Adaptive auxiliary roof-contact backfill mechanism with real-time pressure measurement, and control method therefor

Abstract

An adaptive auxiliary roof-contact backfill mechanism with real-time pressure measurement, and a control method therefor. The auxiliary roof-contact backfill mechanism comprises: a backfill pressure-bearing main body mechanism (100) having an injection space therein, the backfill pressure-bearing main body mechanism (100) being compressible and extendable; a slurry perfusion quick-connection mechanism (200) arranged on the backfill pressure-bearing main body mechanism (100) and in communication with the injection space; and a roof-contact pressure monitoring mechanism (300) arranged on the backfill pressure-bearing main body mechanism (100) and configured to monitor the pressure applied to the backfill pressure-bearing main body mechanism (100). The backfill pressure-bearing main body mechanism (100) comprises a capsule (101); and by means of the backfill pressure-bearing main body mechanism (100) formed by the cooperation of a helical spring (102) with the capsule (101), free telescopic expansion can be realized, so that said mechanism is placed at a specified backfill space position when in a compressed state. Under the action of pressurized backfill slurry, the capsule (101) extends in the axial direction of the helical spring (102) so as to realize active and comprehensive contact to a roof, and in this case, the helical spring (102), acting as an internal load-bearing framework, undergoes limited deformation accordingly.

Description

Real-time pressure measurement adaptive auxiliary top filling mechanism and control method thereof

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202410203501.3, filed on February 23, 2024, entitled “Adaptive auxiliary top filling mechanism with real-time pressure measurement and its control method”, which is incorporated herein by reference in its entirety. Technical Field

[0003] The present application relates to the technical field of mining equipment, and in particular to a real-time pressure-measurement adaptive auxiliary roof filling mechanism and a control method thereof. Background Art

[0004] Gob-side entry retention technology involves preserving existing entryways along the edge of the goaf, using specific technical means to maintain the original mining entryway along the edge of the goaf behind the mining face. This technology recovers the safety pillars used in traditional mining and re-supports the entryway in the previous section for use in the next section, maximizing resource recovery while reducing coal loss.

[0005] The supporting structures used in gob-side entry filling in mines come in various forms. Based on the construction method and materials used, they can be divided into three categories: brick masonry, geotextile bag filling, and paste (high water content) flexible film bag filling. A brief analysis of the disadvantages of each construction and filling method is as follows:

[0006] Manual brick masonry: The roadside support structure built with bricks is not fully connected to the top, which easily leads to gaps, causing air leakage and spontaneous combustion in the goaf. In addition, the workload is large, the amount of bricks to be transported is large, and the construction progress is slow;

[0007] Geotextile canvas bag filling: During the pressurized filling process, the filling port and the filling pipe connection are tied with wire, which is prone to backflow leakage, resulting in insufficient pressure on the top joint. In addition, the steps for supporting the filling bag are complicated and the force is uneven. The formed tunnel side support may rupture and collapse.

[0008] Paste (high water) soft film bag filling: The radial force of the tunnel side support body filled with soft film bags is insufficient, and it is necessary to add steel bars and other materials to strengthen the surface protection force, which increases the construction process, affects the filling progress, and makes it difficult to monitor and analyze the pressure of the tunnel side support body.

[0009] At present, in the existing goaf-side tunnel filling construction, there are still problems such as poor forming and low strength of the joint of the supporting body beside the formed tunnel, easy grouting and leakage at the grouting mouth, resulting in loose joint, uneven force and difficulty in pressure monitoring. Summary of the Invention

[0010] The present application provides a real-time pressure measurement adaptive auxiliary top connection filling mechanism and its control method, which are used to solve the problems in the prior art of filling construction along the goaf-retaining tunnel, such as poor forming and low strength of the joint top of the supporting body of the formed rear tunnel, easy grouting and leakage of grouting ports, resulting in loose top connection, uneven force and difficulty in pressure monitoring.

[0011] The present application provides a real-time pressure-measurement adaptive auxiliary top-connection filling mechanism, comprising:

[0012] A filling pressure-bearing main body mechanism has an injection space formed therein, and the filling pressure-bearing main body mechanism is capable of compression and expansion;

[0013] A slurry pouring quick plug-in mechanism is provided on the filling pressure-bearing main mechanism and is in communication with the injection space;

[0014] The top connection pressure monitoring mechanism is arranged on the filling pressure-bearing main body mechanism and is used to monitor the pressure exerted on the filling pressure-bearing main body mechanism.

[0015] According to the present application, an adaptive auxiliary top-connecting filling mechanism with real-time pressure measurement is provided. The filling pressure-bearing main body mechanism includes a sac, the injection space is provided inside the sac, and a limiting mechanism is provided in the injection space, so that the sac can be compressed and stretched along a first direction, while limiting the compression and stretching of the sac along a second direction, and the first direction is perpendicular to the second direction.

[0016] According to a real-time pressure measurement adaptive auxiliary top filling mechanism provided in the present application, the limiting mechanism includes a coil spring, the axis of the coil spring is parallel to the first direction, the two ends of the coil spring are respectively connected to the two side walls of the injection space in the first direction, and the outer periphery of the coil spring is connected to the side wall of the injection space in the second direction.

[0017] According to a real-time pressure-measuring adaptive auxiliary top-connecting filling mechanism provided in the present application, the top-connecting pressure monitoring mechanism is arranged on an outer side wall of the bladder in the first direction, and is used to monitor the pressure exerted on the filling pressure-bearing main mechanism from the first direction.

[0018] According to a real-time pressure measurement adaptive auxiliary top connection filling mechanism provided by the present application, the top connection pressure monitoring mechanism includes a rubber plate, a pressure sensor and a pressure digital display. The rubber plate is arranged on the outer wall of the bladder body, and a cavity is provided inside the rubber plate. The pressure sensor is arranged in the cavity. The pressure digital display is located outside the rubber plate and is connected to the pressure sensor.

[0019] According to a real-time pressure measurement adaptive auxiliary top connection filling mechanism provided in the present application, the sac is provided with a through hole on the side wall in the second direction, an exhaust mechanism is provided in the through hole, and the exhaust mechanism is provided on the side of the sac close to the top connection pressure monitoring mechanism.

[0020] According to the real-time pressure measurement adaptive auxiliary top filling mechanism provided by the present application, the exhaust mechanism includes an exhaust diaphragm, and the exhaust diaphragm is arranged in the through hole.

[0021] According to the real-time pressure measurement adaptive auxiliary top connection filling mechanism provided by the present application, the slurry perfusion quick plug-in mechanism is arranged on the side wall of the bladder in the second direction, and the slurry perfusion quick plug-in mechanism is arranged on the side of the bladder close to the top connection pressure monitoring mechanism;

[0022] The slurry pouring quick plug-in mechanism includes a grouting pipe, a check valve and a snap-on quick connector. One end of the grouting pipe is connected to the injection space, and the other end of the grouting pipe is located outside the bladder and connected to the snap-on quick connector. The check valve is arranged in the grouting pipe.

[0023] According to the present application, a real-time pressure-measuring adaptive auxiliary top-connection filling mechanism further includes an auxiliary lifting mechanism, which is arranged on the outer side wall of the bladder in the second direction and is arranged on a side close to the top-connection pressure monitoring mechanism;

[0024] The auxiliary lifting mechanism includes a plurality of hooks, and the plurality of hooks are distributed on the side wall of the bag in the second direction.

[0025] The control method of the adaptive auxiliary top-connecting and filling mechanism with real-time pressure measurement as described above comprises the following steps:

[0026] The filling pressure-bearing main body is placed on the upper part of the completed roadside support structure, and the filling pressure-bearing main body is hung on the top metal mesh by an auxiliary lifting mechanism;

[0027] Connect the grouting pipeline of the pump station to the slurry injection quick plug-in mechanism, start the pump station to pressurize the interior of the filling pressure-bearing main body to fill the slurry until the filling pressure-bearing main body is fully connected to the top metal mesh and the filling pressure value meets the requirements, stop the pump station, and remove the grouting pipeline;

[0028] After the filling slurry solidifies, the pressure between the filling pressure-bearing main body and the surrounding rock mass is monitored in real time by the top contact pressure monitoring mechanism.

[0029] The present application provides a real-time pressure measurement adaptive auxiliary top filling mechanism and its control method. The filling pressure-bearing main body structure composed of a coil spring and a bladder can achieve free expansion and contraction. When in a compressed state, it is placed in a designated filling space position. Under the action of pressurized filling slurry, the bladder stretches along the axis of the coil spring to achieve active and comprehensive top connection. At this time, the internal coil spring as a load-bearing skeleton produces limited deformation. The bladder produces limited expansion in the radial direction of the coil spring to adapt to the flow of slurry. At the same time, the inherent properties of the bladder material produce relative radial constraints to prevent the bladder from rupturing. During the pressurized filling process, the upper exhaust diaphragm is used to remove the gas in the filling mechanism, allowing the filling slurry to flow fully, achieving rapid and sufficient top connection of the filling bladder. At the same time, a top connection pressure monitoring mechanism is set at the top of the filling mechanism to monitor the pressure changes during the contact between the filling body and the roof in real time. After the filling slurry solidifies, the coil spring serves as a reinforcement bar for the top connection mechanism of the roadside support body, further strengthening the strength of the entire filling pressure-bearing main body structure. After comprehensive top connection, the top connection pressure monitoring mechanism is evenly stressed, which is convenient for later pressure monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] FIG1 is a schematic diagram of the external structure of the adaptive auxiliary top-connecting and filling mechanism with real-time pressure measurement provided by the present application;

[0032] FIG2 is a perspective view of the connection between the capsule and the coil spring;

[0033] FIG3 is a schematic side cross-sectional view of the adaptive auxiliary top-connecting and filling mechanism with real-time pressure measurement provided by the present application.

[0034] Figure numerals: 100, filling pressure-bearing main body mechanism; 101, bladder; 102, coil spring; 103, exhaust diaphragm; 200, slurry injection quick plug-in mechanism; 201, grouting pipe; 202, check valve; 203, snap-on quick connector; 300, top connection pressure monitoring mechanism; 301, rubber plate; 302, pressure sensor; 303, pressure digital display; 400, auxiliary lifting mechanism. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0036] 1 to 3 , a real-time pressure-measuring adaptive auxiliary top-connecting and filling mechanism and a control method thereof will be described below.

[0037] A self-adaptive auxiliary roof connection and filling mechanism with real-time pressure measurement comprises: a filling pressure-bearing main body mechanism 100, a slurry pouring quick plug-in mechanism 200, a roof connection pressure monitoring mechanism 300 and an auxiliary lifting mechanism 400.

[0038] An injection space is provided inside the filling pressure-bearing main body mechanism 100, and the filling pressure-bearing main body mechanism 100 can be compressed and stretched;

[0039] Specifically, the filling pressure-bearing main body mechanism 100 includes a capsule 101, an injection space is provided inside the capsule 101, and a limiting mechanism is provided in the injection space to enable the capsule 101 to be compressed and expanded along a first direction while limiting the compression and expansion of the capsule 101 along a second direction, the first direction being perpendicular to the second direction;

[0040] The limiting mechanism includes a coil spring 102, the axis of the coil spring 102 is parallel to the first direction, the two ends of the coil spring 102 are respectively connected to the two side walls of the injection space in the first direction, and the outer periphery of the coil spring 102 is connected to the side wall of the injection space in the second direction;

[0041] In this embodiment, the bladder 101 needs to be compressed and stretched in the vertical direction to achieve sufficient contact with the roof metal mesh, while the compression and stretching of the side wall of the bladder 101 in the horizontal direction is limited as much as possible to enhance the radial force of the roadside support body after the grouting of the bladder 101. Therefore, in this embodiment, the first direction is the vertical direction and the second direction is the horizontal direction. In other embodiments, the first direction can be other directions.

[0042] To meet the aforementioned function of the bladder 101, in this embodiment, the bladder 101 is made of vulcanized rubber and is preferably shaped like a rectangular parallelepiped. Furthermore, the coil spring 102 is preferably a rectangular spring skeleton structure made of metal, with the two ends of the rectangular spring skeleton structure connected to the upper and lower inner walls of the rectangular parallelepiped structure, and the outer side of the rectangular spring skeleton structure connected to the four side walls of the rectangular parallelepiped structure. With this structure, the bladder 101 can be compressed and extended in a first direction under the action of an external force, while in a second direction, the compression and extension of the bladder 101 are restricted by the presence of the coil spring 102.

[0043] A through hole is opened on the side wall of the sac 101 in the second direction, and an exhaust mechanism is arranged in the through hole. The exhaust mechanism is arranged on the side of the sac 101 close to the top pressure monitoring mechanism 300; specifically, the exhaust mechanism includes an exhaust diaphragm 103, and the exhaust diaphragm 103 is arranged in the through hole, that is, the exhaust diaphragm 103 is arranged on the side wall of the sac 101 close to the top end face.

[0044] The slurry pouring quick plug-in mechanism 200 is provided on the filling pressure-bearing main mechanism 100 and is connected to the injection space;

[0045] Specifically, the slurry perfusion quick plug-in mechanism 200 is provided on the side wall of the bladder 101 in the second direction, and the slurry perfusion quick plug-in mechanism 200 is provided on the side of the bladder 101 close to the top pressure monitoring mechanism 300; that is, the slurry perfusion quick plug-in mechanism 200 is provided on the side wall of the bladder 101 close to the top end surface;

[0046] The slurry injection quick plug-in mechanism 200 includes a grouting pipe 201, a check valve 202 and a snap-on quick connector 203. One end of the grouting pipe 201 is connected to the injection space, and the other end of the grouting pipe 201 is located outside the capsule 101 and is connected to the snap-on quick connector 203. A check valve 202 is provided in the grouting pipe 201; the grouting pipe 201 is preferably a high-pressure grouting pipe to meet the strength requirements of pressure grouting.

[0047] The top contact pressure monitoring mechanism 300 is provided on the filling pressure-bearing main mechanism 100 and is used to monitor the pressure exerted on the filling pressure-bearing main mechanism 100;

[0048] Specifically, the top pressure monitoring mechanism 300 is provided on an outer side wall of the bladder body 101 in the first direction, and is used to monitor the pressure from the first direction applied to the filling pressure-bearing main body 100; that is, the top pressure monitoring mechanism 300 is provided on the top end surface of the bladder body 101;

[0049] The contact pressure monitoring mechanism 300 includes a rubber plate 301, a pressure sensor 302, and a pressure digital display 303. The rubber plate 301 is disposed on the outer wall of the bladder 101. The rubber plate 301 has a cavity disposed therein. The pressure sensor 302 is disposed within the cavity. The pressure digital display 303 is located outside the rubber plate 301 and is connected to the pressure sensor 302.

[0050] In this embodiment, in order to withstand high-intensity contact pressure, the rubber plate 301 is preferably a high-strength rubber plate, and the pressure sensor 302 is preferably a wireless pressure sensor.

[0051] The auxiliary lifting mechanism 400 is disposed on the outer side wall of the bladder body 101 in the second direction, and the auxiliary lifting mechanism 400 is disposed on a side close to the top pressure monitoring mechanism 300; that is, the auxiliary lifting mechanism 400 is disposed on the side wall of the bladder body 101 close to the top end surface, so as to facilitate the lifting of the bladder body 101 on the lower side of the top metal mesh;

[0052] In this embodiment, the auxiliary lifting mechanism 400 includes a plurality of hooks, and the plurality of hooks are distributed on the side wall of the capsule 101 in the second direction.

[0053] The control method of the above-mentioned real-time pressure-measurement adaptive auxiliary top-connection filling mechanism includes the following steps:

[0054] Place the filling and pressure-bearing main body 100 on the upper part of the completed roadside support structure, and hang the filling and pressure-bearing main body 100 on the top metal mesh through the auxiliary lifting mechanism 400;

[0055] A certain height of contact with the top is reserved between the upper part of the roadside support body and the metal mesh of the roof. The sizes of the bladder 101 and the coil spring 102 are reasonably designed according to the size of the height of contact with the top. In the free state, the height of the bladder 101 can be approximately the same as the height of contact with the top, and can be slightly greater than, slightly less than, or equal to the height of contact with the top. In this embodiment, the length of the bladder 101 in the free state is preferably 500 mm, the width is 300 mm, and the height is 160 mm. The height of the bladder 101 in the free state is less than the height of contact with the top.

[0056] Specifically, when placing the sac 101 on the upper part of the tunnel side support body, first slightly compress the sac 101 to a certain extent along the first direction to facilitate placement in the top contact position. After the sac 101 is freely extended, the sac 101 is hung on the top plate metal mesh through the hook on the side of the upper edge of the sac 101 to fix the placement position of the sac 101.

[0057] Connect the grouting pipeline of the pump station to the slurry injection quick plug-in mechanism 200, start the pump station to fill the slurry under pressure into the filling pressure-bearing main body 100, until the filling pressure-bearing main body 100 is fully connected to the top metal mesh and the filling pressure value meets the requirements, stop the pump station, and remove the grouting pipeline;

[0058] Specifically, the grouting pipeline of the pump station is connected to the snap-on quick connector 203, and the pump station is started to pressurize and fill the slurry into the bladder 101. At this time, the bladder 101 stretches along the first direction, and the coil spring 102 as the internal load-bearing skeleton is deformed to a limited extent. During the process of pressurized slurry filling, the air inside the bladder 101 is discharged from the exhaust diaphragm 103. The exhaust diaphragm 103 is made of ultra-strong canvas with natural rubber vulcanized on both sides and then bonded together. The exhaust diaphragm 103 can timely remove the air inside the bladder 101 during the pressurized filling process, and will not overflow the filling slurry, thereby ensuring that the bladder 101 can be firmly connected to the top plate.

[0059] During the process of filling the slurry under pressure, the slurry inside the bladder 101 will increase, and the slurry will continue to squeeze the bladder 101 from the inside along the first direction. The top of the bladder 101 further squeezes the top pressure monitoring mechanism 300, so that the top surface of the top pressure monitoring mechanism 300 is fully connected with the top plate metal mesh. Even if the surface of the top plate metal mesh is uneven, under the squeezing of the slurry fluid, the rubber plate 301 of the top pressure monitoring mechanism 300 can still fully fit with the uneven surface of the top plate metal mesh, achieving full top contact. , achieving the effect of adaptive auxiliary connection to the top; when the filling pressure value monitored by the pressure sensor 302 is consistent with the filling pressure value of the pump station, it means that the rubber plate 301 and the top plate metal mesh have been firmly connected, and there is no gap between the two. It also means that the bottom of the bladder 101 is firmly connected to the upper part of the roadside support body, and the pump station can be stopped. After the pump station stops working, the check valve 202 in the grouting pipe 201 can prevent the slurry from flowing back, so that the pressure grouting filling process can be stopped at any time; the filling pressure value of the pump station is generally 3MPa-6MPa, which can be reasonably selected according to actual conditions.

[0060] After the filling slurry solidifies, the pressure between the filling pressure-bearing main body 100 and the surrounding rock mass is monitored in real time through the top pressure monitoring mechanism 300;

[0061] Specifically, after the filling slurry is completely solidified, the slurry pouring quick plug-in mechanism 200 can be removed. At this time, the coil spring 102 serves as a reinforcement bar for the top connection mechanism of the tunnel side support body, further strengthening the strength of the entire filling pressure-bearing main body mechanism 100. After full top connection, the top connection pressure monitoring mechanism 300 is evenly stressed, and the pressure data monitored by the pressure sensor 302 can be displayed by the pressure digital display 303. A central control base station can be set up in the tunnel to collect and transmit monitoring data. The monitoring data can be used to analyze the pressure changes of the tunnel side support body during the working face mining process, providing data support for the slurry material ratio and scheme optimization.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A self-adaptive auxiliary top filling mechanism with real-time pressure measurement, comprising: A filling pressure-bearing main body mechanism has an injection space formed therein, and the filling pressure-bearing main body mechanism is capable of compression and expansion; A slurry pouring quick plug-in mechanism is provided on the filling pressure-bearing main mechanism and is in communication with the injection space; The top connection pressure monitoring mechanism is arranged on the filling pressure-bearing main body mechanism and is used to monitor the pressure exerted on the filling pressure-bearing main body mechanism.

2. The adaptive auxiliary top filling mechanism with real-time pressure measurement according to claim 1, wherein: The filling pressure-bearing main body mechanism includes a sac body, the injection space is provided inside the sac body, and a limiting mechanism is provided in the injection space, so that the sac body can be compressed and stretched along a first direction, while limiting the compression and stretching of the sac body along a second direction, and the first direction is perpendicular to the second direction.

3. The adaptive auxiliary top filling mechanism with real-time pressure measurement according to claim 2, wherein: The limiting mechanism includes a coil spring, the axis of the coil spring is parallel to the first direction, the two ends of the coil spring are respectively connected to the two side walls of the injection space in the first direction, and the outer periphery of the coil spring is connected to the side wall of the injection space in the second direction.

4. The adaptive auxiliary top filling mechanism with real-time pressure measurement according to claim 3, wherein: The top contact pressure monitoring mechanism is arranged on an outer side wall of the bladder in the first direction, and is used to monitor the pressure exerted on the filling pressure-bearing main body mechanism from the first direction.

5. The self-adaptive auxiliary top filling mechanism with real-time pressure measurement according to claim 4, wherein: The top contact pressure monitoring mechanism includes a rubber plate, a pressure sensor and a pressure digital display. The rubber plate is arranged on the outer wall of the bladder body. A cavity is provided inside the rubber plate. The pressure sensor is arranged in the cavity. The pressure digital display is located outside the rubber plate and is connected to the pressure sensor.

6. The adaptive auxiliary top filling mechanism with real-time pressure measurement according to claim 5, wherein: The sac body is provided with a through hole on the side wall in the second direction, an exhaust mechanism is provided in the through hole, and the exhaust mechanism is provided on a side of the sac body close to the top contact pressure monitoring mechanism.

7. The adaptive auxiliary top filling mechanism with real-time pressure measurement according to claim 6, wherein: The exhaust mechanism includes an exhaust diaphragm, and the exhaust diaphragm is arranged in the through hole.

8. The adaptive auxiliary top filling mechanism with real-time pressure measurement according to claim 7, wherein: The slurry perfusion quick plug-in mechanism is arranged on the side wall of the bladder in the second direction, and the slurry perfusion quick plug-in mechanism is arranged on a side of the bladder close to the top pressure monitoring mechanism; The slurry pouring quick plug-in mechanism includes a grouting pipe, a check valve and a snap-on quick connector. One end of the grouting pipe is connected to the injection space, and the other end of the grouting pipe is located outside the bladder and connected to the snap-on quick connector. The check valve is arranged in the grouting pipe.

9. The adaptive auxiliary capping and filling mechanism with real-time pressure measurement according to claim 2, further comprising an auxiliary lifting mechanism, the auxiliary lifting mechanism being arranged on the outer side wall of the bladder in the second direction, and the auxiliary lifting mechanism being arranged on a side close to the capping pressure monitoring mechanism; The auxiliary lifting mechanism includes a plurality of hooks, and the plurality of hooks are distributed on the side wall of the bag in the second direction.

10. A control method for a real-time pressure-measurement adaptive auxiliary top-connection and filling mechanism, the control method being applied to the real-time pressure-measurement adaptive auxiliary top-connection and filling mechanism according to any one of claims 1 to 9, the control method comprising the following steps: The filling pressure-bearing main body is placed on the upper part of the completed roadside support structure, and the filling pressure-bearing main body is hung on the top metal mesh by an auxiliary lifting mechanism; Connect the grouting pipeline of the pump station to the slurry injection quick plug-in mechanism, start the pump station to pressurize the interior of the filling pressure-bearing main body to fill the slurry until the filling pressure-bearing main body is fully connected to the top metal mesh and the filling pressure value meets the requirements, stop the pump station, and remove the grouting pipeline; After the filling slurry solidifies, the pressure between the filling pressure-bearing main body and the surrounding rock mass is monitored in real time by the top contact pressure monitoring mechanism.

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