The invention discloses an underground-cavern-group-construction-schedule simulating optimization method based on ventilation numerical simulation. The underground-cavern-group-construction-schedule simulating optimization method includes the following steps that (1) ventilation numerical simulation and the underground-cavern-group construction schedule are combined, and an underground-cavern-group-construction-schedule simulating optimization mathematical model based on ventilation numerical simulation is established; (2) an underground-cavern-group-construction-ventilation two-phase-flow hybrid simulation theoretical method is provided; (3) an underground-cavern-group-construction-ventilation numerical simulation parameter base is established; (4) an underground-cavern-group-construction-ventilation three-dimensional fine physical model is established, and grids are divided; (5) underground-cavern-group-construction-ventilation two-phase-flow hybrid simulation under different excavation schedules is achieved; (6) simulating optimization analysis of underground-cavern-group-construction whole process is carried out in cooperation with the ventilation numerical simulation result. According to the underground-cavern-group-construction-schedule simulating optimization method based on ventilation numerical simulation, the whole wind flow structure, pollutant space distribution and the dynamic variation rule in cavern groups are solved, and wind-flow-field transient pulsation information and the dust particle dispersion mechanism of ventilation difficulty areas can also be obtained.

Underground-cavern-group-construction-schedule simulating optimization method based on ventilation numerical simulation

The invention discloses a flood-diversion area danger-avoiding transfer scheme programming method in a passive flood-diversion scene, and belongs to the technical field of disaster danger-avoiding scheduling plans and applicable countermeasure studies thereof. The flood-diversion area danger-avoiding transfer scheme programming method comprises the steps of: generating a danger-avoiding transfer original static feasible route table; evaluating cost of personnel transfer; evaluating a danger-avoiding transfer scheme based on a time window; establishing a danger-avoiding transfer model in the passive flood-diversion scene; and solving the danger-avoiding transfer model. The flood-diversion area danger-avoiding transfer scheme programming method gives full consideration to the influence of the flood routing process on the danger-avoiding transfer process and road congestion situation in the transfer process, the provided time window concept realizes organic combination of the danger-avoiding transfer model and the influence of the flood routing process as well as the road congestion situation, and accurately describes the personnel transfer process in the passive flood-diversion scene; meanwhile, the method provides a danger-avoiding transfer cost evaluation function based on road congestion coefficient for the defects of the traditional method in the aspect of personnel transfer cost, and achieves the scientific quantization of the personnel transfer cost.

Flood-diversion area danger-avoiding transfer scheme programming method in passive flood-diversion scene

The invention discloses a fracture network connectivity and seepage computation method based on the graph theory The method includes the specific steps that firstly, the fracture track length in a two-dimensional fracture network is determined; secondly, the fracture direction in the two-dimensional fracture network is determined; thirdly, a two-dimensional fracture network graph is generated; fourthly, a first-level connected graph of the two-dimensional fracture network is generated; fifthly, a second-level connected graph of the two-dimensional fracture network is generated; sixthly, the seepage conditions of the two-dimensional fracture network are calculated By means of the method, the connectivity and seepage characteristics of a rock fracture under different fracture parameters can be simulated, so that a rock sample is collected conveniently in engineering practice to obtain parameter distribution of a rock mass at the position, the seepage conditions of the rock mass at the position can be obtained, and theoretical support is provided for implementation of the engineering practice

Fracture network connectivity and seepage computation method based on graph theory

The invention relates to a calculating method for refined assessment on storm tide disaster risks. The method is performed through the following steps: building a varied category of grid units for regions affected by storm tide disasters; using coast lines as a reference to calculate the distances from the centers of mass of the different grid units to the coast lines; utilizing a highly precise digital elevation landform to calculate the average elevation inside each grid; relying on experience and statistic equations to calculate the largest submergence set-up; based on the average elevation and the largest submergence set-up, obtaining the average depth of each grid unit; giving different degrees of vulnerability to the coast lines according to research on their types and calculating the greatest possible losses of the different grid units. The calculating method provides more space for storm disaster risk evaluation, reflects loss possibility differences from more refined space units and raises the accuracy of evaluation results.

Calculating method for refined assessment on storm tide disaster risks

A seawall safety real-time assessment method and special device are disclosed, which has at least one alarm device, a computer, a hydrological collection device or storm surge prediction model. The alarm device is used for early warning of seawall overflow or breakwater, the computer is connected with the alarm device. The computer is also connected with the hydrological collecting device or receives the storm surge forecast value. The computer can process the hydrological data collected by the hydrological collecting device or the received tidal level and wave forecast value and decide whether to overflow or break the dike according to the judgment index. The computer controls the alarm device according to the decision result. The invention can carry out real-time evaluation on the seawall safety under the action of the storm surge, realize the prediction and alarm of the seawall safety, and has high alarm accuracy, thereby providing a basis for starting the emergency management workin advance and reducing the loss of the marine disaster.

Seawall safety real-time assessment method and special device

The invention discloses a method for improving storm surge disaster risk predication accuracy. The method comprises the following steps that a storm surge disaster scene is built based on a scene analysis method; a storm surge disaster three-dimensional numerical simulation method is provided; a multi-mode multiobjective flood refuge optimal path selection model is built; the provided storm surge disaster three-dimensional numerical simulation method specifically comprises the steps that (1) the three-dimensional network model of the regional terrain is built; (2) the SST k-omega flood routing three-dimensional turbulent model of a coupling VOF method is built; (3) a three-dimensional risk drawing is drawn based on the three-dimensional numerical simulation result. The factuality and the visualization effect of flood dynamic real-time flowing and disaster time distribution are increased; a multi-mode multiobjective emergency path decentralization model is used for further improving the completeness and reasonability of an emergency refuge system, a disaster contingency plan is effectively made, and a multi-module coupling, high-completeness and high-practicality storm surge disaster risk analysis system is provided.

Method for improving storm surge disaster risk predication accuracy

The invention discloses a method for predicting the seepage field of a nodal region of an earth and rockfill dam and determining the infiltration side of the earth and rockfill dam. The method includes establishing a nodal-region three-dimensional geological detailed model of an unfavorable geologic body and fractures; setting up three-dimensional seepage and computing a grid model on the basis of the three-dimensional geological detailed model; simulating numerical values of the seepage field of the earth and rockfill dam on the basis of the three-dimensional geological detailed model, dispersing by the finite volume method according to the determined continuity equation, the water and steam two-phase N-S equation, the water and steam two-phase mixing speed equation and mixing density equation, the set boundary conditions and the seepage parameters of the actual project, solving with the SIMPLE algorithm, realizing numerical simulation of the seepage field of the earth and rockfill dam on the basis of the three-dimensional geological detailed model and thereby predicting the seepage field of the nodal region of the earth and rockfill dam. Geological information can be accurately reflected, and the seepage field of the nodal region of the earth and rockfill dam can be accurately simulated. Meanwhile, the seepage field is utilized to determine the infiltration side of the earth and rockfill dam by the VOF (volume of fluid) method.

Method for predicting seepage field of nodal region of earth and rockfill dam and determining infiltration side of earth and rockfill dam

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Method for improving storm surge disaster risk predication accuracy

Method for predicting seepage field of nodal region of earth and rockfill dam and determining infiltration side of earth and rockfill dam