A device for monitoring deformation of surrounding rock of a coal mining roadway and supporting and reinforcing the surrounding rock

Abstract

The application discloses a kind of coal mining coal roadway surrounding rock deformation monitoring and supporting reinforcement device, comprising: hollow anchor rod, it is anchored to coal roadway surrounding along middle;Tray, it is set to the outside of the hollow anchor rod;Nut, it is threadedly connected to the outside of the hollow anchor rod, for locking the tray;First support, it is supported in the lower of the tray, and by first hydraulic cylinder is driven to adjust inclination angle to keep certain supporting force, the driving action of the first hydraulic cylinder can be recorded;Second support, it is supported in the lower of the tray, and by second hydraulic cylinder is driven to adjust inclination angle to keep certain supporting force, the driving action of the second hydraulic cylinder can be recorded;According to the driving action of first hydraulic cylinder, the driving action of second hydraulic cylinder can be realized for coal roadway surrounding along deformation monitoring, to guide the reinforcement of hollow anchor rod.

Description

Technical Field

[0001] This invention relates to the field of coal roadway support technology, specifically a device for monitoring and reinforcing the deformation of surrounding rock in mining coal roadways. Background Technology

[0002] Rock deformation is a common phenomenon during coal mine roadway mining. Due to factors such as coal seam occurrence conditions and geological structure, the stability of the surrounding rock in coal mine roadways is often compromised to some extent. To ensure safe production in the mine, it is essential to monitor the deformation of the surrounding rock and take corresponding support and reinforcement measures.

[0003] Furthermore, the principle of single-support is often followed during the support and reinforcement process, meaning that support measures are only implemented once within a single mining cycle. However, due to the influence of different geological conditions and different roadway shapes, a single support may not be sufficient to meet the stability requirements of the surrounding rock. This is especially true in roadways with significant mining impact, where deformation of the surrounding rock may be more pronounced. To address this situation, transitional support measures are often required to improve roadway stability, which is rather wasteful.

[0004] Therefore, it is necessary to provide a device for monitoring and reinforcing the deformation of surrounding rock in mining roadways to solve the problems mentioned in the background art. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device for monitoring and reinforcing the deformation of surrounding rock in a mining roadway, comprising:

[0006] A hollow anchor bolt includes an anchoring part and an extension part, wherein the anchoring part is anchored to the coal roadway perimeter, and the extension part is connected below the anchoring part and extends out of the coal roadway perimeter;

[0007] A tray, which is fitted onto the outside of the hollow anchor rod;

[0008] A nut, threadedly connected to the outside of the hollow anchor rod, is used to lock the tray;

[0009] The first support member is inclinedly supported under the tray and is driven by a first hydraulic cylinder to adjust the tilt angle in order to maintain a certain support force. The driving action of the first hydraulic cylinder can be recorded.

[0010] The second support member is inclinedly supported under the tray and is driven by a second hydraulic cylinder to adjust the tilt angle in order to maintain a certain support force. The driving action of the second hydraulic cylinder can be recorded.

[0011] The deformation monitoring of the coal roadway perimeter can be achieved by driving the first hydraulic cylinder and the second hydraulic cylinder, thereby guiding the reinforcement of hollow anchor bolts.

[0012] Furthermore, preferably, the length of the extension is 1.5-3 times the length of the anchoring portion.

[0013] Furthermore, as a preferred embodiment, an external pipe is provided on one side of the extension, the external pipe being connected to an external high-pressure injection assembly capable of providing high-pressure liquid or gas.

[0014] Furthermore, as a preferred embodiment, the bottom of the hollow anchor bolt is driven by a toggle assembly, thereby utilizing the anchoring part to actively assist in releasing stress along the coal roadway perimeter.

[0015] Furthermore, preferably, the toggle assembly includes:

[0016] The enclosure is fixed to the bottom slab of the coal roadway and fitted over the hollow anchor bolt;

[0017] A sleeve, threadedly connected to the outside of the hollow anchor rod;

[0018] A retaining sleeve, fixed to one side of the sleeve, and having multiple insert rods radially slidably disposed within the retaining sleeve, with a return spring connecting the insert rods to the retaining sleeve; and

[0019] A telescopic rod is installed on the fence, and the end of the telescopic rod has a slot corresponding to the insertion rod, and an electromagnetic block is embedded in the slot.

[0020] Furthermore, as a preferred embodiment, the fence is also movably provided with a movable seat, and the movable seat is fixedly connected to the telescopic rod.

[0021] Furthermore, preferably, the first support member and the second support member have the same structure, both including:

[0022] A card slot is fitted below a card holder, which is fixed to the bottom of the tray;

[0023] A support rod, hinged to the slot, and a slide block hinged to the other end of the support rod; and

[0024] Strain gauges are mounted on the support rod.

[0025] Furthermore, preferably, in the initial stage, the first hydraulic cylinder and the second hydraulic cylinder can adjust their extension and retraction according to the feedback from their respective strain gauges, so that both the first support member and the second support member maintain the initial support force. When the absolute value of the difference between the extension and retraction of the first hydraulic cylinder and the second hydraulic cylinder is greater than the first threshold, the high-pressure injection assembly is used to provide high-pressure liquid or gas into the hollow anchor rod.

[0026] Furthermore, as a preferred option, in the later stage, when the strain gauge detects that the rate of change of force is lower than the second threshold, the first support and the second support are removed.

[0027] Furthermore, as a preferred option, in the later stage, when the strain gauge detects that the rate of change of force is lower than the second threshold, the extension is cut off from the top of the outer pipe, and the hollow anchor is reinforced by grouting.

[0028] Compared with the prior art, the present invention provides a device for monitoring and reinforcing the deformation of surrounding rock in mining roadways, which has the following beneficial effects:

[0029] In this embodiment of the invention, by configuring a first support member and a second support member, monitoring of the coal roadway perimeter at each stage can be achieved, thereby guiding the operation of the high-pressure injection component. In the initial stage, the first and second hydraulic cylinders can adjust their extension and retraction based on the feedback from their respective strain gauges, ensuring that both the first and second support members maintain their initial support force. When the absolute value of the difference between the extension and retraction of the first and second hydraulic cylinders is greater than a first threshold, the high-pressure injection component provides high-pressure liquid or gas to the hollow anchor bolt, thereby releasing stress through fracturing. The bottom of the hollow anchor bolt is driven by a toggle component, which actively assists the coal roadway perimeter in releasing stress through the anchoring part. In the later stage, when the strain gauge detects that the rate of force change is lower than a second threshold, the extension part is cut off from the top of the outer pipe, and the hollow anchor bolt is reinforced by grouting. This configuration can better adapt to the coal roadway perimeter and provide suitable support. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a device for monitoring and reinforcing the deformation of surrounding rock in a mining roadway. Figure 1 ;

[0031] Figure 2 This is a schematic diagram of the actuating component in a coal mining roadway surrounding rock deformation monitoring and support reinforcement device.

[0032] Figure 3 This is a schematic diagram of a device for monitoring and reinforcing the deformation of surrounding rock in a mining roadway. Figure 2 ;

[0033] In the diagram: 1. Hollow anchor bolt; 2. Tray; 3. Snap ring; 4. Washer; 5. Nut; 6. Outer pipe; 7. High-pressure injection assembly; 8. Actuating assembly; 9. Card seat; 10. Card slot; 11. Support rod; 12. Slide seat; 13. Hydraulic cylinder; 81. Sleeve; 82. Snap sleeve; 83. Insert rod; 84. Return spring; 85. Telescopic rod; 86. Moving seat; 87. Slot. Detailed Implementation

[0034] Please refer to Figure 1-3In this embodiment of the invention, a device for monitoring and reinforcing the deformation of surrounding rock in a mining roadway is provided, comprising:

[0035] A hollow anchor bolt 1 includes an anchoring part and an extension part, wherein the anchoring part is anchored to the coal roadway perimeter, and the extension part is connected below the anchoring part and extends out of the coal roadway perimeter;

[0036] The tray 2 is fitted onto the outside of the hollow anchor rod 1;

[0037] Nut 5, which is threaded to the outside of the hollow anchor rod 1, is used to lock the tray 2;

[0038] The first support member is inclinedly supported under the tray 2 and is driven by the first hydraulic cylinder 13 to adjust the tilt angle in order to maintain a certain support force. The driving action of the first hydraulic cylinder 13 can be recorded.

[0039] The second support member is inclinedly supported under the tray 2 and is driven by a second hydraulic cylinder to adjust the tilt angle in order to maintain a certain support force. The driving action of the second hydraulic cylinder can be recorded.

[0040] The driving action of the first hydraulic cylinder 13 and the driving action of the second hydraulic cylinder can be used to monitor the deformation of the coal roadway perimeter, thereby guiding the reinforcement of the hollow anchor bolts.

[0041] Specifically, an external pipe 6 is provided on one side of the extension, and the external pipe 6 is connected to an external high-pressure injection assembly 7, which can provide high-pressure liquid or gas.

[0042] The first support member and the second support member have the same structure, both including:

[0043] Card slot 10 is engaged below card holder 9, which is fixed below tray 2;

[0044] Support rod 11, which is hinged to the slot 10, and the other end of the support rod 11 is hinged to a slide block 12; and

[0045] Strain gauges are mounted on the support rod 11.

[0046] In the initial stage, the first hydraulic cylinder 13 and the second hydraulic cylinder can adjust their extension and retraction according to the feedback of their respective strain gauges, so that the first support and the second support maintain the initial support force. When the absolute value of the difference between the extension and retraction of the first hydraulic cylinder 13 and the second hydraulic cylinder is greater than the first threshold, the high-pressure injection component 7 is used to provide high-pressure liquid or gas into the hollow anchor rod.

[0047] In other words, in this embodiment of the invention, by configuring the first support and the second support, the monitoring of the coal roadway perimeter at each stage can be realized, thereby guiding the operation of the high-pressure injection component. In the initial stage, the first hydraulic cylinder 13 and the second hydraulic cylinder can adjust their extension and retraction according to the feedback of their respective strain gauges, so that the first support and the second support maintain the initial support force. When the absolute value of the difference between the extension and retraction of the first hydraulic cylinder 13 and the second hydraulic cylinder is greater than the first threshold, the high-pressure injection component 7 is used to provide high-pressure liquid or gas to the hollow anchor rod, so that stress can be released by fracturing.

[0048] like Figure 3 In the later stage, when the strain gauge detects that the rate of change of force is lower than the second threshold, the first and second supports are removed.

[0049] When the strain gauge detects that the rate of change of force is lower than the second threshold, the extension is cut off from the top of the outer pipe 6, and the hollow anchor rod 1 is reinforced by grouting.

[0050] Afterwards, anchor nets and other structures can be connected to the card holder 9 to further improve the support effect;

[0051] Additionally, a retaining ring 3 can be fixed below the tray 2 to position the connecting gasket 4.

[0052] In this embodiment of the invention, the bottom of the hollow anchor rod 1 is driven by the actuating component 8, thereby actively assisting the coal roadway perimeter in releasing stress by utilizing the anchoring part. Specifically, the hollow anchor rod 1 is configured as two parts, wherein the extension part is driven by the actuating component 8, thereby actively assisting the coal roadway perimeter in releasing stress by utilizing the anchoring part.

[0053] In a preferred embodiment, the length of the extension is 1.5-3 times the length of the anchoring portion.

[0054] In this embodiment, the toggle component 8 includes:

[0055] The enclosure is fixed to the bottom plate of the coal roadway and fitted over the hollow anchor rod 1. Preferably, the height of the enclosure is adjustable.

[0056] Sleeve 81 is threaded to the outside of the hollow anchor rod 1;

[0057] A retaining sleeve 82 is fixed to one side of the sleeve 81, and a plurality of insert rods 83 are radially slidably disposed in the retaining sleeve 82. A return spring 84 is connected between the insert rods 83 and the retaining sleeve 82; and

[0058] A telescopic rod 85 is provided on the fence, and the end of the telescopic rod 85 is provided with a slot 87 corresponding to the insertion rod 83, and an electromagnetic block is embedded in the slot 87.

[0059] During implementation, when the telescopic rod 85 extends, its end can be inserted into the clamping sleeve 82. At this time, the electromagnetic block is powered, and the electromagnetic block attracts the insertion rod 83, causing it to be inserted into the slot 87. When the telescopic rod 85 retracts, it can drive the hollow anchor rod 1 to bend. After that, the electromagnetic block is de-energized, and the insertion rod 83 is reset under the action of the return spring, thereby releasing the connection between the telescopic rod 85 and the clamping sleeve 82. The hollow anchor rod 1 then undergoes elastic oscillation.

[0060] Of course, in some cases, the insertion rod 83 may be difficult to reset. To solve this problem, the width of the slot 87 can be configured to be larger. In addition, when the electromagnetic block is de-energized, the telescopic rod 85 can quickly extend and retract a certain distance to cooperate with the reset of the insertion rod 83.

[0061] In a preferred embodiment, a movable seat 86 is also movably provided on the fence, and the movable seat 86 is fixedly connected to the telescopic rod 85.

[0062] The movable seat can move around the fence, thereby driving the telescopic rod 85 to move around the fence, thus enabling the driving of multiple positions of the hollow anchor rod 1.

[0063] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for monitoring and reinforcing the deformation of surrounding rock in a mining roadway, characterized in that: include: A hollow anchor bolt (1) includes an anchoring part and an extension part, wherein the anchoring part is anchored to the coal roadway perimeter, and the extension part is connected below the anchoring part and extends out of the coal roadway perimeter; The tray (2) is fitted onto the outside of the hollow anchor rod (1); Nut (5), which is threaded to the outside of the hollow anchor rod (1), is used to lock the tray (2); The first support member is inclinedly supported under the tray (2) and is driven by the first hydraulic cylinder (13) to adjust the tilt angle in order to maintain a certain support force. The driving action of the first hydraulic cylinder (13) can be recorded. The second support member is inclinedly supported under the tray (2) and is driven by the second hydraulic cylinder to adjust the tilt angle in order to maintain a certain support force. The driving action of the second hydraulic cylinder can be recorded. Based on the driving action of the first hydraulic cylinder (13) and the driving action of the second hydraulic cylinder, the deformation monitoring of the coal roadway perimeter can be realized, thereby guiding the reinforcement of the hollow anchor bolt; The bottom of the hollow anchor rod (1) is driven by the actuating component (8), thereby actively assisting the coal roadway perimeter in releasing stress through the anchoring part; The toggle assembly (8) includes: The enclosure is fixed to the bottom plate of the coal roadway and fitted onto the outside of the hollow anchor rod (1); A sleeve (81) is threadedly connected to the outside of the hollow anchor rod (1); A retaining sleeve (82) is fixed to one side of the sleeve (81), and a plurality of insert rods (83) are radially slidably disposed in the retaining sleeve (82). A return spring (84) is connected between the insert rods (83) and the retaining sleeve (82); and Telescopic rod (85) is provided on the enclosure, and the end of the telescopic rod (85) is provided with a slot (87) corresponding to the insert rod (83), and an electromagnetic block is embedded in the slot (87); The fence is also movably provided with a movable seat (86), and the movable seat (86) is fixedly connected to the telescopic rod (85).

2. The device for monitoring and reinforcing the deformation of surrounding rock in a mining roadway according to claim 1, characterized in that: The length of the extension is 1.5 to 3 times the length of the anchoring part.

3. The device for monitoring and reinforcing the deformation of surrounding rock in a mining roadway according to claim 1, characterized in that: An external pipe (6) is provided on one side of the extension, and the external pipe (6) is connected to an external high-pressure injection assembly (7), which is capable of providing high-pressure liquid or gas.

4. The device for monitoring and reinforcing the deformation of surrounding rock in a mining roadway according to claim 1, characterized in that: The first support member and the second support member have the same structure, both including: Card slot (10) is attached to the lower part of card holder (9), which is fixed to the lower part of tray (2); A support rod (11) is hinged to the slot (10), and a slide (12) is hinged to the other end of the support rod (11); Strain gauges are mounted on the support rod (11).

5. The device for monitoring and reinforcing the deformation of surrounding rock in a mining roadway according to claim 3, characterized in that: In the initial stage, the first hydraulic cylinder (13) and the second hydraulic cylinder can adjust their extension and retraction according to the feedback of their respective strain gauges, so that the first support and the second support maintain the initial support force. When the absolute value of the difference between the extension and retraction of the first hydraulic cylinder (13) and the second hydraulic cylinder is greater than the first threshold, the high-pressure injection component (7) is used to provide high-pressure liquid or gas into the hollow anchor rod.

6. The device for monitoring and reinforcing the deformation of surrounding rock in a mining roadway according to claim 5, characterized in that: In the later stage, when the strain gauge detects that the rate of change of force is lower than the second threshold, the first and second supports are removed.

7. The device for monitoring and reinforcing the deformation of surrounding rock in a mining roadway according to claim 5, characterized in that: In the later stage, when the strain gauge detects that the rate of change of force is lower than the second threshold, the extension is cut off from the position above the outer pipe (6), and the hollow anchor rod (1) is reinforced by grouting.

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