Underground filling monitoring signal pipe and monitoring method

Abstract

The present invention provides an underground filling monitoring signal pipe and a monitoring method, belonging to the technical field of blind area filling in mines. It includes a transparent hollow pipe body, and a plurality of monitoring holes with equal apertures are arranged on the radial end surface of the hollow pipe body; wherein, along the axial direction of the hollow pipe body, the distances between adjacent two monitoring holes are equal; a filtering device is arranged on the monitoring holes, and the filtering device is used to filter particulate impurities in the water above the filling slurry and prevent the filling slurry from flowing into the hollow pipe body. The water above the filling slurry flows into the hollow pipe body through the monitoring holes after being filtered by the filtering device. The present invention can effectively realize real-time monitoring of the filling height during underground blind area filling according to the water overflow amount and water overflow times of the underground filling monitoring signal pipe, accurately control the roof contact rate, reduce the empty roof area and slurry leakage amount, and reduce the safety risk and cost investment.

Description

Technical Field

[0001] The present invention relates to the technical field of mine blind area filling, and particularly relates to an underground filling monitoring signal pipe and a monitoring method thereof. Background Art

[0002] The underground filling monitoring signal pipe is an important means to improve the filling roof contact rate during underground blind area filling. In the traditional underground filling process, it is required to lay a feed pipe, an exhaust pipe and a signal pipe. The signal pipe is hung below the exhaust pipe to play a role in warning the roof contact. However, in the cases of the stope of the upward horizontal drift filling mining method and the caving area, etc., the height of the goaf roof is mostly higher than the height of the filling wall, resulting in a filling blind area between the top of the wall and the stope roof. The traditional signal pipeline cannot monitor the filling height in real time, and can only roughly estimate the filling roof contact rate by the overflow of the cemented filling slurry through the signal pipe when approaching the roof contact. It is very difficult for inexperienced filling personnel to accurately grasp the filling height and the roof contact rate, and there are often phenomena such as low filling roof contact rate and excessive leakage of the filling slurry due to too much filling slurry. The inaccurate roof contact causes a large empty roof area, which is extremely likely to cause the appearance of ground pressure disasters and there are great potential safety hazards. The running of the cemented filling slurry causes an increase in cost, and the later work of cleaning the leaking filling body is difficult and consumes a lot of manpower and material resources. Summary of the Invention

[0003] The purpose of the present invention is to provide an underground filling monitoring signal pipe and a monitoring method thereof that can monitor the filling height of the blind area in real time, improve the filling roof contact rate, and avoid the leakage of the filling slurry, so as to solve at least one of the technical problems existing in the above background art.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] On the one hand, the present invention provides an underground filling monitoring signal pipe, including:

[0006] A transparent hollow pipe body, and a plurality of monitoring holes with equal apertures are arranged on the radial end face of the hollow pipe body; wherein, along the axial direction of the hollow pipe body, the distance between two adjacent monitoring holes is equal;

[0007] A filtering device is arranged on the monitoring hole, and the filtering device is used to filter the particulate impurities in the water above the filling slurry and prevent the filling slurry from flowing into the hollow pipe body. The water above the filling slurry flows into the hollow pipe body through the monitoring hole after being filtered by the filtering device.

[0008] Preferably, the filtering device is a geotextile wrapped outside the monitoring hole.

[0009] Preferably, the geotextile is clamped on the hollow pipe body by a clamping hoop.

[0010] Preferably, a support framework is provided on the passage of the monitoring hole, and the support framework is used to support the geotextile.

[0011] Preferably, the support framework is a stainless steel mesh, and the edge of the stainless steel mesh is embedded in the hole wall of the monitoring hole.

[0012] Preferably, the hollow tube body is made of plastic.

[0013] Preferably, the centers of the monitoring holes with equal apertures are located on the same straight line on the radial end face of the hollow tube body, forming a monitoring hole group.

[0014] Preferably, multiple groups of monitoring hole groups are provided on the hollow tube body. The number of monitoring holes in each group of monitoring hole groups is equal, and the positions of the outermost monitoring holes in each group of monitoring hole groups correspond to each other in the axial direction of the hollow tube body.

[0015] Preferably, each group of monitoring hole groups includes 3 of the monitoring holes.

[0016] In a second aspect, the present invention provides a method for monitoring underground filling using the underground filling monitoring signal tube as described above. The monitoring signal tube is hung at the highest point of the roof of the underground goaf. The monitoring holes on the monitoring signal tube are, in order from bottom to top, the first monitoring hole, the second monitoring hole,..., the nth monitoring hole; when the water volume in the hollow tube body increases for the first time, the water level above the filling slurry reaches the lowermost first monitoring hole; when the water volume in the hollow tube body no longer increases and shows a first decrease or even disappears, the height of the filling slurry exceeds the first monitoring hole and is between the first monitoring hole and the second monitoring hole;

[0017] When the water volume in the hollow tube body increases for the second time, the water level above the filling slurry reaches the second monitoring hole; when the water volume in the hollow tube body no longer increases and shows a second decrease or even disappears, the height of the filling slurry exceeds the second monitoring hole and is between the second monitoring hole and the third monitoring hole;

[0018] When the water volume in the hollow tube body increases for the third time, the water level above the filling slurry reaches the third monitoring hole; when the water volume in the hollow tube body no longer increases and shows a third decrease or even disappears, the height of the filling slurry exceeds the third monitoring hole and is between the third monitoring hole and the fourth monitoring hole;

[0019] And so on. When the water volume in the hollow tube body increases for the nth time, the water level above the filling slurry reaches the nth monitoring hole; when the water volume in the hollow tube body no longer increases and shows the nth decrease or even disappears, the height of the filling slurry exceeds the nth monitoring hole.

[0020] Advantages of the present invention: According to the water overflow volume and the number of water overflow times of the underground filling monitoring signal pipe, it can effectively achieve real-time monitoring of the filling height during underground blind area filling, accurately control the roof contact rate, reduce the empty roof area and the slurry leakage amount, and reduce the safety risk and cost investment.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and these will become apparent from the following description or can be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 It is a structural diagram of the underground filling monitoring signal pipe according to the embodiment of the present invention.

[0024] Figure 2 It is a structural diagram of the underground filling monitoring signal pipe according to the embodiment of the present invention.

[0025] Wherein: 1 - hollow pipe body; 2 - monitoring hole; 3 - geotextile; 4 - clamping hoop; 5 - support skeleton. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described through the drawings are exemplary and are only used to explain the present invention, and cannot be construed as a limitation to the present invention.

[0027] Those skilled in the art of the present technology can understand that unless otherwise defined, all terms (including technical terms and scientific terms) used here have the same meaning as the general understanding of those of ordinary skill in the art in the field to which the present invention belongs.

[0028] It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless defined as here.

[0029] Those skilled in the art can understand that, unless specifically stated otherwise, the singular forms "a", "an", "the", and "said" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the specification of the present invention means the presence of the described features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, and / or their groups.

[0030] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0031] In the description of this specification, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present technology and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present technology.

[0032] Unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", and "set" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in the present technology can be understood according to specific circumstances.

[0033] For the convenience of understanding the present invention, the following further explains the present invention with specific examples in conjunction with the drawings, and the specific examples do not constitute a limitation to the embodiments of the present invention.

[0034] Those skilled in the art should understand that the drawings are only schematic diagrams of the embodiments, and the components in the drawings are not necessarily essential for implementing the present invention.

[0035] Embodiment 1

[0036] As Figure 1 shown, Embodiment 1 of the present invention provides a downhole filling monitoring signal pipe, and the downhole filling monitoring signal pipe includes:

[0037] A transparent hollow tube body 1, on the radial end face of the hollow tube body 1, there are provided a plurality of monitoring holes 2 with equal apertures; wherein, along the axial direction of the hollow tube body 1, the distances between two adjacent monitoring holes 2 are equal; on the monitoring hole 2, there is provided a filtering device, and the filtering device is used for filtering particulate impurities in the water above the filling slurry and preventing the filling slurry from flowing into the hollow tube body 1, and the water above the filling slurry flows into the hollow tube body 1 through the monitoring hole 2 after being filtered by the filtering device.

[0038] An observer can observe the height of the water level in the hollow tube body 1 through the transparent hollow tube body 1.

[0039] In the first embodiment, the filtering device is a geotextile 3 wrapped outside the monitoring hole 2.

[0040] In the first embodiment, the geotextile 3 is clamped on the hollow tube body 1 through a clamping hoop 4.

[0041] On the pore passage of the monitoring hole 2, there is provided a support skeleton 5, and the support skeleton 5 is used for supporting the geotextile 3.

[0042] In the first embodiment, the support skeleton 5 is a stainless steel mesh, and the edge of the stainless steel mesh is embedded in the pore wall of the monitoring hole 2.

[0043] The hollow tube body 1 is made of plastic.

[0044] In the first embodiment, when using the above-mentioned underground filling monitoring signal tube for underground filling monitoring, the monitoring signal tube is hung at the highest point of the roof of the underground goaf, and the monitoring holes on the monitoring signal tube are the first monitoring hole, the second monitoring hole,..., the nth monitoring hole from bottom to top in sequence.

[0045] When the water volume in the hollow tube body increases for the first time, the water level above the filling slurry reaches the lowermost first monitoring hole; when the water volume in the hollow tube body no longer increases and shows the first decrease or even disappears, the height of the filling slurry exceeds the first monitoring hole and is between the first monitoring hole and the second monitoring hole;

[0046] When the water volume in the hollow tube body increases for the second time, the water level above the filling slurry reaches the second monitoring hole; when the water volume in the hollow tube body no longer increases and shows the second decrease or even disappears, the height of the filling slurry exceeds the second monitoring hole and is between the second monitoring hole and the third monitoring hole;

[0047] When the water volume in the hollow tube body increases for the third time, the water level above the filling slurry reaches the third monitoring hole; when the water volume in the hollow tube body no longer increases and shows the third decrease or even disappears, the height of the filling slurry exceeds the third monitoring hole and is between the third monitoring hole and the fourth monitoring hole;

[0048] And so on. When the water volume in the hollow tube increases for the nth time, the water level above the filling slurry reaches the nth monitoring hole; when the water volume in the hollow tube no longer increases and decreases or even disappears for the nth time, the height of the filling slurry exceeds the nth monitoring hole.

[0049] Embodiment 2

[0050] As Figure 2 shown, Embodiment 2 of the present invention provides a downhole filling monitoring signal tube, which includes:

[0051] A transparent hollow tube body 1, and a plurality of monitoring holes 2 with equal apertures are provided on the radial end surface of the hollow tube body 1; wherein, along the axial direction of the hollow tube body 1, the distance between two adjacent monitoring holes 2 is equal;

[0052] A filtering device is provided on the monitoring hole 2, and the filtering device is used to filter particulate impurities in the water above the filling slurry and prevent the filling slurry from flowing into the hollow tube body 1. The water above the filling slurry flows into the hollow tube body 1 through the monitoring hole 2 after being filtered by the filtering device.

[0053] The filtering device is a geotextile 3 wrapped outside the monitoring hole 2. The geotextile 3 is clamped on the hollow tube body 1 by a clamping hoop 4. A support skeleton 5 is provided on the pore passage of the monitoring hole 2, and the support skeleton 5 is used to support the geotextile 3. The support skeleton 5 is a stainless steel mesh, and the edge of the stainless steel mesh is embedded in the pore wall of the monitoring hole 2.

[0054] In this Embodiment 2, the hollow tube body 1 is made of plastic.

[0055] In this Embodiment 2, the centers of the plurality of monitoring holes 2 with equal apertures are located on the same straight line on the radial end surface of the hollow tube body 1, forming a monitoring hole group.

[0056] In this Embodiment 2, a plurality of groups of monitoring hole groups are provided on the hollow tube body 1. The number of monitoring holes 2 in each group of monitoring hole groups is equal, and the positions of the outermost monitoring holes 2 in each group of monitoring hole groups correspond to each other in the axial direction of the hollow tube body 1.

[0057] Setting a plurality of groups of monitoring hole groups can ensure that when the water surface above the filling slurry reaches the monitoring hole, the flow rate of water flowing into the hollow tube is large, and the observer can clearly see the change in the water volume inside the hollow tube through the hollow tube body, so as to make the water volume judgment more accurate.

[0058] In the second embodiment, when the underground filling monitoring signal pipe as described above is used for underground filling monitoring, the monitoring signal pipe is hung at the highest point of the roof of the underground goaf. The monitoring holes on the monitoring signal pipe are, from bottom to top, the first monitoring hole, the second monitoring hole,..., the nth monitoring hole. When the water volume in the hollow pipe body increases for the first time, the water level above the filling slurry reaches the lowermost first monitoring hole. When the water volume in the hollow pipe body no longer increases and shows the first decrease or even disappears, the height of the filling slurry exceeds the first monitoring hole and is between the first monitoring hole and the second monitoring hole.

[0059] When the water volume in the hollow pipe body increases for the second time, the water level above the filling slurry reaches the second monitoring hole. When the water volume in the hollow pipe body no longer increases and shows the second decrease or even disappears, the height of the filling slurry exceeds the second monitoring hole and is between the second monitoring hole and the third monitoring hole.

[0060] When the water volume in the hollow pipe body increases for the third time, the water level above the filling slurry reaches the third monitoring hole. When the water volume in the hollow pipe body no longer increases and shows the third decrease or even disappears, the height of the filling slurry exceeds the third monitoring hole and is between the third monitoring hole and the fourth monitoring hole.

[0061] And so on. When the water volume in the hollow pipe body increases for the nth time, the water level above the filling slurry reaches the nth monitoring hole. When the water volume in the hollow pipe body no longer increases and shows the nth decrease or even disappears, the height of the filling slurry exceeds the nth monitoring hole.

[0062] Embodiment 3

[0063] As Figure 2 shown, Embodiment 3 of the present invention provides an underground filling monitoring signal pipe, which includes:

[0064] A transparent hollow pipe body 1, and a plurality of monitoring holes 2 with equal apertures are provided on the radial end face of the hollow pipe body 1. Among them, along the axial direction of the hollow pipe body 1, the distance between two adjacent monitoring holes 2 is equal.

[0065] A filtering device is provided on the monitoring hole 2. The filtering device is used to filter particulate impurities in the water above the filling slurry and prevent the filling slurry from flowing into the hollow pipe body 1. The water above the filling slurry flows into the hollow pipe body 1 through the monitoring hole 2 after being filtered by the filtering device.

[0066] The filtering device is a geotextile 3 wrapped around the outside of the monitoring hole 2. The geotextile 3 is clamped on the hollow tube body 1 by a clamping hoop 4. A support skeleton 5 is provided on the pore passage of the monitoring hole 2, and the support skeleton 5 is used to support the geotextile 3. The support skeleton 5 is a stainless steel mesh, and the edge of the stainless steel mesh is embedded in the pore wall of the monitoring hole 2.

[0067] In this Embodiment 3, the hollow tube body 1 is made of plastic.

[0068] In this Embodiment 3, the centers of the multiple monitoring holes 2 with equal pore diameters are located on the same straight line on the radial end face of the hollow tube body 1, forming a monitoring hole group.

[0069] In this Embodiment 3, two groups of monitoring hole groups are provided on the hollow tube body 1. The number of monitoring holes 2 in each group of monitoring hole groups is equal, and the positions of the outermost monitoring holes 2 in each group of monitoring hole groups correspond to each other in the axial direction of the hollow tube body 1.

[0070] In this Embodiment 3, the two monitoring hole groups are symmetrically arranged on the hollow tube body 1, that is, the distances between two monitoring holes 2 corresponding to each other in the axial direction of the hollow tube body 1 are equal in the circumferential direction of the hollow tube body 1.

[0071] In this Embodiment 3, when using the underground filling monitoring signal tube as described above for underground filling monitoring, the monitoring signal tube is hung at the highest point of the roof of the underground goaf. The monitoring holes on the monitoring signal tube are, from bottom to top, the 1st monitoring hole, the 2nd monitoring hole,..., the nth monitoring hole; when the water volume in the hollow tube body increases for the first time, the water level above the filling slurry reaches the lowermost 1st monitoring hole; when the water volume in the hollow tube body no longer increases and decreases for the first time or even disappears, the height of the filling slurry exceeds the 1st monitoring hole and is between the 1st monitoring hole and the 2nd monitoring hole;

[0072] When the water volume in the hollow tube body increases for the second time, the water level above the filling slurry reaches the 2nd monitoring hole; when the water volume in the hollow tube body no longer increases and decreases for the second time or even disappears, the height of the filling slurry exceeds the 2nd monitoring hole and is between the 2nd monitoring hole and the 3rd monitoring hole;

[0073] When the water volume in the hollow tube body increases for the third time, the water level above the filling slurry reaches the 3rd monitoring hole; when the water volume in the hollow tube body no longer increases and decreases for the third time or even disappears, the height of the filling slurry exceeds the 3rd monitoring hole and is between the 3rd monitoring hole and the 4th monitoring hole;

[0074] And so on. When the water volume in the hollow tube increases for the nth time, the water level above the filling slurry reaches the nth monitoring hole; when the water volume in the hollow tube no longer increases and decreases or even disappears for the nth time, the height of the filling slurry exceeds the nth monitoring hole.

[0075] Example 4

[0076] As Figure 2 shown, Example 4 of the present invention provides a downhole filling monitoring signal tube, which includes:

[0077] A transparent hollow tube body 1, and a plurality of monitoring holes 2 with equal apertures are provided on the radial end surface of the hollow tube body 1; wherein, along the axial direction of the hollow tube body 1, the distance between two adjacent monitoring holes 2 is equal; a filtering device is provided on the monitoring hole 2, and the filtering device is used to filter particulate impurities in the water above the filling slurry and prevent the filling slurry from flowing into the hollow tube body 1, and the water above the filling slurry flows into the hollow tube body 1 through the monitoring hole 2 after being filtered by the filtering device.

[0078] The filtering device is a geotextile 3 wrapped outside the monitoring hole 2. The geotextile 3 is clamped on the hollow tube body 1 by a clamping hoop 4. A support skeleton 5 is provided on the pore channel of the monitoring hole 2, and the support skeleton 5 is used to support the geotextile 3. The support skeleton 5 is a stainless steel mesh, and the edge of the stainless steel mesh is embedded in the pore wall of the monitoring hole 2.

[0079] In this Example 4, the hollow tube body 1 is made of plastic.

[0080] In this Example 4, the centers of the plurality of monitoring holes 2 with equal apertures are located on the same straight line on the radial end surface of the hollow tube body 1, forming a monitoring hole group.

[0081] In this Example 4, two groups of monitoring hole groups are provided on the hollow tube body 1, the number of monitoring holes 2 in each group of monitoring hole groups is equal, and the positions of the outermost monitoring holes 2 in each group of monitoring hole groups correspond to each other in the axial direction of the hollow tube body 1.

[0082] In this Example 4, the two groups of monitoring hole groups are symmetrically arranged on the hollow tube body 1, that is, the distances between two monitoring holes 2 corresponding in position in the axial direction of the hollow tube body 1 are equal in the circumferential direction of the hollow tube body 1.

[0083] In this Example 4, each group of monitoring hole groups has 3 monitoring holes 2.

[0084] In this Embodiment 4, when the underground filling monitoring signal pipe as described above is used for underground filling monitoring, the monitoring signal pipe is hung at the highest point of the roof of the underground goaf. The monitoring holes on the monitoring signal pipe are successively the 1st monitoring hole, the 2nd monitoring hole, and the 3rd monitoring hole from bottom to top. When the water volume in the hollow pipe body increases for the first time, the water level above the filling slurry reaches the lowermost 1st monitoring hole. When the water volume in the hollow pipe body no longer increases and shows the first decrease or even disappearance, the height of the filling slurry exceeds the 1st monitoring hole and is between the 1st monitoring hole and the 2nd monitoring hole.

[0085] When the water volume in the hollow pipe body increases for the second time, the water level above the filling slurry reaches the 2nd monitoring hole. When the water volume in the hollow pipe body no longer increases and shows the second decrease or even disappearance, the height of the filling slurry exceeds the 2nd monitoring hole and is between the 2nd monitoring hole and the 3rd monitoring hole.

[0086] When the water volume in the hollow pipe body increases for the third time, the water level above the filling slurry reaches the 3rd monitoring hole. When the water volume in the hollow pipe body no longer increases and shows the third decrease or even disappearance, the height of the filling slurry exceeds the 3rd monitoring hole and is between the 3rd monitoring hole and the roof of the goaf.

[0087] In summary, for the underground filling monitoring signal pipe described in the embodiments of the present invention, the number of groups of the monitoring hole groups is not limited by the number of groups in the above embodiments, and those skilled in the art can set the number of groups of the monitoring hole groups according to specific situations. Moreover, the number of monitoring holes in each monitoring hole group is not limited by the number described in the above embodiments, and those skilled in the art can set the number of monitoring holes in each group of monitoring hole groups according to specific situations. By using the underground filling monitoring signal pipe described in the embodiments of the present invention, according to the overflow water volume and the number of overflow times of the underground filling monitoring signal pipe, it is possible to effectively realize the real-time monitoring of the filling height during the filling of the underground blind area, accurately control the roof contact rate, reduce the empty roof area and the slurry leakage amount, and reduce the safety risk and cost investment.

[0088] The above are only the preferred embodiments of the present disclosure and are not used to limit the present disclosure. For those skilled in the art, the present disclosure can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

[0089] Although the specific implementation manners of the present disclosure are described above in conjunction with the drawings, it is not a limitation on the protection scope of the present disclosure. Those skilled in the art should understand that based on the technical solutions disclosed in the present invention, various modifications or deformations that can be made by those skilled in the art without creative efforts should be covered within the protection scope of the present invention.

Claims

1. An underground filling monitoring signal pipe, Characterized in that, Comprising: A transparent hollow pipe body (1), and a plurality of monitoring holes (2) with equal apertures are arranged on the radial end surface of the hollow pipe body (1); wherein, along the axial direction of the hollow pipe body (1), the distances between two adjacent monitoring holes (2) are equal; The centers of the plurality of monitoring holes (2) with equal apertures are located on the same straight line on the radial end surface of the hollow pipe body (1), forming a monitoring hole group; A plurality of groups of monitoring hole groups are arranged on the hollow pipe body (1), the number of monitoring holes (2) in each group of monitoring hole groups is equal, and the positions of the outermost monitoring holes (2) in each group of monitoring hole groups in the axial direction of the hollow pipe body (1) correspond to each other; Two groups of monitoring hole groups are symmetrically arranged on the hollow pipe body (1), that is, the distances between two monitoring holes (2) corresponding in position in the axial direction of the hollow pipe body (1) are equal in the circumferential direction of the hollow pipe body (1); A filtering device is arranged on the monitoring hole (2), and the filtering device is used for filtering particulate impurities in the water above the filling slurry and preventing the filling slurry from flowing into the hollow pipe body (1), and the water above the filling slurry flows into the hollow pipe body (1) through the monitoring hole (2) after being filtered by the filtering device; When carrying out underground filling monitoring, the monitoring signal pipe is hung at the highest point of the roof of the underground goaf, and the monitoring holes on the monitoring signal pipe are successively the first monitoring hole, the second monitoring hole,..., the nth monitoring hole from bottom to top; When the water volume in the hollow pipe body increases for the first time, the water level above the filling slurry reaches the lowermost first monitoring hole; when the water volume in the hollow pipe body no longer increases and the first decrease or even disappearance occurs, the height of the filling slurry exceeds the first monitoring hole and is located between the first monitoring hole and the second monitoring hole; When the water volume in the hollow pipe body increases for the second time, the water level above the filling slurry reaches the second monitoring hole; when the water volume in the hollow pipe body no longer increases and the second decrease or even disappearance occurs, the height of the filling slurry exceeds the second monitoring hole and is located between the second monitoring hole and the third monitoring hole; When the water volume in the hollow pipe body increases for the third time, the water level above the filling slurry reaches the third monitoring hole; when the water volume in the hollow pipe body no longer increases and the third decrease or even disappearance occurs, the height of the filling slurry exceeds the third monitoring hole and is located between the third monitoring hole and the fourth monitoring hole; And so on, when the water volume in the hollow pipe body increases for the nth time, the water level above the filling slurry reaches the nth monitoring hole; when the water volume in the hollow pipe body no longer increases and the nth decrease or even disappearance occurs, the height of the filling slurry exceeds the nth monitoring hole.

2. The underground filling monitoring signal pipe according to claim 1, Characterized in that: The filtering device is a geotextile (3) wrapped outside the monitoring hole (2).

3. The underground filling monitoring signal pipe according to claim 2, Characterized in that: The geotextile (3) is clamped on the hollow pipe body (1) through a clamping hoop (4).

4. The underground filling monitoring signal pipe according to claim 2, Characterized in that: A support framework (5) is provided on the passage of the monitoring hole (2), and the support framework (5) is used to support the geotextile (3).

5. The downhole filling monitoring signal pipe according to claim 4, characterized in that: The support framework (5) is a stainless steel mesh, and the edge of the stainless steel mesh is embedded in the hole wall of the monitoring hole (2).

6. The downhole filling monitoring signal pipe according to claim 1, characterized in that: The hollow pipe body (1) is made of plastic.

7. The downhole filling monitoring signal pipe according to claim 1, characterized in that: Each group of monitoring hole groups includes three of the monitoring holes (2).

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