Device and method for repairing fillings by inducing microbial nanomaterials based on acoustic-thermal effect

Abstract

The present invention discloses an apparatus and method for repairing filling bodies by inducing microbial nanomaterials based on the acoustic-thermal effect, and relates to the technical field of filling and mining. The apparatus and method are used to repair cracks in filling bodies with fissures in underground filling mining areas through filling body reinforcement, acoustic-thermal enhancement, microbial repair, multifunctional monitoring, and visual regulation. Acoustic signals are used to monitor and regulate the diffusion and distribution of bacterial communities, thereby achieving uniform distribution and enhanced activity of the bacterial communities. At the same time, the apparatus and method ensure efficient repair of damaged filling bodies by non-aqueous nanomaterials containing microorganisms, ultimately achieving long-term stable bearing of underground filling bodies. Distribution blind spots are avoided, and the problem of secondary degradation of filling bodies by water-based grouting materials is circumvented.

Description

Technical Field

[0001] The present invention relates to the technical field of filling mining, and in particular to a device and method for repairing a filling body by inducing microbial nanomaterials based on acoustic-thermal effects. Background Art

[0002] Mine tunnels and stope fillings often crack or fail in long-term stress and strain environments, resulting in a decrease in their bearing capacity, which can easily lead to safety hazards. Current repair technologies mostly use water-based grouting materials, but water-based grouting repair materials have problems such as secondary softening, poor fluidity control, and difficulty in solidification control. In recent years, microbial remediation technology has been studied in the repair of rocks with fractured surfaces. Microbial mineralization technology can generate precipitates such as calcium carbonate through microbial metabolism in fractures or heterogeneous areas, and has good self-repairability and long-term stability. However, the distribution and precipitation efficiency of existing microbial grouting repair technologies are subject to complex control conditions. In actual engineering, if the microbial flora is unevenly dispersed, the repair efficiency of the damaged filling will be greatly reduced.

[0003] Patent CN113323441A discloses a method for increasing the self-healing width of concrete cracks. This method involves adding homogenized sand powder soaked in a nutrient solution and then a bacterial solution to the cracks. The microbial metabolism of the sand powder, followed by the bacterial solution, produces calcium carbonate. This enrichment of calcium carbonate crystal ions creates a cementitious material, ultimately repairing the cracks.

[0004] Patent CN112299767A discloses an inexpensive and efficient microbial self-repairing concrete and its preparation method. The crack self-repairing concrete uses aerobic alkaliphilic mixed bacteria with mineralization and deposition characteristics as self-repairing agents, and whey and calcium acetate as nutrients for the metabolism of the mixed bacteria. The calcium carbonate precipitation produced during the metabolism of the microbial self-repairing agent can effectively self-repair concrete cracks, thereby improving the crack self-repair ability of the concrete during service and thus improving the durability of the concrete.

[0005] Meanwhile, patent CN111155960B discloses a method for sealing coal seam gas extraction boreholes based on MICP technology. This method creates a sealed space inside the borehole by filling it with sealing material. A nutrient solution and microorganisms are periodically injected, reacting to generate large amounts of carbonates, which repair cracks and prevent air leakage during high-concentration gas extraction. However, this technology struggles with uniformly controlling the flow and diffusion of the nutrient solution and microorganisms. Uneven distribution can cause localized solidification, resulting in poor crack repair effectiveness.

[0006] Patent CN107446917A discloses a method for increasing yeast activity. By using electromagnetic waves of a certain frequency in conjunction with acoustic wave equipment to resonate and stimulate the yeast, the method increases cell osmotic energy, enhances cell activity, and promotes chemical decomposition and synthesis in the body. This technology uses a solution environment, similar to the transmission of sound waves in a homogeneous environment. However, underground rock formations and rocks are heterogeneous, and the pore-crack structure within the damaged filling is more complex, making sound wave transmission less effective in certain areas.

[0007] In practical applications, the technical challenges of injecting microbial-containing grouting materials to repair fractured coal and rock masses or backfills under load remain numerous. First, the complex internal structure of fractured coal, rock, or backfill makes it difficult to target and evenly distribute the microbial community across the fracture surfaces, resulting in low repair efficiency and a tendency for the microbial community to form blind clusters within the pores, leading to poor distribution uniformity. In this scenario, only certain areas of dense microbial community density can form localized crack repair efficiency zones, limiting the overall crack repair area. This leaves a significant number of weak structural surfaces within the coal and rock masses, posing a risk of instability and compromising the long-term load-bearing stability of the backfill. Second, conventional microbial fluids, all using water-based grouting materials, are susceptible to secondary softening of the backfill (coal and rock). Furthermore, water can trigger a series of water-locking reactions, affecting the fluidity of the repair material, making it difficult for the repair material to penetrate all fractures and weak structural interfaces. As the grouting material solidifies, numerous unrepaired areas emerge, severely impacting the overall load-bearing capacity of the repaired backfill. At the same time, the in-situ stress state underground can cause partial closure of the grouting channel, further affecting the diffusion of the grouting material. Therefore, existing technologies still face insurmountable bottlenecks in improving overall repair efficiency, requiring further innovation and optimization. Summary of the Invention

[0008] The purpose of the present invention is to provide a device and method for repairing a filling body with microbial nanomaterials based on the acoustic-thermal effect. To achieve the above purpose, the present invention provides the following technical solutions:

[0009] The device for repairing a filling body using microbial nanomaterials induced by the acoustic-thermal effect comprises a filling body, wherein the bottom of the filling body is a base plate, the top of the filling body is a roof plate, and the roof plate has an overlying rock layer that forms a load; grouting boreholes are arranged in the filling body in the form of deep and shallow holes, with the middle of the filling body as the center of the grouting repair area; acoustic wave monitoring probes are evenly distributed on the filling body; each grouting borehole is connected to a non-aqueous nano-repairing material storage tank A and a non-aqueous nano-repairing material storage tank B respectively through a pipeline; the non-aqueous nano-repairing material storage tank A is used to input a non-aqueous nano-material mixed with a microbial flora into the grouting borehole; the non-aqueous nano-material storage tank B is used to input a non-aqueous nano-material mixed with an accelerator into the grouting borehole; and the non-aqueous nano-material contains acoustic nanoparticles.

[0010] An acoustic-thermal combination control device is installed at the bottom of the grouting borehole; the acoustic-thermal combination control device includes a multi-frequency acoustic wave array, an acoustic field modulation module, an auxiliary heat source, and a multi-functional monitoring sensor; the multi-frequency acoustic wave array and the acoustic field modulation module combine to generate low, medium, and high-frequency acoustic fields, which are used to promote the uniform distribution of acoustic nanoparticles and accelerate microbial mineralization reactions; the auxiliary heat source is used to promote the fluidity of non-aqueous nanomaterials.

[0011] Furthermore, the acoustic wave monitoring probe is connected to the ground monitoring center through an information transfer processing interface to process the acoustic wave monitoring data for generating a three-dimensional fracture space model of the filling body.

[0012] Furthermore, the grouting holes are arranged in a diffusion circle or spider web-like distribution on the plane.

[0013] Furthermore, the non-aqueous nano-repairing material A storage tank is connected to the microorganism storage tank and the non-aqueous nano-material storage tank; the non-aqueous nano-material B storage tank is connected to the quick-setting agent storage tank, and is also connected to the non-aqueous nano-material storage tank; valves are provided on the outlet pipes of the non-aqueous nano-repairing material A storage tank and the non-aqueous nano-material B storage tank.

[0014] The method for repairing a filling body with microbial nanomaterials induced by the acoustic-thermal effect, using the device for repairing a filling body with microbial nanomaterials induced by the acoustic-thermal effect, comprises the following steps:

[0015] S1. Open the valve at the outlet of the non-aqueous nano-repairing material A storage tank and inject the non-aqueous nano-repairing material A containing microbial flora into the filling body through each grouting borehole;

[0016] S2. Turn on the acoustic-thermal combination control device at the bottom of the grouting borehole to apply a low-frequency acoustic field with a frequency of 0.1 to 10 kHz. Simultaneously, turn on the auxiliary heat source, whose temperature is set at 40°C to 45°C, to promote the flow and diffusion of the non-aqueous nano-healing material A. Synchronize the acoustic field change data to the ground monitoring center for monitoring until the non-aqueous nano-healing material A is evenly distributed in the three-dimensional fracture space model image area and the flow image of the non-aqueous nano-healing material A covers the three-dimensional fracture space model image. Then, turn off the auxiliary heat source and turn on the multi-function monitoring sensor to monitor the pH value at the bottom of each grouting borehole.

[0017] S3. By adjusting the multi-frequency acoustic wave array and the acoustic field modulation module, a medium-frequency acoustic field is applied with a frequency of 100kHz to 1MHz. Under the action of the medium-frequency acoustic wave, the acoustic nanoparticles of the non-aqueous nanorepair material A begin to aggregate and form microbial-inducing particles. Then, the acoustic field is alternately switched between medium and low frequencies to achieve uniform distribution of the microbial-inducing particles. Simultaneously, the migration of the microbial flora is monitored using a multifunctional monitoring sensor until the flora density is uniform.

[0018] S5. Adjust the multi-frequency acoustic wave array and acoustic field modulation module again, setting a high-frequency acoustic field with a frequency of 1 MHz to 10 MHz to promote further growth of the microbial flora in the non-aqueous nano-repair material A and increase the reparative activity of the flora. Simultaneously control the ground monitoring center to connect to the multi-functional monitoring sensor to monitor changes in the microbial distribution area. When the microbial flora distribution area gradually decreases or disappears, the reparation work of the fracture filling body is completed.

[0019] S6. Open the non-aqueous nanomaterial B storage tank, backfill the grouting borehole with the non-aqueous nanomaterial B, and completely generate a solidified body of the grouting material B.

[0020] Preferably, the time ratio of the alternating sound field conversion between the medium frequency and the low frequency is 2:1 to 3:1, and the total time is 3 to 5 hours.

[0021] Preferably, in step S2, the pH range is 6.5-8.5.

[0022] Preferably, in step S5, the fracture filling body is left to stand for 2 to 3 days after the repair work is completed.

[0023] Preferably, the volume fraction of the acoustic nanoparticles is 10-30%, the initial particle size is 5 nm-100 nm, and the particle size after aggregation into microbial-induced particles is 50 μm-300 μm.

[0024] Preferably, the time for independently applying the low, medium and high frequency sound fields is 2 to 6 hours.

[0025] The beneficial effects of the present invention compared to the prior art are:

[0026] 1. The present invention improves the fluidity of non-water-based nanomaterials through the acoustic-thermal synergistic effect, promotes the uniform distribution of grouting materials, avoids the occurrence of distribution blind spots, and circumvents the problem of secondary degradation of the filling body by water-based grouting materials.

[0027] 2. The present invention utilizes a medium-frequency sound field to aggregate small-sized acoustic nanoparticles into large-sized bacterial colony-inducing particles, while providing a certain support to the grouting channel, thereby avoiding the shrinkage effect of the grouting channel caused by the creep effect under the action of the original rock stress.

[0028] 3. This invention uses acoustic and thermal fields to synergistically regulate the distribution of microbial induction particles, achieving uniform distribution of microbial flora and accelerating multi-point mineralization remediation. By recording changes in electrical signals to monitor the metabolic activity of the microbial flora, the diffusion range of the flora can be flexibly controlled, thereby enabling visual control of the diffusion process.

[0029] 4. Under the multi-stage synergistic effect of sound and heat, the present invention improves the transmission of nutrients in the cracks, promotes the proliferation of microorganisms, and provides additional metabolic substrates for microorganisms, accelerating the decomposition and mineralization of mineralized raw materials. At the same time, the sound field regulation can promote the rapid transfer of induced particles and bacterial flora, thereby accelerating the efficiency of filling repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The overall schematic diagram of the device for repairing fillings by inducing microbial nanomaterials based on the acoustic-thermal effect;

[0031] Figure 2 for Figure 1 Left view of the grouting borehole;

[0032] Figure 3 Schematic diagram of spider web-like arrangement of grouting holes;

[0033] Figure 4 is the distribution map of the sonic probe;

[0034] Figure 5 This is a schematic diagram of the lateral section of the grouting drilling arrangement and the distribution of the sonic probes;

[0035] Figure 6 This is a schematic diagram of the forward section of the grouting drilling arrangement and the distribution of the sonic probes;

[0036] Figure 7 Added penetration diagram for acoustic-thermal effect;

[0037] Figure 8 Schematic diagram of the fracture space model without filling material injected;

[0038] Figure 9 Schematic diagram of the stage where low-frequency sound field-assisted heating promotes uniform diffusion of slurry A;

[0039] Figure 10 Schematic diagram of the stages of particle generation, uniform distribution, and microbial adsorption and migration induced by medium-low frequency sound field;

[0040] Figure 11 Schematic diagram of the microbial proliferation, activation, and mineralization stages under the action of high-frequency sound field;

[0041] Figure 12 Schematic diagram of the backfill grouting drilling stage of microbial enhanced mineralization under the action of acoustic-thermal field.

[0042] In the picture:

[0043] 1. Overburden; 2. Roof; 3. Backfill; 4. Floor; 5. Grouting borehole; 6. Acoustic wave monitoring probe; 7. Information transfer and processing interface; 8. Ground monitoring center; 9. Acoustic-thermal combined control device; 901. Multi-frequency acoustic wave array; 902. Acoustic field modulation module; 903. Auxiliary heat source; 904. Multifunctional monitoring sensor; 906. Thermal surge effect; 10. Three-dimensional fracture space model; 11. Microbial storage tank; 12. Non-aqueous nanomaterial storage tank; 13. Accelerator storage tank; 14. Non-aqueous nanorepairing material A storage tank; 1401. Non-aqueous nanorepairing material A; 1403. Grouting material A solidified block; 1501. Non-aqueous nanomaterial B storage tank; 1503. Grouting material B solidified body; 16. Microbial flora; 17. Microbial-induced particles; 1701. Acoustic nanoparticles; 18. Blank area; 19. Slurry flow intersection area. DETAILED DESCRIPTION

[0044] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. The technical solutions of the present invention will be described in detail below with reference to the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0045] A device and method for repairing a fissure filling body with acoustic-thermal effect-assisted induction of non-aqueous nanomaterials containing microorganisms controls the uniform diffusion morphology of non-aqueous acoustic nanorepair materials and microbial flora through the acoustic field, eliminates repair blind spots, greatly promotes the repair efficiency of the filling body, avoids the influence of stress conditions and secondary degradation, and ultimately achieves stable bearing of the filling body.

[0046] Example 1

[0047] See also Figures 1 to 12 This embodiment proposes a device for repairing a filling body based on the acoustic-thermal effect-induced microbial nanomaterials, including a filling body 3, the bottom of the filling body 3 is a bottom plate 4, the top of the filling body 3 is a top plate 2, and there is an overlying rock layer 1 that forms a load on the top plate 2; with the middle part of the filling body 3 as the center of the grouting repair area, grouting boreholes 5 are arranged in the filling body 3 in a deep and shallow hole manner, and the grouting boreholes 5 are arranged in a diffusion circle or spider web shape on the plane, the diffusion circle spacing of the grouting boreholes 5 is 0.5~6m, and the depth of the grouting boreholes 5 is 0~1.5m near the hole fracture surface.

[0048] Among them, the grouting drilling holes are 5 deep and shallow holes set with the middle as the center. When spreading to the surrounding areas, deep and shallow holes can also be set at intervals. If necessary, flush holes can be set and adjusted according to the crack space to ensure good diffusion effect of the filling material.

[0049] Acoustic wave monitoring probes 6 are installed diagonally (in multiple rows and columns) on the filling body 3, with row and column spacing of 1 to 3 meters. Through multi-point acoustic wave monitoring, acoustic waves are emitted to conduct omnidirectional monitoring of the filling body 3 with cracks. The acoustic wave monitoring probes 6 are connected to a ground monitoring center 8 via an information relay processing interface 7. The acoustic wave monitoring data is processed to generate a three-dimensional fracture spatial model 10 of the filling body 3, accurately identifying fractures and heterogeneous regions within the filling body 3, as well as their location and size distribution. The acoustic wave monitoring probes 6 emit acoustic waves with a frequency of 1 to 100 Hz, with frequencies below 10 Hz used to detect medium and small-sized fractures. The calculated wave velocity ranges from 0 to 7000 m / s, enabling identification of the fracture spatial structure within the filling body 3.

[0050] Each grouting borehole 5 is connected to the non-aqueous nano-repairing material A storage tank 14 and the non-aqueous nano-material B storage tank 15 through a pipeline; the non-aqueous nano-repairing material A storage tank 14 is connected to the microorganism storage tank 11 and the non-aqueous nano-material storage tank 12; the non-aqueous nano-material B storage tank 15 is connected to the quick-setting agent storage tank 13, and is also connected to the non-aqueous nano-material tank 12; valves are provided on the outlet pipes of the non-aqueous nano-repairing material A storage tank 14 and the non-aqueous nano-material B tank 15; the microbial flora 16 is placed in the microbial storage tank 11, and the microbial flora 16 is selected from carbonate mineralizing bacteria, such as alkaliphilic bacteria, ammoniaphilic bacteria, etc. The microbial concentration in the mixed slurry is 10 6 ~ 10 8 CFU / mL.

[0051] The non-aqueous nanomaterial storage tank 12 contains non-aqueous nanomaterials, using organic solvents such as alcohols or ketones as carriers. These materials include acoustic nanoparticles 1701, nutrients (such as urea and sugar), and calcium nitrate or calcium sulfate. Acoustic nanoparticles 1701, such as coated nanocalcium or nanoferrite, can migrate and aggregate under the influence of an acoustic field to form microbial-inducing particles 17. The volume fraction of acoustic nanoparticles 1701 is 10-30%, with an initial particle size of 5-100 nm. After aggregation, the microbial-inducing particles 17 have a particle size of 50-300 μm. These particles not only induce microbial aggregation but also support the grouting channel. Low-frequency sound waves also stimulate heat generation, further promoting the migration of the inducing particles.

[0052] A sound-heat combination control device 9 is provided at the bottom of the grouting borehole 5;

[0053] The acoustic-thermal combined control device 9 includes four parts: a multi-frequency acoustic wave array 901, an acoustic field modulation module 902, an auxiliary heat source 903, and a multi-functional monitoring sensor 904, all of which are connected and synchronized with the ground monitoring center 8. The combination of the multi-frequency acoustic wave array 901 and the acoustic field modulation module 902 can generate low, medium, and high-frequency acoustic fields. The three acoustic field frequencies are 0.1-10kHz, 100kHz-1MHz, and 1MHz-10MHz, respectively. The acoustic fields in each stage are applied for 2-6 hours. The low-frequency acoustic field generates directional eddies to reduce the viscosity of non-water-based materials and promote the uniform distribution of nanoparticles. The medium-frequency acoustic field induces particle aggregation and adsorbs negatively charged microorganisms through electrostatic action, further ensuring the uniformity of the microorganisms. At the same time, it supports the grouting channel and resists the compression effect of in-situ stress. The high-frequency acoustic field accelerates the mineralization reaction of microorganisms and accelerates the reaction source Ca. + Ion decomposition.

[0054] The maximum temperature of the auxiliary heat source 903 is between 40℃ and 45℃, that is, the temperature difference between the injection port and the distal low-temperature crack is generated. Δ T, generating a heat surge effect 906, further promoting the fluidity of non-water-based materials; the multifunctional monitoring sensor 904 monitors multiple aspects, including particle distribution density, microbial distribution, and real-time pH value through acoustic signals and multifunctional monitoring signals. The monitoring data is synchronized with the ground monitoring center 8, and the pH setting range is 6.5~8.5. When the mineralization reaction reaches a certain level, the pH is adjusted by adding a small amount of acid (hydrochloric acid, etc.) or alkali (calcium hydroxide, etc.) externally as needed to ensure the efficient conduct of the microbial mineralization reaction.

[0055] The multi-frequency sound wave array 901 and the sound field modulation module 902 coordinately adjust the sound field intensity. In the process of microbial-induced particle aggregation in the medium-frequency sound field, the "aggregation-dispersion" process can be circulated in complex cracks through alternating cycles. 中频 :h 低频 =2:1~3:1, (h is time); a total of 3~5 hours, gradually optimize the distribution until the ground monitoring center 8 presents an image showing that the density point size and area are basically stable.

[0056] The medium-high frequency sound field of 1~10MHz stimulates the local heating of acoustic nanoparticles 1701, accelerating the urea and mineralization reaction source Ca in non-aqueous materials. + The decomposition of minerals stimulates the activity of microorganisms and promotes efficient repair. The following is the relevant mineralization reaction formula:

[0057]

[0058] Example 2

[0059] This embodiment proposes a method for repairing a filling body by inducing microbial nanomaterials based on the acoustic-thermal effect. The repair object is a filling body 3 of a key load-bearing damaged cube with a height of 5m, a length of 5m and a width of 5m; the bottom of the filling body 3 is a bottom plate 4, the top of the filling body 3 is a top plate 2, and there is an overlying rock layer 1 on the top plate 2 that forms a load; based on the device for repairing a filling body by inducing microbial nanomaterials based on the acoustic-thermal effect described in Example 1.

[0060] See also Figure 1 、 Figure 2 、 Figures 4 to 12 The specific implementation steps are:

[0061] S1. Set up 3×3 acoustic wave monitoring probes 6 on both sides of the filling body 3, with a row and column spacing of 2m. Use multi-point acoustic wave monitoring to emit acoustic waves to conduct all-round monitoring of the filling body 3 with cracks. The acoustic wave monitoring probes 6 are connected to the ground monitoring center 8 through the information transfer processing interface 7. The acoustic wave monitoring data can be processed to generate a three-dimensional crack space model 10 of the filling body 3, and identify that the cracks and inhomogeneous areas in the filling body 3 are basically located in the 3m×4m×4m area in the middle of the filling body 3.

[0062] S2. With the middle of the filling body 3 as the center of the grouting repair area, the filling body 3 is drilled using a deep and shallow hole arrangement. The drill holes are arranged in a diffusion circle on the plane (see Figure 2). The distance between two adjacent grouting boreholes 5 in the diffusion circle is 2 meters; the deepest grouting borehole 5 (i.e., the borehole located at the center of the diffusion circle) is located 0.5 meters deep from the hole fracture surface, and the shallowest grouting borehole 5 (i.e., the borehole located on the outermost circle of the diffusion circle) is located 0.5 meters shallow from the hole fracture surface;

[0063] Connect all grouting boreholes 5 to the non-aqueous nano-repairing material A storage tank 14 via pipelines. The non-aqueous nano-repairing material A storage tank 14 is connected to the microbial storage tank 11 and the non-aqueous nano-repairing material storage tank 12, respectively. Open the valve at the outlet of the non-aqueous nano-repairing material A storage tank 14 and inject the non-aqueous nano-repairing material A 1401 containing the microbial flora 16 into the filling body 3 through each grouting borehole 5.

[0064] S3. Activate the acoustic-thermal combination control device 9 at the bottom of the grouting borehole 5, modulating the low-frequency acoustic field at 80 kHz. Simultaneously, activate the auxiliary heat source 903, set at 40°C for 3 hours, to promote the flow and diffusion of the non-aqueous nano-repairing material A1401. Acoustic field change data is synchronized to the ground monitoring center 8 for monitoring until the non-aqueous nano-repairing material A1401 is evenly distributed within the image area of ​​the three-dimensional fracture spatial model 10 and the image of the non-aqueous nano-repairing material A1401 flow substantially covers the image of the three-dimensional fracture spatial model 10, i.e., the slurry flow intersection area 19 gradually replaces the blank area 18 in the fracture. Simultaneously, deactivate the auxiliary heat source 903, and activate the multi-function monitoring sensor 904 to monitor the pH value at the bottom of each grouting borehole 5 in real time, ensuring that the pH value fluctuates between 7 and 8.

[0065] S4. By adjusting the multi-frequency acoustic wave array 901 and the acoustic field modulation module 902, a 2-hour medium-frequency acoustic field at 500 kHz is applied. This medium-frequency acoustic wave promotes the aggregation of acoustic nanoparticles 1701 in the non-aqueous nanorepair material A1401, forming microbial-inducing particles 17. Once the microbial-inducing particles 17 have gradually formed, the acoustic field is alternating between 30 minutes of medium frequency and 15 minutes of low frequency for a total of 3 hours to achieve uniform distribution of the microbial-inducing particles 17. Simultaneously, the multi-function monitoring sensor 904 monitors the movement of the microbial flora 16 until the flora density is relatively uniform.

[0066] S5. Adjust the multi-frequency acoustic wave array 901 and the acoustic field modulation module 902 again, set the high-frequency acoustic field with a frequency of 3 MHz to promote the further growth of the number of microbial flora 16 in the non-aqueous nano-repair material A1401, and increase the repair activity of the flora. When the repair of holes and cracks is basically completed, synchronously control the ground monitoring center 8 to connect the multi-function monitoring sensor 904 to monitor the changes in the microbial distribution area. When the distribution area of ​​the microbial flora 16 gradually decreases until it disappears, the repair work of the fracture filling body is completed, and it is left to stand for 2 days to form a solidified block 1403 of grouting material A.

[0067] S6. Backfill the grouting borehole 5 through the non-aqueous nanomaterial B storage tank 1501, wait for it to stand for 1 day to completely generate the grouting material B solidified body 1503, and then use the acoustic wave monitoring probe 6 to conduct all-round monitoring of the repaired filling body 3 again. The maximum difference in the initial hole crack space and the surrounding area after repair is found to be 100 m / s, and the repair work is completed.

[0068] In addition to the crack space repair area and the surrounding area, the j×k×l matrix points are selected and the wave velocity of each point is monitored in real time. v 111 、…、 v jkl, the two-dimensional and three-dimensional cloud maps can be constructed through the location point values, and the maximum difference in the area Δ v = v max - v min , the difference range is 0~100 m / s, which proves that the wave velocity cloud map is relatively uniform and the repair effect is good.

[0069] Example 3

[0070] This embodiment proposes a method for repairing a filling body by inducing microbial nanomaterials based on the acoustic-thermal effect. The repair object is a non-cubic filling body 3 with a key load-bearing damage that is 6 m high, 11 m long, and 12 m wide. The bottom of the filling body 3 is a base plate 4, and the top of the filling body 3 is a top plate 2. There is an overlying rock layer 1 on the top plate 2 that forms a load; based on the device for repairing a filling body by inducing microbial nanomaterials based on the acoustic-thermal effect described in Example 1.

[0071] See also Figure 1 、 Figures 3 to 12 , the specific implementation steps are:

[0072] S1. Along the length direction, 4×2 rows of acoustic wave monitoring probes 6 are set on both sides of the filling body 3, with a row-to-row spacing of 3×2.5m. Multi-point acoustic wave monitoring is used to emit acoustic waves to conduct all-round monitoring of the filling body 3 with cracks. The acoustic wave monitoring probes 6 are connected to the ground monitoring center 8 through the information transfer processing interface 7. The acoustic wave monitoring data can be processed to generate a three-dimensional crack space model 10 of the filling body 3, thereby identifying cracks and inhomogeneous areas within the filling body 3.

[0073] S2, with the middle of the filling body 3 as the center of the grouting repair area, the filling body 3 is drilled by arranging deep and shallow holes. The holes are arranged in a spider web pattern on the plane (see Figure 3 ), the spacing between the grouting boreholes 5 is about 3m, the deepest grouting borehole 5 is located 1m deep from the hole fracture surface, and the shallowest grouting borehole 5 is located 1m shallow from the hole fracture surface;

[0074] Connect all grouting boreholes 5 to the non-aqueous nano-repairing material A storage tank 14 via pipelines. The non-aqueous nano-repairing material A storage tank 14 is connected to the microbial storage tank 11 and the non-aqueous nano-repairing material storage tank 12, respectively. Open the valve at the outlet of the non-aqueous nano-repairing material A storage tank 14 and inject the non-aqueous nano-repairing material A 1401 containing the microbial flora 16 into the filling body 3 through each grouting borehole 5.

[0075] S3. Activate the acoustic-thermal combination control device 9 at the bottom of the grouting borehole 5, modulating the low-frequency acoustic field at a frequency of 50 kHz. Simultaneously, activate the auxiliary heat source 903, set at 45°C for a duration of 4 hours, to promote the flow and diffusion of the non-aqueous nano-repairing material A1401. Acoustic field change data is synchronized to the ground monitoring center 8 for monitoring until the non-aqueous nano-repairing material A1401 is evenly distributed within the image area of ​​the three-dimensional fracture spatial model 10 and the image of the non-aqueous nano-repairing material A1401 flow substantially covers the image of the three-dimensional fracture spatial model 10, i.e., the slurry flow intersection area 19 gradually replaces the blank area 18 in the fracture. Simultaneously, deactivate the auxiliary heat source 903, and activate the multi-function monitoring sensor 904 to monitor the pH value at the bottom of each grouting borehole 5 in real time, ensuring that the pH value fluctuates between 7 and 8.

[0076] S4. By adjusting the multi-frequency acoustic wave array 901 and the acoustic field modulation module 902, a 2-hour medium-frequency acoustic field at a frequency of 100 kHz is applied. This medium-frequency acoustic wave promotes the aggregation of acoustic nanoparticles 1701 in the non-aqueous nanorepair material A1401, forming microbial-inducing particles 17. Once the microbial-inducing particles 17 have gradually formed, the acoustic field is alternating between 30 minutes of medium frequency and 15 minutes of low frequency for a total of 4 hours to achieve uniform distribution of the microbial-inducing particles 17. Simultaneously, the multi-function monitoring sensor 904 monitors the movement of the microbial flora 16 until the flora density is relatively uniform.

[0077] S5. Adjust the multi-frequency acoustic wave array 901 and the acoustic field modulation module 902 again, set the high-frequency acoustic field with a frequency of 3.5 MHz to promote the further growth of the number of microbial flora 16 in the non-aqueous nano-repair material A1401, and increase the repair activity of the flora. When the repair of holes and cracks is basically completed, synchronously control the ground monitoring center 8 to connect the multi-function monitoring sensor 904 to monitor the changes in the microbial distribution area. When the distribution area of ​​the microbial flora 16 gradually decreases until it disappears, the repair work of the fracture filling body is completed, and it is left to stand for 2 days to form a solidified block 1403 of grouting material A.

[0078] S6. Backfill the grouting borehole 5 through the non-aqueous nanomaterial B storage tank 1501, wait for it to stand for 1 day to completely generate the grouting material B solidified body 1503, and then use the acoustic wave monitoring probe 6 to conduct all-round monitoring of the repaired filling body 3 again. The maximum difference in the initial hole crack space and the surrounding area after repair is found to be 100 m / s, and the repair work is completed.

[0079] The above content is a further detailed description of the present invention in combination with a specific preferred embodiment. It cannot be considered that the specific embodiments of the present invention are limited to this. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the present invention, which should be regarded as belonging to the scope of patent protection determined by the submitted claims of the present invention.

Claims

1. A device for repairing a filling body by inducing microbial nanomaterials based on the acoustic-thermal effect, comprising a filling body (3), the bottom of the filling body (3) being a bottom plate (4), the top of the filling body (3) being a top plate (2), and an overlying rock layer (1) forming a load on the top plate (2); characterized in that: The middle of the filling body (3) is used as the center of the grouting repair area, and grouting boreholes (5) are arranged in the filling body (3) in the form of deep and shallow holes; the grouting boreholes (5) are arranged in a diffusion circle or spider web-like distribution on the plane; acoustic wave monitoring probes (6) are evenly distributed on the filling body (3); each grouting borehole (5) is connected to the non-aqueous nano-repairing material A storage tank (14) and the non-aqueous nano-repairing material B storage tank (15) through a pipeline; the non-aqueous nano-repairing material A storage tank (14) is connected to the microorganism storage tank (11) and the non-aqueous nano-material storage tank (12); the non-aqueous nano-material B storage tank (15) is connected to the quick-setting agent storage tank (13), and is also connected to the non-aqueous nano-material storage tank (12); valves are provided on the outlet pipelines of the non-aqueous nano-repairing material A storage tank (14) and the non-aqueous nano-material B storage tank (15); The non-aqueous nano-repair material A storage tank (14) is used to input the non-aqueous nano-material mixed with microbial flora (16) into the grouting borehole (5); the non-aqueous nano-material B storage tank (15) is used to input the non-aqueous nano-material mixed with a quick-setting agent into the grouting borehole (5); the non-aqueous nano-material contains acoustic nano-particles (1701); An acoustic-thermal combination control device (9) is provided at the bottom of the grouting borehole (5); the acoustic-thermal combination control device (9) comprises a multi-frequency acoustic wave array (901), an acoustic field modulation module (902), an auxiliary heat source (903), and a multifunctional monitoring sensor (904); the multi-frequency acoustic wave array (901) and the acoustic field modulation module (902) are combined to generate low, medium, and high frequency acoustic fields for promoting uniform distribution of acoustic nanoparticles (1701) and accelerating microbial mineralization reactions; the auxiliary heat source (903) is used to promote the fluidity of non-aqueous nanomaterials; The acoustic wave monitoring probe (6) is connected to the ground monitoring center (8) via the information transfer processing interface (7) to process the acoustic wave monitoring data for generating a three-dimensional fracture space model (10) of the filling body (3).

2. A method for repairing a filling body using microbial nanomaterials induced by acoustic-thermal effects, characterized in that: The device for repairing a filling body using microbial nanomaterials induced by the acoustic-thermal effect as claimed in claim 1 comprises the following steps: S1. Open the valve at the outlet of the non-aqueous nano-repairing material A storage tank (14), and inject the non-aqueous nano-repairing material A (1401) containing the microbial flora (16) into the filling body (3) through each grouting borehole (5); S2. Turn on the acoustic-thermal combination control device (9) at the bottom of the grouting borehole (5), apply a low-frequency acoustic field with a frequency of 0.1 to 10 kHz, and simultaneously turn on the auxiliary heat source (903), whose temperature is set at 40°C to 45°C, to promote the flow and diffusion of the non-aqueous nano-repairing material A (1401). The acoustic field change data is synchronized to the ground monitoring center (8) for monitoring until the non-aqueous nano-repairing material A (1401) is evenly distributed in the imaging area of ​​the three-dimensional crack space model (10), and the flow imaging of the non-aqueous nano-repairing material A (1401) covers the imaging of the three-dimensional crack space model (10). Then, the auxiliary heat source (903) is turned off simultaneously, and the multifunctional monitoring sensor (904) is turned on to monitor the pH value at the bottom of each grouting borehole (5); S3. By adjusting the multi-frequency acoustic wave array (901) and the acoustic field modulation module (902), a medium-frequency acoustic field is applied with a frequency of 100kHz~1MHz. Under the action of the medium-frequency acoustic wave, the acoustic nanoparticles (1701) of the non-aqueous nano-repair material A (1401) begin to aggregate to form microbial-induced particles (17); then, the acoustic field is alternately converted with the medium frequency and the low frequency to achieve uniform distribution of the microbial-induced particles (17); and the migration of the microbial flora (16) is simultaneously monitored by the multifunctional monitoring sensor (904) until the flora density is uniform. S5. Adjust the multi-frequency acoustic wave array (901) and the acoustic field modulation module (902) again, set the high-frequency acoustic field with a frequency of 1 MHz to 10 MHz to promote the further growth of the number of microbial flora (16) in the non-aqueous nano-repair material A (1401), and increase the repair activity of the flora. Synchronously control the ground monitoring center (8) to connect the multi-function monitoring sensor (904) to monitor the changes in the microbial distribution area. When the distribution area of ​​the microbial flora (16) gradually decreases until it disappears, the repair work of the fissure filling body is completed. S6. Open the non-aqueous nanomaterial B storage tank (15), backfill the grouting borehole (5) with the non-aqueous nanomaterial B (1501), and completely generate a solidified body of the grouting material B (1503).

3. The method for repairing a filling body using microbial nanomaterials induced by acoustic-thermal effect according to claim 2, characterized in that: The time ratio of alternating sound field conversion between medium frequency and low frequency is 2:1~3:1; the total time is 3~5 hours.

4. The method for repairing a filling body using microbial nanomaterials induced by acoustic-thermal effect according to claim 2, characterized in that: In step S2, the pH range is 6.5-8.

5.

5. The method for repairing a filling body using microbial nanomaterials induced by acoustic-thermal effect according to claim 2, characterized in that: In step S5, after the repair work of the fissure filling body is completed, it is left to stand for 2 to 3 days.

6. The method for repairing a filling body using microbial nanomaterials induced by acoustic-thermal effect according to claim 2, characterized in that: The volume fraction of acoustic nanoparticles (1701) is 10-30%, the initial particle size is 5nm-100nm, and the particle size after aggregation into microbial induced particles (17) is 50um-300um.

7. The method for repairing a filling body using microbial nanomaterials induced by acoustic-thermal effect according to claim 2, characterized in that: The low, medium and high frequency sound fields are applied independently for 2 to 6 hours.

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