CN214365993U - Utilize multistage shutoff surrounding rock crack water of thick liquid and microbial mineralization device - Google Patents
Utilize multistage shutoff surrounding rock crack water of thick liquid and microbial mineralization device Download PDFInfo
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- CN214365993U CN214365993U CN202120312208.2U CN202120312208U CN214365993U CN 214365993 U CN214365993 U CN 214365993U CN 202120312208 U CN202120312208 U CN 202120312208U CN 214365993 U CN214365993 U CN 214365993U
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Abstract
The utility model belongs to the technical field of the underground works shutoff, specifically disclose a utilize multistage shutoff surrounding rock crack water of thick liquid and microorganism mineralization device, the device adopts the microorganism dry powder to induce its calcium carbonate deposit that generates to have cementitious nature after the activation with shutoff rock stratum crack, the flow of control crack water and reinforcing surrounding rock stability, constitute by annular stagnant water curtain shutoff and key hole slip casting shutoff, annular stagnant water curtain is circular evenly distributed in the key hole periphery, reduce the velocity of flow and the flow of crack water through pouring into cement-water glass thick liquid into annular slip casting hole, and the elementary shutoff of centimetre level surrounding rock crack is carried out; the key hole grouting plugging adopts coarse aggregate and calcium carbonate precipitation induced by microorganisms to implement secondary plugging on millimeter-scale cracks in surrounding rock cracks, and adopts microorganism dry powder to induce calcium carbonate precipitation to plug micron-scale cracks in the surrounding rock after activation so as to implement tertiary plugging, thereby gradually enhancing the plugging effect of the surrounding rock cracks and the curing effect of the surrounding rock.
Description
Technical Field
The utility model belongs to the technical field of the underground works shutoff, especially, relate to an utilize device of multistage shutoff country rock crack water of thick liquid and microorganism mineralization.
Background
China is wide in territory and complex in geological conditions, and unfavorable geological conditions such as water-rich karst fractures, water diversion fault fracture breakage and the like are frequently encountered in the underground engineering construction process and are the root causes of sudden water burst disasters. Sudden water burst in underground engineering is a common construction disaster, which causes a delay of construction period if the sudden water burst is light and causes casualties if the sudden water burst is heavy, thereby causing serious economic loss.
In the tunnel construction process, in order to solve the sudden water gushing disaster caused by the fracture water, the current main treatment mode is grouting plugging, and the method can be divided into the following steps according to the properties of grouting materials: cement-based slurry grouting and chemical slurry grouting are mainly adopted, and cement slurry grouting and cement-water glass grouting are adopted for cement-based slurry grouting, but the plugging effect is poor due to the fact that the cement-based slurry grouting is high in viscosity and difficult to flow in tiny cracks; the chemical grout grouting mainly adopts polyurethane grouting, urea-formaldehyde resin grouting and the like, and can cause pollution to underground water and harm to the environment. In recent years, improvement of the surrounding rock structure by microorganisms has been receiving attention. The microorganism is popular because of the characteristics of good fluidity, strong permeability, low viscosity, no pollution, large curing radius, good plugging effect on tiny cracks in the surrounding rock and the like. In the grouting mode, grouting plugging mainly adopts single drilling grouting plugging, and the plugging effect on large-flow and large-range fracture water is poor.
In order to improve the softness of the surrounding rock of the wall of the drill hole, the cracks around the surrounding rock of the wall of the drill hole are sealed and solidified, and the curing and pore-forming method for the coal rock layer containing the weak structure (CN 106837237B) adopts sarcina pasteurianthi to induce the sarcina pasteurianthi to generate calcium carbonate crystals in the pores and cracks of the weak coal rock layer around the drill hole, thereby improving the softness of the surrounding rock of the wall of the drill hole. However, the method is mainly used for plugging the cracks around the drill hole, is not suitable for plugging the crack water in the multi-scale cracks, is high in crack water flow rate in the large-scale cracks, is not suitable for microbial mineralization and is poor in plugging effect on the crack water. A construction method for underwater grouting of an anti-floating anchor rod rich in underground water for bed rock fracture development (CN 107630452A) adopts grouting plugging to plug the underground water for bed rock fracture development. However, the method adopts a single drilling hole for grouting plugging, the plugging range is small, and small-scale and micro-scale cracks cannot be plugged effectively due to the large particle size and high viscosity of the slurry. But also is not suitable for plugging large-flow fracture water.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an utilize device of multistage shutoff country rock crack water of thick liquid and microorganism mineralization, utilize microorganism dry powder to precipitate through induced calcium carbonate after the activation, adopt annular stagnant water curtain shutoff and key slip casting hole slip casting shutoff to implement tertiary shutoff, realize the solidification of effective shutoff and the country rock of country rock crack water, reduce the gushing water disaster among the underground works work progress.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
a device for mineralizing and multistage plugging of surrounding rock fracture water by using slurry and microorganisms comprises a first plugging component arranged in a key grouting hole and a second plugging component respectively arranged in an annular water-stop curtain water-stop drilling hole, wherein the annular water-stop curtain comprises six annular water-stop drilling holes which are uniformly and radially arranged by taking the key grouting hole as a circle center and taking a distance of 0.8-1.5 m as a radius, the first plugging component comprises an anchor rod positioned at the center of the key grouting hole and a first drilling hole plugging plug positioned at the key grouting hole opening at the end part of the anchor rod, a first grouting pipeline channel and a third grouting pipeline are arranged on a drilling plugging plug, the first grouting pipeline and the third grouting pipeline respectively extend inwards to the bottom of the key grouting hole through the channels, the second plugging component comprises a second drilling hole plugging plug positioned at the end part of each water-stop drilling hole, and a second grouting pipeline is arranged on the second drilling plugging plug, and the second grouting pipeline extends inwards to the bottom of the water stopping drill hole through the second grouting pipeline.
Furthermore, a slurry return pipe is further arranged on the first drilling plugging plug, and the bottom of the slurry return pipe penetrates through the first drilling plugging plug body.
Furthermore, the end part of the grouting pipeline I, which extends out of the first drilling hole blocking block, is provided with two branch pipelines, namely a branch pipeline I and a branch pipeline II, the end parts of the branch pipeline I and the branch pipeline II are fixedly connected with the hydraulic duplex pump respectively, and the branch pipeline I and the branch pipeline II are provided with a flow meter and a gate valve respectively.
Furthermore, a slurry pump and an overflow valve are arranged on the end part pipeline of the third bacteria injection liquid pipeline, which extends out of the first drilling hole and is blocked.
Furthermore, a slurry pump and an overflow valve are also arranged on the end part pipeline of the second grouting pipeline, which extends out of the second drilling hole for blocking.
A method for plugging by using a device for plugging surrounding rock fracture water in a multistage manner by using slurry and microbial mineralization comprises the following steps:
(1) injecting a mixture of cement and water glass into the annular waterproof curtain waterproof drill hole for plugging through a slurry pump through a second grouting pipeline, and primarily plugging centimeter-level surrounding rock cracks;
(2) performing secondary plugging on millimeter-sized fractures in the surrounding rock fractures by adopting coarse aggregates and calcium carbonate precipitation induced by microorganisms;
(3) and performing induced precipitation of calcium carbonate by using the activated microorganism dry powder to block micron-sized cracks in the surrounding rock so as to implement three-level blocking.
Further, the specific operation of the step (1) comprises the following steps:
a. drilling by using a drilling machine, wherein the aperture is 90mm, stopping drilling and withdrawing drilling when drilling to be within a surrounding rock plastic zone, such as five meters, and arranging an anchor rod in the drilling hole;
b. a second drilling hole is used for plugging the water stopping drilling hole, and a grouting pipeline II is preset during hole sealing;
c. starting a slurry pump, performing grouting operation, and injecting cement-water glass slurry into the water stop drill hole;
d. setting the final grouting pressure to be 3MPa, and stopping grouting when the grouting pressure reaches 3MPa or an overflow valve has a slurry leakage phenomenon;
e. and repeating the above operation steps to realize six times of drilling, wherein the hole spacing of the drilled holes is 1.0m, and the drilled holes are circularly and uniformly distributed around the key grouting holes.
Furthermore, the cement-water glass slurry adopts a traditional proportioning scheme. The volume ratio of the cement paste to the water glass is 1: 0.5; cement paste water cement ratio 1: 1; water glass concentration Be' = 35; water glass modulus M = 2.8.
Further, the specific operation of the step (3) comprises the following steps:
a. drilling a key grouting hole by using a drilling machine, wherein the hole diameter is 110mm, drilling the key grouting hole to be within a surrounding rock plastic region, stopping drilling and withdrawing drilling when the hole diameter is within five meters, and arranging an anchor rod in the key grouting hole;
b. blocking the drill hole of the grouting hole by adopting a first drill hole, and presetting a first grouting pipeline and a third grouting liquid pipeline during hole sealing;
c. adding water into the dry powder of the microorganism sarcina pasteurianum for activation to prepare the OD with the concentration6002.0 bacteria solution, and placing in a greenhouse at 30 ℃ for 12 hours;
d. adding coal powder into a solid-liquid two-phase mixture of bacterial liquid and coarse aggregate, mixing the coal powder and the coarse aggregate until suspension is injected into a key grouting hole through a slurry pump, wherein the volume ratio of the coal powder to the suspension is bacterial liquid: coarse aggregate: the coal powder is 10: 1: 2;
e. the hydraulic duplex pump is started, and CaCl is introduced through a control branch-gate valve2After 5-10 hours, the slurry pump is closed, the gate valve is controlled to feed the urea solution through the branch line two for 5 hours, so that the urea and the CaCl are mixed2Mixing the solution into a gelling liquid for plugging;
f. and (e) opening a gate valve of the slurry return pipe to enable waste liquid to flow out, and repeating the steps e-f until the grouting pressure of the key grouting hole reaches 3MPa or the slurry leakage phenomenon of the overflow valve occurs, and stopping grouting.
Further, the coarse aggregate is quartz sand or river sand, when the opening of a rock mass crack is 1-3 mm, the particle size of the coarse aggregate is 14 meshes, 16% -20%, 18 meshes, 25% -30% and 20 meshes, and 40% -60%; when the opening of the rock mass crack is larger than 3mm, the grain diameter of the coarse aggregate accounts for 10% -15% of 12 meshes, 20% -25% of 14 meshes, 25% -30% of 18 meshes and 35% -40% of 20 meshes; the stationary liquid is CaCl2The concentration of the solution is 0.3 mol/L; the gelling liquid is CaCl2And urea, said CaCl2The concentration of the solution is the same as that of the urea solution, and is 0.3mol/L, and the volume ratio is 1: 1; the bacterial liquid and CaCl2The flow rate of the urea solution is 1-25L/min.
The utility model has the advantages that:
1. the utility model discloses an induced calcium carbonate of microorganism deposits, and microorganism fungus liquid and cementing liquid viscosity are low, mobility is good, the permeability is strong, the solidification radius is big, and is effectual to the shutoff of small crack in the country rock, and when the rock stratum lithology is the carbonate rock, is rich in Ca in its country rock2+The rock water can improve the flocculation effect of calcium carbonate; ca in rock stratum water by using ionic membrane2+The concentration of (2) is increased to 1mol/L, so that the precipitation effect of the microorganisms is enhanced;
2. the utility model discloses an induced calcium carbonate precipitation's behind the microorganism dry powder activation treatment formation carries out the shutoff of small crack, and convenient on-the-spot application reduces the microorganism and cultivates the cost, adopts the mode that fungus liquid and stationary liquid and gel poured into simultaneously, compares with the mode that microorganism-stationary liquid-gel were poured into step by step to the successive layer: the utility model obviously shortens the fixing and flocculating time of the microorganism, which is 0.42 times of the time of the microorganism; the utility model obviously improves the exposed area of the microorganism, which is 6.3 times of that of the microorganism;
3. the utility model utilizes the annular curtain to plug centimeter-level surrounding rock cracks, adopts coarse aggregate to plug millimeter-level cracks, and then uses the microorganism to induce the calcium carbonate precipitation to plug micron-level cracks, thereby gradually enhancing the plugging effect of the surrounding rock cracks;
4. the added coarse aggregate can be retained in a larger crack, blocks a water guide channel, slows down water flow, provides a place for attached flocculation of microorganisms, obviously improves the exposure area of the microorganisms, and is 6.3 times of the continuous step-by-step injection of the microorganisms;
5. the utility model can increase the concentration of calcium ions in rock water in surrounding rocks by the ionic membrane in the process of microorganism-induced calcium carbonate precipitation so as to enhance the flocculation of calcium carbonate;
6. the utility model adopts the mode of injecting the bacteria liquid, the stationary liquid and the gelling liquid simultaneously, which obviously shortens the time of fixing and flocculating the microorganism and is 0.42 times of the time of continuously injecting the microorganism, the stationary liquid and the gelling liquid step by step;
7. the utility model discloses an annular stagnant water curtain shutoff and coarse aggregate combine together, have improved the retention rate of fungus liquid and thick liquid, have strengthened the shutoff effect and the solidification effect in country rock crack.
Drawings
FIG. 1 is a schematic diagram of a system apparatus according to the present invention;
FIG. 2 is a schematic diagram of a peripheral device of a key grouting hole grouting plugging structure;
FIG. 3 is a schematic diagram of a peripheral device of an annular waterproof curtain blocking structure;
FIG. 4 is a schematic diagram showing the relative positions of the key grouting holes and the annular curtain.
1. A surrounding rock structure; 2. surrounding rock fractures; 3. key grouting holes; 4. water stopping and drilling; 5. an anchor rod; 6. the first drilling hole is blocked; 7. grouting a second pipeline; 8. grouting a first pipeline; 9. injecting a bacterium liquid pipeline III; 10. a pulp returning pipe; 11. a pressure gauge; 12. a slurry pump; 13. an overflow valve; 14. a flow meter; 15. the second drilling hole is blocked; 16. a gate valve; 17. a hydraulic twin pump.
Detailed Description
As shown in the figure, the device for mineralizing and multistage plugging of surrounding rock fracture water by using slurry and microorganisms comprises a first plugging component arranged in a key grouting hole 3 and second plugging components respectively arranged in annular water-stop curtain water-stop drill holes 4, wherein the annular water-stop curtain comprises six annular water-stop drill holes 4 which are uniformly and radially arranged by taking the key grouting hole 3 as a circle center and taking a distance of 0.8-1.5 m as a radius, the first plugging component comprises an anchor rod 5 positioned at the center of the key grouting hole 3 and a first drill hole plugging plug 6 positioned at the hole part of the key grouting hole 3 at the end part of the anchor rod 5, a first grouting pipeline 8 channel and a third grouting liquid pipeline 9 channel are arranged on the first drill hole plugging plug 6, the first grouting pipeline 8 and the third grouting liquid pipeline 9 extend inwards to the bottom of the key grouting hole 3 through the channels respectively, the second plugging component comprises a second drill hole plugging plug 15 positioned at the end part of each water-stop drill hole 4, a second grouting pipeline 7 channel is arranged on the second drilling hole sealing plug 15, the second grouting pipeline 7 extends inwards to the bottom of the water stopping drilling hole through the grouting pipeline, a slurry returning pipe 10 is further arranged on the first drilling hole sealing plug 6, and the bottom of the slurry returning pipe 10 penetrates through the body of the first drilling hole sealing plug 6; the end part of the grouting pipeline I8 extending out of the first drilling hole sealing plug 6 is provided with two branch pipelines which are respectively a branch I and a branch II, the end parts of the branch I and the branch II are respectively fixedly connected with a hydraulic duplex pump 17, and the branch I and the branch II are respectively provided with a flow meter 14 and a gate valve 15; a slurry pump 12 and an overflow valve 13 are arranged on the end part pipeline of the third bacteria injection liquid pipeline 9 extending out of the first drilling hole blocking block 6; a slurry pump 12 and an overflow valve 13 are also arranged on the end part pipeline of the grouting pipeline II 7 extending out of the second drilling hole plugging plug 1, and the device carries out plugging of fracture water and solidification of surrounding rocks by combining plugging of the key grouting hole 3 and plugging of the annular waterproof curtain 4;
the annular waterproof curtain plug consists of six waterproof drill holes, the hole spacing is 1.0m, the hole diameter is 90mm, and the waterproof curtain plug is circularly and uniformly distributed around the key grouting holes; the annular waterproof curtain plug plugs the orifice of the anchor rod 5 through a wooden plug, and a grouting pipeline II 7 is preset during sealing and used for introducing cement-water glass for grouting plugging and is pressed out by a mud pump 18; a gate valve of the slurry return pipe 10 is opened to enable waste liquid to flow out, so that the primary crack is prevented from expanding; the device is provided with an overflow valve 13 in each pipeline, the grouting final pressure is set to be 3MPa, and grouting is stopped when the grouting pressure reaches 3MPa or the overflow valve has a slurry leakage phenomenon.
The key grouting hole 3 comprises an anchor rod 5 orifice, and two pipelines are preset when a wooden plug is used for plugging the orifice; the third injection bacteria liquid pipeline 9 is used for injecting a solid-liquid two-phase mixture of bacteria liquid and coarse aggregate, and the first injection grouting pipeline 8 is used for introducing CaCl with the concentration of 0.3mol/L2Mixing the solution with 0.3mol/L urea solution to generate stationary liquid and gel liquid; a first grouting pipeline 8 is connected with two branch pipes, and one branch pipe is used for introducing 0.3mol/L CaCl2The other branch pipe is used for introducing 0.3mol/L urea solution, when the stationary liquid is required to be introduced, the gelled liquid pipeline gate valve 16 is in a closed state, and 0.3mol/L CaCl is independently input into the branch pipe2The solution is stationary liquid; when the gelled fluid needs to be input, the gate valves of the two branch pipes are both in an open state, and 0.3mol/L CaCl is introduced into the branch pipes2And (3) introducing 0.3mol/L urea solution into the other branch pipe while the solution is dissolved, and fully mixing the two solutions in the first grouting pipeline (8) to obtain the gel.
In the grouting plugging of the key grouting hole, a solid-liquid two-phase mixture of a bacterial liquid and a coarse aggregate and a stationary liquid need to be introduced in the first step, and at the moment, the gate valve 16 needs to be opened and the slurry pump 12 and the hydraulic duplex pump 17 need to be started; and in the second step, the gelling liquid needs to be intermittently introduced, the gate valve 17 is opened at the moment, the slurry pump 12 is closed, the plugging of the key grouting hole can be realized by repeating the intermittent layered plugging for multiple times, the gap duration is 5-10 hours, the injection time is 5 hours, the final grouting pressure is set to be 3MPa, and the grouting is stopped when the grouting pressure reaches 3MPa or the overflow valve has a slurry leakage phenomenon.
A method for plugging by using a device for plugging surrounding rock fracture water in a multistage manner by using slurry and microbial mineralization comprises the following steps:
(1) injecting a mixture of cement and water glass into the annular waterproof curtain waterproof drill hole for plugging through a slurry pump through a second grouting pipeline, and primarily plugging centimeter-level surrounding rock cracks;
(2) performing secondary plugging on millimeter-sized fractures in the surrounding rock fractures by adopting coarse aggregates and calcium carbonate precipitation induced by microorganisms;
(3) and performing induced precipitation of calcium carbonate by using the activated microorganism dry powder to block micron-sized cracks in the surrounding rock so as to implement three-level blocking.
The annular curtain plugging comprises the following steps:
a. drilling by using a drilling machine, wherein the aperture is 90mm, stopping drilling and withdrawing drilling when drilling to be within a surrounding rock plastic zone, such as five meters, and arranging an anchor rod in the drilling hole;
b. a second drilling hole is used for plugging the water stopping drilling hole, and a grouting pipeline II is preset during hole sealing;
c. starting a slurry pump, performing grouting operation, and injecting cement-water glass slurry into the water stop drill hole;
d. setting the final grouting pressure to be 3MPa, and stopping grouting when the grouting pressure reaches 3MPa or an overflow valve has a slurry leakage phenomenon;
e. and repeating the above operation steps to realize six times of drilling, wherein the hole spacing of the drilled holes is 1.0m, and the drilled holes are circularly and uniformly distributed around the key grouting holes.
The key grouting hole plugging method comprises the following steps:
a. drilling a key grouting hole by using a drilling machine, wherein the hole diameter is 110mm, drilling the key grouting hole to be within a surrounding rock plastic region, stopping drilling and withdrawing drilling when the hole diameter is within five meters, and arranging an anchor rod in the key grouting hole;
b. blocking the drill hole of the grouting hole by adopting a first drill hole, and presetting a grouting pipeline I and a bacteria injection liquid pipeline III during hole sealing;
c. adding water into the dry powder of the microorganism sarcina pasteurianum for activation to prepare the OD with the concentration6002.0 bacteria solution, and placing in a greenhouse at 30 ℃ for 12 hours;
d. adding coal powder into a solid-liquid two-phase mixture of bacterial liquid and coarse aggregate, mixing the coal powder and the coarse aggregate until suspension is injected into a key grouting hole through a slurry pump, wherein the volume ratio of the coal powder to the suspension is bacterial liquid: coarse aggregate: the coal powder is 10: 1: 2;
e. opening hydraulic pressure typeA duplex pump, which is connected with CaCl by controlling a branch and a gate valve2After 5-10 hours, the slurry pump is closed, the gate valve is controlled to feed the urea solution through the branch line two for 5 hours, so that the urea and the CaCl are mixed2Mixing the solution into a gelling liquid for plugging;
f. and (e) opening a gate valve of the slurry return pipe to enable waste liquid to flow out, and repeating the steps e-f until the grouting pressure of the key grouting hole reaches 3MPa or the slurry leakage phenomenon of the overflow valve occurs, and stopping grouting.
Claims (4)
1. The utility model provides an utilize multistage shutoff country rock crack water of thick liquid and microorganism mineralization device which characterized in that: the annular water-stop curtain comprises a first plugging component and a second plugging component, wherein the first plugging component is arranged in a key grouting hole, the second plugging component is respectively arranged in annular water-stop curtain drill holes, the annular water-stop curtain comprises six annular water-stop drill holes which are uniformly and radially arranged by taking the key grouting hole as a circle center and taking a distance of 0.8-1.5 m as a radius, the first plugging component comprises an anchor rod positioned at the center of the key grouting hole, a first drill hole plug positioned at the key grouting hole orifice at the end part of the anchor rod is provided with a first grouting pipeline channel and a third grouting pipeline, the first grouting pipeline and the third grouting pipeline respectively extend inwards to the bottom of the key grouting hole through channels, the second plugging component comprises a second drill hole plug positioned at the end part of each water-stop drill hole, a second grouting pipeline is arranged on the second drill hole plug, and the second grouting pipeline extends inwards to the bottom of the water-stop drill holes through the grouting pipeline, the end part of the first grouting pipeline extending out of the first drilling hole blocking plug is provided with two branch pipelines which are a first branch pipeline and a second branch pipeline respectively, the end parts of the first branch pipeline and the second branch pipeline are fixedly connected with a hydraulic duplex pump respectively, the first branch pipeline and the second branch pipeline are provided with a flow meter and a gate valve respectively, and the first branch pipeline is filled with fixing liquid CaCl2The solution and the branch are communicated with urea solution.
2. The device for plugging water in cracks of surrounding rock by using the multistage mineralization of slurry and microorganisms as claimed in claim 1, wherein: the first drilling plugging plug is further provided with a slurry return pipe, and the bottom of the slurry return pipe penetrates through the first drilling plugging plug body.
3. The device for plugging water in cracks of surrounding rock by using the multistage mineralization of slurry and microorganisms as claimed in claim 2, wherein: and a slurry pump and an overflow valve are arranged on the end part pipeline of the third bacteria injection liquid pipeline, which extends out of the first drilling hole and is blocked.
4. The device for plugging water in cracks of surrounding rock by using the multistage mineralization of the serous fluid and the microorganisms as claimed in claim 3, wherein: and a slurry pump and an overflow valve are also arranged on the end part pipeline of the second grouting pipeline extending out of the second drilling hole for blocking.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116539813A (en) * | 2023-05-25 | 2023-08-04 | 西南石油大学 | Wall roughness adjustable fissure medium microorganism mineralization shutoff model and device |
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2021
- 2021-02-04 CN CN202120312208.2U patent/CN214365993U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116539813A (en) * | 2023-05-25 | 2023-08-04 | 西南石油大学 | Wall roughness adjustable fissure medium microorganism mineralization shutoff model and device |
| CN116539813B (en) * | 2023-05-25 | 2024-04-09 | 西南石油大学 | Wall roughness adjustable crack medium microorganism mineralization shutoff model device |
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