A goaf area monitoring device

Abstract

The present invention relates to the technical field of goaf area subsidence monitoring, and discloses a goaf area monitoring device, including a plurality of measuring sleeves, wherein the bottom of the outermost measuring sleeve is closed, the outermost measuring sleeve is provided with a sealing sleeve, an annular chute is provided on the measuring sleeve and the sealing sleeve respectively, a sealing piston is provided in the annular chute, the sealing piston, the measuring sleeve, and the sealing sleeve are enclosed to form a measuring cavity, the measuring cavity is filled with measuring gas, the top of the innermost measuring sleeve is closed, a telescopic partition assembly is provided in the innermost measuring sleeve, the telescopic partition assembly divides the inside of the measuring sleeve into connecting cavities, each connecting cavity is connected to a measuring cavity through a connecting pipe, and a monitoring airbag is connected to the top of the connecting cavity through a hose. The present invention has a simple structure, strong practicality, and low cost, can realize subsidence monitoring of different soil layers, and is suitable for large-area subsidence monitoring in mineral goaf areas.

Description

Technical Field

[0001] The invention relates to the technical field of goaf area subsidence monitoring, and in particular to a goaf area monitoring device. Background Art

[0002] The large-scale development and utilization of mineral resources has brought huge social and economic benefits to mankind, but it has also caused a series of environmental problems and mining damage to human production and life. The subsidence of the goaf area is caused by the formation of the goaf area after mineral mining. The upper rock layer undergoes deformation such as falling, breaking, squeezing, bending, and moving under the action of gravity, and spreads to the ground. It is one of the main man-made geological disasters. The subsidence monitoring of the goaf area can provide early warning and forecast of the ground pressure disaster in the mine, which is conducive to mining enterprises to take countermeasures in advance to avoid catastrophic accidents. Most of the existing goaf area monitoring uses total stations or GPS and other equipment, which are costly and cumbersome to install and use. They are not suitable for large-scale subsidence monitoring of mineral goaf areas. Most of the other monitoring devices can only monitor the total settlement of the ground, and cannot monitor the settlement of different soil layers. It is difficult to provide corresponding data basis for subsidence disaster prediction and loss assessment, and the practicality is not strong. Therefore, there is an urgent need for a goaf area monitoring device with simple structure, low cost and the ability to monitor the settlement of different soil layers. Summary of the invention

[0003] In view of the technical problems existing in the prior art, the present invention provides a goaf area monitoring device.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a goaf area monitoring device, comprising a plurality of coaxially arranged measuring sleeves whose heights decrease from the inside to the outside, wherein the outer diameter of each measuring sleeve is consistent with the inner diameter of the outer measuring sleeve adjacent thereto, wherein the bottom of the outermost measuring sleeve is closed, and a sealing sleeve is provided in the outermost measuring sleeve corresponding to each measuring sleeve therein, wherein the outer diameter of the sealing sleeve is consistent with the inner diameter of the measuring sleeve located outside thereof, and an axially extending annular grooves are provided on the measuring sleeves and the sealing sleeves, wherein the inner diameter of the annular grooves is correspondingly provided with an annular groove. The dynamic fit is provided with a sealing piston, which is fixed on the measuring sleeve located between the measuring sleeve and the sealing sleeve. The sealing piston, two adjacent measuring sleeves and their corresponding sealing sleeves enclose a measuring cavity, which is filled with measuring gas. The top of the innermost measuring sleeve is closed, and a plurality of telescopic partition assemblies are provided in the innermost measuring sleeve. The telescopic partition assemblies divide the interior of the measuring sleeve into connecting cavities with the same number of measuring cavities. Each connecting cavity is connected to a measuring cavity through a connecting pipe, and a monitoring airbag is connected to the top of the connecting cavity through a hose.

[0005] Preferably, the telescopic partition assembly includes an outer annular partition and an inner annular partition. The outer annular partition is fixed to the bottom of the outermost measuring sleeve. The outer annular partitions of several telescopic partition assemblies are distributed in sequence from the outside to the inside. The outer annular partition is provided with an annular slot extending axially and having an opening at the top. The top of the inner annular partition is fixed to the top of the innermost measuring sleeve, and the bottom is inserted into the annular slot of the outer annular partition. The inner annular partition and the annular slot are axially sliding and sealed, and the bottom of the inner annular partition is connected to the bottom of the annular slot by an elastic mechanism.

[0006] Preferably, the elastic mechanism includes a connecting rod and a spring, a connecting groove is provided on the inner annular partition, the bottom of the connecting rod is fixed on the inner wall of the bottom of the annular slot, the top is inserted into the connecting groove and slides with the connecting groove, the spring is sleeved outside the connecting rod and its two ends are respectively connected to the bottom of the connecting rod and the inner wall of the bottom of the annular slot.

[0007] Preferably, an annular sealing groove is provided on the inner annular partition plate, and an annular sealing gasket is provided in the annular sealing groove.

[0008] The invention has the advantages of simple structure, strong practicability and low cost, can realize subsidence monitoring of different soil layers, and is suitable for large-area subsidence monitoring in mineral goaf areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is an axial cross-sectional view of Example 1.

[0010] Figure 2 yes Figure 1 Enlarged schematic diagram at point A in the middle.

[0011] Figure 3 yes Figure 1 Enlarged schematic diagram of point B in the middle.

[0012] In the figure: 1 measuring sleeve, 2 sealing sleeve, 3 annular groove, 4 sealing piston, 5 measuring chamber, 6 connecting chamber, 7 connecting pipe, 8 hose, 9 monitoring airbag, 10 outer annular partition, 11 inner annular partition, 12 annular slot, 13 connecting rod, 14 spring, 15 connecting groove, 16 annular sealing gasket. DETAILED DESCRIPTION

[0013] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0014] Example 1

[0015] See also Figure 1-3A goaf area monitoring device comprises four coaxially arranged measuring sleeves 1 whose heights decrease from the inside to the outside, wherein the outer diameter of each measuring sleeve 1 is consistent with the inner diameter of the outer measuring sleeve 1 adjacent thereto, wherein the bottom of the outermost measuring sleeve 1 is closed, and a sealing sleeve 2 is provided in the outermost measuring sleeve 1 corresponding to each measuring sleeve 1 therein, wherein the outer diameter of the sealing sleeve 2 is consistent with the inner diameter of the measuring sleeve 1 located outside thereof, and an axially extending annular groove 3 is provided on the measuring sleeve 1 and the sealing sleeve 2, and a sealing piston is provided in the annular groove 3 for sliding cooperation. 4, the sealing piston 4 is fixed on the measuring sleeve 1 located between the measuring sleeve 1 and the sealing sleeve 2, the sealing piston 4, the two adjacent measuring sleeves 1 and the corresponding sealing sleeves 2 enclose a measuring chamber 5, the measuring chamber 5 is filled with measuring gas, the top of the innermost measuring sleeve 1 is closed, and two telescopic partition assemblies are arranged in the innermost measuring sleeve 1, the telescopic partition assembly divides the inside of the measuring sleeve 1 into three connecting chambers 6, each connecting chamber 6 is connected to a measuring chamber 5 through a connecting pipe 7, and the top of the connecting chamber 6 is connected to a monitoring airbag 9 through a hose 8.

[0016] The telescopic partition assembly includes an outer annular partition 10 and an inner annular partition 11. The outer annular partition 10 is fixed to the bottom of the outermost measuring sleeve 1. The outer annular partitions 10 of the two telescopic partition assemblies are distributed in sequence from the outside to the inside. The outer annular partition 10 is provided with an annular slot 12 which extends axially and has an opening at the top. The top of the inner annular partition 11 is fixed to the top of the innermost measuring sleeve 1, and the bottom is inserted into the annular slot 12 of the outer annular partition 10. The inner annular partition 11 and the annular slot 12 are axially slidingly sealed, and the bottom of the inner annular partition 11 is connected to the bottom of the annular slot 12 by an elastic mechanism.

[0017] The elastic mechanism includes a connecting rod 13 and a spring 14. A connecting groove 15 is provided on the inner annular partition 11. The bottom of the connecting rod 13 is fixed to the inner wall of the bottom of the annular slot 12, and the top is inserted into the connecting groove 15 and slidably cooperates with the connecting groove 15. The spring 14 is sleeved outside the connecting rod 13 and its two ends are respectively connected to the bottom of the connecting rod 13 and the inner wall of the bottom of the annular slot 12.

[0018] An annular sealing groove is provided on the inner annular partition plate 11 , and an annular sealing gasket 16 is provided in the annular sealing groove.

[0019] In this embodiment, the heights of the three sealing sleeves 2 increase from the outside to the inside, the sealing piston 4 is annular, and the four measuring sleeves 1 and the three sealing sleeves 2 form three measuring chambers 5, which can monitor the settlement of three different soil layers.

[0020] When in use, the outermost measuring sleeve 1 or the innermost measuring sleeve 1 is first fixed on the measuring reference point (can be fixed on the bedrock mark), and then the remaining three measuring sleeves 1 are buried in three different soil layers to be measured. At this time, the measuring cavity 5 is filled with measuring gas, and the measuring gas produces upward pressure on the measuring sleeve 1 corresponding to the measuring cavity 5, so that the measuring sleeve 1 is in a force balance state, and the monitoring airbag 9 leaks out of the ground for easy observation. When the soil layer sinks, the soil layer produces downward pressure on the measuring sleeve 1 in the layer, the measuring sleeve 1 moves downward, the volume of the measuring cavity 5 and the connecting cavity 6 changes, and the shape of the monitoring airbag 9 connected to the connecting cavity 6 changes. The ground subsidence is monitored by monitoring the changes of the monitoring airbag 9 above the ground. In actual use, a pressure sensor can be installed in the monitoring airbag 9, and the pressure value change data in the monitoring airbag 9 is obtained through the pressure sensor, and the specific data of the soil layer subsidence is calculated by a professional computer. The staff can judge the direction and trend of the subsidence according to the shape changes and pressure value information of each monitoring airbag 9.

[0021] The present invention is provided with a telescopic partition assembly. When the soil layer sinks and the total height of the four measuring sleeves 1 changes, the inner annular partition 11 can move axially to adapt to the change in the total height. The connection rod 13 and the connection groove 15 can guide the axial movement of the inner annular partition 11, making it move more smoothly.

[0022] The setting of the sealing piston 4 can guide the axial movement of the measuring sleeve 1 on the one hand, and can seal each measuring cavity 5 on the other hand, and prevent external soil from entering the measuring cavity 5, thereby ensuring the accuracy of the measurement; the setting of the annular sealing gasket 16 can seal the connecting cavity 6, so that the connecting cavities 6 do not leak gas from each other, further ensuring the accuracy of the measurement.

[0023] The invention has the advantages of simple structure, strong practicability and low cost, can realize subsidence monitoring of different soil layers, and is suitable for large-area subsidence monitoring in mineral goaf areas.

[0024] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A goaf area monitoring device, characterized in that: The invention comprises a plurality of coaxially arranged measuring sleeves whose height decreases from the inside to the outside, the outer diameter of each measuring sleeve is consistent with the inner diameter of the outer measuring sleeve adjacent thereto, wherein the bottom of the outermost measuring sleeve is closed, and a sealing sleeve is provided in the outermost measuring sleeve corresponding to each measuring sleeve therein, the outer diameter of the sealing sleeve is consistent with the inner diameter of the measuring sleeve located outside thereof, and an axially extending annular groove is provided on the measuring sleeve and the sealing sleeve respectively, and a sealing piston is provided in the annular groove for sliding cooperation, and the sealing piston is fixed on the measuring sleeve located between the measuring sleeve and the sealing sleeve, and the sealing piston, two adjacent measuring sleeves and the corresponding sealing sleeve are enclosed to form a measuring chamber, and the measuring chamber is filled with measuring gas, the top of the innermost measuring sleeve is closed, and a plurality of telescopic baffle assemblies are provided in the innermost measuring sleeve, and the telescopic baffle assemblies divide the interior of the measuring sleeve into connecting cavities consistent with the number of measuring cavities, and each connecting cavity is connected to a measuring cavity through a connecting pipe, and a monitoring airbag is connected to the top of the connecting cavity through a hose; A pressure sensor is installed in the monitoring airbag, and the pressure value change data in the monitoring airbag is obtained through the pressure sensor. The specific data of soil subsidence is calculated by a professional computer. The direction and trend of subsidence can be determined based on the shape changes and pressure value information of each monitoring airbag.

2. A goaf area monitoring device according to claim 1, characterized in that: The telescopic partition assembly includes an outer annular partition and an inner annular partition. The outer annular partition is fixed to the bottom of the outermost measuring sleeve. The outer annular partitions of the telescopic partition assembly are distributed in sequence from the outside to the inside. The outer annular partition is provided with an annular slot extending axially and having an opening at the top. The top of the inner annular partition is fixed to the top of the innermost measuring sleeve, and the bottom is inserted into the annular slot of the outer annular partition. The inner annular partition and the annular slot are axially sliding and sealed, and the bottom of the inner annular partition is connected to the bottom of the annular slot by an elastic mechanism.

3. A goaf area monitoring device according to claim 2, characterized in that: The elastic mechanism includes a connecting rod and a spring. A connecting groove is provided on the inner annular partition plate. The bottom of the connecting rod is fixed on the inner wall of the bottom of the annular slot, and the top is inserted into the connecting groove and slidably cooperates with the connecting groove. The spring is sleeved outside the connecting rod and its two ends are respectively connected to the bottom of the connecting rod and the inner wall of the bottom of the annular slot.

4. A goaf area monitoring device according to claim 2, characterized in that: An annular sealing groove is arranged on the inner annular partition plate, and an annular sealing gasket is arranged in the annular sealing groove.

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