71 results about "Cave-in" patented technology

The invention discloses a tunnel blasting simulation method and system for a karst area, and relates to the field of tunnel blasting simulation, and the method comprises the steps: building a three-dimensional geologic model of the karst area, and generating an initial ground stress distribution rule through numerical simulation; generating refined initial crustal stress field data; calculating stress wave intensity and time sequence data generated by explosion; acquiring stress wave propagation data; calculating the surrounding rock damage degree and the crack initial position and direction; simulating the surrounding rock crack propagation process, and calculating the penetration probability and the propagation speed of the crack near the karst cave in combination with the karst cave characteristic parameters; analyzing the surrounding rock stability and damage evolution trend of the karst cave area; and optimizing explosive source item parameters and stress wave propagation boundary conditions, and generating a karst area tunnel blasting simulation result. According to the method, the influence of the karst cave on stress wave propagation is accurately simulated, powerful support is provided for optimizing a blasting scheme and improving construction safety and efficiency, and the method has important guiding significance on tunnel engineering under complex geological conditions.

The invention discloses a cave depot type data center based on underground river construction and a construction method and an operation method thereof, and belongs to the technical field of cave depot type data center construction. The data center comprises a mountain body, an underground river is developed in the mountain body, the underground river flows through a karst cave in the mountain body, a plurality of equipment storage tunnels are arranged on one side or two sides of the underground river in the mountain body, and the equipment storage tunnels are communicated with the karst cave through slope connecting tunnels. An equipment cabinet and a liquid heat exchanger are arranged in the equipment storage tunnel, a river water conveying assembly is connected to the liquid heat exchanger, and the end, away from the liquid heat exchanger, of the river water conveying assembly penetrates through the slope connection tunnel and extends into the underground river. The liquid cooling mode is adopted for cooling and heat dissipation of the equipment cabinet, the direct temperature control mode remarkably improves the heat dissipation and cooling effects of the IT equipment cabinet, meanwhile, the heat exchange efficiency is high, and the operation energy consumption of a data center can be reduced.

The present invention discloses a cave-type data center constructed based on an underground river, as well as its construction method and operation method, belonging to the technical field of cave-type data center construction. The data center includes a mountain body, in which an underground river is developed, and the underground river flows through a karst cave in the mountain body. On one side or both sides of the underground river in the mountain body, a number of equipment storage tunnels are provided. The number of the equipment storage tunnels are respectively connected to the karst cave through a slope connecting tunnel. An equipment cabinet and a liquid heat exchanger are arranged in the equipment storage tunnel. A river water conveying assembly is connected to the liquid heat exchanger. One end of the river water conveying assembly far away from the liquid heat exchanger passes through the slope connecting tunnel and extends into the underground river. The liquid cooling method is used to cool and dissipate heat from the equipment cabinet. This direct temperature control method significantly improves the heat dissipation and cooling effect on the IT equipment cabinet. At the same time, the heat exchange efficiency is high, and the operation energy consumption of the data center can be reduced.

The invention discloses a low-carbon cave depot type data center based on karst cave layout and a construction method and an operation method of the low-carbon cave depot type data center, and belongs to the technical field of cave depot type data center construction. The data center comprises a mountain body, an underground river is developed in the mountain body, the underground river flows through a karst cave in the mountain body, a bridge type supporting platform is arranged in the karst cave, the elevation of the top face of the bridge type supporting platform is higher than the highest water level of the underground river, and an equipment cabinet and a liquid heat exchanger are arranged on the bridge type supporting platform. The liquid heat exchanger is connected with the equipment cabinet through a cooling liquid conveying assembly, the liquid heat exchanger is connected with a river water conveying assembly, and the end, away from the liquid heat exchanger, of the river water conveying assembly extends into an underground river. The natural karst cave is fully utilized to build the cave depot type data center, the excavation volume of the cave depot type data center is reduced, and the building cost of the cave depot type data center can be remarkably reduced.

The invention relates to a method, device and equipment for determining the safety coefficient range of a karst cave slope and a medium. The method comprises the steps that the maximum value and the minimum value of the slope in the X direction and the Y direction are obtained; based on the maximum value and the minimum value of the slope in the X direction, the slope is divided in the X direction according to the vertical division interval, and a plurality of vertical units are obtained; based on the maximum value and the minimum value of the slope in the Y direction, unit bodies with random heights are generated in all the vertical units; according to the unit bodies, determining the distribution condition of the rock-soil body and the karst cave in each vertical unit, and constructing a slope karst cave simulation model; performing assignment calculation on the slope karst cave simulation model to obtain a slope safety coefficient; and a plurality of groups of slope safety coefficients are obtained through iterative calculation, and the range of the slope safety coefficients is determined based on each group of slope safety coefficients. Reliable data support can be provided for engineering design of the karst cave slope, and safety and engineering economy are both considered.

The invention relates to a form-controllable mining system and mining method for a liquid-filled well cave in a deep stratum. The system comprises an expansion operation device, an ore particle lifting system and at least one process well, the extended operation device comprises an extended mining device and / or an extended collecting device; the expansion operation device can move along the process well and can be conveyed to an operation position through the process well; the extended excavation device is used for realizing chamber excavation along the process well; or the extended collecting device is used for collecting or sucking the ore particles in the chamber along the process well. The method and the device have wide prospects in the fields of deep stratum mining, in-layer mining of the underlying strata of the ocean and deep stratum space resource utilization.

The invention discloses an anti-deviation drilling device suitable for a karst development area and a using method of the anti-deviation drilling device, and relates to the technical field of geological exploration and geotechnical engineering construction.The anti-deviation drilling device comprises a base, and a supporting frame is fixedly connected to the top of the base. According to the device, the two ends of a first hydraulic push rod are fixedly connected with guide rods, hydraulic cylinders are embedded in the guide rods, when a motor drives a first drill rod and a second drill rod to rotate, a bearing rotates along with the second drill rod, a first fixing ring does not rotate, and the distance between the second fixing ring and the bearing can be adjusted through the first hydraulic push rod; the distance between one side of the detection plate and the inner wall of a drill hole can be adjusted through stretching and retracting of the hydraulic cylinder, so that one side of the detection plate is attached to the inner wall of the drill hole, the second drill rod and the first drill rod are rapidly straightened, and the deviation prevention effect during drilling is achieved; whether a karst cave exists in front or not is judged, timely avoidance of the drill bit is facilitated, and the drill falling risk during use of the drill bit is reduced.

The invention relates to a method for generating a karst cave 3D printing digital model, a storage medium and equipment, and the generation method comprises the following steps: analyzing a seismic data file in an SEGY format; arranging and storing X and Y coordinates, trace gathers (CDP) and seismic attribute data of a specified main measuring line seismic interpretation profile (Inline) and a tie line seismic interpretation profile (Xline) corresponding to each seismic data point in an index mode; generating a corresponding orthogonal grid model on the basis of the seismic data points; searching and extracting a karst cave in the orthogonal grid model according to the seismic data information of the orthogonal grid model and each grid unit, then identifying all boundary surfaces participating in forming a karst cave boundary, and processing the boundary surfaces to obtain a karst cave contour represented by a triangular grid; and outputting and storing the three-dimensional contour of the karst cave oil reservoir model obtained in the step 3.4 according to an STL file format. The STL model is constructed by identifying and analyzing the seismic data in the SEGY format, and a new tool is provided for smooth development of a 3D printing physical model.

The invention discloses a bridge pile foundation karst cave treatment method, and relates to the technical field of buildings. Comprising the following steps: acquiring three-dimensional model information of a karst cave; determining a filling mode of the karst cave according to the three-dimensional model information of the karst cave; the karst cave is filled according to the filling mode and the corresponding filling slurry; wherein the fluidity of the filling slurry is 220 to 300 mm. The three-dimensional model information of the karst cave is obtained, the karst cave is filled according to the filling mode and the corresponding filling slurry, accurate filling can be conducted according to the actual shape of the karst cave, waste of filling materials is reduced, and localized and quantitative controllable treatment is achieved. The fluidity of the filling slurry is 220-300 mm, so that the filling slurry can be in a flow state and flow among complex gullies in the karst cave, filling of the karst cave is achieved, and the filling strength is improved.

The present invention discloses a method for effectively disassembling a nuclear magnetic resonance relaxation time spectrum, comprising the following steps: S1, constructing a probability density function of pores and caves according to the distribution characteristics of pores and caves in a core nuclear magnetic resonance T2 spectrum; S2, setting the sum of the nuclear magnetic spectrum areas to 1, randomly generating n data points within the interval of pore distribution, and dividing all the data points into multiple data sets by screening peak values; S3, calculating a likelihood function; S4, calculating a priori probability that each data point belongs to a pore or a cave; S5, updating various parameters in an iterative method using the priori probability; and S6, calculating a new logarithmic likelihood based on the updated parameters, and updating the expected E in the iterative method. p and E v , expected E p and E v Repeat steps S2 to S5 until the convergence condition is met and the iteration is terminated. The present invention combines nuclear magnetic resonance testing with an iterative method to decompose the nuclear magnetic resonance spectrum, thereby improving the accuracy of the spectral shape distribution.

The utility model relates to the technical field of prestressed anchor cables, and specifically, to a prestressed anchor cable used for supporting slopes in karst areas. It comprises a retaining structure, and an enlarged head type prestressed anchor cable structure is arranged between the retaining structure and the slope; after the borehole is continuously drilled and passes through part of the karst caves until a stable rock layer area without karst caves within a certain range is found, an expansion section is constructed, and a water stop strip is wrapped around the outer side of one end of the corrugated pipe and then inserted into the borehole, and the anchor cable body is connected to the bearing body and then penetrated into the expansion section from the corrugated pipe, and cement slurry is injected from the corrugated pipe until it is full, and the anchor cable body is locked in the borehole. The utility model has a simple structure and a reasonable construction, and can realize the construction of prestressed anchor cables in karst areas, does not require the prior treatment of karst caves, can provide effective pre-tightening force, and can provide a large anchoring force, so that the high slopes in the karst area can effectively control deformation after the prestressed anchor cables are applied, improve the overall stability of the slopes, do not waste cement slurry and fill karst caves, and are economical and applicable.

The invention discloses an intelligent identification method for geometric parameters of a karst cave in an engineering construction area, and relates to the technical field of foundation pit engineering, and the method comprises the steps: carrying out the preprocessing of a karst cave parameter data set, and extracting key feature parameters; solving a forward mapping model among karst cave parameters, ground surface settlement displacement and foundation pit side wall inclination displacement through partial derivative to obtain a kernel function, and constructing a nonlinear mapping relation; and performing iterative optimization on the initial parameters by adopting a multi-path random jump search algorithm, and performing inversion to obtain optimal karst cave geometric parameters matched with actual monitoring data. According to the method, through combination of an intelligent optimization algorithm and a mapping model, accurate identification of karst cave parameters is realized, and reliable technical support is provided for safety evaluation of foundation pit engineering and drilling of a soil layer.

The utility model provides an underground cavern pressure reduction structure based on artificial cave building, which comprises a cavern, and small-size drill holes and large-size pressure reduction caves are arranged on the left side and the right side of the cavern at equal intervals from the near to the distant; and a geological steel pipe is placed in the small-size drill hole, consolidation grouting is conducted between the pipe wall of the geological steel pipe and the hole wall of the drill hole, and the hole is sealed. The device has the advantages that the stress concentration position is determined through numerical simulation analysis, and the small-size drill holes and the large-size decompression caves are sequentially arranged perpendicular to the cavern wall, so that the stress concentration degree is reduced, the stress peak value migrates to the surrounding rock in the deeper part, the stress distribution in the surrounding rock is more uniform, and the surrounding rock in the larger and deeper range participates in bearing; excessive supporting is avoided, and economic and safe operation of the underground cavern is guaranteed.

The present invention discloses a method for predicting karst caves in the karst area during shield tunneling, belonging to the technical field of karst cave prediction. In the present invention, reflection waves in the karst area are collected by geophones during the operation of the shield machine, and the instantaneous frequency, instantaneous amplitude, and instantaneous phase of P-waves and S-waves are calculated respectively, reflecting the changes in frequency, amplitude, and phase at each moment. By capturing the phase reversal coefficient, amplitude change coefficient, frequency change coefficient, and energy attenuation coefficient of P-waves, as well as the amplitude change coefficient and energy attenuation coefficient of S-waves, the response characteristics of P-waves and S-waves to karst caves can be effectively reflected. Combining these characteristic coefficients with the processing of the karst cave prediction model can further improve the accuracy of karst cave prediction and provide a strong guarantee for the safety of shield construction.

The application discloses a kind of geological tube wave detection signal processing methods for vertical string-shaped karst cave in karst topography, applicable to geological exploration field, this method is mainly by first carrying out wavelet threshold denoising method processing to vertical string-shaped karst cave in karst topography geological tube wave detection signal to remove noise, mean filtering is carried out to obtain direct tube wave waveform and reflected tube wave waveform, two-dimensional filtering and fourier transform are carried out to reflected tube wave waveform to obtain uplink reflected tube wave waveform and downlink reflected tube wave waveform, finally waveform is analyzed to obtain time-depth curve, barycentric frequency-depth curve and reflection coefficient-depth curve to be used for the quantitative interpretation of tube wave detection result.The tube wave signal processing method proposed in the application has the advantages of strong anti-interference, small error, etc., compared with the traditional tube wave signal processing method, and has better applicability under the geological conditions of vertical string-shaped karst cave in karst topography.

The present invention discloses a tunnel blasting simulation method and system for karst areas, which relates to the field of tunnel blasting simulation. The method comprises: establishing a three-dimensional geological model of the karst area, generating the initial geostress distribution law through numerical simulation; generating refined initial geostress field data; calculating the stress wave intensity and time series data generated by the explosion; obtaining stress wave propagation data; calculating the degree of surrounding rock damage and the initial position and direction of the crack; simulating the surrounding rock crack propagation process, and calculating the crack penetration probability and propagation speed near the cave in combination with cave characteristic parameters; analyzing the surrounding rock stability and damage evolution trend in the cave area; optimizing the explosive blast source term parameters and stress wave propagation boundary conditions, and generating tunnel blasting simulation results in the karst area. By accurately simulating the influence of caves on stress wave propagation, the present invention provides strong support for optimizing blasting plans and improving construction safety and efficiency, and has important guiding significance for tunnel engineering under complex geological conditions.

The application provides a cave sampling device for prospecting, and relates to the field of prospecting.The sampling device is mainly composed of an upper fixing disc, a lower fixing disc, a lead screw, a light screw, a motor, a sliding block, a sampling drill, a transmission mechanism, a feeding mechanism and a material receiving chute.The upper fixing disc and the lower fixing disc are used for fixing the sampling device in a cave.The sliding block, the lead screw, the light screw and the motor form a linear motion mechanism moving in the vertical direction.The feeding mechanism and the transmission mechanism are used for driving the sampling drill to sample.The material receiving chute is arranged below the sampling drill and is used for collecting the falling geological samples.The application realizes continuous sampling of the cave in a certain depth interval, and can put the drilled geological samples into the corresponding height storage compartment, so that the geological exploration personnel can intuitively and clearly establish the relationship between the sampled geological samples and the cave depth.The application has a clever and compact structure, and minimizes the outer diameter of the sampling device, thereby greatly reducing the excavation cost of the cave.

This invention discloses an auxiliary construction device for concealed karst cave pile foundations, comprising an acid etching tube section, which is a tube structure for swirl-dissolving the outer shell of the karst cave, with a connecting head at its upper end; and a connecting tube section, which is threadedly connected to the upper end of the acid etching tube section, with both inner and outer tubes communicating with the acid etching tube section. Through the arrangement of the acid etching tube section and the connecting tube section, this invention not only guides the acid water along a designated path, allowing it to scour and dissolve the shell of the karst cave in a trailing swirling motion, achieving rapid dissolution of the karst cave shell, but also allows for the extraction and recovery of neutralizing slurry into the mixing chamber and mixing during the dissolution process. Simultaneously, it enables the addition of reinforcing materials to the slurry and the application, filling, and reinforcement of the inner wall of the karst cave with the mixed concrete slurry, thereby ensuring the safety and stability of the duct after dissolution and avoiding the adverse effects of cracks in the karst cave shell.

The present invention relates to a method for analyzing the stability of pile-foundation karst cave roofs in deep-covered karst sites, comprising the following steps: S1, collecting and analyzing geological data in the project area to understand the macroscopic development characteristics of the karst in the site; S2, conducting site exploration using an optimized transient electromagnetic method; S3, conducting site seismic reflection exploration; S4, delineating the karst development range based on karst anomaly locations determined by comparison between the optimized transient electromagnetic method and the seismic reflection method; S5, based on the pile foundation design plan, verifying the stability of the roof under the shear bearing capacity of the roof under the limit equilibrium condition for karst caves or soil caves with potential collapse in the roof rock mass below the pile end, and for karst caves in limestone layers with thick roof rock layers; S6, verifying the safe thickness of the roof for fractured rock masses with developed fissures and thick, relatively strong, and intact rock masses; and S7, determining the safe thickness of the cave roof. The present invention effectively controls pile length, reduces project costs, and shortens construction period.

1. Name of the product in this design: Camera (W). 2. Applications of this design: for inspecting the interior of pipes such as water supply pipes, air conditioning pipes, cable pipes, pipe vacuum systems, lead industry pipes, underground pipes in buildings, rescue work in confined spaces, exploration of underground caves in the wild, and underwater riverbed scientific research. 3. The key design feature of this product is its shape. 4. Images or photos that best illustrate the design key points: usage status reference diagrams.

This application relates to a method for treating karst caves in tunnels, belonging to the field of underground structure engineering technology. The method includes dividing the existing tunnel floor slab into multiple construction sections; in the current construction section, multiple construction holes are opened in the floor slab using a skip-section method, with the size of the construction holes configured to provide operational space for rebar splicing and waterproofing layer repair; grouting is performed into the soil beneath the existing tunnel through the construction holes; after the grouting is deemed satisfactory, the floor slab rebar and waterproofing layer at the construction holes are repaired; after completing the treatment of the current construction section, the process is repeated in the next construction section until all construction sections are treated. By opening relatively large construction holes and specifically configuring sufficient operational space for rebar splicing and waterproofing layer repair, even if the floor slab rebar is cut during construction, standardized splicing operations and waterproofing layer restoration can still be performed using this space.

The present application relates to the safety factor range determination method, device, equipment and medium of karst cave slope, method includes: obtaining the maximum and minimum of the slope in X direction, Y direction;Based on the maximum and minimum of the slope in X direction, according to the vertical division interval, the slope is divided along X direction, and a plurality of vertical units are obtained;Based on the maximum and minimum of the slope in Y direction, the unit body of random height is generated in each vertical unit;According to the unit body, the distribution of rock-soil mass and karst cave in each vertical unit is determined, and the simulation model of karst cave slope is constructed;The simulation model of karst cave slope is calculated, and the safety factor of the slope is obtained;A plurality of groups of safety factors of the slope are obtained by iterative calculation, and the range of the safety factor of the slope is determined based on each group of safety factors of the slope.The present application can provide reliable data support for the engineering design of karst cave slope, and safety and engineering economy are taken into account.

The utility model relates to the technical field of karst cave grouting, in particular to a grouting anti-pollution device for a shield to penetrate through a karst area earth surface karst cave, which comprises a connecting bin and an inserting pipe, a supporting rod is fixedly connected to the outer surface of the connecting bin, an adjusting rod is sleeved on the surface of the supporting rod through threads, and a surface passage of the inserting pipe is connected with an air injection pipe. The outer surface of the gas injection pipe is sleeved with a gas conveying pipe, the outer surface of the insertion pipe is sleeved with an abutting disc, the outer surface of the abutting disc is connected with an abutting rod in a penetrating mode, and a movable groove is formed in the surface of the gas injection pipe in a penetrating mode. The elastic rotation effect of the abutting block on the gas injection pipe is achieved through the connection of the abutting block and the supporting spring, the sleeving and sealing operation of the gas delivery pipe on the gas injection pipe is completed through the connection of the supporting spring and the sealing ring, and the regulation and control effect of the using length of the binding belt on the supporting block is achieved through the connection of the control rod and the pressing plate. And the angle limiting performance of the grouting pipe used on the connecting bin is improved.

The invention relates to the technical field of tunnel mining, and particularly discloses a highway tunnel karst cave cavity segmented plugging device and method.The highway tunnel karst cave cavity segmented plugging device comprises a pouring assembly and a sealing plate, the sealing plate is used for segmenting a karst cavity and achieving segmented plugging, and the top of the sealing plate is provided with a fixing piece used for fixing the sealing plate. The uniform spraying assemblies are arranged on the inner side and the upper portion of the sealing plate, the uniform spraying assemblies are used for uniformly spraying slurry for plugging to the inner wall of the karst cave, each uniform spraying assembly comprises a fixing pipe fixed to the inner side of the sealing plate, a rotating disc is arranged on the inner side of each fixing pipe, a lifting pipe is arranged in each rotating disc, and a rotating connector is installed at the top of each lifting pipe. Impact vibration caused by the fact that grout centrally falls on the bottom of the karst cave can be avoided, the possibility of collapse in the karst cave is reduced, the construction safety is improved, meanwhile, the adhesion between mortar and the inner wall of the karst cave during later grouting can be improved, and the firmness of mortar filling can be improved.

The invention relates to the technical field of karst treatment, and discloses a karst cave filling treatment method in order to solve the problems that in the prior art, the filling treatment effect is poor, and the construction period is long. After the boundaries of the karst caves are found through drilling, feeding drill holes are formed in the boundaries of the karst caves at the interval of 5 m and used for pumping concrete. The double-layer sleeve is installed after the feeding hole is formed, the bottom of the outer-layer sleeve is installed on the rock surface, and then the bottom of the inner-layer sleeve is installed in the karst cave, is smaller than or equal to 2 m away from the bottom of the karst cave and is smaller than or equal to 1 m away from filling in the cave. The inner casing pipe is connected to a concrete pump truck, concrete is pumped into the karst cave through the inner casing pipe, and a gap between the double-layer casing pipes can play a role in exhausting and draining. According to the karst cave filling treatment method, one-hole multi-casting treatment can be carried out on a plurality of string-bead karst caves in a mode of lifting pipes from bottom to top, meanwhile, concrete is pumped through a pressure pump, karst water and gas in the caves can be effectively discharged, and fillers in the caves are compacted. The construction period is greatly shortened; and the treatment effect is better.

The invention discloses a method and a device for simplifying a numerical well testing geological model of a fracture-vug type oil and gas reservoir. The method comprises the steps that according to the radius of a karst cave in the fracture-vug type oil and gas reservoir and the distance between the karst cave and a test well, the bottom hole pressure derivative sinking amplitude caused by the karst cave is determined according to the corresponding relation between the bottom hole pressure derivative sinking amplitude caused by the karst cave and the corresponding relation between the karst cave radius and the distance between the karst cave and the test well; the sinking amplitude of the bottom hole pressure derivative is the sinking amplitude of the lowest point in a double logarithmic curve of the bottom hole pressure derivative and time relative to a set bottom hole pressure derivative baseline; and in the process of establishing the numerical well testing geologic model of the well testing, deleting the karst cave of which the sinking amplitude caused by the bottom hole pressure derivative is smaller than a set sinking amplitude threshold value. According to the method, the concept of the sinking amplitude of the bottom hole pressure derivative caused by the karst caves is innovatively defined, the karst caves are screened on the basis of the concept, and reasonable simplification of the numerical well testing geologic model of the fracture-vug type oil and gas reservoir is achieved.

The present application discloses a method and device for identifying fractures and caves in Carboniferous volcanic rocks. Among them, the method includes: acquiring seismic data; establishing a three-dimensional seismic attribute data volume of fractures and caves in Carboniferous volcanic rocks based on the seismic data; extracting a multi-scale fracture and cave data volume from the three-dimensional seismic attribute data volume; and identifying the development area of fractures and caves in Carboniferous volcanic rocks based on the multi-scale fracture and cave data volume. The present application solves the technical problem that the existing fracture and cave prediction methods cannot accurately predict fractures and caves in Carboniferous volcanic rocks.

The invention discloses a reinforcement construction method in a super-large hidden karst cave near a tunnel, which comprises the following steps: S1, drilling a drill hole leading to the karst cave in a structure on one side of the tunnel near the karst cave, and installing a reinforcement member through the drill hole to form a reinforcement structure for supporting a rock-soil body on the top surface of the karst cave; s2, after the anchoring end of the reinforcing component enters the karst cave, the anchoring end is tightly attached to the rock wall of the karst cave through structural adjustment, and a protective material is filled to seal a gap between the anchoring end and the rock wall; s3, a gap between the reinforcing component and the drill hole is reinforced, a monitoring device is installed to monitor the stress state of the reinforcing component, and the stability of the reinforcing structure in the tunnel operation period is ensured; according to the reinforcement construction method in the oversized hidden karst cave near the tunnel, the friction force between the claw-shaped component and the rock wall of the karst cave is further enhanced, the anti-sliding capacity of the anchoring end is remarkably improved, and the long-term stability of a supporting structure is ensured.

The present invention discloses a method for preventing water inrush by grouting loosely filled caves in tunnels. By zoning and managing water-rich caves, the water-rich nature of the caves is classified according to the different water yields from geophysical exploration and drilling. Furthermore, grouting materials are selected based on the water pressure, water volume, and physical properties of the different water-rich zones. This method achieves targeted and clear grouting of water-rich caves in karst areas, eliminating the drawbacks of previous methods, such as unfounded material selection, unclear planning, and unsatisfactory management results. The present invention solves the problems of existing cave grouting reinforcement slurries, such as uneven diffusion, incomplete solidification, and significant damage from dynamic water scour.

This invention belongs to the field of karst cave treatment technology and discloses a method for detecting and treating karst caves in the anchor cable area of ​​a limestone stratum retaining structure. The method includes the following steps: S1, delineating the karst cave treatment area in the anchor cable area; S2, advanced drilling in the anchor cable area; S3, exploring the karst cave boundary in the anchor cable area; S4, grouting treatment of the karst cave in the anchor cable area; S5, detecting the grouting effect in the karst cave in the anchor cable area; S6, anchor cable construction and anchor cable bearing capacity testing. Through these six steps, the detection and treatment of karst caves in limestone areas can be effectively achieved, ensuring the stability of the anchor cables in the limestone stratum. This effectively reduces the risk of collapse of the anchor cables during the construction of the retaining structure, reduces the rapid development of karst caves under the disturbance of anchor cable construction, and reduces the risk of water inrush and gushing water. It also effectively improves the bearing capacity and deformation resistance of the anchor cable foundation pit support in limestone stratum retaining structures, and enhances the safety of underground structure construction.