CN115306345A - Water stopping method for surrounding rock fractures of underground water-sealed cave depot - Google Patents
Water stopping method for surrounding rock fractures of underground water-sealed cave depot Download PDFInfo
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- CN115306345A CN115306345A CN202210973654.7A CN202210973654A CN115306345A CN 115306345 A CN115306345 A CN 115306345A CN 202210973654 A CN202210973654 A CN 202210973654A CN 115306345 A CN115306345 A CN 115306345A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
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Abstract
The invention provides a water stopping method for a surrounding rock fracture of an underground water sealed cave depot, and relates to the technical field of fractured rock mass reinforcement. The invention provides a water stopping method for a surrounding rock fracture of an underground water sealed cave reservoir, which comprises the following steps of: s1, determining the positions of grouting holes around the surrounding rock cracks, and drilling the grouting holes according to the determined positions of the grouting holes; s2, connecting grouting equipment at the position of the grouting hole, and injecting active bacterial liquid into the grouting hole; s3, injecting the nutrient solution of the active bacterium solution into a grouting hole through grouting equipment; wherein, the active bacterium liquid contains active bacteria, and the active bacteria can generate calcium carbonate sediment through metabolism. By utilizing the diameter advantage of the active bacteria and the clearance searching migration capacity to plug the surrounding rock cracks, excessive grouting pressure is not needed in the grouting process, the disturbance to the surrounding rock is small, the plugging difficulty is reduced, and the plugging efficiency is improved.
Description
Technical Field
The invention relates to the technical field of fractured rock mass reinforcement, in particular to a water stopping method for a surrounding rock fracture of an underground water sealed cave depot.
Background
An underground water-sealed cave depot is an underground space system excavated in a rock mass below a stable underground water level and used for storing crude oil, gasoline and diesel oil. Compared with an overground oil depot, the underground oil depot has the advantages of high safety, less occupied cultivated land, investment saving, less pollution, long service life, low operation and maintenance cost and the like.
During the construction of the underground water-sealed cave depot, the surrounding rocks are easy to generate cracks due to the vibration generated in the blasting process and the rock ground stress release in the excavation process, only the local surrounding rocks generate leak points, and the water seepage amount of the underground water-sealed cave depot is increased. In order to control the seepage during construction, the surrounding rock cracks need to be sealed by water.
In the existing surrounding rock crack water stop plugging mode, single-hole independent grouting is mostly adopted, grouting holes are randomly arranged and diverged, effective multidimensional poor and superposition effects cannot be formed, meanwhile, the existing grouting plugging method uses cement paste materials, the particle diameter of the cement paste materials is large and is 50-60 mu m, the effect of plugging a surrounding rock gap with large permeation quantity is poor, and great difficulty is brought to the surrounding rock crack plugging during construction.
Disclosure of Invention
The invention solves the following problems: the existing underground water-sealed cave depot surrounding rock cracks are sealed by cement, so that the construction difficulty is high.
(II) technical scheme
The invention provides a water stopping method for a surrounding rock fracture of an underground water sealed cave reservoir, which comprises the following steps of:
s1, determining the positions of grouting holes around the surrounding rock cracks, and drilling the grouting holes according to the determined positions of the grouting holes;
s2, connecting grouting equipment at the position of the grouting hole, and injecting active bacterial liquid into the grouting hole;
s3, injecting the nutrient solution of the active bacterium solution into a grouting hole through grouting equipment;
wherein, the active bacterium liquid contains active bacteria, and the active bacteria can generate calcium carbonate sediment through metabolism.
Further, injecting active bacterial liquid into the grouting hole, wherein the active bacterial liquid is obtained by an in-situ extraction method.
Further, before injecting the active bacterial liquid into the grouting hole, the method further comprises the following steps:
detecting the activity of the active bacteria in the active bacteria liquid and the concentration of the active bacteria;
the concentration of viable bacteria is 0D when the viable bacteria activity is less than 0.3ms/cm/min 600 When the concentration is less than 0.2, the active bacteria liquid needs to be prepared again.
Further, in the step of determining the position of the grouting hole around the surrounding rock fracture, the method comprises the following steps:
and a plurality of layers of grouting holes are transversely and longitudinally uniformly distributed by taking the surrounding rock fracture as a center along the direction from the direction close to the surrounding rock fracture to the direction far away from the surrounding rock fracture to form a plurality of hole rings.
Further, step S2 includes:
s21, taking two grouting holes from the same annular ring, wherein at least one grouting hole is required to be arranged between the two grouting holes at intervals, the two grouting holes are a first hole and a second hole respectively, and inserting grouting equipment into the first hole and the second hole;
s22, injecting active bacterial liquid into the surrounding rock fracture from the first hole by taking the first hole as an active bacterial liquid inlet and taking the second hole as an active bacterial liquid outlet, and leading the active bacterial liquid out from the second hole;
wherein step S22 is performed at least once.
Further, step S3 includes the steps of:
s31, taking the first hole in the step S21 as a nutrient solution inlet and the second hole as a nutrient solution outlet, injecting nutrient solution into the surrounding rock through the first hole, and leading out the nutrient solution through the second hole;
wherein step S31 is performed at least once.
Further, after step S31, the method further includes the steps of:
s41, taking the first hole in the step S22 as an active bacterial liquid outlet, taking the second hole as an active bacterial liquid inlet, injecting active bacterial liquid into the surrounding rock fracture through the second hole, and drawing out the active bacterial liquid through the first hole;
wherein step S41 is performed at least once.
Further, after step S41, the method further includes the steps of:
s51, taking the first hole in the step S41 as a nutrient solution outlet and the second hole as a nutrient solution inlet, injecting nutrient solution into the surrounding rock cracks through the second hole, and drawing out the nutrient solution through the first hole;
wherein step S51 is performed at least once.
Further, the method also comprises the following steps:
and S6, repeating the steps S21, S22, S31, S41 and S51 until all the grouting holes are filled with active bacterial liquid and nutrient solution.
Further, after step S6, the method further includes the steps of:
detecting the seepage quantity of the surrounding rock cracks;
when the water seepage amount of the surrounding rock fracture is detected to be less than 1L/min, or the water seepage amount of the surface area of the surrounding rock fracture is detected to be less than 1L/(m) 2 D), finishing water stopping of the surrounding rock cracks, and curing the surrounding rock cracks.
When the seepage quantity at the surrounding rock fracture is detected to be more than or equal to 1L/min, or the seepage quantity of the surface area at the surrounding rock fracture is detected to be more than or equal to 1L/(m) 2 And d), taking two rings of all the rings, and performing S1, S21, S22, S31, S41 and S51 between the two rings until all the new grouting holes are filled with active bacteria liquid and nutrient liquid.
The invention has the beneficial effects that:
the invention provides a water stopping method for a surrounding rock fracture of an underground water sealed cave reservoir, which comprises the following steps of:
s1, determining the positions of grouting holes around the surrounding rock cracks, and drilling the grouting holes according to the determined positions of the grouting holes;
s2, connecting grouting equipment at the position of the grouting hole, and injecting active bacterial liquid into the grouting hole;
s3, injecting the nutrient solution of the active bacterium solution into a grouting hole through grouting equipment;
wherein, the active bacterium liquid contains active bacteria, and the active bacteria can generate calcium carbonate sediment through metabolism.
The diameter of the active bacteria is generally between 0.25 μm and 0.6 μm, while the diameter of the cement particles is between 50 μm and 60 μm. By utilizing the diameter advantage of the active bacteria and the clearance searching migration capacity to plug the surrounding rock cracks, excessive grouting pressure is not needed in the grouting process, the disturbance to the surrounding rock is small, the plugging difficulty is reduced, and the plugging efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a first process flow diagram of a water stopping method for surrounding rock fractures of an underground water-sealed cave depot according to an embodiment of the invention;
FIG. 2 is a second process flow chart of the water stopping method for the surrounding rock fractures of the underground water-sealed cave depot according to the embodiment of the invention;
FIG. 3 is a process flow chart of step S2 of the water stopping method for the surrounding rock fractures of the underground water-sealed cave depot according to the embodiment of the invention;
FIG. 4 is a third process flow chart of the steps of the water stopping method for the surrounding rock fractures of the underground water-sealed cave depot according to the embodiment of the invention;
FIG. 5 is a schematic structural diagram of a grouting device provided in an embodiment of the present invention cooperating with a surrounding rock fracture;
fig. 6 is a schematic structural diagram of the surrounding rock fracture fitting provided by the embodiment of the invention.
An icon: 1-surrounding rock fracture;
21-a first grommet; 22-a second eyelet; 23-a third eyelet; 24-grouting holes;
31-a first orifice sealer; 32-a second orifice sealer; 33-bacteria concentration detector; 34-a bacterial activity detector; 35-grouting piece; 36-a traction member; 37-a nutrient solution container; 38-active bacteria liquid container.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It should be noted that, in the description of the present invention, the terms "connected" and "mounted" should be interpreted broadly, for example, they may be fixedly connected, detachably connected, or integrally connected; can be directly connected or connected through an intermediate medium; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
One embodiment of the invention provides a water stopping method for a surrounding rock crack 1 of an underground water sealed cave depot, which is used for blocking water seepage at the surrounding rock crack 1 and avoiding influence on construction due to overlarge water seepage. As shown in fig. 1, the method comprises the following steps:
s1, determining the positions of grouting holes 24 around a surrounding rock fracture 1, and drilling the grouting holes 24 according to the determined positions of the grouting holes 24;
s2, connecting grouting equipment at the position of the grouting hole 24, and injecting active bacterial liquid into the grouting hole 24;
s3, injecting nutrient solution of the active bacterium solution into the grouting hole 24 through grouting equipment;
wherein, the active bacterial liquid can generate calcium carbonate precipitation through metabolism.
According to the method for sealing water in the surrounding rock fracture 1 of the underground water-sealed cave depot, as shown in fig. 1, firstly, after the position of the surrounding rock fracture 1 is determined, holes need to be distributed on the periphery of the surrounding rock fracture 1, and the position of a grouting hole 24 is determined, so that the injected active bacteria liquid can seal and seal the surrounding rock fracture 1. After the position of the grouting hole 24 is determined, drilling is carried out through drilling equipment, the grouting hole 24 needs to have a certain depth, optionally, the hole depth is between 2m and 6m, the depth of the grouting hole 24 can be 3m, 4m or 5m, and when the depth of the grouting hole 24 is less than 2m, active bacterial liquid can not be filled in the surrounding rock crack 1 completely, so that the surrounding rock crack 1 cannot be plugged effectively; when the depth of the grouting hole 24 is greater than 6m, the active bacteria liquid may be injected too deeply, so that the bacteria liquid is wasted, and the surrounding rock crack 1 is not completely blocked.
After the grouting hole 24 is drilled through the drilling equipment, the grouting equipment is connected to the grouting hole 24, and active bacteria liquid is injected into the grouting hole 24 through the grouting equipment.
The active bacterial liquid can generate calcium carbonate precipitation through metabolism, and the calcium carbonate precipitation can block the surrounding rock crack 1.
Calcium carbonate, an inorganic compound, is a main component of limestone and marble.
In this embodiment, optionally, the active bacterial liquid may be one of sporosarcina, bacillus mucilaginosus and bacillus alcalinus.
Several of the above mentioned bacteria are capable of metabolically producing calcium carbonate precipitates.
After the active bacteria liquid is injected into the grouting holes 24, the active bacteria liquid can migrate along the extending direction of the surrounding rock cracks 1, the active bacteria are attached to the surrounding rock cracks 1, calcium carbonate precipitation is generated through metabolism, the surrounding rock cracks 1 are plugged, and water stopping is achieved.
After the active bacteria liquid is injected into the grouting hole 24, nutrient liquid is injected into the grouting hole 24 through grouting equipment, and the nutrient liquid is used for culturing bacteria in the active bacteria liquid and providing a calcium source for the active bacteria.
Optionally, in this embodiment, the nutrient solution may be a mixed solution of anhydrous calcium chloride and urea, or soy peptone, or the like.
By injecting nutrient solution into the grouting holes 24 through injecting the nutrient solution into the grouting holes 24, the activity of active bacteria is improved, the metabolism speed of the active bacteria is accelerated, and the active bacteria can generate a large amount of calcium carbonate precipitates quickly to plug the surrounding rock cracks 1.
In this embodiment, the diameter of the viable bacteria is generally between 0.25 μm and 0.6 μm, while the diameter of the cement particles is between 50 μm and 60 μm. By utilizing the diameter advantage of the active bacteria and the clearance searching and moving capacity to plug the surrounding rock cracks 1, excessive grouting pressure is not needed in the grouting process, the disturbance to the surrounding rock is small, the plugging difficulty is reduced, and the plugging efficiency is improved.
For example, the grouting pressure may be about 2MPa in the process of plugging the surrounding rock fracture 1 with the cement paste, and about 0.1 to 0.8MPa in the process of plugging the surrounding rock fracture 1 with the active bacterial liquid.
Optionally, in this embodiment, before step S1, the following steps are further included:
and S0, determining the water seepage position of the surrounding rock fracture 1.
Wherein, confirm the infiltration position of country rock crack 1 includes:
and judging the water seepage amount of the surrounding rock fracture 1, and when the water seepage amount of the surrounding rock fracture 1 is more than 2L/min, plugging the surrounding rock fracture 1.
And the surrounding rock fracture 1 at the seepage amount of less than or equal to 2L/min can be treated without treatment, and the influence on the use is slightly small.
Optionally, in this embodiment, the active bacterial liquid is obtained by an in-situ extraction method.
In the embodiment, in-situ extraction, namely extraction of active bacteria is carried out from the periphery of the surrounding rock fracture 1 to be plugged, so as to culture the bacteria liquid capable of generating calcium carbonate precipitates, and avoid ecological influence caused by introduction of new active bacteria at the surrounding rock.
For example, sarcina spongiensis is extracted from the position or periphery of a certain surrounding rock fracture 1, and when the surrounding rock fracture 1 is blocked, the sarcina spongiensis extracted in situ can be cultured and then injected into the grouting hole 24 through the grouting hole 24.
According to the water stopping method for the surrounding rock fracture 1 of the underground water-sealed cave depot, as shown in fig. 2, in the step S2, before injecting the active bacterial liquid into the grouting hole 24, the method further comprises the following steps:
detecting the activity of the active bacteria in the active bacteria liquid and the concentration of the active bacteria;
the concentration of viable bacteria is 0D when the viable bacteria activity is less than 0.3ms/cm/min 600 When the concentration is less than 0.2, the active bacteria liquid needs to be prepared again.
In this embodiment, the grouting equipment includes bacteria activity detector 34 and bacteria concentration detector 33, when injecting active bacterial liquid into grouting hole 24 through grouting equipment, need first detect the activity and the concentration of active bacterium through bacteria activity detector 34 and bacteria concentration detector 33, when the activity and the concentration of active bacterium can't reach above-mentioned requirement, probably lead to the country rock crack 1 shutoff too slow, can't effectively carry out effective shutoff etc. to country rock crack 1. Therefore, when the activity and concentration of the active bacteria do not meet the above criteria, the active bacteria solution is reconfigured until the activity of the active bacteria in the active bacteria solution is greater than or equal to 0.3ms ≥ based on the total concentration of active bacteria in the active bacteria solutionconcentration of viable bacteria 0D at cm/min 600 When the concentration is 0.2 or more, the active bacterial liquid can be injected into the injection hole 24.
In the present embodiment, the step S1 of determining the position of the grouting hole 24 around the surrounding rock fracture 1 includes:
a plurality of layers of grouting holes 24 are transversely and longitudinally uniformly distributed by taking the surrounding rock fracture 1 as a center along the direction from the direction close to the surrounding rock fracture 1 to the direction far away from the surrounding rock fracture 1 to form a plurality of hole rings.
In the embodiment, a plurality of hole rings are formed, so that the aim of plugging the surrounding rock fracture 1 more completely is fulfilled.
Specifically, as shown in fig. 5, with the surrounding rock fracture 1 as the center, the plurality of layers of grouting holes 24 are arranged along the two lateral sides and the plurality of layers of grouting holes 24 are arranged along the two longitudinal sides, along the direction from the direction close to the surrounding rock fracture 1 to the direction away from the surrounding rock fracture 1, and the plurality of square hole rings are formed by the lateral and longitudinal grouting holes 24. On each annular ring, there is a certain space between two adjacent grouting holes 24.
In this embodiment, through arranging multilayer slip casting hole 24, can make active fungus liquid more comprehensive infiltration advance the country rock in, improve the stagnant water effect to country rock fracture 1.
For example, in the present embodiment, as shown in fig. 5 and 6, two layers of grouting holes 24 are arranged along both lateral sides and two layers of grouting holes 24 are arranged along both longitudinal sides with the surrounding rock fracture 1 as the center, and finally two square-shaped hole rings are formed.
According to the water stopping method for the surrounding rock fracture 1 of the underground water-sealed cave depot, as shown in fig. 3, step S2 is that a grouting device is connected to the position of the grouting hole 24, and active bacteria liquid is injected into the grouting hole 24, and the method comprises the following steps:
s21, taking two grouting holes 24 from the same annular ring, wherein at least one grouting hole 24 is required to be arranged between the two grouting holes 24, the two grouting holes 24 are respectively a first hole and a second hole, and grouting equipment is connected into the first hole and the second hole;
s22, injecting active bacterial liquid into the surrounding rock fracture 1 through the first hole by taking the first hole as an active bacterial liquid inlet and taking the second hole as an active bacterial liquid outlet, and drawing out the active bacterial liquid through the second hole;
wherein step S22 is performed at least once.
In this embodiment, the grouting apparatus further includes: slip casting 35, active fungus liquid container 38, first orifice obturator 31, second orifice obturator 32, first pipeline, second pipeline and pull 36, slip casting 35 includes pump inlet and pump outlet.
Optionally, the traction member 36 is used for drawing out the active bacteria liquid injected into the surrounding rock fracture 1 and drawing out the nutrient solution injected into the surrounding rock fracture 1, and meanwhile, the traction member 36 can also filter the drawn out active bacteria liquid and nutrient solution.
One end of the first pipeline is communicated with the second orifice sealer 32, and the other end of the first pipeline is communicated with the active bacteria liquid container 38 through the traction piece 36, the bacteria activity detector 34 and the bacteria concentration detector 33;
one end of the second pipeline is communicated with the active bacteria liquid solution, and the other end of the second pipeline is communicated with the pump inlet through a bacteria activity detector 34 and a bacteria concentration detector 33; the pump outlet communicates with said first orifice sealer 31.
In the present embodiment, two grouting holes 24 are selected from the same ring, and for convenience of description, the two grouting holes 24 are respectively named as a first hole and a second hole. When the first hole and the second hole are selected, at least one grouting hole 24 needs to be arranged between the first hole and the second hole at intervals, the problem that the distribution of the active bacteria liquid in the surrounding rock is influenced due to the fact that the distance between the two grouting holes 24 is too close is avoided, and the distribution of the active bacteria liquid in the surrounding rock is more uniform.
The first orifice sealer 31 is arranged at the first hole, the second orifice sealer 32 is arranged at the second hole, active bacteria liquid is injected into the first hole through the grouting piece 35, and the active bacteria liquid is led out through the second hole.
The purpose of draining the active bacteria liquid away from the surrounding rock is to avoid influencing the adhesiveness of the active bacteria and influencing the subsequent step of injecting the nutrient solution because a large amount of liquid is left in the active bacteria liquid besides the active bacteria. In the flowing process of the active bacterial liquid in the surrounding rock crack 1, the active bacteria in the active bacterial liquid are attached to the surrounding rock crack 1, and calcium carbonate precipitation can be generated through the metabolism of the active bacteria to block the surrounding rock crack 1.
In this embodiment, the active bacteria liquid is injected into the surrounding rock through the first hole, and then is drawn out through the second hole, and after impurities are filtered by the drawing member 36, the active bacteria liquid flows back to the active bacteria liquid container 38 to be injected next time, so as to form a closed cycle.
In this embodiment, in step S22, the injection of the active bacteria liquid is completed for a certain time, which may be determined according to the actual situation of the surrounding rock fracture 1, for example, 5 minutes and 10 minutes. It is also possible that the bacterial activity and bacterial concentration of the circulating bacteria are lower than the above requirements (since the first pipeline is also connected to the bacterial activity detector 34 and the bacterial concentration detector 33, the active bacteria liquid will also pass through the bacterial activity detector 34 and the bacterial concentration detector 33 during the backflow process).
In this embodiment, step S22 is executed at least once, and optionally, step S22 may be executed once, or may be executed for the second time and the third time after a period of time. The specific execution times can be determined according to the actual situation of the surrounding rock fracture 1.
In this embodiment, by executing step S22 multiple times, it is ensured that a large amount of active bacteria are attached to the surrounding rock fracture 1, so that the active bacteria can block the surrounding rock fracture 1 through calcium carbonate precipitation generated by metabolism.
Optionally, in this embodiment, step S22 is executed three times in total.
As shown in fig. 4, in step S3, injecting the nutrient solution of the active bacteria solution into the grouting hole 24 by using a grouting device includes the following steps:
s31, taking the first hole in the step S21 as a nutrient solution inlet and the second hole as a nutrient solution outlet, injecting nutrient solution into the surrounding rock through the first hole, and leading out the nutrient solution through the second hole;
wherein step S31 is performed at least once.
In this embodiment, after accomplishing step S2, wait for certain time, inject nutrient solution into surrounding rock crack 1 again, for the bacterium grows and breeds and provides external conditions, guarantee that it can normally carry out metabolism and produce calcium carbonate deposit, can carry out the shutoff to surrounding rock crack 1.
In this embodiment, the first and second orifice sealers 31 and 32 are continuously placed at the first and second holes in step S21 without position adjustment, and the grouting apparatus further includes a nutrient solution container 37 for storing nutrient solution, a third pipeline, and a fourth pipeline. One end of the third pipeline is communicated with the second orifice sealer through the traction piece 36, and the other end of the third pipeline is communicated with the nutrient solution container 37; one end of the fourth pipeline is communicated with the nutrient solution container 37, and the other end of the fourth pipeline is communicated with the pump inlet.
In this embodiment, the circulation path of the nutrient solution is: the nutrient solution container 37 enters the surrounding rock fracture 1 through the fourth pipeline, the grouting piece 35 and the first orifice sealer, and then returns back to the nutrient solution container 37 through the second orifice sealer and the traction piece 36.
In this embodiment, step S31 is performed once, and the nutrient solution may be injected for a certain time, such as 5 minutes or 10 minutes, according to the case of injecting the active bacterial solution.
In this embodiment, step S31 is performed at least once to avoid uneven distribution of the nutrient solution in the surrounding rock fractures 1, which may affect the metabolism of the active bacteria.
Preferably, step S31 and step S22 are performed the same number of times.
Optionally, in this embodiment, after the execution of all times of step S22 is completed, step S31 is executed at a certain time interval. The interval time may be 30 minutes, 60 minutes.
In this embodiment, the interval time is preferably 60 minutes.
According to the water stopping method for the surrounding rock fractures 1 of the underground water-sealed cavern, as shown in fig. 4, after the step S31, the method further comprises the following steps:
s41, taking the first hole in the step S22 as an active bacterial liquid outlet and the second hole as an active bacterial liquid inlet, injecting active bacterial liquid into the surrounding rock crack 1 through the second hole, and drawing out the active bacterial liquid through the first hole;
wherein step S41 is performed at least once.
In this embodiment, the active bacterial liquid inlet and the active bacterial liquid outlet in step S22 are exchanged, the first orifice sealer 31 is connected to the second hole, the second orifice sealer 32 is connected to the first hole, the active bacterial liquid is injected into the surrounding rock fracture 1 through the second hole, and the active bacterial liquid is drawn out through the first hole.
In this embodiment, the flow path of the active bacterial liquid is that the active bacterial liquid container 38 is injected into the surrounding rock fracture 1 through the bacterial activity detector 34, the bacterial concentration detector 33, the grouting member 35, the first orifice sealer 31 and the second orifice, and then flows back into the active bacterial liquid container 38 through the first orifice sealer 32, the second orifice sealer 32, the traction member 36, the bacterial activity detector 34 and the bacterial concentration detector 33.
In this embodiment, the active bacteria liquid inlet and the active bacteria liquid outlet in step S21 are exchanged, so that the active bacteria liquid injected into the surrounding rock fracture 1 is more uniformly distributed in the surrounding rock fracture 1.
In this embodiment, step S41 is performed at least once to ensure that the active bacteria are distributed uniformly in the surrounding rock fractures 1.
In this embodiment, the definition performed once in step S41 is the same as the definition performed once in step S22, and is not described herein again.
As shown in fig. 4, after step S41, the method further includes the steps of:
s51, taking the first hole in the step S41 as a nutrient solution outlet and the second hole as a nutrient solution inlet, injecting nutrient solution into the surrounding rock fracture 1 through the second hole, and drawing out the nutrient solution through the first hole;
step S51 is performed the same number of times as step S41.
In this embodiment, after the step S41 is completed for all times, the nutrient solution is injected into the surrounding rock fracture 1 by using the second hole as the nutrient solution inlet and using the first hole as the nutrient solution outlet.
The flow path of the nutrient solution is as follows: the nutrient solution enters the surrounding rock crack 1 from a nutrient solution container 37 through a grouting piece 35, a first orifice sealer 31 and a second orifice, and then flows back to the nutrient solution container 37 from the first orifice sealer 32, the second orifice sealer 32 and a traction piece 36.
In this embodiment, the definition of the step S51 being executed once is the same as the definition of the step S31 being executed once, and is not described herein again.
In this embodiment, after the step S51 is completed, the active bacteria liquid injection in the first hole and the second hole is completed.
Then, as shown in fig. 4, the method further includes the steps of:
and repeating the steps S21, S22, S31, S41 and S51 until all the grouting holes 24 are filled with active bacterial liquid and nutrient solution.
That is, in this embodiment, two holes are continuously selected from the remaining grouting holes 24, which are an active bacteria liquid inlet and an active bacteria liquid outlet, respectively, the active bacteria liquid is first injected by using the grouting device, after the nutrient liquid is injected, the active bacteria liquid inlet and the active bacteria liquid outlet are exchanged, and the active bacteria liquid and the nutrient liquid are injected again until all the grouting holes 24 complete the above-mentioned process.
As shown in fig. 4, after the last nutrient solution injection is completed and a certain period of time is waited, the water permeability of the surrounding rock fracture 1 needs to be detected.
Optionally, the waiting time is greater than or equal to 72 hours, and if the waiting time is less than 72 hours, sufficient active bacteria may not be generated, and calcium carbonate blocked by the surrounding rock cracks 1 can be precipitated, so that the subsequent judgment of water seepage is influenced to a certain extent.
In this embodiment, the water permeability around the surrounding rock fracture 1 is detected, and when the water permeability at the surrounding rock fracture 1 is detected to be less than 1L/min, or the water permeability at the surface area of the surrounding rock fracture 1 is detected to be less than 1L/(m) 2 And d), finishing grouting and maintaining the surrounding rock fracture 1.
In this embodiment, the surface area seepage amount at the surrounding rock fracture 1 is the total water amount seeping from all regions capable of seeping water at the surrounding rock fracture 1 and within the range of the grouting holes around the surrounding rock fracture.
And when the detected seepage quantity meets the requirements, stopping water in the surrounding rock fracture 1 to finish maintenance work around the surrounding rock fracture 1, and the like.
And when the water seepage amount of the surrounding rock fracture 1 is detected to be more than or equal to 1L/min, or the water seepage amount of the surface area of the surrounding rock fracture 1 is detected to be more than or equal to 1L/(m) 2 And d), taking two rings, drilling a new grouting hole 24 between the two rings, and executing S1, S21, S22, S31, S41 and S51 until all the new grouting holes 24 are filled with active bacterial liquid and nutrient liquid.
In the embodiment, for the surrounding rock fracture 1 with the seepage amount still exceeding the requirement after the injection of the active bacterial liquid, two layers of the previous multi-layer hole rings are taken, the grouting holes 24 are rearranged along the two transverse and longitudinal sides by still taking the center of the surrounding rock fracture 1 as the center between the two layers of the hole rings to form a new hole ring, any two grouting holes 24 are taken in the new hole ring and are respectively an active bacterial liquid inlet and an active bacterial liquid outlet, and one grouting hole 24 is further arranged between the active bacterial liquid inlet and the active bacterial liquid outlet. Injecting active bacteria liquid into the active bacteria liquid inlet through grouting equipment, and then drawing the active bacteria liquid out through the active bacteria liquid outlet. And after the injection of the active bacterial liquid is finished, taking the active bacterial liquid inlet as a nutrient solution inlet and the active bacterial liquid outlet as a nutrient solution outlet, injecting the nutrient solution into the nutrient solution inlet through a grouting device, and drawing out the nutrient solution from the nutrient solution outlet. After the active bacterial liquid and the nutrient solution are injected, the positions of the two orifice sealers are exchanged, the active bacterial liquid and the nutrient solution are continuously injected until the active bacterial liquid and the nutrient solution are injected into all newly-opened grouting holes 24, grouting is finished, the water seepage amount of the surrounding rock fracture 1 is detected again after a certain time, if the water seepage amount of the surrounding rock fracture 1 meets the requirements, water stop of the surrounding rock fracture 1 is finished, and if the water seepage amount of the surrounding rock fracture 1 does not meet the requirements, the steps are continuously repeated.
Taking the example of including two rings, first, the location of the surrounding rock fracture 1 is determined. In an underground water-sealed cave depot, when the water seepage amount of a certain surrounding rock crack 1 is detected to be more than 2L/min, the crack needs to be sealed by water stopping.
The grouting holes 24 are arranged around the surrounding rock fracture 1, in the embodiment, two layers of grouting holes 24 are arranged on the two sides of the surrounding rock fracture 1 in the transverse direction and the longitudinal direction, and after the positions of the grouting holes 24 are determined, drilling is carried out through drilling equipment, wherein the hole depth is 4m in the embodiment. After drilling is completed, two square rings are formed as shown in fig. 6. For convenience of description, the inside is the second eyelet 22, and the outside is the first eyelet 21. Thereafter, all the grout holes 24 are flushed to flush away the grout in the holes. When the backwater for washing the grouting hole 24 does not contain slurry any more, the cleaning is completed, and the injection of active bacteria liquid is started.
The active bacterial liquid adopts a 'one-injection and one-guide' mode to perform double-hole circulating grouting. Specifically, firstly, any two grouting holes 24 are taken from the first annular ring 21, one grouting hole 24 is further required to be spaced between the two grouting holes 24, the first orifice sealer 31 is connected to one grouting hole 24, the second orifice sealer 32 is connected to the other grouting hole 24, and the injection of the active bacteria liquid is prepared.
The active bacterial liquid is obtained by an in-situ extraction method, namely active bacteria at the position of the surrounding rock fracture 1 and at the periphery of the surrounding rock fracture are extracted, and bacteria capable of generating calcium carbonate are selected for culture to form the active bacterial liquid in the embodiment.
Optionally, in this embodiment, taking sarcina sporulata as an example, bacteria extracted from the surrounding rock fracture 1 are detected to contain sarcina sporulate, and a worker extracts and cultures sarcina sporulate to obtain an active bacterial liquid rich in sarcina sporulate.
Storing the obtained active bacterial liquid rich in Sporosarcina in an active bacterial liquid container 38, detecting the concentration and activity of the Sporosarcina by a bacterial concentration detector 33 and a bacterial activity detector 34, and when the detection conforms to the condition that the activity is more than or equal to 0.3ms/cm/min, the concentration is 0D 600 At 0.2 or more, the injection is ready to be started through the grout member 35, otherwise the reconfiguration is required.
In this example, the activity of Sporosarcina was 0.5ms/cm/min, and the concentration of Sporosarcina was 0D 600 Is 1.
After the preparation of the active bacterial liquid is completed, the grouting piece 35 is opened, and the injection speed and pressure are set, wherein the speed is selected to be 0.2L/min-2.0L/min, and the pressure is selected to be 0.1 MPa-0.8 MPa.
In this example, the selection rate was 1.0L/min and the pressure was 0.5MPa.
In this embodiment, when the injection rate of the active bacterial liquid is less than 0.2L/min, a large amount of active bacteria are attached to the side close to the first orifice sealer 31 due to too slow flow rate of the active bacterial liquid, and the amount of the active bacterial liquid attached to the side of the second orifice sealer 32 is less, so that the distribution of the active bacterial liquid is not uniform. When the injection rate of the active bacteria liquid is greater than 2L/min, the amount of the active bacteria attached to the surrounding rock fracture 1 is too small, and sufficient calcium carbonate precipitation cannot be generated to plug the surrounding rock fracture 1 to stop water.
When the injection pressure of the active bacterial liquid is less than 0.1MPa, the pressure is too low, and the backflow of the active bacterial liquid cannot be realized, and when the pressure is more than 0.8MPa, the impact force on the surrounding rock fracture 1 is large, further damage is caused to the surrounding rock fracture 1, and water stopping is influenced.
After the preparation work is completed, the active bacteria liquid in the active bacteria liquid container 38 is injected into the grouting hole 24 through the grouting member 35, filtered by the traction member 36 and then drained back into the active bacteria liquid container 38. In this example, the time for injecting the active bacterial suspension was 5 minutes.
In this example, active bacterial liquid was co-injected three times.
After the three times of active bacteria liquid injection is completed, the nutrient liquid is prepared to be injected into the grouting holes 24 at an interval of 60 minutes.
In the process of injecting the nutrient solution, the injection speed of the nutrient solution is 0.2L/min-2.0L/min, and the injection pressure is 0.1 MPa-0.8 MPa.
Also, when the injection rate of the nutrient solution is less than 0.2L/min, more nutrient solution may be accumulated on the side close to the first orifice stopper 31, resulting in uneven distribution of the nutrient solution. When the injection rate of the nutrient solution is more than 2L/min, the nutrient solution remained in the surrounding rock cracks 1 is too little to meet the metabolic demand of active bacteria.
When the injection pressure of the nutrient solution is less than 0.1MPa, the pressure is too low, and the backflow of the nutrient solution cannot be realized, and when the injection pressure is more than 0.8MPa, the impact force on the surrounding rock fracture 1 is large, further damage is caused to the surrounding rock fracture 1, and water stopping is influenced.
Also, in this example, the nutrient solution was injected three times in total.
In this embodiment, the nutrient solution is a mixed solution of anhydrous calcium chloride and urea, wherein the main components of the nutrient solution are known in the art and are not within the scope of the present application, and are not described in detail herein.
When the nutrient solution injection is completed, the positions of the first port sealer 31 and the second port sealer 32 are exchanged. And re-injecting active bacteria liquid. Before the active bacteria liquid is injected, the concentration and the bacterial activity of the active bacteria liquid need to be detected, and when the activity of the detected active bacteria is more than or equal to 0.3ms/cm/min, the concentration is 0D 600 At 0.2 or more, the injection is ready to be started through the grout member 35, otherwise the reconfiguration is required.
In this example, the activity of Sporosarcina was 0.5ms/cm/min, and the concentration of Sporosarcina was 0D 600 Is 1.
Optionally, the injection rate of the active bacterial liquid is selected to be 0.2L/min-2.0L/min, and the pressure is 0.1 MPa-0.8 MPa.
In this example, the selection rate was 1.0L/min and the pressure was 0.5MPa.
In this embodiment, when the injection rate of the active bacterial liquid is less than 0.2L/min, a large amount of active bacteria are attached to the side close to the first orifice sealer 31 due to too slow flow rate of the active bacterial liquid, and the amount of the active bacterial liquid attached to the side of the second orifice sealer 32 is less, so that the distribution of the active bacterial liquid is not uniform. When the injection rate of the active bacteria liquid is more than 2L/min, the amount of the active bacteria attached to the surrounding rock crack 1 is too small, and sufficient calcium carbonate precipitation cannot be generated to plug the surrounding rock crack 1 to stop water.
When the injection pressure of the active bacterial liquid is less than 0.1MPa, the pressure is too low, and the backflow of the active bacterial liquid cannot be realized, and when the pressure is more than 0.8MPa, the impact force on the surrounding rock fracture 1 is large, further damage is caused to the surrounding rock fracture 1, and water stopping is influenced.
After the preparation work is completed, the active bacteria liquid in the active bacteria liquid container 38 is injected into the grouting hole 24 through the grouting member 35, filtered by the traction member 36 and then drained back into the active bacteria liquid container 38. In this example, the time for injecting the active bacterial suspension was 5 minutes.
In this example, the active bacterial solution was co-injected once.
After the injection of the active bacteria liquid is finished, the nutrient liquid is ready to be injected into the grouting hole 24 at an interval of 60 minutes.
In the process of injecting the nutrient solution, the injection speed of the nutrient solution is 0.2L/min-2.0L/min, and the injection pressure is 0.1 MPa-0.8 MPa.
Also, when the injection rate of the nutrient solution is less than 0.2L/min, more nutrient solution may be accumulated on the side close to the first orifice stopper 31, resulting in uneven distribution of the nutrient solution. When the injection rate of the nutrient solution is more than 2L/min, the nutrient solution remained in the surrounding rock cracks 1 is too little to meet the metabolic demand of active bacteria.
When the injection pressure of the nutrient solution is less than 0.1MPa, the pressure is too low, and the backflow of the nutrient solution cannot be realized, and when the injection pressure is more than 0.8MPa, the impact force on the surrounding rock fracture 1 is large, further damage is caused to the surrounding rock fracture 1, and water stopping is influenced.
In this example, the selection rate was 1.0L/min and the pressure was 0.5MPa.
In this embodiment, the nutrient solution is a mixed solution of anhydrous calcium chloride and urea, wherein the main components of the nutrient solution are known in the art and are not within the scope of the present application, and are not described in detail herein.
Also, in this example, the nutrient solution was co-injected once.
After the two injection holes 24 complete the injection of the active bacteria liquid and the nutrient liquid, the first orifice sealer 31 and the second orifice sealer 32 are disassembled, and the active bacteria liquid and the nutrient liquid are continuously injected into the other holes of the first annular ring 21. After the active bacteria liquid and the nutrient solution are injected into all the holes of the first hole ring 21, the active bacteria liquid and the nutrient solution are injected into the holes of the second hole ring 22 until all the grouting holes 24 complete the above-mentioned injection operation.
And after the active bacterial liquid and the nutrient solution are completely injected, waiting for 72 hours, and detecting the water seepage amount in the grouting area.
When the water seepage amount of the surrounding rock fracture 1 is detected to be less than 1L/min, or the water seepage amount of the surface area of the surrounding rock fracture 1 is detected to be less than 1L/(m) 2 And d), finishing grouting and curing the surrounding rock crack 1.
When the water seepage amount of the surrounding rock fracture 1 is detected to be more than or equal to 1L/min, or the water seepage amount of the surface area of the surrounding rock fracture 1 is detected to be more than or equal to 1L/(m) 2 D), opening a third annular ring 23 between the first annular ring 21 and the second annular ring 22, and continuously injecting active bacteria liquid and nutrient solution into the surrounding rock fracture 1.
Specifically, any two grouting holes 24 are provided in the third annular ring 23, one grouting hole 24 is required to be spaced between the two grouting holes 24, and the first orifice sealer 31 and the second orifice sealer 32 are respectively connected to the two grouting holes 24.
The preparation activity is more than or equal to 0.3ms/cm/min, and the concentration is 0D 600 The injection of the active bacterial liquid of sarcina sporogenes of 0.2 or more is started through the grouting member 35.
In this example, the activity of Sporosarcina was 0.5ms/cm/min, and the concentration of Sporosarcina was 0D 600 Is 1.
And starting the grouting piece 35, and setting the injection rate and pressure, wherein the rate is selected to be 0.2L/min-2.0L/min, and the pressure is selected to be 0.1 MPa-0.8 MPa.
In this example, the selection rate was 1.0L/min and the pressure was 0.5MPa.
After the preparation work is completed, the active bacteria liquid in the active bacteria liquid container 38 is injected into the grouting hole 24 through the grouting member 35, filtered by the traction member 36, and then drained back into the active bacteria liquid container 38. In this example, the time for injecting the active bacterial suspension was 5 minutes.
In this example, the active bacterial solution was co-injected three times.
After the injection of the active bacteria liquid for three times is finished, the nutrient liquid is ready to be injected into the grouting holes 24 at an interval of 60 minutes.
In this embodiment, the nutrient solution is a mixed solution of anhydrous calcium chloride and urea, wherein the main components of the nutrient solution are known in the art, and are not within the protection scope of the present application, and are not described in detail herein.
In the process of injecting the nutrient solution, optionally, the injection rate of the nutrient solution is 0.2L/min-2.0L/min, and the injection pressure is 0.1 MPa-0.8 MPa.
In this example, the selection rate was 1.0L/min and the pressure was 0.5MPa.
Also, in this example, the nutrient solution was injected three times in total.
When the nutrient solution injection is completed, the positions of the first port sealer 31 and the second port sealer 32 are exchanged. And re-injecting active bacteria liquid. Before the active bacteria liquid is injected, the concentration and the bacterial activity of the active bacteria liquid need to be detected, and when the activity of the detected active bacteria is more than or equal to 0.3ms/cm/min, the concentration is 0D 600 At 0.2 or more, the injection is ready to be started through the grout member 35, otherwise the reconfiguration is required.
In this example, the activity of Sporosarcina was 0.5ms/cm/min, and the concentration of Sporosarcina was 0D 600 Is 1.
Optionally, the injection rate of the active bacterial liquid is selected to be 0.2L/min-2.0L/min, and the pressure is 0.1 MPa-0.8 MPa.
In this example, the selection rate was 1.0L/min and the pressure was 0.5MPa.
After the preparation work is completed, the active bacteria liquid in the active bacteria liquid container 38 is injected into the grouting hole 24 through the grouting member 35, filtered by the traction member 36, and then drained back into the active bacteria liquid container 38. In this example, the time for injecting the active bacterial suspension was 5 minutes.
In this example, the active bacterial liquid was co-injected once.
After the injection of the active bacteria liquid is finished, the nutrient liquid is ready to be injected into the grouting hole 24 at an interval of 60 minutes.
In this embodiment, the nutrient solution is a mixed solution of anhydrous calcium chloride and urea, wherein the main components of the nutrient solution are known in the art and are not within the scope of the present application, and are not described in detail herein.
In the process of injecting the nutrient solution, optionally, the injection rate of the nutrient solution is 0.2L/min-2.0L/min, and the injection pressure is 0.1 MPa-0.8 MPa.
In this example, the selection rate was 1.0L/min and the pressure was 0.5MPa.
Also, in this example, the nutrient solution was co-injected once.
After the two grouting holes 24 complete the injection of the active bacteria liquid and the nutrient solution, the first orifice sealer 31 and the second orifice sealer 32 are disassembled, and the active bacteria liquid and the nutrient solution are continuously injected into the other holes on the third orifice ring 23. And after all the holes on the third hole ring 23 are filled with active bacterial liquid and nutrient solution, waiting for 72 hours, and detecting the water seepage amount in the grouting area.
And after the detection, finishing water stopping after the water seepage amount of the surrounding rock fracture 1 meets the requirement, and maintaining the surrounding rock fracture 1.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A water stopping method for surrounding rock fractures of underground water sealed caverns is characterized by comprising the following steps:
s1, determining the positions of grouting holes (24) around a surrounding rock fracture (1), and drilling the grouting holes (24) according to the determined positions of the grouting holes (24);
s2, connecting grouting equipment at the position of the grouting hole (24), and injecting active bacterial liquid into the grouting hole (24);
s3, injecting nutrient solution of the active bacterium solution into the grouting hole (24) through grouting equipment;
wherein, the active bacterium liquid contains active bacteria, and the active bacteria can generate calcium carbonate sediment through metabolism.
2. The method for stopping water in the surrounding rock fractures of the underground water-seal cave depot according to claim 1, wherein in the step of injecting active bacteria liquid into the grouting holes (24), the active bacteria liquid is obtained by an in-situ extraction method.
3. The method for stopping water in the surrounding rock fractures of the underground water-sealed cave depot according to claim 1, wherein before injecting active bacteria liquid into the grouting holes (24), the method further comprises the following steps:
detecting the activity of the active bacteria in the active bacteria liquid and the concentration of the active bacteria;
the concentration of viable bacteria is 0D when the viable bacteria activity is less than 0.3ms/cm/min 600 When the concentration is less than 0.2, the active bacteria liquid needs to be prepared again.
4. The method for stopping water in the surrounding rock fissure of the underground water-seal cave depot according to the claim 1, wherein the step of determining the position of the grouting hole (24) around the surrounding rock fissure (1) comprises the following steps:
a plurality of layers of grouting holes (24) are transversely and longitudinally uniformly distributed by taking the surrounding rock crack (1) as a center along the direction from the direction close to the surrounding rock crack (1) to the direction far away from the surrounding rock crack (1) to form a plurality of hole rings.
5. The water stopping method for the surrounding rock fractures of the underground water-seal cave depot, which is characterized in that the step S2 comprises the following steps:
s21, taking two grouting holes (24) from the same annular ring, wherein at least one grouting hole (24) needs to be arranged between the two grouting holes (24), the two grouting holes (24) are respectively a first hole and a second hole, and grouting equipment is connected into the first hole and the second hole;
s22, injecting active bacterial liquid into the surrounding rock fracture (1) through the first hole by taking the first hole as an active bacterial liquid inlet and taking the second hole as an active bacterial liquid outlet, and leading the active bacterial liquid out through the second hole;
wherein step S22 is performed at least once.
6. The method for stopping water in the surrounding rock fractures of the underground water-sealed cave depot according to claim 5, wherein the step S3 comprises the following steps:
s31, taking the first hole in the step S21 as a nutrient solution inlet and the second hole as a nutrient solution outlet, injecting nutrient solution into the surrounding rock through the first hole, and drawing out the nutrient solution through the second hole;
wherein step S31 is performed at least once.
7. The water stopping method for the surrounding rock fractures of the underground water-seal cave depot, which is characterized by comprising the following steps after the step S31:
s41, taking the first hole in the step S22 as an active bacterial liquid outlet and the second hole as an active bacterial liquid inlet, injecting active bacterial liquid into the surrounding rock fracture (1) through the second hole, and drawing out the active bacterial liquid through the first hole;
wherein step S41 is performed at least once.
8. The water stopping method for the surrounding rock fractures of the underground water-seal cave depot, which is characterized by comprising the following steps after the step S41:
s51, taking the first hole in the step S41 as a nutrient solution outlet and the second hole as a nutrient solution inlet, injecting nutrient solution into the surrounding rock fissure (1) through the second hole, and drawing out the nutrient solution through the first hole;
wherein step S51 is performed at least once.
9. The method for stopping water in the surrounding rock fractures of the underground water-sealed cave depot as claimed in claim 7, further comprising the steps of:
and S6, repeating the steps S21, S22, S31, S41 and S51 until all the grouting holes (24) are filled with active bacteria liquid and nutrient solution.
10. The water stopping method for the surrounding rock fractures of the underground water-seal cave depot, which is characterized by comprising the following steps after the step S6:
detecting the water seepage amount of the surrounding rock fracture (1);
when the water seepage amount at the position of the surrounding rock fracture (1) is detected to be less than 1L/min, or the water seepage amount at the surface area of the surrounding rock fracture (1) is detected to be less than 1L/(m) 2 D), finishing water stopping of the surrounding rock fracture (1), and maintaining the surrounding rock fracture (1);
when the water seepage amount at the position of the surrounding rock fracture (1) is detected to be more than or equal to 1L/min, or the water seepage amount of the surface area at the position of the surrounding rock fracture (1) is detected to be more than or equal to 1L/(m) 2 D), taking two rings of all the rings, and executing S1, S21, S22, S31, S41 and S51 between the two rings until all the new grouting holes (24) are filled with active bacteria liquid and nutrient liquid.
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| CN111396086A (en) * | 2020-03-25 | 2020-07-10 | 中铁二十三局集团第四工程有限公司 | Sleeve method curtain grouting construction method |
| CN112855072A (en) * | 2021-02-04 | 2021-05-28 | 河南理工大学 | Device and method for multistage plugging of surrounding rock fracture water by utilizing slurry and microbial mineralization |
| CN112855071A (en) * | 2021-02-04 | 2021-05-28 | 河南理工大学 | Device and method for plugging gas extraction drill hole by using microbial mineralization circulation |
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| US20140318773A1 (en) * | 2013-04-26 | 2014-10-30 | Elliot B. Kennel | Methane enhanced liquid products recovery from wet natural gas |
| CN111396086A (en) * | 2020-03-25 | 2020-07-10 | 中铁二十三局集团第四工程有限公司 | Sleeve method curtain grouting construction method |
| CN112855072A (en) * | 2021-02-04 | 2021-05-28 | 河南理工大学 | Device and method for multistage plugging of surrounding rock fracture water by utilizing slurry and microbial mineralization |
| CN112855071A (en) * | 2021-02-04 | 2021-05-28 | 河南理工大学 | Device and method for plugging gas extraction drill hole by using microbial mineralization circulation |
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