Gob-side entry retaining surrounding rock deformation observation equipment

Abstract

The utility model discloses gob-side entry retaining surrounding rock deformation observation equipment which comprises a pair of first supporting columns and a pair of second supporting columns, a cover plate is fixedly connected to the pair of second supporting columns, first groove bodies matched with the second supporting columns are formed in the first supporting columns, the second supporting columns are connected into the first groove bodies in a sliding mode, and the cover plate is fixedly connected to the first supporting columns. A spring is fixedly connected to the second supporting column, the end, away from the second supporting column, of the spring is fixedly connected to the bottom wall of the first groove body, a marking line is arranged on the second supporting column, a second groove body matched with the marking line is formed in the first supporting column, and an indicating assembly is installed in the second groove body. The indication assembly comprises an indication column which is installed in the second groove body. According to the gob-side entry retaining surrounding rock deformation observation equipment, the sinkage of a roadway top plate can be observed conveniently, the labor amount of workers is saved, and meanwhile the observation efficiency can be improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of gob-side tunnel observation equipment, specifically relating to a gob-side tunnel surrounding rock deformation observation equipment. Background Technology

[0002] The use of goaf-side roadway retention technology can significantly reduce the amount of roadway excavation work, lower the investment in excavation equipment, material consumption during the excavation process, and labor costs. When retaining roadways along the goaf, the stress balance of the original rock is disrupted, and the weight of the overlying strata shifts to the periphery of the retained roadway. This results in the surrounding rock at the top of the roadway bearing significant vertical pressure, which can easily cause deformation and subsidence of the roof strata, leading to dangerous situations such as roof collapses and posing safety hazards to coal mine operations.

[0003] Currently, the commonly used method for monitoring tunnel deformation is the cross-point method. This method involves a large amount of testing work and cannot be completed by a single person. This not only consumes a lot of manpower but also increases the measurement time, affecting the efficiency of observation.

[0004] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide a device for monitoring the deformation of the surrounding rock in a goaf-retention tunnel.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a device for observing the deformation of surrounding rock along a goaf, which can be used to solve the above-mentioned problems.

[0007] To achieve the above objectives, a specific embodiment of this utility model provides a rock deformation monitoring device for roadway entry, comprising a pair of first support columns and a pair of second support columns. A cover plate is fixedly connected to each of the second support columns. A first groove matching the second support column is formed on each of the first support columns. The second support columns are slidably connected within the first groove. A spring is fixedly connected to each of the second support columns, with one end of the spring away from the second support column fixedly connected to the bottom wall of the first groove. A marking line is provided on each of the second support columns. A second groove matching the marking line is formed on each of the first support columns. An indicator component is installed within the second groove, comprising an indicator column installed within the second groove.

[0008] In one or more embodiments of this utility model, a support foot is installed on the first support column, and a third screw is fixedly connected to the support foot. The third screw is threadedly connected to the end of the first support column away from the second support column.

[0009] In one or more embodiments of the utility model, the opposite groove wall of second groove body is equipped with third groove body matched with indicating column, indicating column is connected in third groove body

[0010] In one or more embodiments of the utility model, fourth fixed plate is fixedly connected on indicating column, a pair of fixed blocks are fixedly connected on fourth fixed plate, sixth groove body is equipped on fixed block, sliding block is connected in sixth groove body, second screw rod is fixedly connected on sliding block, rotating column is equipped on a pair of second screw rod, second internal thread matched with second screw rod is equipped on rotating column.

[0011] In one or more embodiments of the utility model, the thread rotation direction of a pair of second screw rod is opposite.

[0012] In one or more embodiments of the utility model, rubber layer is bonded on sliding block.

[0013] In one or more embodiments of the utility model, connecting column is fixedly connected on second support column, fourth groove body matched with connecting column is equipped on first support column, connecting column penetrates fourth groove body, alarm assembly is installed on first support column.

[0014] In one or more embodiments of the utility model, the alarm assembly comprises first fixed plate, first fixed plate is fixedly connected on first support column, battery is installed on first fixed plate, alarm is installed on battery, a pair of second fixed plates are fixedly connected on first fixed plate, third fixed plate is installed on a pair of second fixed plates, switch is installed on third fixed plate, switch is matched with battery.

[0015] In one or more embodiments of the utility model, fifth groove body is equipped on second fixed plate, first screw rod matched with fifth groove body is fixedly connected on third fixed plate, third fixed plate is connected between a pair of second fixed plates through first screw rod.

[0016] In one or more embodiments of the utility model, first screw rod penetrates fifth groove body, locking cap is threadedly connected on first screw rod.

[0017] Compared with prior art, the utility model discloses a kind of along empty roadway retaining surrounding rock deformation observation equipment, can be convenient for the subsidence of roadway roof is observed, save the labor amount of staff while also being able to improve observation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0019] Figure 1 It is a structural schematic view of the surrounding rock deformation observation equipment along the gob-side entry retaining in an embodiment of the present application.

[0020] Figure 2 It is a sectional view of the first supporting column of the surrounding rock deformation observation equipment along the gob-side entry retaining in an embodiment of the present application.

[0021] Figure 3 It is a structural schematic view of the first supporting column of the surrounding rock deformation observation equipment along the gob-side entry retaining in an embodiment of the present application. Figure 2

[0022] Figure 4

[0023] Figure 5 It is a structural schematic view of the first supporting column of the surrounding rock deformation observation equipment along the gob-side entry retaining in an embodiment of the present application. Figure 4

[0024] Figure 6 It is a structural schematic view of the indicating assembly of the surrounding rock deformation observation equipment along the gob-side entry retaining in an embodiment of the present application.

[0025] Figure 7 It is a structural schematic view of the alarm assembly of the surrounding rock deformation observation equipment along the gob-side entry retaining in an embodiment of the present application.

[0026] Main drawing mark explanation:

[0027] 1, first supporting column; 101, first internal thread; 11, first groove body; 12, second groove body; 121, third groove body; 13, fourth groove body; 2, second supporting column; 21, identification line; 22, connecting column; 23, spring; 3, cover plate; 4, first fixed plate; 41, battery; 411, alarm; 42, second fixed plate; 421, fifth groove body; 43, third fixed plate; 431, switch; 432, first screw rod; 44, locking cap; 5, indicating column; 501, magnet block; 51, fourth fixed plate; 52, fixed block; 521, sixth groove body; 53, sliding block; 531, second screw rod; 532, rubber layer; 54, rotating column; 541, second internal thread; 6, supporting foot; 61, third screw rod. DETAILED DESCRIPTION

[0028] ​​​To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0029] like Figures 1 to 6 As shown, an embodiment of the present invention discloses a rock deformation monitoring device for roadway entry, comprising a pair of first support columns 1 and a pair of second support columns 2. A cover plate 3 is welded onto the second support columns 2, and the shape of the cover plate 3 matches the roadway. A first groove 11 matching the second support column 2 is formed on the first support column 1. The second support column 2 is slidably connected within the first groove 11. A spring 23 is welded onto the second support column 2, with one end of the spring 23 away from the second support column 2 welded to the bottom wall of the first groove 11. A marker line 21 is provided on the second support column 2, and a second groove 12 matching the marker line 21 is formed on the first support column 1. An indicator post 5 for indicating the marker line 21 is installed within the second groove 12.

[0030] Specifically, a deformation monitoring device is installed every 20m in the tunnel. During installation, a pair of first support columns 1 are erected at the bottom of the tunnel, and the cover plate 3 is fixed on the roof rock layer of the tunnel. When the top of the tunnel deforms, it will press down on the cover plate 3, which will press on the second support column 2. After the second support column 2 is under pressure, it slides down in the first groove 11 and compresses the spring 23. At this time, the value of the indicator line 21 of the indicator column 5 will change, thereby determining whether the tunnel is deformed.

[0031] Because the height varies at different locations within the tunnel, a support foot 6 is installed on the first support column 1. A third screw 61 is welded to the support foot 6, and the third screw 61 is threaded to the end of the first support column 1 furthest from the second support column 2. The first support column 1 is erected in the tunnel by the support foot 6, and the overall length of the support foot 6 and the first support column 1 can be adjusted by rotating the support foot 6, so that the cover plate 3 can fit against the roof strata of the tunnel.

[0032] Specifically, the first support column 1 has a first internal thread 101 that matches the third screw 61. When the support foot 6 is rotated clockwise, the third screw 61 gradually enters the first internal thread 101, and the overall length of the first support column 1 and the support foot 6 decreases. When the support foot 6 is rotated counterclockwise, the third screw 61 gradually exits from the first internal thread 101, and the overall length of the first support column 1 and the support foot 6 increases. This allows the cover plate 3 to fit snugly against the surrounding rock of the tunnel roof.

[0033] It is worth noting that because the rotation of the support foot 6, the roadway roof surrounding rock and the cover plate 3 will produce a certain pressure, resulting in the second support column 2 will be slightly sliding into the first slot body 11, at this time the indicator column 5 and the zero line position of the identification line 21 is staggered, which brings inconvenience for subsequent observation.

[0034] In order to solve this problem, a third slot body 121 matched with the indicator column 5 is arranged on the opposite slot wall of the second slot body 12, and the indicator column 5 is slidingly connected in the third slot body 121.

[0035] Specifically, after the deformation observation equipment is installed, the indicator column 5 is slid to make the indicator column 5 coincide with the zero line position of the identification line 21, and the subsequent value indicated by the indicator column 5 indicates the deformation value, which is convenient for observation.

[0036] Further, in order to fix the position of the indicator column 5 in the third slot body 121, a fourth fixed plate 51 is welded on the indicator column 5, and a pair of fixed blocks 52 are welded on the fourth fixed plate 51. A sixth slot body 521 is arranged on the fixed block 52, and a sliding block 53 is slidingly connected in the sixth slot body 521. A second screw 531 is welded on the end of the sliding block 53 away from the third slot body 121, and a rotating column 54 is arranged on the pair of second screws 531. A second internal thread 541 matched with the second screw 531 is arranged on the rotating column 54.

[0037] Specifically, the threads of the pair of second screws 531 are opposite in rotation direction. When adjusting the position of the indicator column 5, the rotating column 54 is counterclockwise rotated, and the pair of second screws 531 gradually rotate into the second internal thread 541. At this time, the pair of sliding blocks 53 and the opposite slot walls of the third slot body 121 are separated, and the indicator column 5 can be smoothly slid in the third slot body 121. After adjusting the position of the indicator column 5, the rotating column 54 is counterclockwise rotated, and the pair of second screws 531 gradually rotate out of the second internal thread 541. The side walls of the pair of sliding blocks 53 and the opposite slot walls of the third slot body 121 are connected, and the indicator column 5 can be locked to be fixed in the third slot body 121.

[0038] In addition, a magnet block 501 can also be embedded on the opposite side wall of the third slot body 121 where the indicator column 5 slides. The magnetic attraction force between the magnet block 501 and the slot wall of the third slot body 121 can also fix the position of the indicator column 5. This way is simpler in structure. However, vibration may occur during coal mining, and this way is not very firm.

[0039] Further, a rubber layer 532 is bonded on the end of the sliding block 53 close to the slot wall of the third slot body 121. The rough surface of the rubber layer 532 can increase the friction force between the sliding block 53 and the slot wall of the third slot body 121, and the resilience of the rubber layer 532 can also increase the friction force between the sliding block 53 and the third slot body 121, which further enhances the fixing effect of the indicator column 5.

[0040] It is worth noting that coal mining is dangerous, in order to issue an alarm when the deformation of the roadway exceeds the warning line, prompting staff to evacuate urgently, as shown in Figure 1 、 Figure 2 、 Figure 3 and Figure 7 welded on the second support column 2, the first support column 1 is provided with a fourth slot body 13 matched with the connecting column 22, and the connecting column 22 penetrates the fourth slot body 13. When the second support column 2 slides downward in the first slot body 11, the connecting column 22 also slides downward in the fourth slot body 13. The first support column 1 is provided with an alarm assembly matched with the connecting column 22.

[0041] The alarm assembly comprises a first fixed plate 4 welded on the outer wall of the first support column 1, a battery 41 mounted on the first fixed plate 4, and an alarm 411 mounted on the battery 41. A pair of second fixed plates 42 are welded on the first fixed plate 4, a third fixed plate 43 is mounted on the pair of second fixed plates 42, a switch 431 is mounted on the third fixed plate 43, and the switch 431 is matched with the battery 41.

[0042] Specifically, the maximum deformation of the gob-side entry is calculated by engineers before the project starts, and the distance between the lower end of the connecting column 22 and the switch 431 matches the maximum deformation of the gob-side entry. During the process of coal mining or construction, if the roof of the roadway appears to sink, it will first press on the cover plate 3, and after the cover plate 3 presses the second support column 2, the second support column 2 slides downward in the first slot body 11, and the connecting column 22 will press on the switch 431. After the switch 431 is pressed, the alarm 411 will sound an alarm to prompt the staff to evacuate urgently, providing protection for the safety of the staff.

[0043] Further, a fifth slot body 421 is provided on the second fixed plate 42, and a first screw 432 matched with the fifth slot body 421 is welded on the opposite side wall of the third fixed plate 43, and the third fixed plate 43 is slidably connected between the pair of second fixed plates 42 through the first screw 432. Specifically, the distance between the switch 431 and the connecting column 22 can be changed by the up and down sliding of the third fixed plate 43 between the pair of second fixed plates 42, so as to facilitate the adjustment of the height of the third fixed plate 43 according to the maximum allowable deformation of the roadway.

[0044] Further, the first screw 432 penetrates the fifth slot body 421, and a locking cap 44 is threadedly connected on the first screw 432. After adjusting the height of the third fixed plate 43 in the pair of second fixed plates 42, the third fixed plate 43 is fixed between the pair of second fixed plates 42 by screwing the locking cap 44.

[0045] In use, a pair of first support columns 1 are erected in the roadway, and a pair of first support columns 1 are respectively located on both sides of the roadway, and the cover plate 3 is adjusted to be in close contact with the roof surrounding rock of the roadway by adjusting the support foot 6. When the roof of the roadway deforms and sinks, the second support column 2 will slide downward in the first groove body 11, and the deformation amount of the roof of the roadway can be judged by observing the value of the indicating column 5 on the identification line 21, and the detection personnel can record the value every shift to ensure the safety of the staff. In addition, if the deformation amount of the roadway exceeds the warning line during construction, the alarm 411 will also alarm, further providing protection for the life safety of the staff.

[0046] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0047] In addition, it should be understood that although the present application is described in the specification in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A device for observing the deformation of surrounding rock in a goaf-retention tunnel, characterized in that, It includes a pair of first support columns and a pair of second support columns. A cover plate is fixedly connected to the pair of second support columns. A first groove matching the second support column is opened on the first support column. The second support column is slidably connected to the first groove. A spring is fixedly connected to the second support column. The end of the spring away from the second support column is fixedly connected to the bottom wall of the first groove. A marking line is provided on the second support column. A second groove matching the marking line is opened on the first support column. An indicator component is installed in the second groove. The indicator component includes an indicator column, which is installed in the second groove.

2. The rock deformation monitoring device for roadway entry as described in claim 1, characterized in that, The first support column is equipped with a support foot, and a third screw is fixedly connected to the support foot. The third screw is threaded to the end of the first support column away from the second support column.

3. The rock deformation monitoring device for roadway entry as described in claim 2, characterized in that, A third groove matching the indicator post is provided on the opposite groove wall of the second groove, and the indicator post is slidably connected in the third groove.

4. The rock deformation monitoring device for roadway retention according to claim 3, characterized in that, A fourth fixing plate is fixedly connected to the indicator column, and a pair of fixing blocks are fixedly connected to the fourth fixing plate. A sixth groove is provided on the fixing block, and a slider is slidably connected in the sixth groove. A second screw is fixedly connected to the slider, and a rotating column is provided on the pair of second screws. A second internal thread matching the second screw is provided on the rotating column.

5. The rock deformation monitoring device for roadway entry as described in claim 4, characterized in that, The threads of the pair of second screws are turned in opposite directions.

6. The rock deformation monitoring device for roadway retention according to claim 4, characterized in that, A rubber layer is bonded to the slider.

7. The rock deformation monitoring device for roadway entry as described in claim 2, characterized in that, A connecting column is fixedly connected to the second support column, and a fourth groove matching the connecting column is opened on the first support column. The connecting column passes through the fourth groove, and an alarm component is installed on the first support column.

8. The rock deformation monitoring device for roadway retention according to claim 7, characterized in that, The alarm assembly includes a first fixing plate, which is fixedly connected to a first support column. A battery is installed on the first fixing plate, and an alarm is installed on the battery. A pair of second fixing plates are fixedly connected to the first fixing plate, and a third fixing plate is installed on the pair of second fixing plates. A switch is installed on the third fixing plate, and the switch is matched with the battery.

9. The rock deformation monitoring device for roadway retention according to claim 8, characterized in that, The second fixing plate has a fifth groove, and the third fixing plate is fixedly connected with a first screw that matches the fifth groove. The third fixing plate is slidably connected between a pair of second fixing plates through the first screw.

10. A rock deformation monitoring device for roadway entry as described in claim 9, characterized in that, The first screw passes through the fifth groove, and a locking cap is threaded onto the first screw.

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