with an annular groove, and the right end of the receiving pipe is inserted into the annular groove and fixed through bolts.

[0014] Optionally, the outer wall left side of the receiving pipe is provided with external threads No.2, the fixed pipe is matched with the external threads No.2 of the left end of the receiving pipe through internal threads, and threaded sleeve connection is realized.

[0015] Optionally, the left end of the fixed pipe is threadedly connected with a round end cover, a stress sensor data line connected with the stress sensor passes through the round end cover and the inside of the fixed pipe in sequence, a side wall of the receiving pipe is provided with a wire outlet hole, and the stress sensor data line passes out from the wire outlet hole after passing through the inside of the fixed pipe.

[0016] All the optional technical solutions can be combined arbitrarily, and the structures after combination are not described in detail.

[0017] Through the above scheme, the beneficial effects of the utility model are as follows:

[0018] 1、The utility model discloses a plurality of groups of vertical arrangement's stress sensor are set up, and directly preburied in the filling body, can realize the direct stress monitoring of filling body at different height positions, effectively avoid the indirect measurement mode of traditional monitoring technology only relying on the displacement between top plate and bottom plate, this makes stress monitoring more accurate.

[0019] 2、Through preburied multiple vertical arrangement's fixed pipe on the side of filling body close to the roadway, and connect the fixed pipe with the receiving pipe of corresponding position, can realize the real -time monitoring of filling body on different height horizontal and longitudinal deformation, can effectively avoid the interference of filling under -top quantity to the monitoring result, thereby provide more accurate deformation data.

[0020] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, and can be implemented according to the content of the specification, the following is the preferred embodiment of the present application and the detailed description of the drawings as follows. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The underground mine paste filling body stress and deformation monitoring device provided by the present application is installed in cooperation with the filling body, and a structural schematic view is shown in the figure.

[0022] Figure 2 The overall appearance structure schematic view of the underground mine paste filling body stress and deformation monitoring device provided by the present application is shown in the figure.

[0023] Figure 3 The exploded structure schematic view of the underground mine paste filling body stress and deformation monitoring device provided by the present application is shown in the figure.

[0024] Figure 4 The exploded structure schematic view of the underground mine paste filling body stress and deformation monitoring device provided by the present application is shown in the figure.

[0025] Figure 5 The front view sectional view of the underground mine paste filling body stress and deformation monitoring device provided by the present application is shown in the figure.

[0026] Figure 6 The exploded structure schematic view of the underground mine paste filling body stress and deformation monitoring device provided by the present application is shown in the figure.

[0027] Figure 7 The exploded structure schematic view of the underground mine paste filling body stress and deformation monitoring device provided by the present application is shown in the figure.

[0028] Figure 8 The exploded structure schematic view of the underground mine paste filling body stress and deformation monitoring device provided by the present application is shown in the figure.

[0029] The figure label: 1, vertical column; 11, separate column; 111, threaded deep hole; 112, plug-in hole; 113, threaded side hole; 12, connecting column; 121, outer thread one; 2, triangular inclined support frame; 21, base plate; 3, side fixed plate; 4, fixed seat; 41, side groove; 42, square end cover; 43, guide rail; 5, moving block; 51, sliding block; 52, connecting block; 53, fixed plate; 54, baffle; 55, spring one; 56, longitudinal displacement sensor; 6, transverse telescopic cylinder; 61, fixed sleeve; 62, movable column; 621, annular groove; 63, spring two; 64, transverse displacement sensor; 7, receiving pipe; 71, wire outlet hole; 72, outer thread two; 8, fixed pipe; 81, round end cover; 82, fixed support; 9, stress sensor; 91, stress sensor data line; 100, filling body. DETAILED DESCRIPTION

[0030] The specific embodiments of the utility model are described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0031] Please refer to Figures 1-8 The utility model provides a kind of underground mine paste filling body stress and deformation monitoring device, including vertical column 1 and multiple fixed pipes 8, vertical column 1 is arranged in the roadway of one side of filling body 100, vertical column 1 is connected by multiple groups of separate column 11 in turn, and the adjacent two groups of separate column 11 are detachably spliced by connecting column 12, the upper and lower ends of vertical column 1 are connected with triangular inclined support frame 2, the left side of each vertical column 1 is detachably connected with side fixed plate 3, the left side of side fixed plate 3 is fixedly connected with the fixed seat 4 of internal empty type, moving block 5 is slidably arranged in the inside of fixed seat 4, longitudinal displacement sensor 56 is installed in the inside of fixed seat 4 and below moving block 5, the left side of moving block 5 is connected with transverse telescopic cylinder 6, transverse displacement sensor 64 is built-in in transverse telescopic cylinder 6, receiving pipe 7 is detachably connected to the left end of transverse telescopic cylinder 6, multiple fixed pipes 8 are vertically arranged along the height direction of filling body 100, and the right end of each group of fixed pipes 8 is detachably connected with the corresponding position of receiving pipe 7, stress sensor 9 is fixedly connected to the left end of fixed pipe 8 by fixed support 82, and the left end portion of fixed pipe 8 and stress sensor 9 are embedded into the inside of filling body 100.

[0032] The installation process of the device: first, during the filling of the filling body 100, a plurality of fixed pipes 8 and stress sensors 9 arranged in a vertical arrangement are pre-buried in the filling body 100, and the right end of the fixed pipe 8 needs to extend out of the filling body 100 towards the side of the roadway. Second, according to the height of the roadway, a plurality of separate columns 11 and connecting columns 12 are assembled in turn to ensure that the upper end of the vertical column 1 is securely fixed to the top wall of the roadway, and the lower end of the vertical column 1 needs to be fixed to the bottom wall of the roadway. Third, the receiving pipe 7 is installed to the right end of the fixed pipe 8, then the horizontal telescopic cylinder 6 is connected to the right end of the receiving pipe 7, and finally the side fixing plate 3 is installed at the appropriate position on one side of the separate column 11.

[0033] Specifically, when the filling body 100 undergoes lateral deformation, the horizontal telescopic cylinder 6 will indirectly expand and contract through the fixed pipe 8 and the receiving pipe 7. At this time, the horizontal displacement sensor 64 in the horizontal telescopic cylinder 6 can accurately measure the displacement change of the filling body 100 in the horizontal direction, and further calculate the lateral deformation state of the filling body 100. When the filling body 100 undergoes longitudinal deformation, the moving block 5 will indirectly slide in the vertical direction in the fixed seat 4 through the fixed pipe 8, the receiving pipe 7 and the horizontal telescopic cylinder 6. At this time, the longitudinal displacement sensor 56 of the fixed seat 4 can accurately measure the displacement change of the filling body 100 in the longitudinal direction, and further calculate the longitudinal deformation state of the filling body 100.

[0034] Specifically, by arranging a plurality of vertically arranged stress sensors 9 and directly pre-buried in the filling body 100, direct stress monitoring of the filling body 100 at different height positions can be achieved, effectively avoiding the indirect measurement method relying only on the displacement between the top plate and the bottom plate in the traditional monitoring technology, which makes the stress monitoring more accurate.

[0035] It should be noted that during the filling process, the filling retaining wall on one side of the filling body 100 can be used to fix the actual position of the fixed pipe 8 in the filling body 100, preventing the fixed pipe 8 from shifting or displacing before the filling body 100 solidifies. After the subsequent filling retaining wall is removed or the surrounding structure of the fixed pipe 8 is removed, the fixed pipe 8 is connected to the corresponding receiving pipe 7.

[0036] Further, the upper surface of the separate column 11 is provided with a threaded deep hole 111, the lower surface of the separate column 11 is provided with a plug-in hole 112, the outer lower end of the connecting column 12 is provided with an external thread 121, the outer upper end of the connecting column 12 is a smooth plug-in part, the lower end of the connecting column 12 is threadedly connected to the threaded deep hole 111 of the lower separate column 11 through the external thread 121, and the upper end of the connecting column 12 is movably plugged into the plug-in hole 112 of the upper separate column 11 through the smooth plug-in part.

[0037] Specifically, when connecting two adjacent groups of separate columns 11 using the connecting column 12, only need to screw the lower end of the connecting column 12 into the threaded deep hole 111 of the lower separate column 11, and then insert the upper separate column 11 into the upper end of the connecting column 12, so as to complete the splicing work. After splicing is completed, the depth of the connecting column 12 inserted into the lower separate column 11 can be changed by rotating the connecting column 12. Through this adjustment mode, the overall height change of the vertical column 1 can be accurately controlled, so as to achieve the required installation height.

[0038] Further, the uppermost separate column 11 is fixedly connected with the roadway top wall through a plurality of triangular bracing frames 2, and the lowermost separate column 11 is fixedly connected with the roadway bottom wall through a plurality of triangular bracing frames 2. The triangular bracing frame 2 is fixedly connected with a base plate 21 on the side close to the roadway wall.

[0039] Specifically, the triangular bracing frame 2 can be installed on the front and back sides of the separate column 11 and the side away from the filling body 100, thereby providing stable position support for the separate column 11. By arranging the base plate 21, the fixing area of the triangular bracing frame 2 and the roadway wall can be increased.

[0040] Further, a plurality of threaded side holes 113 are longitudinally and equidistantly arranged on the side of the separate column 11 close to the side fixing plate 3, and the side fixing plate 3 is adjustably fixedly connected with the corresponding threaded side hole 113 through a bolt.

[0041] Specifically, the relative position of the side fixing plate 3 and the separate column 11 can be adjusted according to actual needs. When adjusting, only need to insert the bolt for fixing into the corresponding threaded side hole 113, and then tighten the bolt to complete the fixing.

[0042] Further, the upper and lower surfaces of the fixing seat 4 are both open, a side groove 41 is arranged on the side of the fixing seat 4 close to the horizontal telescopic cylinder 6, the upper and lower openings of the fixing seat 4 are both buckled with a square end cover 42 through a bolt, the front and rear sides of the inside of the fixing seat 4 are symmetrically fixedly provided with a guide rail 43, the front and rear sides of the moving block 5 are both fixedly connected with a sliding block 51 which slides with the guide rail 43, the left side of the moving block 5 is fixedly connected with a connecting block 52 which is slidingly connected in the inside of the side groove 41, the upper and lower ends of the moving block 5 are both abutted with a spring I 55 between the two square end covers 42, a longitudinal displacement sensor 56 is arranged in the inside of the lower spring I 55, the lower end of the longitudinal displacement sensor 56 is fixedly connected with the lower square end cover 42, the pull rod end of the longitudinal displacement sensor 56 is fixedly connected with the moving block 5, and a hole is arranged on the side wall of the fixing seat 4 for the data line of the longitudinal displacement sensor 56 to pass out.

[0043] Specifically, the square end cover 42 adopts a detachable structure, which facilitates subsequent maintenance and replacement of the internal parts of the fixing seat 4. When the filling body 100 undergoes longitudinal deformation, it will drive the fixed tube 8 to undergo vertical displacement changes. At this time, the fixed tube 8 will indirectly drive the moving block 5 to move vertically inside the fixing seat 4 through the receiving tube 7 and the horizontal telescopic cylinder 6, thereby driving the displacement of the pull rod end of the longitudinal displacement sensor 56, and further obtaining the displacement change of the filling body 100 in the longitudinal direction. During the vertical movement of the moving block 5, the moving block 5 drives the two sliders 51 to slide in the guide rail 43, and the guide rail 43 limits and guides the sliders 51 to avoid deviation. The two groups of springs 55 are respectively abutted on the upper and lower ends of the moving block 5, and can elastically fix the moving block 5 in the middle position of the fixing seat 4 through the elastic force, so as to ensure that the moving block 5 has enough space to move vertically. Secondly, the two groups of springs 55 cooperate with the longitudinal displacement sensor 56, so that the longitudinal displacement sensor 56 counts more accurately and stably.

[0044] Further, the left side of the connecting block 52 is fixedly connected with the fixed plate 53, and the fixed plate 53 is connected to the right side of the horizontal telescopic cylinder 6. The upper and lower sides of the fixed plate 53 are fixedly connected with the baffles 54 for sealing the side groove 41.

[0045] Specifically, the side groove 41 provides a sliding position for the connecting block 52, ensuring that the connecting block 52 can smoothly slide along the side groove 41. When the connecting block 52 slides along the side groove 41, it will drive the fixed plate 53 and the baffles 54 on both sides to move synchronously, ensuring that the side groove 41 is always within the protection range of the baffles 54, thereby preventing dust and other substances in the underground mine from entering the inside of the fixing seat 4.

[0046] Further, the horizontal telescopic cylinder 6 includes a fixed sleeve 61 and a movable column 62. The fixed sleeve 61 is fixedly connected to the left side of the fixed plate 53, and the movable column 62 is slidingly connected to the inside left side of the fixed sleeve 61. The right end face of the movable column 62 and the fixed sleeve 61 are fixedly connected with the spring 63. The horizontal displacement sensor 64 is located inside the spring 63, and the horizontal displacement sensor 64 is fixedly connected to the inside of the fixed sleeve 61. The pull rod end of the horizontal displacement sensor 64 is fixedly connected with the movable column 62. Holes are provided on the side wall of the fixed sleeve 61 for the data lines of the horizontal displacement sensor 64 to pass out.

[0047] Specifically, when the filling body 100 occurs lateral deformation, the fixed pipe 8 will be driven to change the horizontal displacement, at this time, the fixed pipe 8 will drive the movable column 62 to move horizontally in the fixed sleeve 61 through the receiving pipe 7, so as to drive the displacement of the pull rod end of the lateral displacement sensor 64 to change, and then the displacement change of the filling body 100 in the lateral direction is obtained. The spring two 63 cooperates with the lateral displacement sensor 64, so that the counting of the lateral displacement sensor 64 is more accurate and stable.

[0048] Further, the left end surface of the movable column 62 is provided with an annular groove 621, and the right end of the receiving pipe 7 is inserted into the annular groove 621 and fixed by bolts.

[0049] Specifically, when connecting the receiving pipe 7 and the lateral telescopic cylinder 6, only the right end of the receiving pipe 7 is inserted into the annular groove 621, and then fixed by bolts. In order to enhance the stability of the connection, the right end of the receiving pipe 7 can be provided with a bolt abutting groove on the outside, which makes the bolt better tightly fix the receiving pipe 7.

[0050] Further, the outer wall left side of the receiving pipe 7 is provided with external thread two 72, and the fixed pipe 8 is screwed with the external thread two 72 of the left end of the receiving pipe 7 through the internal thread to realize the threaded sleeve.

[0051] Specifically, when connecting the receiving pipe 7 and the fixed pipe 8, only the left end of the receiving pipe 7 is screwed into the right end of the fixed pipe 8, which is simple and efficient.

[0052] Further, the left end of the fixed pipe 8 is connected with a round end cover 81, and the stress sensor data line 91 connected with the stress sensor 9 penetrates the round end cover 81 and the inside of the fixed pipe 8 in sequence, and the side wall of the receiving pipe 7 is provided with a wire outlet hole 71, and the stress sensor data line 91 penetrates out of the wire outlet hole 71 after passing through the inside of the fixed pipe 8.

[0053] Specifically, the stress sensor data line 91 can enter the inside of the fixed pipe 8 through the round end cover 81, and then pass out of the right end opening of the fixed pipe 8. After the receiving pipe 7 and the fixed pipe 8 are connected, the stress sensor data line 91 enters from the left end opening of the receiving pipe 7, and finally penetrates out of the wire outlet hole 71 provided on the side wall of the receiving pipe 7. The function of the round end cover 81 is to avoid the filling slurry entering through the left end opening of the fixed pipe 8 during the filling process.

[0054] It should be noted that in the present embodiment, the stress sensor 9 can be a piezoelectric stress sensor or other types of stress sensor 9, which can be embedded in the filling body 100 for stress monitoring. At the same time, the longitudinal displacement sensor 56 and the transverse displacement sensor 64 can be linear displacement sensors, which can accurately monitor the displacement changes of the filling body 100 in the longitudinal and transverse directions. The data lines of all these sensors (including the stress sensor 9, the longitudinal displacement sensor 56 and the transverse displacement sensor 64) need to be connected to the monitoring station or data acquisition substation in the well to ensure that the stress and displacement data fed back by each sensor are transmitted to the ground monitoring center in real time through the data transmission system. In this way, the staff can receive monitoring data from each sensor at any time, so as to master the stress and deformation of the filling body 100 in real time.

[0055] The above is only the preferred embodiment of the present application, and is not used to limit the present application. It should be noted that for ordinary skilled persons in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should be considered as the protection scope of the present application.

Claims

1. A device for monitoring the stress and deformation of paste-filled bodies in underground mines, characterized in that: The system includes a longitudinal column (1) and multiple fixed pipes (8). The upper and lower ends of the longitudinal column (1) are fixed to the top and bottom walls of the roadway on one side of the filling body (100), respectively. The longitudinal column (1) is composed of multiple sets of columns (11) connected in sequence. Adjacent sets of columns (11) can be detachably spliced ​​together by connecting columns (12). Triangular bracing frames (2) are connected to the outer sides of the upper and lower ends of the longitudinal column (1). A side fixing plate (3) is detachably connected to the left side of each set of longitudinal columns (1). A hollow fixing seat (4) is fixedly connected to the left side of the side fixing plate (3). A moving block (5) is longitudinally slidably arranged inside the fixing seat (4). The fixing seat (4) is located inside and in the middle of the fixing plate (4). A longitudinal displacement sensor (56) is installed below the movable block (5). A transverse telescopic cylinder (6) is connected to the left side of the movable block (5). A transverse displacement sensor (64) is built into the transverse telescopic cylinder (6). A receiving pipe (7) is detachably connected to the left end of the transverse telescopic cylinder (6). Multiple fixed pipes (8) are arranged vertically along the height direction of the filling body (100). The right end of each set of fixed pipes (8) is detachably connected to the receiving pipe (7) at the corresponding position. A stress sensor (9) is fixedly connected to the left end of the fixed pipe (8) through a fixed bracket (82). The left end of the fixed pipe (8) and the stress sensor (9) are both pre-embedded inside the filling body (100).

2. The device for monitoring the stress and deformation of underground mine paste filling bodies according to claim 1, characterized in that, The upper surface of the split column (11) is provided with a threaded deep hole (111), the lower surface of the split column (11) is provided with a plug hole (112), the lower outer end of the connecting column (12) is provided with an external thread (121), the upper outer end of the connecting column (12) is a smooth plug part, the lower end of the connecting column (12) is threadedly connected to the threaded deep hole (111) of the split column (11) below through the external thread (121), and the upper end of the connecting column (12) is movably inserted into the plug hole (112) of the split column (11) above through the smooth plug part.

3. The device for monitoring the stress and deformation of underground mine paste filling bodies according to claim 1, characterized in that, The uppermost column (11) is fixedly connected to the top wall of the tunnel through multiple sets of triangular bracing frames (2), and the lowermost column (11) is fixedly connected to the bottom wall of the tunnel through multiple sets of triangular bracing frames (2). The triangular bracing frame (2) has a base plate (21) fixedly connected to the side of the tunnel wall.

4. The device for monitoring the stress and deformation of underground mine paste filling bodies according to claim 1, characterized in that, The column (11) has multiple threaded side holes (113) longitudinally and equidistantly opened on one side near the side fixing plate (3). The side fixing plate (3) is adjustablely fixed to the threaded side holes (113) at the corresponding positions by bolts.

5. The device for monitoring the stress and deformation of underground mine paste filling bodies according to claim 1, characterized in that, The upper and lower surfaces of the fixed base (4) are both open. A side groove (41) is provided through the side of the fixed base (4) near the transverse telescopic cylinder (6). The upper and lower openings of the fixed base (4) are both fixed with square end caps (42) by bolts. The front and rear sides of the fixed base (4) are symmetrically fixed with guide rails (43). The front and rear sides of the moving block (5) are both fixedly connected with sliders (51) that cooperate with the guide rails (43). The left side of the moving block (5) is fixedly connected with a connecting block (52). The connecting block (52) is slidably connected inside the side groove (41). The upper and lower ends of the moving block (5) are abutted against the two sets of square end caps (42) by springs (55). The longitudinal displacement sensor (56) is installed inside the lower spring (55). The lower end of the longitudinal displacement sensor (56) is fixedly connected to the lower square end cap (42). The pull rod end of the longitudinal displacement sensor (56) is fixedly connected to the moving block (5).

6. The device for monitoring the stress and deformation of underground mine paste filling bodies according to claim 5, characterized in that, A fixing plate (53) is fixedly connected to the left side of the connecting block (52). The fixing plate (53) is connected to the right side of the transverse telescopic cylinder (6). Baffles (54) for sealing the side groove (41) are fixedly connected to both the upper and lower sides of the fixing plate (53).

7. The device for monitoring the stress and deformation of underground mine paste filling bodies according to claim 6, characterized in that, The transverse telescopic cylinder (6) includes a fixed sleeve (61) and a movable column (62). The fixed sleeve (61) is fixedly connected to the left side of the fixed plate (53). The movable column (62) is slidably connected to the left side inside the fixed sleeve (61). A second spring (63) is fixedly connected between the right end face of the movable column (62) and the fixed sleeve (61). The transverse displacement sensor (64) is located inside the second spring (63). The transverse displacement sensor (64) is fixedly connected inside the fixed sleeve (61). The pull rod end of the transverse displacement sensor (64) is fixedly connected to the movable column (62).

8. The stress and deformation monitoring device for underground mine paste filling bodies according to claim 7, characterized in that, The left end face of the movable column (62) is provided with an annular groove (621), and the right end of the receiving pipe (7) is inserted into the annular groove (621) and the two are fixed together by bolts.

9. The device for monitoring the stress and deformation of underground mine paste filling bodies according to claim 1, characterized in that, The outer wall of the receiving pipe (7) is provided with an external thread two (72) on the left side. The fixed pipe (8) is engaged with the external thread two (72) at the left end of the receiving pipe (7) through the internal thread to achieve threaded connection.

10. A device for monitoring the stress and deformation of underground mine paste filling bodies according to claim 1, characterized in that, The left end of the fixed tube (8) is threaded with a round end cap (81). The stress sensor data line (91) connected to the stress sensor (9) passes through the round end cap (81) and the inside of the fixed tube (8) in sequence. The side wall of the receiving tube (7) is provided with a wire outlet hole (71). The stress sensor data line (91) passes through the inside of the fixed tube (8) and then exits from the wire outlet hole (71).

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