183 results about "Dam break" patented technology

The invention relates to a fluid thermal motion simulation system based on the SPH algorithm and belongs to the field of thermodynamics simulation and visual flowing. The method comprises the steps of conducting modeling on fluid according to calculation examples and calculation requirements, solving a fluid control equation and a modified equation based on the SPH algorithm to achieve analogue simulation of fluid Lagrange thermal motion, and finally showing the thermal motion process of fluid visually in the form of graphs and animations by means of the visual processing technology. Compared with an existing meshing CFD simulation system, the fluid thermal motion simulation system has the advantage that a more reasonable simulation result can be obtained when the system is used for simulating certain advanced non-linear problems such as the jet flow problem, the ocean motion problem, the dam break problem and the dynamic boundary problem. Compared with an existing mesh-free CFD simulation system, the fluid thermal motion simulation system has the advantages that calculation stability and calculation accuracy are improved, and the gap of fluid thermal motion simulation and turbulent flow simulation is filled.

An earth-rock dam break centrifugal model test analysis method is characterized by comprising the following steps that (1) an earth-rock dam break test special model box is arranged; (2) the working principle and the stress similarity criterion of a centrifugal machine are used, an earth-rock dam prototype and a 1/N-contraction-scale centrifugal test model are obtained, under the Ng centrifugal acceleration condition, the linear size ratio of the model and the prototype is 1/N, and the earthing stress of the model and the prototype is the same; (3) according to the seepage similarity criterion, the obtained permeability coefficient of centrifugal model earth is N times of the permeability coefficient of prototype earth; (4) according to the shearing strength similarity criterion, the particle diameter of model cohesiveless earth-rock materials is reduced by N times; and (5) according to the water flow similarity criterion, the similarity criterion of commonly-used physical quantity in an earth-rock dam break centrifugal model test is obtained. The method is not limited or restricted by fields, a large amount of earth and a large number of water resources are of no need during testing, and the method has the advantages of being low in cost and short in time.

The invention discloses an adjustable multifunctional landslip river blocking and weir dam breaking mechanism testing device and a testing method thereof, and relates to the technical field of landslip model simulating devices. The testing device comprises a model box, a model driving mechanism, a landslip simulating mechanism and a weir simulating mechanism; the model box is arranged at the top end of the landslip simulating mechanism, and the weir simulating mechanism is arranged at the tail end of the landslip simulating mechanism; the model driving mechanism is connected with the model box and used for driving a prefabricated sample in the model box. According to the testing device and the testing method, the friction colliding breaking phenomenon and high-speed colliding stopping accumulation shown in the motion process of high-speed landslip can be visually revealed, and the whole process of landslip river blocking and dam breaking can be revealed.

The invention belongs to the field of virtual geographical environment research of a geographic information system, particularly relates to an outburst flood routing simulation and analysis technique, and relates to a cellular automata based rapid outburst flood routing simulation and analysis method. By the method, the problem that an error between a final numerical analysis result and actual water regimen is large due to randomness of cellular scale partitioning at present can be solved; meanwhile, accurate and rapid comprehensive simulation and analysis can be performed on dam-break flood routing and influences by means of reasonable setting of a cellular neighborhood range and combination of spatial analysis capacity of a GIS (geographic information system) and spatial-temporal modeling capacity of cellular automata simulation. The method includes construction of a two-dimensional cellular automata simulation model, optimization of a cellular spatial data structure and virtual geographical environment based visual simulation and analysis.

The invention discloses a simulation tester for similar damage of tailings dam bursting, which is provided with a simulation reservoir, and the dam of the simulation reservoir is connected with a simulation cleugh. The simulation tester for similar damage of tailings dam bursting is characterized in that the bottom of the simulation reservoir at the tail of the reservoir is provided with a jacking pushrod; the jacking pushrod is arranged on a hydraulic cylinder; the simulation cleugh consists of at least two grooves connected end to end in sequence; the neighboring grooves are connected by an adjustable joint; the dam of the simulation reservoir consists of a fixed bracket and at least one movable baffle. The simulation tester for similar damage of tailings dam bursting has the obvious effects of strong compatibility, simple structure, low cost, easy maintenance, and convenient operation, can simulate tailings reservoirs with different heights and volumes, and can all obtain the data like fluid state evolution characteristics of slurry out of the burst dam, the stress field and flow field distribution rules during the moving process of slurry, and the relationship of the alluvial fan scope of slurry and sedimentary thickness with the moving distance of slurry when facing to the grooves of the tailings dam with different bursting widths, directions and slopes.

The invention belongs to the field of hydraulic experimental model facilities and particularly relates to an automatic control type circulating water tank for simulating the instantaneous dam break. The circulating water tank comprises a water tank, a gate, a water level control system and a gate lifting control system. The water level control system comprises a water injection pipe, a water inlet pipe and a water guide pipe which are connected through a three-way pipe fitting, wherein the water guide pipe is connected with a circulating water pump. The water level control system further comprises a gate upstream water level gauge and a gate downstream water level gauge, wherein the gate upstream water level gauge and the gate downstream water level gauge are respectively arranged in a gate upstream water tank and a gate downstream water tank. The gate lifting control system comprises a vertical rack arranged on the front surface of a gate door plank and matched with the driving gear of a motor, and a lifting guide rail fixedly erected on the water tank along a guide rail. During the lifting process of the gate door plank, a pair of vertical guide bars on the back surface of the gate door plank are always fittingly kept in the vertical guide grooves of the lifting guide rail. An automatic air drying device is arranged in the gate downstream water tank, so that the conduction of dry bed experiments is facilitated. The circulating water tank is stable, automatic and efficient.

The invention provides a method for eliminating risk of dam break, and belongs to the field of flood fighting of an earth-rock dam in hydraulic engineering. In the method, a drainage channel is pre-arranged in the case of higher overtopping risk of the earth-rock dam, or a drainage channel is emergently arranged before the earth-rock dam reaches a second stage of dam break due to overtopping so as to lower the reservoir level. The method mainly comprises the following steps of: (1) determining the position of a drainage groove and the size of a drainage groove opening; (2) anchoring waterproof geotextile at the predetermined position of the drainage groove body at a downstream dam slope by a continuous anchor rod; (3) carrying out paving protection or riprap protection on a dam toe; and (4) lowering elevation of a dam crest by blasting or machinery excavation so as to form the drainage groove opening. By adopting the brand-new passive-drainage emergency rescue method in case of earth-rock dam break, the construction period is shortened, and the risk of dam failure can be prevented in the case of forced overflow of the earth-rock dam so as to guarantee safety of life and property of people in the downstream.

The invention relates to a debris flow dam breach simulation experimental device under different gully bed forms and belongs to the technical field of geotechnical engineering and disaster prevention.The debris flow dam breach simulation experimental device under the different gully bed forms comprises a conveying device, a stirring device, a dam breach simulation device, a lifting device and a cleaning and recycling device. Debris flow samples are conveyed to the stirring device through the conveying device and stirred, and stirred debris flow is put into an accommodating groove so as to besubject to a debris flow dam breach simulation experiment. The lifting device and different simulated gully bed surfaces can simulate dam breach simulation experiments under different gully bed gradient and roughness working conditions, and experimental data can be automatically collected in the whole process. After the experiment is finished, the device can be cleaned by a spray nozzle, and residual waste can be recycled through a recycling water tank at the same time as a relatively environmentally friendly manner. The debris flow dam breach simulation experimental device can be used to simulate the debris flow simulation experiments under the different gully bed gradient and roughness working conditions, and data in the debris flow occurrence process can be comprehensively collected.

The invention discloses a dam break grading early-warning index extraction method for a homogeneous earth dam. The method comprises the steps that a sliding window method is used for dividing a value measuring sequence, a earth dam monitoring physical quantity sliding window matrix is extracted based on principal component analysis (PCA) or kernel principal component analysis algorithm (KPCA), and the evolution of the principal component number/principal component matrix norm with earth dam conditions on the basis of 85% contribution rate is determined. Actual dam break tests indicate that the enlargement and the sudden changes of the two indexes correspond to the condition deterioration and the ultimate break of an earth dam respectively, and it is full demonstrated that the principal component number or the principal component matrix norm can be used as the first-grade early-warning index and the second-grade early-warning index for the safety condition of the earth dam; mutual checking can be conducted between the principal component number and the principal component matrix norm, wherein the first-grade early-warning index corresponds to the earth dam condition deterioration, and the second-grade early-warning index corresponds to the earth dam break.

The invention discloses an experimental water channel device for simulating instantaneous and complete break of a dam. The experimental water channel device for simulating instantaneous and complete break of the dam comprises a water channel, a baffle and a buoyancy twisting device. A support is arranged in the water channel, the baffle is fixed at the bottom of the water channel through a hinge device, the buoyancy twisting device is arranged on the support and comprises bearings, bolts, floating rods and floating balls, the buoyancy twisting device is fixed on the upper portion of the support in the water channel through the bearings, each floating rod and each bearing are fixed together, one end of each floating rod is connected to each bolt through each bearing, and the other end of each floating rod is connected to each floating ball. In the initial phase, the floating balls are vertically downward, and the baffle is perpendicularly fixed in the water channel. When the water level in front of the dam rises, the floating balls rise in a floating mode, twist the floating rods so as to twist the bolts, when the water level rises to a certain degree, the bolts are twisted to exceed the boundary of the baffle, and the baffle is instantaneously pressed down due to pressure of a water body in front of the dam. The experimental water channel device for simulating instantaneous and complete break of the dam avoids errors caused by human factors to experiment engineering, and improves accuracy and repeatability of an instantaneously complete dam break experiment.

The invention discloses a dam breaking opening pile jetting machine and a pile jetting method thereof, and belongs to the technical field of dam breaking opening pile planting. The dam breaking opening pile jetting machine has the technical scheme that the dam breaking opening pile jetting machine comprises two driving wheels, a driving bridge case, a pile hopper, an operation platform and a cantilever, wherein the two driving wheels are in opposite arrangement; the driving bridge case is arranged between the two driving wheels; the pile hopper and the operation platform are arranged on the driving bridge case; the cantilever is arranged on the operation platform. The dam breaking opening pile jetting machine is characterized in that one end of the cantilever is arranged on a turntable seat controlled by a host of the operation platform; the other end of the cantilever is hinged to a power arm; the end part of the power arm is provided with an emitting mechanism. The dam breaking opening pile jetting machine has the beneficial effects that when the pile jetting machine provided by the invention is used, the fast and effective piling can be realized; a plurality of piles can be conveniently and fast installed at one step; after the installation of the first pile is completed, the position of a main body of the pile jetting machine does not need to be moved; the second pile and the third pile are fast installed. The operation of the pile jetting machine is simple; the use is convenient; the efficiency is high; precious time is won for flood fighting and emergency rescues.

The invention belongs to the technical field of geotechnical engineering and engineering geology, and provides a testing device and a testing method for simulating a landslide-barrier dam-dam break flood disaster chain evolution process. The testing device comprises a set of landslide dynamic condition simulation system, a set of hydrodynamic condition simulation system and a set of non-contact measurement system, wherein the landslide dynamic condition simulation system can simulate various landslide body materials, landslide speed, and width, length and inclination angle of a landslide path;the hydrodynamic condition simulation system can simulate a plurality of hydrodynamic conditions such as water flow, water flow velocity, riverway inclination angle and riverbed properties; and the non-contact measurement system equipped on the testing device can realize from single contact point measurement to the whole domain non-contact measurement, and the measurement method is high in precision, convenient and fast. The testing device is simple in structure and convenient to use, and a reliable indoor test simulation device and a reliable indoor test simulation method are provided for research of a landslide-barrier dam-dam break flood disaster chain.

The invention relates to an earth and rockfill dam for simulating an overtopping dam break test. The earth and rockfill dam mainly comprises a dam body built by rock materials on a dam base, wherein leading slots are dug on the top of the dam body along the upstream and downstream directions of the dam body; the leading slots are communicated with the upstream and downstream of the dam body; a gate is arranged in the middle of the leading slots at an interval; and the leading slots are separated into an upstream section and a downstream section through the gate. The gate is arranged in the leading slots on the top of the dam body, and when the upstream water level reaches the position and the test is started, the gate on the leading slots is opened, the upstream water is drained from the leading slots, and the dam body is effectively washed to form dam break. According to the earth and rockfill dam, when water is accumulated at the upstream, dam break caused by the situation that the water overtops the leading slots is avoided, the test start time can be simply and effectively controlled, and the life and property safety of testers and the masses at the downstream is guaranteed.

The invention discloses an experimental device and experimental method for simulating landslide barrier dam formation and dam break. The experimental device comprises a soil material sliding module, a water flow supply module, a water tank module and a tailing collection module; the water flow supply module is communicated with the tailing collection module through a water tank of the water tank module; the water flow supply module is higher than the tailing collection module; the water tank module is arranged on one side of the water tank; the soil sliding module is arranged on one side of the water tank and can push soil into the water tank; the water flow supply module can provide stable water flow; the tailing collection module can collect soil particles and water after an experiment; and the water tank module and the tailing collection module are each provided with a high-definition camera. The inclination angles of a landslide groove and an experiment water tank can be adjusted, and the outburst of a dam body under various experiment conditions can be simulated; the tailing collection device can screen discharged soil according to different particle sizes, so that grain gradation analysis of dam-breaking soil is facilitated, data support is provided for research on dam-breaking problems of the dam body, indoor simulation experiments can be conveniently carried out, and disassembly and assembly are convenient.

The invention belongs to the field of hydraulics experimental models and particularly relates to an automatic gantry type gate used for simulating the instantaneous dam break. The automatic gantry type gate comprises a gantry type support, a gate plate located below the gantry type support and a gate plate lifting control device. The gate plate lifting control device comprises a first weight block matched with a vertical guide rail fixedly connected to the gantry type support, and a lifting motor controlling the first weight block to ascend and descend. The gate plate is connected with the first weight block after being connected to a pulley block arranged on the gantry type support in a winding manner through a steel cable set. The gantry type support is fixedly provided with a fixing plate provided with a guide groove. The guide groove slides vertically in cooperation with a vertical guide bar arranged on the gate plate. Sealing buffering bars are arranged on the edges of the two sides of the gate plate and at the bottom end of the gate plate correspondingly. The first weight block is controlled to ascend and descend through a lifting motor controller, and therefore the gate plate is controlled to ascend and descend. The automatic gantry type gate can be automatically started and reset and is suitable for various sizes of water tanks, time and labor are saved, and errors can be effectively reduced.

The invention discloses a dam-breaking circulating water tank, which comprises an experimental water tank, a dam-breaking gate, a water storage tank, a drainage gate, a water pump tank, a circulating water pump, a water inlet pipe, an upstream water injection pipe, a downstream water injection pipe, a drain pipe and an aqueduct; The gate is set in the experimental water tank, perpendicular to the water flow direction in the experimental water tank; the water storage tank is located directly below the experimental water tank and connected to the water outlet of the experimental water tank; the drainage gate is located in the experimental water tank, adjacent to the water outlet of the experimental water tank; the water pump tank is located in the water storage tank The side of the water tank is also connected to the water outlet of the water storage tank, and its absolute elevation is smaller than that of the water storage tank; the water inlet pipe, the upstream water injection pipe, the downstream water injection pipe and the water guide pipe are connected through a four-way connection, and the circulating water pump is connected to the water guide pipe. The device of the invention can efficiently and conveniently complete repeated dam break experiments, and can also be used for wave-making experiments and uniform water circulation experiments, and the slope adjustment function can cooperate with various hydrodynamic experiments, which greatly improves the scope of application.

The invention discloses a flood calculation method based on pipe-free silt protection dam burst prevention. Firstly, whether similar results exist or not is judged; if there are similar results, dIRECT OBTAINING OF PMP, if not, if so, discriminating feature elements or element combinations calculated by the PMF; a rainstorm mode is drafted through rainstorm physical cause analysis; the rainstorm mode is divided into a local mode and a displacement mode. The rainstorm mode is maximized; selecting a water vapor factor and a power factor; rainstorm data of the same type as the selected rainstormmode is used for analysis and selection; obtaining a PMP rainstorm total amount and a space-time distribution result of the dam system; finally, PMF calculation of dam system construction is considered; a PMF of an engineering design section is obtained through runoff generation calculation and confluence calculation of a PMP, a silt dam flood calculation system based on the burst prevention design concept is established, possible maximum flood is used for runoff design and engineering stability calculation of silt dam engineering, and the dam break problem caused by over-standard flood can befundamentally solved.

The invention relates to safety monitoring technology, which is capable of visualizing a geographic information of a tailings pond through a national map, designing an emergency rescue plan, and demonstrating a dam break effect. The present invention is based on an ArcGIS tailings library visualization and safety management system and method. The system includes a batch data import module, an information dynamic query module, a peripheral information model building module based on ArcGIS tailings library, a visualization display module based on ArcGIS tailings library surrounding information,a module for switching tail mine library specific location details, a module based on ArcGIS emergency rescue and escape, a module for dynamically displaying the dam break effect based on ArcGIS; a batch data import module. the visualization display module based on ArcGIS tailings library surrounding information is used to: download the base map of the ArcGIS base map, and publish the map servicethrough ArcMap. The invention is mainly applied to mine safety monitoring occasions.

The invention discloses a numerical simulation method for overtopping burst flood of an earth and rockfill dam containing a reservoir area. The reservoir area and the downstream submerged area are subdivided through triangular non-structural grids, and the area where the dam body is located does not participate in subdivision. The outlet flow of the breach serves as the outlet boundary of the reservoir area and the inlet boundary of the downstream submerged area, hydrodynamic evolution calculation of the reservoir area and the downstream submerged area is conducted. The dam front unit and thedam rear unit corresponding to the outlet boundary and the inlet boundary are dynamically adjusted according to the real-time width of the breach. The method not only can provide a downstream submerging form, but also can provide a water flow movement process in the reservoir area. Therefore, the application range of the dam break model is expanded. When breach outflow is calculated, the average water level of the dam front unit directly connected with the breach instead of the average water level of the whole reservoir area is used. The accuracy of the breach outflow process can be remarkablyimproved. Therefore, an existing earth and rockfill dam burst flood calculation method is perfected. The numerical precision of earth and rockfill dam burst flood calculation is improved.

A method for simulating a dam break process caused by seepage failure of a tailing pond dam body comprises the steps that firstly, two-dimensional seepage stability analysis is conducted on a tailingdam according to dam body material mechanics parameters, upstream and downstream water levels and other information, and the position of a seepage channel is preliminarily planned; constructing a tailing dam seepage failure breach development numerical model, simulating a seepage failure breach development process and determining a critical condition of seepage channel collapse; and finally, simulating the overtopping outburst process after collapse of the permeation channel by utilizing fluid mechanics analysis software, so as to realize dynamic simulation of the permeation failure process ofthe whole tailing pond dam body. The method has the advantages of being high in pertinence, low in cost, easy to operate, good in result visualization and the like; by means of the method, the specific situation of dam break downstream disaster caused by seepage failure of the tailing pond dam body can be obtained, a basis is provided for government decision departments and related design units to scientifically and reasonably formulate tailing pond burst emergency plans and rescue and remedial measures, and therefore losses caused by tailing pond burst are reduced, and accident risks are reduced.

The invention relates to the field of dam stability evaluation, and specifically relates to a non-destructive detection method for dam stability. The non-destructive method for dam stability comprises the following steps: (1) determining the positions of N cross sections along the horizontal length direction of a dam to be detected, wherein N is a positive integer; (2) determining the average value of the apparent resistivity of each cross section of the dam; (3) determining the change relationship between the apparent resistivity and the water content of a dam body material; (4) determining the average water content of the cross section of the dam and statistical characteristic parameters thereof; and (5) determining the potential dam break site and the level of dam break risk. The method can overcome the shortcomings and limitations of the traditional dam prediction and evaluation method to a certain extent, and has important application values in the fields of dam stability evaluation and monitoring and early warning.

The invention relates to tailing treatment method and system. The tailing treatment method comprises the following steps of: conveying tailing slurry into a thickener to precipitate; recovering overflowing water; drawing underflow slurry in an underflow area of the thickener by a slurry pump through a suction tube; conveying the underflow slurry in a filter press for pressure filtration; recovering pressure filtration water; and obtaining the treated tailings as a filtration cake. The tailing treatment system comprises the thickener, the slurry pump and the filter press, wherein the thickenercomprises a clear water area, a precipitation area and an underflow area, and the slurry pump is arranged outside the thickener, communicated with the underflow area of the thickener through the suction tube, and connected with the filter press through a discharge tube for feeding the filter press. The method of the invention has compact and reasonable process flows, treated tailings can be used for filing a waste mining pit or can be used for new development and utilization as a building material, and the like so as to reduce the occupation of soil resources and eliminate the potential safety hazards, such as tailing dam break, and the like commonly existing in the mining industry.

The invention discloses a structure and method for controlling dam break flood peak flow of a barrier dam, belongs to the field of disaster prevention and reduction engineering, and provides a structure and method capable of effectively controlling the dam break flood peak flow of the barrier dam. According to the structure for controlling the dam break flood peak flow of the barrier dam, steel pipe piles are arranged on the positions, on the two sides of a drainage channel, of the lower middle portion of the barrier dam respectively, the steel pipe piles on each side are closely arranged on the outer sides of side bank slope lines corresponding to side banks of the corresponding drainage channel in the state of flood peak flow in the period from dam break to 20 years, and the inner ends of the steel pipe piles at least penetrate into the positions 10m below side bank slope lines corresponding to the side banks of the corresponding drainage channel in the state of flood peak flow in the period from dam break to 20 years. According to the structure and method, erosion expansion speed of the two banks of the drainage channel can be decreased through erosion resistance of steel pipe pile protection slopes on the two sides, protective cement paste reinforcement stone cages on the two sides and outlet impact-resistant cement paste reinforcement stone cages, so that the dam break time of the barrier dam is delayed, the maximum flood peak flow of dam break is effectively reduced, and the purposes of disaster prevention and reduction are achieved.