CN109882183B - Water-rich loose fractured coal rock mass grouting consolidation experimental device and effect evaluation method - Google Patents
Water-rich loose fractured coal rock mass grouting consolidation experimental device and effect evaluation method Download PDFInfo
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- CN109882183B CN109882183B CN201910149753.1A CN201910149753A CN109882183B CN 109882183 B CN109882183 B CN 109882183B CN 201910149753 A CN201910149753 A CN 201910149753A CN 109882183 B CN109882183 B CN 109882183B
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Abstract
The invention provides a water-rich loose fractured coal-rock mass grouting consolidation experimental device and an effect evaluation method, which comprise an experimental cavity arranged in a steel kettle body, a circulating water pressure loading system communicated with a confining pressure loading system, a grouting system communicated with the confining pressure loading system, an ultrasonic testing system and a resistivity tomography system connected to the experimental cavity, wherein the circulating water pressure loading system is arranged in the steel kettle body; water pressure and chemical slurry are input into a stratum model experiment cavity, the wave velocity, dynamic mechanical parameters and resistivity information of a coal-based stratum in the experiment cavity in the grouting process are monitored in real time through an ultrasonic testing system and a resistivity tomography system, and the grouting reinforcement effect of the water-rich loose crushed coal rock mass is evaluated. The method provided by the invention realizes the multi-field physical evolution law simulation test and quantitative evaluation of grouting effect in the chemical grouting process of the interior of the water-rich loose fractured coal and rock mass, and provides scientific basis for grouting reinforcement parameter determination and effect inspection evaluation of the loose fractured coal and rock mass in underground engineering.
Description
Technical Field
The invention relates to a coal mine water-rich loose crushed coal and rock mass grouting consolidation experimental device and an effect evaluation method, which can better simulate the coal mine underground water-rich loose crushed coal and rock mass grouting consolidation process and effect evaluation. Belongs to the field of mine disaster prevention and control.
Background
The hydrogeological conditions of coal mines in China are complex, poor (harmful) coal-based strata such as water-rich sandstone aquifers, Ordovician limestone layers, faults, quicksand layers and even collapse columns are frequently encountered in the construction and exploitation processes of western coal mines, roof collapse, rib spalling, roof collapse and the like are easily caused in the construction process, the tunneling construction conditions are worsened, the difficulty is increased, meanwhile joints, mining cracks, poor geological structures and the like in the coal rock mass provide good water guide channels for underground water bodies, and disastrous accidents such as water inrush from the top and bottom plates of the mines, sand collapse and the like are easily caused. For a long time, grouting, water plugging and consolidation are one of effective means for controlling water burst and sand bursting hazards in the field of coal mine construction and mining engineering, and cement, cement-water glass, high-water resin, double-liquid chemical grouting materials and the like are applied. However, as the exploration data of the common coal measure strata is limited, the engineering geological structure is complex, and the grouting reinforcement construction process mostly depends on the traditional experience; the underground water burst, sand bursting, grouting, reinforcing and treating method belongs to concealed engineering, and grouting effect detection and evaluation have certain difficulty.
In recent years, nondestructive detection technologies such as resistivity imaging and ultrasonic detection are increasingly applied to in-situ damage detection engineering of coal and rock masses in poor coal mine strata, and an effective way is provided for accurate identification of macroscopic and microscopic damage defects such as coal and rock mass pore water saturation, porosity and permeability coefficient and evaluation of grouting reinforcement effect of water-rich loose fractured coal and rock masses in underground engineering.
Disclosure of Invention
The invention discloses a water-rich loose crushed coal rock mass grouting consolidation experimental device and an effect evaluation method, which fill a loose crushed coal rock mass physical analog simulation material or sand bodies with different grain diameters in an experimental cavity, the method comprises the steps of carrying out a water-rich loose fractured coal rock body grouting consolidation physical simulation test in a closed manner under the conditions of circulating water pressure, lateral confining pressure and grouting, measuring physical property parameters such as pore water saturation, porosity, permeability, wave velocity, dynamic elastic modulus, consolidation degree and range in the loose fractured coal rock body grouting consolidation process under the water-rich condition by using nondestructive monitoring methods such as ultrasonic waves and a resistivity tomography system, realizing a multi-field physical evolution law simulation test and quantitative evaluation of grouting effect in the internal chemical grouting process of the water-rich loose fractured coal rock body, and providing scientific basis for grouting reinforcement parameter determination and effect inspection evaluation of the loose fractured coal rock body in underground engineering.
The invention is realized by the following technical scheme.
The invention provides a water-rich loose crushed coal rock mass grouting consolidation experimental device which comprises a steel-structured kettle body, an experimental cavity, a circulating water pressure loading system, a grouting system, an ultrasonic testing system and a resistivity tomography system, wherein the experimental cavity is arranged in the steel-structured kettle body and loaded by a confining pressure loading system; water pressure and chemical slurry are input into a stratum model experiment cavity, the wave velocity, dynamic mechanical parameters and resistivity information of a coal-based stratum in the experiment cavity in the grouting process are monitored in real time through an ultrasonic testing system and a resistivity tomography system, and the grouting reinforcement effect of the water-rich loose crushed coal rock mass is evaluated.
With respect to the above technical solutions, the present invention has a further preferable solution:
further, confined pressure loading system includes a pair of pressure head, is in with the steel structure cauldron body and experiment cavity centre gripping through the bolt in the pressure head, be equipped with the circulating water pipeline of intercommunication circulating water pressure loading system, the slip casting pipeline of intercommunication slip casting system and the confined pressure pipeline of intercommunication liquid storage pot on a pair of pressure head respectively.
Further, the confining pressure pipeline is communicated with the liquid storage tank through a confining pressure injection pump.
Further, the experiment cavity is flexible organic glass cylinder, and is sealed through the flexible sleeve pipe of arranging a plurality of aspect insulation material along cylinder girth direction on average for loose broken coal rock mass and external isolation in the experiment cavity.
Furthermore, the grouting system comprises a slurry tank, a material suction pipe, a grouting pump, a material conveying pipe, an injection gun and an injection pipe, and the grouting system is communicated to the interior of the stratum model experiment cavity through a grouting pipeline.
Further, circulating water pressure loading system includes the circulating water pipeline that communicates in the pressure head at steel structure cauldron body both ends, and circulating water pipeline intercommunication liquid injection pump and water tank.
Furthermore, the ultrasonic testing system comprises an ultrasonic probe and a resistivity testing electrode probe which are respectively arranged on the surface and inside of the experimental cavity and connected to the data acquisition system.
Further, the resistivity tomography system comprises a resistivity tomography instrument 9 and a computer display which are communicated with the experiment cavity.
Further, the experimental cavity is made of flexible organic glass;
pressure and flow sensors are respectively arranged at the positions of the experiment cavity, the water tank, the liquid injection pump and the circulating water pipeline.
The invention correspondingly provides a water-rich loose fractured coal rock mass grouting consolidation experimental method, which comprises the following steps of:
1) experimental cavity for manufacturing stratum model
A cylindrical cavity is made of flexible organic glass materials, a plurality of layers and a plurality of resistivity test electrode probes are evenly arranged on the flexible insulating surface along the circumferential direction of the cylinder; a plurality of groups of ultrasonic probes are arranged at the same time, and the electrodes and the probe connecting wires are led out through sealing and reinforcement;
2) test model for building loose fractured coal and rock mass
Loading similar materials or loose sand bodies with different particle sizes into an experiment cavity according to specific engineering coal measure strata, and compacting loose crushed coal rock mass through a pressure head in a kettle to ensure that a resistivity test probe and an ultrasonic probe sensor are fully contacted with the coal rock mass;
3) the experimental cavity is arranged in the steel kettle body, so that the experimental cavity is sealed with the pressure head and isolated from the confining pressure medium; starting a confining pressure injection pump, applying confining pressure step by step to a preset load, and monitoring the confining pressure through a pressure sensor arranged on the confining pressure injection pump;
4) by starting the liquid injection pump and the pressure stabilizing device, water is injected into the experimental cavity according to the set water pressure through a preset annular circulating water pipeline at the upper end of the steel-structured kettle body;
5) starting a grouting system, opening a grouting pump, grouting into an experimental cavity along a grouting pipeline according to certain grouting pressure and flow through a preset hole at the lower end head of the steel-structured kettle body, acquiring and recording grouting pressure parameters, and adjusting the grouting parameters to perform grouting for multiple times;
6) after grouting, measuring wave velocities of coal and rock masses at different positions in the experimental cavity by using an ultrasonic signal generator and an ultrasonic probe, and calculating dynamic elastic modulus and dynamic Poisson ratio parameters; measuring the resistivity of different layers of the coal rock in the experimental cavity by using a resistivity tomography instrument and a resistivity test electrode probe, comparing and determining the pore distribution, the reinforcing range and the grouting diffusion path in the loose broken coal rock model, and evaluating the grouting consolidation effect;
7) modifying the test parameters, and repeating the steps 3) to 6); and (4) until the water-rich loose crushed coal rock mass grouting consolidation experiment is completed.
Compared with the prior art, the invention has the advantages that: filling a coal-based stratum physical similar simulation material or sand bodies with different particle sizes into an experimental cavity, and hermetically performing a water-rich loose fractured coal-rock mass grouting consolidation physical simulation test under the conditions of circulating water pressure, lateral confining pressure and grouting to realize a multi-field physical evolution law simulation test and quantitative evaluation of grouting effect in the internal chemical grouting process of the water-rich loose fractured coal-rock mass; the experiment cavity loading system is provided with independent control systems for water pressure, confining pressure and grouting, so that the accuracy and the stability are better; monitoring and analyzing physical property parameters such as pore water saturation, porosity, permeability, wave velocity, dynamic elastic modulus, consolidation degree and range and the like in the grouting consolidation process of the loose fractured coal rock mass under the water-rich condition by utilizing an ultrasonic and resistivity tomography system; the method can quantitatively describe and effectively reveal the evolution characteristics of a stress field, a fracture field, a seepage field and other multi-physical fields in the grouting consolidation process of the loose and broken coal rock mass under the water-rich condition, and provides a foundation for further researching the grouting reinforcement mechanism, determining the process parameters and treating the mine water disaster.
Drawings
FIG. 1 is a schematic structural diagram of an experimental apparatus according to the present invention.
FIGS. 2(a) and (b) are cross-sectional views of the sensor arrangement and the upper and lower ends of the chamber, respectively, of the experimental device of the present invention.
In the figure: 1-confining pressure injection pump; 2-a liquid storage tank; 3-a liquid injection pump; 4-a water tank; 5-grouting pump; 6-slurry tank; 7-an ultrasonic signal generator; 8-ultrasonic signal collector; 9-resistivity tomography; 10-a computer display; an 11-line channel; 12-a steel kettle body; 13-an ultrasonic probe; 14-resistivity test electrode probe; 15-confining pressure pipeline; 16-grouting a pipeline; 17-a circulating water pipeline; 18-an experimental cavity; 19-a flexible sleeve; 20-pressure head.
Detailed Description
The invention is further described in detail below with reference to the drawings and examples, but the invention is not limited thereto.
As shown in figure 1, the water-rich loose fractured coal-rock mass grouting consolidation experimental device comprises a steel kettle body 12, an experimental cavity 18 which is arranged in the steel kettle body 12 and loaded through a confining pressure loading system, a circulating water pressure loading system communicated with the confining pressure loading system, a grouting system communicated with the confining pressure loading system, an ultrasonic testing system and a resistivity tomography system.
Wherein, confined pressure loading system includes a pair of pressure head 20, and through the bolt with steel structure cauldron body 12 and experiment cavity 18 centre gripping in pressure head 20, be equipped with the confined pressure pipeline 15, slip casting pipeline 16 and the circulating water pipeline 17 of intercommunication circulating water pressure loading system on a pair of pressure head 20 respectively. The confining pressure pipeline 15 is communicated with the confining pressure injection pump 1 and the liquid storage tank 2. The cylindrical experiment cavity 18 in the steel kettle body 12 is sealed by the flexible sleeve 19 which is averagely arranged along the circumference direction of the cylinder and is made of a plurality of layer insulation materials, so that the loose crushed coal rock body in the experiment cavity 18 is isolated from the outside.
The grouting system comprises a slurry tank 6, a material suction pipe, a grouting pump 5, a material conveying pipe, an injection gun and an injection pipe, is communicated to a stratum model experiment cavity 18 through a grouting pipeline 16, and injects grouting slurry into an experiment model.
Wherein, circulating water pressure loading system includes circulating water pipeline 17 that communicates in the pressure head 20 at steel structure cauldron body 12 both ends, and circulating water pipeline 17 communicates liquid injection pump 3 and water tank 4.
The ultrasonic testing system comprises an ultrasonic signal generator 7, an amplifier, an ultrasonic transducer and an ultrasonic signal collector 8; and an ultrasonic probe 13 connected to a data acquisition system is respectively arranged on the surface and inside of the experiment cavity 18. The resistivity tomography system comprises a resistivity tomography instrument 9, a controller, a computer display 10, an electrode converter and a cable which are communicated with the experiment cavity 18, and resistivity test electrode probes 14 connected to the data acquisition system are respectively arranged on the surface and inside of the experiment cavity 18.
Water pressure is input into a stratum model experiment cavity 18 to form a water-rich loose fractured coal rock environment, chemical slurry is injected into the other end of the stratum model experiment cavity, the ultrasonic waves 13 and the resistivity test electrode probe 14 are used for monitoring the wave velocity, dynamic mechanical parameters and resistivity information of the coal measure stratum in the cavity in the grouting process in real time, and the grouting reinforcement effect of the water-rich loose fractured coal rock is further evaluated.
As shown in fig. 2(a), (b), in one embodiment, the steel kettle 12 is a cylindrical rigid structure with a diameter of 200mm and a length of 1500 mm; and a group of confining pressure pipelines 15 communicated with a confining pressure loading system, a circulating water pipeline 17 communicated with a water pressure loading system and a grouting pipeline 16 connected with a grouting system and extending into a stratum model experiment cavity 18 are respectively arranged at two ends of the steel-structured kettle body 12.
The stratum model experiment cavity 18 is made of flexible organic glass, is sealed by a flexible sleeve 19 and is isolated from a confining pressure medium, and the size diameter of the cavity is 150mm, and the length of the cavity is 1000 mm; the surface of the flexible sleeve 19 made of insulating materials is averagely provided with 10 layers and 160 resistivity test electrode probes 14 along the circumferential direction of the cylinder, and the resistivity test electrode probes are used for testing the complete distribution condition of a seepage field in the pores of the experimental consolidation body; simultaneously, 10 sets of ultrasonic probes 13 are arranged, and the specific arrangement is as shown in fig. 2(a) (b). The device is used for testing parameters such as wave velocity, dynamic elastic modulus, dynamic Poisson ratio and the like of the consolidation body in the cavity 18 in real time.
The confining pressure loading system comprises a confining pressure injection pump 1, a liquid storage tank 2 and a pressure sensor, a confining pressure medium (water or gas) is injected into a confining pressure cavity through a preformed hole at one end of the steel kettle body 12, and pressure gauges in the confining pressure cavity and on the injection pump 1 are installed to control and display in real time.
The circulating water loading system is connected with the stratum model experiment cavity 18, the circulating water pipeline 17, the liquid injection pump 3 and the pressure stabilizing device in series to form a pressurized water circulating loading system; pressure and flow sensors are respectively arranged at the positions of the experiment cavity 18, the water tank 4, the liquid injection pump 3 and the circulating water pipeline 17.
The surface and the interior of the experimental cavity 18 are respectively provided with an ultrasonic probe 13 and a resistivity test electrode probe 14 according to a certain arrangement mode, and the ultrasonic probe 13 and the resistivity test electrode probe 14 are connected with a data line through a sealing device and are connected with an ultrasonic signal generator 7, an ultrasonic signal collector 8, a resistivity tomography instrument 9 and a computer display 10 through a line channel arranged at the end head.
The method for evaluating the effect of the water-rich loose fractured coal-rock mass stratum grouting consolidation experiment comprises the following steps:
1) experimental cavity for manufacturing stratum model
A cylindrical cavity with the diameter of 150mm and the length of 1000mm is made of flexible organic glass, 10 layers and 160 resistivity test electrodes 14 are evenly arranged on the flexible insulating surface along the circumferential direction of the cylinder; simultaneously arranging 10 groups of ultrasonic probes 13, and leading out the electrode and probe connecting wires through sealing and reinforcement;
2) test model for building loose fractured coal and rock mass
Loading similar materials or loose sand bodies with different particle sizes into an experiment cavity 18 according to specific engineering coal measure strata, and compacting loose crushed coal rock mass through a pressure head 20 in a kettle so that the resistivity test electrode probe 14 and the ultrasonic probe 13 sensor are fully and effectively contacted with the coal rock mass;
3) the experimental cavity is arranged in the kettle, so that the position of the experimental cavity 18 and the position of the pressure head 20 are sealed and isolated from the confining pressure medium; starting the confining pressure injection pump 1, applying confining pressure step by step to a preset load, and monitoring the confining pressure through a pressure sensor arranged on the confining pressure injection pump 1; the compressive strength of the experimental cavity of the loose crushed coal-rock mass model is 8-10 MPa;
4) by starting the liquid injection pump 3 and the pressure stabilizing device, water is injected into the experimental cavity 18 through a ring-shaped radioactive water circulating water pipeline 17 preset at the upper end of the kettle body, and circulating stable water pressure is applied at a certain flow rate until the set water pressure is reached; the maximum water supply pressure of the circulating water pressure loading system is 0.5-1.0 MPa;
5) starting a grouting system, opening a grouting pump 5, grouting into the experiment cavity 18 along a grouting pipe according to certain grouting pressure and flow through a preset hole at the lower end of the kettle body, collecting and recording grouting pressure parameters, and performing data adjustment or stopping grouting according to actual conditions; simultaneously observing the water pressure and flow change data of the experimental cavity; the pressure of a grouting pump of the grouting system can be adjusted between 0 and 12.5MPa, the grouting flow is 6 to 12.6L/min, and the grouting pressure required by the experiment is 3.0 to 5.0 MPa.
6) Adjusting grouting parameters, namely grouting for multiple times, measuring the wave velocities of coal and rock masses at different positions in the experimental cavity 18 by using the ultrasonic signal generator 7 and the ultrasonic probe 13 after grouting is finished, and calculating the dynamic elastic modulus and the dynamic Poisson ratio parameters; and measuring the resistivity of different layers of the coal rock in the experimental cavity 18 by using the resistivity tomography instrument 9 and the resistivity test electrode probe 14, comparing and determining the internal pore distribution, the reinforcing range and the grouting diffusion path of the loose broken coal rock model, and evaluating the grouting consolidation effect.
7) Modifying the test parameters, and repeating the steps 3) to 6); and (4) until the water-rich loose crushed coal rock mass grouting consolidation experiment is completed.
The invention provides a method for realizing multi-field physical evolution law simulation test and quantitative evaluation of grouting effect in the chemical grouting process of the interior of the water-rich loose fractured coal rock mass, and provides scientific basis for grouting reinforcement parameter determination and effect inspection evaluation of the loose fractured coal rock mass in underground engineering.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. A method for evaluating the grouting consolidation experiment effect of a water-rich loose fractured coal rock mass is characterized by comprising the following steps:
1) experimental cavity for manufacturing stratum model
A cylindrical cavity is made of flexible organic glass materials, a plurality of layers and a plurality of resistivity test electrode probes (14) are evenly arranged on the flexible insulating surface along the circumferential direction of the cylinder; a plurality of groups of ultrasonic probes (13) are arranged at the same time, and the electrodes and probe connecting wires are led out through sealing and reinforcement;
2) test model for building loose fractured coal and rock mass
Loading similar materials or loose sand bodies with different particle sizes into an experiment cavity (18) according to specific engineering coal measure strata, and compacting loose crushed coal rock mass through a pressure head (20) in a kettle to ensure that a resistivity test electrode probe (14) and an ultrasonic probe (13) sensor are fully contacted with the coal rock mass;
3) the experimental cavity is arranged in the steel kettle body (12), so that the position of the experimental cavity (18) and the position of the pressure head (20) are sealed and isolated from a confining pressure medium; starting the confining pressure injection pump (1), applying confining pressure to a preset load step by step, and monitoring the confining pressure through a pressure sensor arranged on the confining pressure injection pump (1); the compressive strength of the experimental cavity of the loose crushed coal-rock mass model is 8-10 MPa;
4) by starting the liquid injection pump (3) and the pressure stabilizing device, water is injected into the experimental cavity (18) according to the set water pressure through a ring-shaped circulating water pipeline (17) preset at the upper end of the steel kettle body (12); the maximum water supply pressure of the circulating water pressure loading system is 0.5-1.0 MPa;
5) starting a grouting system, opening a grouting pump (5), grouting into an experiment cavity (18) along a grouting pipeline (16) according to certain grouting pressure and flow through a preset hole at the lower end head of a steel kettle body (12), acquiring and recording grouting pressure parameters, and adjusting the grouting parameters to perform multiple grouting; the grouting flow is 6-12.6L/min, and the grouting pressure is 3.0-5.0 MPa;
6) after grouting is finished, measuring wave velocities of coal and rock masses at different positions in an experiment cavity (18) by using an ultrasonic signal generator (7) and an ultrasonic probe (13), and calculating dynamic elastic modulus and dynamic Poisson ratio parameters; measuring the resistivity of different layers of the coal rock in the experimental cavity (18) by using a resistivity tomography instrument 9 and a resistivity test electrode probe (14), comparing and determining the pore distribution, the reinforcing range and the grouting diffusion path in the loose and broken coal rock model, and evaluating the grouting consolidation effect;
7) modifying the test parameters, and repeating the steps 3) to 6); and (4) until the water-rich loose crushed coal rock mass grouting consolidation experiment is completed.
2. The water-rich loose fractured coal-rock mass grouting consolidation experimental device adopted based on the method of claim 1 is characterized by comprising a steel kettle body (12), an experimental cavity (18) which is arranged in the steel kettle body (12) and loaded by a confining pressure loading system, a circulating water pressure loading system communicated with the confining pressure loading system, a grouting system communicated with the confining pressure loading system, an ultrasonic testing system and a resistivity tomography system which are connected to the experimental cavity (18); water pressure and chemical slurry are input into a stratum model experiment cavity (18), the wave velocity, dynamic mechanical parameters and resistivity information of coal strata in the experiment cavity in the grouting process are monitored in real time through an ultrasonic testing system and a resistivity tomography system, and the grouting reinforcement effect of the water-rich loose crushed coal rock mass is evaluated.
3. The grouting consolidation experimental device for the water-rich loose fractured coal and rock mass as claimed in claim 2, wherein the confining pressure loading system comprises a pair of pressure heads (20), the steel kettle body (12) and the experimental cavity (18) are clamped in the pressure heads (20) through bolts, and a circulating water pipeline (17) communicated with the circulating water pressure loading system, a grouting pipeline (16) communicated with the grouting system and a confining pressure pipeline (15) communicated with the liquid storage tank (2) are respectively arranged on the pair of pressure heads (20).
4. The experimental device for water-rich loose fractured coal and rock mass grouting consolidation of claim 3, wherein the confining pressure pipeline (15) is communicated with the liquid storage tank (2) through a confining pressure injection pump (1).
5. The experimental device for water-rich loose fractured coal and rock mass grouting consolidation of claim 2, wherein the experimental cavity (18) is a flexible organic glass cylinder, and the experimental cavity (18) is sealed by a plurality of flexible sleeves (19) made of layer insulation materials which are evenly arranged along the circumference direction of the cylinder, so that the loose fractured coal and rock mass in the experimental cavity (18) is isolated from the outside.
6. The water-rich loose fractured coal and rock mass grouting and consolidation experimental device as claimed in claim 2, wherein the grouting system comprises a slurry tank (6), a material suction pipe, a grouting pump (5), a material conveying pipe, an injection gun and an injection pipe, and the grouting system is communicated into the stratum model experimental cavity (18) through a grouting pipeline (16).
7. The experimental device for grouting and consolidating the water-rich loose fractured coal and rock mass according to claim 2, wherein the circulating water pressure loading system comprises circulating water pipelines (17) communicated with each other in the pressure heads (20) at two ends of the steel kettle body (12), and the circulating water pipelines (17) are communicated with the liquid injection pump (3) and the water tank (4).
8. The water-rich loose fractured coal rock mass grouting and consolidation experimental device as claimed in claim 2, wherein the ultrasonic testing system comprises an ultrasonic signal generator (7), an amplifier, an ultrasonic transducer and an ultrasonic signal collector (8); and ultrasonic probes (13) connected to a data acquisition system are respectively arranged on the surface and inside the experiment cavity (18).
9. The experimental device for water-rich loose fractured coal and rock mass grouting consolidation of claim 2, wherein the resistivity tomography system comprises a resistivity tomography instrument (9), a controller, a computer display (10), an electrode converter and a cable which are communicated with the experimental cavity (18), and resistivity test electrode probes (14) connected to a data acquisition system are respectively arranged on the surface and inside of the experimental cavity (18).
10. The water-rich loose fractured coal rock mass grouting and consolidation experimental device as claimed in any one of claims 2 to 9, wherein pressure and flow sensors are respectively arranged at the positions of the experimental cavity (18), the water tank (4), the liquid injection pump (3) and the circulating water pipeline (17).
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| CN110618250A (en) * | 2019-09-20 | 2019-12-27 | 龙岩学院 | Device and method for forming grouting reinforcement material under uniform loading condition |
| CN110618255B (en) * | 2019-10-24 | 2021-10-08 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Confining pressure test device for simulating stratum accumulation, installation method and test method |
| CN111141866B (en) * | 2020-01-14 | 2022-11-11 | 山东科技大学 | Test device and method for simulating spontaneous combustion process of coal seam and detection of high-temperature abnormal area |
| CN111487164B (en) * | 2020-04-21 | 2022-10-14 | 重庆大学 | Novel load-variable pressurizing grouting test method for crushed coal rock mass |
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| CN114152510B (en) * | 2021-12-28 | 2023-12-22 | 中国海洋大学 | Dynamic water grouting reinforcement model test device and test method for water-rich broken rock layer |
| CN114994751B (en) * | 2022-07-21 | 2023-01-31 | 中国矿业大学(北京) | Coal mine microseismic signal identification and classification method based on model experiment |
| CN115356238B (en) * | 2022-10-20 | 2023-02-07 | 四川藏区高速公路有限责任公司 | Grouting diffusion radius in-situ measuring device for fractured rock mass |
| CN116430004B (en) * | 2023-03-17 | 2024-01-23 | 中国科学院武汉岩土力学研究所 | Grouting test device and method under hydraulic shear critical condition |
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| CN104237486B (en) * | 2014-10-10 | 2016-08-17 | 山东科技大学 | A kind of closing boring Mining failure simulation test device |
| CN107389898B (en) * | 2017-07-24 | 2020-08-11 | 西安科技大学 | Visual simulation experiment device and method for consolidation grouting diffusion rule of flowing water quicksand stratum |
| CN107782641B (en) * | 2017-11-24 | 2019-06-07 | 中国矿业大学 | A kind of loose media osmotic grouting simulation test device |
| CN208206964U (en) * | 2018-01-19 | 2018-12-07 | 合肥工业大学 | Simulate high-pressure slip-casting device under buried stratum river channels |
| CN108287230A (en) * | 2018-03-09 | 2018-07-17 | 中国矿业大学(北京) | Fissured waterbearing stratum multiple holes grouting reinforces Multifunctional crab formula testing stand |
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