Rock stratum vertical deformation measuring device

Abstract

The utility model relates to a rock stratum vertical deformation measuring device, and belongs to the field of goaf fissure zone development and rock stratum vertical displacement measurement. Comprising an outer sleeve steel pipe, an inner sleeve steel pipe and a measuring device, and the measuring device is installed in the inner sleeve steel pipe; the measuring device is composed of a measuring screw, a sliding scale and a spring. By means of the measuring device composed of the measuring screw, the sliding scale and the spring, tiny deformation of a rock stratum can be accurately captured, and the measuring accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the field of geotechnical vertical deformation monitoring in geotechnical engineering, and particularly to a device for measuring the vertical deformation of rock strata. Background Art

[0002] During the coal mining process, the deformation and fracture development of the overlying rock strata are inevitable, which will lead to the redistribution of the original in-situ stress. This stress redistribution not only provides more seepage channels for the infiltration of groundwater, but also the deformation of the rock strata and the development of fractures may cause surface deformation and even collapse. Therefore, monitoring and grasping the deformation status and its development trend of underground rock strata are crucial for understanding key issues such as groundwater flow, surrounding rock stability, and surface settlement. Obtaining this information is the basis for implementing green and safe coal mining strategies and is also a necessary means to prevent geological disasters and protect the ecological environment.

[0003] In response to this need, the utility model proposes a device for measuring the vertical deformation of rock strata, which can effectively and accurately measure the deformation of the rock strata, thereby providing reliable data support for the evaluation of rock stratum stability and the analysis of groundwater flow during the coal mining process. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a device for measuring the vertical deformation of rock strata to help accurately measure the deformation of the rock strata.

[0005] A device for measuring the vertical deformation of rock strata provided by the utility model adopts the following technical solutions:

[0006] A device for measuring the vertical deformation of rock strata includes:

[0007] An outer steel pipe, the outer steel pipe is a non-fully closed structure, and an opening area is provided on its outer side;

[0008] An inner steel pipe, the inner steel pipe is also a non-fully closed structure, and an opening area is also provided on its outer side. The inner steel pipe can be inserted into the inside of the outer steel pipe, and the opening areas of the two correspond to each other;

[0009] A measuring device, the measuring device is installed inside the inner steel pipe; the measuring device is composed of a measuring screw, a sliding scale, and a spring; where:

[0010] The measuring screw is installed inside the inner steel pipe;

[0011] The arrow of the sliding scale is located outside the opening area of the inner steel pipe and is clamped on the outer wall of the inner steel pipe through a first gasket and a second gasket;

[0012] A through hole is provided at the tail of the sliding scale; a number of stepped teeth moving downward in the moving direction are evenly provided on the measuring screw; the tail of the sliding scale is matched with the stepped teeth through the through hole;

[0013] One end of the spring is connected to the inner wall of the inner sleeve steel pipe, and the other end is connected to the measuring screw.

[0014] Further, when the arrow part of the sliding scale is clamped on the outer wall of the inner sleeve steel pipe through the first gasket and the second gasket, the spring is in a compressed state.

[0015] Further, when the arrow part of the sliding scale is clamped on the outer wall of the inner sleeve steel pipe through the first gasket and the second gasket, the measuring screw is located at the central position of the inner sleeve steel pipe.

[0016] Further, the outer sleeve steel pipe, the inner sleeve steel pipe and the measuring screw have the same length.

[0017] Further, the diameter of the widest area of the arrow of the sliding scale is smaller than the width of the upper opening area of the inner sleeve steel pipe; the diameter of the spring is larger than the width of the upper opening area of the inner sleeve steel pipe.

[0018] Further, a rubber buckle is installed on the bottom side of the tail of the sliding scale; the rubber buckle is connected to the measuring screw.

[0019] Further, an internal threaded hole is provided at the upper end of the measuring screw, and a protruding screw with an external thread is provided at the lower end.

[0020] Further, operable gasket removal steel ropes are respectively connected to the first gasket and the second gasket.

[0021] In summary, the utility model includes the following beneficial technical effects:

[0022] 1. The device adopts a non-fully closed outer sleeve steel pipe and inner sleeve steel pipe, which is convenient for installing and adjusting the measuring device.

[0023] 2. Through the combination of the measuring screw, the sliding scale and the spring, the tiny vertical deformation of the rock stratum can be accurately measured.

[0024] 3. The design of the compressed state of the spring and the rubber buckle ensures the stability and safety of the device during the measurement process.

[0025] 4. The setting of the gasket removal steel rope enables the remote operation of removing the gasket, improving the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the outer sleeve steel pipe of the utility model;

[0027] Figure 2It is a sectional view of the inner steel pipe and the measuring device;

[0028] Figure 3 It is a top view of the inner steel pipe and the measuring device.

[0029] Explanation of reference numerals: 1. Outer steel pipe; 2. Inner steel pipe; 3. Spring; 4. Measuring screw; 5. Sliding scale; 6. First gasket; 7. Second gasket; 8. Gasket withdrawal steel wire; 9. Rubber buckle. Detailed implementation manners

[0030] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0031] As Figures 1 to 3 shown, the rock stratum vertical deformation measuring device is composed of an outer steel pipe 1, an inner steel pipe 2, a spring 3, a measuring screw 4, a sliding scale 5, a first gasket 6, a second gasket 7, a gasket withdrawal steel wire 8 and a rubber buckle 9.

[0032] As Figures 1 to 3 shown in a specific embodiment of the rock stratum vertical deformation measuring device, the outer steel pipe 1 is not a completely closed steel pipe, and there is an opening area on the outer side of the outer steel pipe 1. The inner steel pipe 2 also has an opening area similar to the outer steel pipe 1. At the same time, the diameter of the inner steel pipe 2 is slightly smaller than that of the outer steel pipe 1, and the inner steel pipe 2 can be placed inside the outer steel pipe 1. The opening areas of the outer steel pipe 1 and the inner steel pipe 2 correspond to each other;

[0033] Specifically, the use of the non-completely closed outer steel pipe 1 and inner steel pipe 2 facilitates the installation and adjustment of the measuring device.

[0034] Specifically, as Figure 2 shown, the measuring device is installed inside the inner steel pipe 2; the measuring device is composed of a measuring screw 4, a sliding scale 5 and a spring 3; the measuring screw 4 is installed inside the inner steel pipe 2; the arrow of the sliding scale 5 is located outside the opening area of the inner steel pipe 2 and is clamped on the outer wall of the inner steel pipe 2 through the first gasket 6 and the second gasket 7; a through hole is provided at the tail of the sliding scale 5; a number of stepped teeth moving downward are evenly provided on the measuring screw 4, and the tail of the sliding scale 5 is clamped with the stepped teeth through the through hole. The stepped teeth make the sliding scale 5 can only move downward and cannot move upward. One end of the spring 3 is connected to the inner wall of the inner steel pipe 2, and the other end is connected to the measuring screw 4.

[0035] Specifically, as Figure 3 shown, when the arrow of the sliding scale 5 is clamped on the outer wall of the inner steel pipe 2 through the first gasket 6 and the second gasket 7, the spring 3 is in a compressed state, and the measuring screw 4 is located at the center of the inner steel pipe 2.

[0036] Specifically, the outer steel pipe 1, the inner steel pipe 2 and the measuring screw 4 have the same length, ensuring that the number of the outer steel pipe 1, the inner steel pipe 2 and the measuring screw 4 used in the drill hole is the same.

[0037] Specifically, the diameter of the widest area of the arrow of the sliding scale 5 is smaller than the width of the opening area on the inner steel pipe 2; the diameter of the spring 3 is larger than the width of the opening area on the inner steel pipe 2.

[0038] In other preferred embodiments, a rubber buckle 9 is installed on the bottom side of the tail of the sliding scale 5; the rubber buckle 9 is connected to the measuring screw 4.

[0039] Specifically, the rubber buckle 9 can prevent the sliding scale 5 from moving downward randomly. A certain external force needs to be applied to make the sliding scale 5 move downward, and the self-weight of the sliding scale 5 cannot make it move downward along the measuring screw 4. At the same time, the measuring screw 4 can rotate within the sliding scale 5.

[0040] In other preferred embodiments, the upper end of the measuring screw 4 is provided with an internal thread hole, and the lower end is provided with a protruding screw with an external thread.

[0041] Specifically, the protruding screw is adapted to the internal thread hole, facilitating the installation and fixation between the upper and lower measuring screws 4.

[0042] In other preferred embodiments, a gasket removal steel rope 9 is connected to both the first gasket 6 and the second gasket 7, enabling remote operation of the removal of the gasket and improving the convenience of operation.

[0043] The specific application method of the present utility model:

[0044] S1. Drill a hole on the surface of the goaf until the goaf area. The diameter of the hole matches the maximum diameter of the outer steel pipe 1.

[0045] S2. Then insert the outer steel pipe 1 into the surface drill hole in sequence. The first section of the outer steel pipe 1 directly contacts the bottom of the goaf. The upper and lower ends of each section of the outer steel pipe 1 are in close contact in sequence until the outer steel pipe 1 exposes the surface position, and record the number of the outer steel pipes 1 used.

[0046] S3. Assemble the measuring device on the inner steel pipe 2, make the spring 3 in a compressed state, adjust the sliding scale 5 and the rubber buckle 9 so that the sliding scale 5 is located in the middle position of the inner steel pipe 1, and at the same time the sliding scale 5 is also located in the middle position of the measuring screw 4.

[0047] S4. Since the lengths of the outer steel pipe 1 and the inner steel pipe 2 are the same, the number of inner steel pipes 2 that can be placed in the drilled holes of the bottom plate is the same as the number of outer steel pipes 1. After adjusting the position of the sliding scale 5, number the sliding scale 5, the measuring screw 4, and the rubber buckle 9. According to the number of inner steel pipes 2 placed, they are numbered 1, 2, 3,.... in sequence. The serial numbers of one set of the sliding scale 5, the screw 4, and the rubber buckle 9 are the same;

[0048] S5. Place the inner steel pipes 2 into the inner part of the outer steel pipes 1 in sequence according to the serial numbers. The upper and lower ends of the inner steel pipes 2 are connected in sequence. The measuring screw 4 is connected to the protruding screw through the internal thread hole. During the installation process, it is necessary to pay attention to aligning the position of the sliding scale 5 with the vacant area of the outer steel pipe 1;

[0049] S6. When the inner steel pipes 2 and the screws 4 are all connected in sequence, due to the action of ground stress on the rock and soil, the rock and soil squeeze into the vacant area of the outer steel pipe 1. At this time, the arrow area of the sliding scale 5 is inserted into the rock and soil mass. When the rock and soil mass moves downward, the sliding scale 5 will move downward;

[0050] S7. After the measurement is completed, pull the gasket removal rope 8 forcefully. The first gasket 6 and the second gasket 7 fall off. Due to the acting force of the spring 3 restoring deformation, the measuring screw 4 is moved inward, and the sliding scale 5 retracts into the inner steel pipe 2;

[0051] S8. Take out the sequentially connected measuring device. According to the serial numbers of each measuring screw 4 and the serial numbers of the rubber buckles 9 in the sequentially connected measuring screws 4, the corresponding rock formation movement positions can be calculated;

[0052] S9. When the serial number of the measuring screw 4 is i, find the rubber buckle 9 with the corresponding serial number i. Then, measure the length from the middle position of the screw with the serial number i to the position of the rubber buckle 9 with the serial number i, which is the moving distance of the sliding scale 5 with the serial number i. The formation depth corresponding to the measuring screw 4 with the serial number i is (i - 1)×measuring screw length + measuring screw length / 2.

[0053] Specifically, by using the above method, the formation depth of (i - 1)×measuring screw length + measuring screw length / 2 and its corresponding vertical movement distance of the rock formation can be obtained.

[0054] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited hereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A device for measuring the vertical deformation of a rock formation, characterized in that, Comprising: An outer steel pipe, the outer steel pipe being a non-fully closed structure with an opening area on its outer side; An inner steel pipe, the inner steel pipe also being a non-fully closed structure with an opening area on its outer side, the inner steel pipe being insertable inside the outer steel pipe, and the opening areas of both corresponding to each other; A measuring device, the measuring device being installed inside the inner steel pipe; the measuring device is composed of a measuring screw, a sliding scale and a spring; wherein: The measuring screw is installed inside the inner steel pipe; The arrow of the sliding scale is located outside the opening area of the inner steel pipe and is clamped to the outer wall of the inner steel pipe through a first gasket and a second gasket; A through hole is provided at the tail of the sliding scale; a number of stepped teeth with a downward moving direction are evenly provided on the measuring screw; the tail of the sliding scale is matched with the stepped teeth through the through hole; One end of the spring is connected to the inner wall of the inner steel pipe, and the other end is connected to the measuring screw.

2. The vertical deformation measuring device for rock strata according to claim 1, wherein When the arrow part of the sliding scale is clamped to the outer wall of the inner steel pipe through the first gasket and the second gasket, the spring is in a compressed state.

3. The vertical deformation measuring device for rock strata according to claim 2, wherein When the arrow part of the sliding scale is clamped to the outer wall of the inner steel pipe through the first gasket and the second gasket, the measuring screw is located at the central position of the inner steel pipe.

4. A device for measuring the vertical deformation of a rock formation according to claim 1, characterized in that, The outer steel pipe, the inner steel pipe and the measuring screw have the same length.

5. The vertical deformation measuring device for rock strata according to claim 1, characterized in that, The diameter of the widest area of the arrow of the sliding scale is smaller than the width of the opening area on the inner steel pipe; the diameter of the spring is larger than the width of the opening area on the inner steel pipe.

6. The vertical deformation measuring device for rock stratum according to claim 1, wherein, A rubber buckle is installed on the bottom side of the tail of the sliding scale; the rubber buckle is connected to the measuring screw.

7. The vertical deformation measuring device for rock strata according to claim 1, wherein, An internal threaded hole is provided at the upper end of the measuring screw, and a protruding screw with an external thread is provided at the lower end.

8. A device for measuring the vertical deformation of a rock formation according to claim 1, characterized in that, Operable gasket withdrawal steel ropes are respectively connected to the first gasket and the second gasket.

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