Elastic expandable formation protection liner and method of use

Abstract

The invention relates to the technical field of surrounding rock supporting components, in particular to an elastic expandable rock stratum protection liner and a using method.The elastic expandable rock stratum protection liner comprises an extension supporting layer, a functional layer, a plurality of second capsules, an elastic buffer layer and a plurality of first capsules; one end of the elastic buffer layer is connected with the extension supporting layer, the multiple first capsules are arranged in the elastic buffer layer, the multiple first capsules are arranged in a matrix mode in the extension direction of the elastic buffer layer and on the plane orthogonal to the extension direction, the first capsules are filled with adhesives, the functional layer is connected with the elastic buffer layer, and the elastic buffer layer is connected with the functional layer. A plurality of second capsules are arranged in the functional layer, the second capsules are arranged in a matrix along the extension direction of the elastic buffer layer and on a plane orthogonal to the extension direction, and the second capsules are filled with adhesives or flame retardants. According to the elastic expandable rock stratum protection liner, energy absorption and buffering of surrounding rock changes are facilitated, and the supporting effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of surrounding rock support components, and in particular to an elastic expandable rock formation protective liner and a use method thereof. Background Art

[0002] During tunnel support, when the surrounding rock is subjected to external forces or changes in ground stress, such as roof pressure, dynamic load impact, mechanical vibration or hydrological changes, it is easy to cause accidents such as falling off, collapse or spalling. In addition, the surrounding rock itself often becomes loose, broken and easy to collapse as time changes.

[0003] The existing hard liner and rigid frame cannot adapt to the small deformation of the surrounding rock. When the surrounding rock changes greatly, the liner will crack and fail. At the same time, the hard liner cannot buffer and absorb the impact of the surrounding rock. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention proposes an elastic expandable rock formation protective liner, which is convenient for absorbing and buffering the energy of surrounding rock changes and improving the support effect.

[0006] An elastic expandable rock formation protective liner according to an embodiment of the present invention comprises:

[0007] An extended support layer, wherein the extended support layer is in contact with the surrounding rock;

[0008] an elastic buffer layer and a plurality of first capsules, wherein one end of the elastic buffer layer is connected to the extension support layer, the plurality of first capsules are disposed in the elastic buffer layer, and the plurality of first capsules are arranged in a matrix in an extension direction of the elastic buffer layer and in a plane orthogonal to the extension direction, wherein the first capsules are filled with an adhesive;

[0009] A functional layer and a plurality of second capsules, wherein the functional layer is connected to the elastic buffer layer, wherein the functional layer has a plurality of second capsules therein, and the second capsules are arranged in a matrix along the extension direction of the elastic buffer layer and on a plane orthogonal to the extension direction, wherein the second capsules are filled with an adhesive or a flame retardant.

[0010] The elastic expandable rock formation protection liner of the embodiment of the present invention is convenient for absorbing energy and buffering the changes of the surrounding rock, thereby improving the support effect.

[0011] In some embodiments, the second capsules filled with adhesive and the second capsules filled with flame retardant are alternately arranged in the extension direction of the elastic buffer layer, and / or a plurality of the second capsules are arranged in a matrix on a plane orthogonal to the extension direction and are alternately filled with flame retardant or adhesive in a direction approaching or away from the elastic buffer layer.

[0012] In some embodiments, the volume of the second capsules filled with flame retardant gradually increases in a direction away from the elastic buffer layer.

[0013] In some embodiments, a volume of the first capsule close to the extended support layer or functional layer is greater than a volume of the first capsule far from the extended support layer or functional layer.

[0014] In some embodiments, the extended support layer includes a skeleton layer and a filling layer, the filling layer covers the skeleton layer, the skeleton layer is a metal mesh, and the filling layer is fiber-reinforced concrete.

[0015] In some embodiments, the elastic expandable rock formation protective pad further comprises a fiber braided layer, wherein the fiber braided layer is connected to an end of the extension support layer away from the elastic buffer layer.

[0016] The fiber braided layer is formed by braiding one or more materials including carbon fiber, aramid fiber and ultra-high molecular weight polyethylene fiber.

[0017] In some embodiments, at least a portion of the adhesive filled in the second bladder is a silicone hot-vulcanized adhesive.

[0018] In some embodiments, the elastic buffer layer is made of thermoplastic elastomer or polyurethane elastomer.

[0019] In some embodiments, at least one of the elastic buffer layer or the functional layer is provided with a pressure monitoring component, a stress monitoring component, a temperature monitoring component, and a humidity monitoring component.

[0020] A method for using an elastic expandable rock formation protective liner includes: setting the liner according to the surrounding rock conditions of the support area during installation;

[0021] Clean and fix the gasket,

[0022] Set up pressure monitoring devices, stress monitoring devices, temperature monitoring devices and humidity monitoring devices to be linked with the downhole monitoring system.

[0023] During liner maintenance, if the liner is damaged, quick repair materials can be used to seal the local rupture;

[0024] If the internal elastic layer fails or is severely corroded, the failed part can be cut and replaced with a new liner.

[0025] The elastic expandable rock formation protection liner of the embodiment of the present invention is convenient for absorbing energy and buffering the changes of the surrounding rock, thereby improving the support effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of an elastic expandable rock formation protective liner according to an embodiment of the present invention.

[0027] Figure 2 Schematic diagram of the arrangement of the first capsule and the second capsule on the functional layer according to an embodiment of the present invention.

[0028] Figure 3 Schematic diagram of the arrangement of the second capsule in the functional layer according to an embodiment of the present invention.

[0029] Figure 4 Schematic diagram of a fiber braided layer according to an embodiment of the present invention.

[0030] Figure 5 Schematic diagram of an elastic buffer layer according to an embodiment of the present invention.

[0031] Figure 6 Schematic diagram of the functional layer of an embodiment of the present invention.

[0032] Reference numerals:

[0033] Extended support layer 1, elastic buffer layer 2, first capsule 3, functional layer 4, second capsule 5, fiber braided layer 6, surrounding rock 7, pressure monitoring component 8, stress monitoring component 9, temperature monitoring component 10, humidity monitoring component 11. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0035] The elastic expandable rock formation protective pad of the embodiment of the present invention comprises: an extension support layer 1, a functional layer 4 and a plurality of second capsules 5, an elastic buffer layer 2 and a plurality of first capsules 3, the extension support layer 1 is in contact with the surrounding rock 7,

[0036] One end of the elastic buffer layer 2 is connected to the extension support layer 1. A plurality of first capsules 3 are provided in the elastic buffer layer 2. The plurality of first capsules 3 are arranged in a matrix in the extension direction of the elastic buffer layer 2 and in a plane orthogonal to the extension direction. The first capsules 3 are filled with an adhesive.

[0037] The functional layer 4 is connected to the elastic buffer layer 2 and contains a plurality of second capsules 5. The second capsules 5 are arranged in a matrix along the extension direction of the elastic buffer layer 2 and on a plane orthogonal to the extension direction, wherein the second capsules 5 are filled with adhesive or flame retardant.

[0038] Specifically, the extended support layer 1 is aligned with the surrounding rock 7 to support the surrounding rock 7. The extended support layer 1 is suitable for directly contacting the surrounding rock 7 and supporting it.

[0039] The elastic buffer layer 2 is arranged on the side of the extended support layer 1 away from the surrounding rock 7. The elastic buffer layer 2 is suitable for buffering the impact of the surrounding rock 7 to absorb energy. At the same time, during installation, the elastic buffer layer 2 can be placed in a compressed state so that the elastic buffer layer 2 stretches outward to keep the extended support layer 1 in contact with the surrounding rock 7, thereby improving the adaptability of the liner itself.

[0040] Furthermore, the portion of the elastic buffer layer 2 connected to the extended support layer 1 may be a sponge. After absorbing water and expanding, the elastic buffer layer 2 applies pressure to the extended support layer 1 so that the extended support layer 1 fits the surrounding rock 7. The portion of the elastic buffer layer 2 connected to the extended support layer 1 may be made of existing polyurethane foam or silicone.

[0041] Furthermore, if the surrounding rock 7 continues to deform on a large scale, the flexible liner will buffer the expansion of rock cracks and reduce the probability of large rock pieces falling off.

[0042] The first capsule 3 is filled with adhesive. When the surrounding rock 7 impacts the elastic buffer layer 2 and causes damage to it, the first capsule 3 can release the adhesive when it is broken by force, and self-repair the cracks in the liner, providing the liner with a long deformation applicable period and improving its service life.

[0043] The functional layer 4 and multiple second capsules 5 are connected to the end of the elastic buffer layer 2 away from the extension support layer 1. The functional layer 4 contains multiple second capsules 5. The second capsules 5 are arranged in a matrix along the extension direction of the elastic buffer layer 2 and on a plane perpendicular to the extension direction. The second capsules 5 are filled with adhesive or flame retardant. The elastic buffer layer 2 extends in the left-right direction and extends in the front-to-back direction on a plane perpendicular to the extension direction. The second capsules 5 are arranged in a matrix in the left-right direction and in the front-to-back direction to be evenly distributed in the functional layer 4.

[0044] When the surrounding rock 7 is deformed or impacted, the extended support layer 1 contacts the surrounding rock 7 to provide initial support. The elastic buffer layer 2 absorbs and disperses the impact energy. At the same time, it may expand due to force or water absorption, exerting pressure on the extended support layer 1 to maintain its close fit with the surrounding rock 7. If the surrounding rock 7 continues to deform on a large scale, the flexible liner can buffer the expansion of rock cracks and reduce the probability of large pieces of rock falling off. If the elastic buffer layer 2 or the functional layer 4 is damaged, the adhesive in the first capsule 3 or the second capsule 5 will be released and fill the cracks to achieve self-repair. This provides the liner with a long deformation application cycle and increases its service life.

[0045] The second capsules 5 in the functional layer 4 can also release flame retardants to suppress fire, that is, to prevent the liner from spontaneous combustion or to prevent surrounding objects from igniting the liner.

[0046] The elastic expandable rock formation protective liner of the present invention, by providing an elastic buffer layer 2, facilitates energy absorption and cushioning of surrounding rock 7 changes, thereby improving support effectiveness. The elastic buffer layer 2 and functional layer 4 allow adhesive to be released from the second capsule 5 and first capsule 3 in the event of damage to the liner body, enabling self-repair in the event of damage, thereby improving support effectiveness and service life.

[0047] In some embodiments, the second capsules 5 filled with adhesive and the second capsules 5 filled with flame retardant are alternately arranged in the extension direction of the elastic buffer layer 2, and / or, multiple second capsules 5 are arranged in a matrix on a plane orthogonal to the extension direction and are alternately filled with flame retardant or adhesive in the direction close to or away from the elastic buffer layer 2.

[0048] Specifically, the second capsules 5 filled with adhesive and the second capsules 5 filled with flame retardant are alternately arranged in the front-to-back direction and the left-to-right direction, or the second capsules 5 filled with adhesive and the second capsules 5 filled with flame retardant are alternately arranged in the front-to-back direction or the left-to-right direction. The front-to-back or left-to-right arrangement ensures that no matter in which direction the liner is damaged, it can quickly obtain self-repair or flame-retardant protection, balancing the requirements of the two functions of self-repair and flame retardancy, so that the liner can exhibit relative performance in different directions, and the elastic buffer layer 2 can obtain uniform protection in all directions.

[0049] The elastic expandable rock formation protection pad of the embodiment of the present invention can provide self-repairing and flame retardant protection in different directions through alternating arrangement and matrix arrangement, so that the pad can better adapt to the deformation and impact of the surrounding rock 7, and cope with spontaneous combustion, thereby improving the overall service life of the pad.

[0050] In some embodiments, the volume of the second capsules 5 filled with flame retardant gradually increases as they move away from the elastic buffer layer 2. Specifically, because the functional layer 4 is arranged closer to the equipment in the tunnel, the volume of the second capsules 5 filled with flame retardant gradually increases to address the risk of external equipment or personnel, helping to provide flame retardant protection for the liner in extreme situations such as fire.

[0051] In some embodiments, the volume of the first capsule 3 near the extension support layer 1 or the functional layer 4 is larger than the volume of the first capsule 3 far from the extension support layer 1 or the functional layer 4. The larger volume of the first capsule 3 near the extension support layer 1 or the functional layer 4 results in a higher adhesive content between the elastic buffer layer 2 and the extension support layer 1 or the functional layer 4. When the liner is impacted or damaged, the larger capsule can release adhesive more quickly, filling the cracks between the extension support layer 1, the elastic buffer layer 2, and the functional layer 4, achieving faster and more effective self-repair, enhancing the overall strength of the support layer, and improving the liner's adaptability to deformation of the surrounding rock 7.

[0052] In some embodiments, the extended support layer 1 includes a skeleton layer and a filling layer. The filling layer covers the skeleton layer. The skeleton layer is a metal grid, and the filling layer is fiber-reinforced concrete.

[0053] Specifically, the skeleton layer uses a metal mesh as a support structure. The metal mesh is high-strength, corrosion-resistant, and easy to manufacture, while the filling layer uses fiber-reinforced concrete. The addition of fiber material can significantly improve the tensile strength and toughness of concrete, thereby enhancing the structural strength of the filling layer. The filling layer tightly wraps around the exterior of the skeleton layer, providing support and cushioning for the liner. The use of fiber-reinforced concrete gives the filling layer greater crack resistance and durability, effectively resisting the squeezing and shearing effects of the surrounding rock 7.

[0054] The skeleton layer provides a stable support framework for the infill layer, ensuring its uniform distribution and overall stability. Furthermore, the metal mesh's grid structure helps increase the liner's flexibility and adaptability, enabling it to better adapt to deformations of the surrounding rock 7. The metal mesh's grid structure and the flexibility of the fiber-reinforced concrete allow the extended support layer 1 to adapt well to deformations of the surrounding rock 7, reducing friction and wear between the liner and the surrounding rock 7, and improving the stability and safety of the extended support layer 1 in support.

[0055] In some embodiments, the elastic expandable rock formation protective pad further includes a fiber braided layer 6, which is connected to the end of the extension support layer 1 away from the elastic buffer layer 2.

[0056] The fiber braided layer 6 is formed by braiding one or more materials including carbon fiber, aramid fiber, and polyethylene fiber.

[0057] Specifically, the fiber braided layer is corrosion-resistant and wear-resistant, allowing it to withstand long-term use in harsh underground environments without damage, thereby extending the service life of the liner. The fiber braided layer 6 has good flexibility and adaptability, adapting well to the deformation and displacement of the surrounding rock 7, reducing friction and wear between the liner and the surrounding rock 7.

[0058] In some embodiments, the adhesive at least partially filled in the second capsule 5 is a silicone hot-vulcanized adhesive.

[0059] Specifically, silicone hot-vulcanized adhesives have excellent viscosity, providing reliable adhesion under various conditions. This high viscosity allows the second capsule 5 to adhere tightly to the rest of the liner when subjected to external forces, ensuring the integrity and stability of the liner. Silicone hot-vulcanized adhesives are heat-resistant and can maintain stable adhesion in high-temperature environments, ensuring the reliability and durability of the liner at high temperatures. Furthermore, silicone hot-vulcanized adhesives are easily detected during use. When the second capsule 5 ruptures, it releases the silicone hot-vulcanized adhesive, producing an odor that easily indicates damage to the functional layer 4.

[0060] In some embodiments, the elastic buffer layer 2 is made of thermoplastic elastomer or polyurethane elastomer.

[0061] Specifically, it can be understood that the material of the non-sponge portion of the elastic buffer layer 2 is thermoplastic elastomer or polyurethane elastomer, which can improve the wear resistance and stability of the liner during use.

[0062] In some embodiments, a pressure monitoring component 8 , a stress monitoring component 9 , a temperature monitoring component 10 and a humidity monitoring component 11 are provided on at least one of the elastic buffer layer 2 or the functional layer 4 .

[0063] Specifically, a pressure monitoring device 8, a stress monitoring device 9, a temperature monitoring device 10, and a humidity monitoring device 11 are provided on at least one of the elastic buffer layer 2 or the functional layer 4. The pressure, stress, temperature, or humidity of the elastic buffer layer 2 or the functional layer 4 are monitored. Simultaneously, the pressure monitoring device 8, the stress monitoring device 9, the temperature monitoring device 10, and the humidity monitoring device 11 are linked to the downhole monitoring system, enabling operators to remotely monitor the support status and promptly monitor and maintain abnormal areas.

[0064] For example, the pressure on the elastic buffer layer 2 or functional layer 4 can be monitored in real time to ensure that it operates within the design pressure range and prevent damage or failure due to excessive pressure. Monitor the stress state of the elastic buffer layer 2 or functional layer 4 when it is under stress to prevent structural damage due to excessive stress and evaluate the bearing capacity and stability of the structure. Monitor the temperature changes of the elastic buffer layer 2 or functional layer 4 to prevent performance degradation or failure due to excessively high or low temperatures, and prevent fires at the same time. Monitor the humidity changes of the elastic buffer layer 2 or functional layer 4 to prevent performance degradation or failure due to excessively high or low humidity. Operators can view the pressure, stress, temperature and humidity data of the elastic buffer layer 2 or functional layer 4 in real time through the monitoring system, detect abnormal areas in a timely manner, and conduct monitoring and maintenance. This linkage mechanism improves the efficiency and accuracy of monitoring and reduces the cost and risk of manual inspections.

[0065] A method for using an elastic expandable rock formation protective liner includes: setting the liner according to the surrounding rock conditions of the support area during installation;

[0066] Clean and fix the gasket,

[0067] Set up pressure monitoring components 8, stress monitoring components 9, temperature monitoring components 10 and humidity monitoring components 11 to work in conjunction with the downhole monitoring system.

[0068] During liner maintenance, if the liner is damaged, quick repair materials can be used to seal the local rupture;

[0069] If the internal elastic layer fails or is severely corroded, the failed part can be cut and replaced with a new liner.

[0070] Specifically, for smooth or partially flat surrounding rock 7, a fixing method such as hanging nets and anchor bolts can be selected. For areas where the surrounding rock 7 is highly broken or there is a potential risk of large-scale falling blocks, a flexible metal mesh can be laid first, and then an elastic pad can be attached to its outer layer, and the entire structure can be fixed by anchor rods or anchor cables. In areas where the surrounding rock 7 changes suddenly or transitions, such as the corner from the roof to the coal wall, the edge of the pad can be cut into a corresponding shape and fixed with a high-strength rubber strip or bayonet to ensure overall continuity. When the surrounding rock 7 is deformed or subjected to an impact load, the middle elastic buffer layer 2 deforms to absorb energy. When the elastic buffer layer 2 and the functional layer 4 sensing layer are subjected to a pressure exceeding the preset pressure or deformation, the second capsule 5 or the first capsule 3 releases the flame retardant or adhesive. At the same time, the force monitoring component, the stress monitoring component 9, the temperature monitoring component 10 and the humidity monitoring component 11 are linked with the downhole monitoring system to prompt the operator with an alarm signal.

[0071] When laying the liner, it only needs to be anchored or meshed, and there is no need to frequently debug the chemical foaming equipment; local repairs can be made during later maintenance, greatly reducing construction time and costs.

[0072] The elastic expandable rock formation protective pad of the embodiment of the present invention is convenient for absorbing energy and buffering the changes of the surrounding rock 7, thereby improving the support effect. In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 limiting the present invention.

[0073] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0074] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0075] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0076] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0077] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An elastic expandable rock formation protective liner, characterized in that: include: An extended support layer, wherein the extended support layer is in contact with the surrounding rock; an elastic buffer layer and a plurality of first capsules, wherein one end of the elastic buffer layer is connected to the extension support layer, the plurality of first capsules are disposed in the elastic buffer layer, and the plurality of first capsules are arranged in a matrix in an extension direction of the elastic buffer layer and in a plane orthogonal to the extension direction, wherein the first capsules are filled with an adhesive; A functional layer and a plurality of second capsules, wherein the functional layer is connected to the elastic buffer layer, wherein the functional layer has a plurality of second capsules therein, and the second capsules are arranged in a matrix along the extension direction of the elastic buffer layer and on a plane orthogonal to the extension direction, wherein the second capsules are filled with an adhesive or a flame retardant.

2. The elastic expandable rock formation protective liner according to claim 1, characterized in that: The second capsules filled with adhesive and the second capsules filled with flame retardant are alternately arranged in the extension direction of the elastic buffer layer, and / or a plurality of second capsules are arranged in a matrix on a plane orthogonal to the extension direction and are alternately filled with flame retardant or adhesive in a direction approaching or away from the elastic buffer layer.

3. The elastic expandable rock formation protective pad according to claim 2, characterized in that: The volume of the second capsule filled with flame retardant gradually increases in a direction away from the elastic buffer layer.

4. The elastic expandable rock formation protective liner according to claim 1, characterized in that: The volume of the first capsule close to the extended support layer or the functional layer is greater than the volume of the first capsule far from the extended support layer or the functional layer.

5. The elastic expandable rock formation protective pad according to claim 1, characterized in that: The extended support layer includes a skeleton layer and a filling layer. The filling layer covers the skeleton layer. The skeleton layer is a metal grid, and the filling layer is fiber-reinforced concrete.

6. The elastic expandable rock formation protective liner according to claim 1, characterized in that: It also includes a fiber braided layer, the fiber braided layer is connected to the end of the extension support layer away from the elastic buffer layer, The fiber braided layer is formed by braiding one or more materials including carbon fiber, aramid fiber, and ultra-high molecular weight polyethylene fiber.

7. The elastic expandable rock formation protective pad according to claim 1, characterized in that: The adhesive at least partially filled in the second capsule is a silicone hot-vulcanized adhesive.

8. The elastic expandable rock formation protective liner according to claim 1, characterized in that: The elastic buffer layer is made of thermoplastic elastomer or polyurethane elastomer.

9. The elastic expandable rock formation protective liner according to any one of claims 1 to 8, characterized in that: At least one of the elastic buffer layer or the functional layer is provided with a pressure monitoring component, a stress monitoring component, a temperature monitoring component and a humidity monitoring component.

10. A method for using an elastic expandable rock formation protective liner, characterized in that: include: When using and installing, the liner setting method should be set according to the surrounding rock conditions of the support area. Clean and fix the gasket, Set up pressure monitoring devices, stress monitoring devices, temperature monitoring devices and humidity monitoring devices to be linked with the downhole monitoring system. During liner maintenance, if the liner is damaged, quick repair materials can be used to seal the local rupture; If the internal elastic layer fails or is severely corroded, the failed part can be cut and replaced with a new liner.

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