13 results about "Engineering disasters" patented technology

The invention relates to the technical field of underground engineering safety monitoring and disaster simulation, in particular to a digital twinborn deduction platform for underground engineering disaster chain evolution simulation, which comprises a multi-disaster coupling numerical simulation module used for acquiring multi-source data including design drawing data, geological data and engineering monitoring data, and based on the multi-source data, establishing an initial stress field model by using a numerical calculation method combining a finite element and a finite difference, and carrying out leakage-settlement-structure failure multi-disaster coupling numerical simulation. According to the method, the partial differential equation for describing the evolution law of the underground engineering is used as a constraint term to be embedded into the deduction model, and online identification and dynamic extrapolation of parameters are executed by fusing real-time monitoring data, so that the accuracy of disaster evolution simulation under complex working conditions is remarkably improved; and the problem that the traditional numerical calculation method is difficult to meet the real-time requirement of digital twinning is solved.

The invention discloses a method for evaluating damage evolution of an underground structure under the action of a sudden explosion load, and relates to the technical field of civil engineering and engineering disaster prevention, and the method is characterized by comprising the following steps: S1, simulating the underground structure based on an explosion load, a geometric boundary and material parameters, and constructing a unified constitutive model; and S2, introducing a pressure-related strength criterion of a Dwark-Prasugrel criterion into the unified constitutive model so as to describe the influence of confining pressure on the shear strength. The technical problem to be solved by the invention is to provide the method for evaluating the damage evolution of the underground structure under the action of the burst explosion load, so that the key pain points such as pressure correlation, high strain rate effect, material random discreteness, damage softening energy consistency and the like are difficult to consider at the same time in the existing analysis method. A set of damage evolution evaluation method and implementation system which can be implemented from the material level to the structure level is established, and quantitative prediction and engineering grading judgment of the whole process of crack initiation, expansion to instability failure of the underground structure are supported.

This invention discloses a method for calculating the reservoir capacity and iteratively optimizing the dam height of debris flow dams based on point cloud and TIN models, belonging to the field of debris flow disaster prevention and control engineering technology. First, original ground point cloud data of the dam site area is acquired and preprocessed. TIN models of the original gully and the post-dam siltation surface are constructed separately. The design reservoir capacity is calculated using the triangular prism volume integral method, and the siltation line can be automatically generated and the siltation visualization results are output. Simultaneously, with accurate reservoir capacity as the core indicator, a verification mechanism between the reservoir capacity and the required reservoir capacity is established. The dam height is iteratively optimized by adjusting the elevation of the dam crest centerline until the reservoir capacity meets the requirements. This invention achieves rapid and high-precision calculation of the design reservoir capacity, eliminating reliance on manual operation. It also constructs a standardized reservoir capacity-dam height iterative process, achieving precise matching between dam height and reservoir capacity, balancing engineering disaster control effectiveness and economy. The results are compatible with general engineering formats and applicable to complex gully terrain, providing reliable technical support for the precise design of dams.

The invention relates to the technical field of underground engineering data processing, discloses a deep underground engineering disaster distinguishing method and system based on geological energy, and aims to solve the problem that an existing method cannot effectively reveal a multi-disaster coupling disaster-inducing mechanism and cannot accurately distinguish disasters, and the scheme mainly comprises the steps of obtaining multi-source data of underground engineering; calculating an energy field component and an energy density; dividing the engineering area into a shallow engineering area or a deep engineering area according to the energy density; for a shallow engineering area, calculating surrounding rock deformation based on a surrounding rock mechanical model, and comparing the surrounding rock deformation with a deformation threshold value to judge a collapse risk; for a deep engineering area, a damage index is analyzed and calculated through uniaxial test energy so as to judge the risk of rock burst or large deformation; the heat damage risk is analyzed and judged through chamber heat income and expenditure balance; judging the sudden water gushing risk through a preset energy rule; and multi-field coupling correction discrimination is carried out on the composite disaster. The method improves the accuracy of disaster discrimination, and is suitable for deep underground engineering.

The invention provides a vertical thin-layer weakly cemented expansive rock tunnel side wall stress model and an anchor rod design method, and relates to the technical field of underground engineering, and the method comprises the steps: obtaining tunnel basic parameters; based on the fact that layered distribution characteristics of the vertical thin-layer rock mass are equivalent to a laminated wall structure, the tunnel basic parameters are constructed through a preset multi-dimensional failure damage model, and a laminated wall stress model is obtained; performing maximum bulging deformation estimation on the laminated wall structure based on the laminated wall stress model and a rod piece buckling theory to obtain a side wall bulging deformation result; according to the side wall bulging deformation result, the stress distribution of the laminated wall structure and a preset multi-target control system, anchor rod constraint design is carried out, and an initial anchor rod design scheme is obtained; and based on the side wall bulging deformation result, the maximum bulging deformation of the initial anchor rod design scheme is calculated, stability verification is carried out, and an anchor rod optimization design scheme is obtained. According to the method, the problem of overall instability engineering disasters is solved.

The invention belongs to the technical field of coal mining simulation tests, and particularly relates to a fault zone tunneling and grouting integrated rock burst simulation test system and method. The test system comprises a triaxial confining pressure loading unit, a modular boundary constraint unit, a data monitoring feedback unit, a roadway tunneling unit and a fault grouting unit. The modularized boundary constraint unit comprises a test cavity which is defined by a first loading plate, a second loading plate, a third loading plate, a fourth loading plate, a first barrier plate and a second barrier plate and is used for accommodating a sample; each of the first loading plate and the second loading plate comprises two segmented plates, and the two segmented plates are connected through an inclined plane; the defect that a traditional test process is split is overcome, integrated continuous simulation from stress loading, fault slippage, tunneling disturbance to grouting reinforcement is achieved, and reliable experimental equipment and theoretical support are provided for deep underground engineering disaster prevention and control.

The invention relates to the technical field of underground engineering disaster prevention and control, and provides a method and a system for predicting and early warning gas-liquid seepage accidents in a collapse pressure-buried limited space. According to the method, on the basis of gas-liquid two-phase seepage characteristics in a vibration scene, the pressure condition of the next moment is predicted and determined through the pressure change rate of a leakage point within a specific time step length, and then the dynamic change of the leakage aperture and the leakage flow is predicted according to a pressure gradient module value. Besides, a collapse pressure burying field gas-liquid seepage experiment platform with a variable scale and an adjustable structure is built, a prediction and early warning model is built, risk early warning is achieved through prediction of leakage pressure and medium concentration, and the instability risk is judged through stress assessment of a confined space rock-soil layer. Therefore, prediction and early warning of the accident development trend of the limited space under the gas-liquid double-phase action in the vibration scene are realized.

The invention provides a disaster physical simulation test multi-dimensional scheme integrated definition method and system, and relates to the technical field of deep engineering disaster physical simulation and test scheme definition. Based on a technical architecture of process driving, sequence forcing, data linkage and space-time unification, a set of standardized definition process covering geological conditions, environment application, engineering activities and monitoring arrangement is constructed. By establishing a strict logic dependence and data transmission mechanism, it is ensured that subsequent steps must be executed on the basis of data generated by previous steps, randomness and discreteness in the scheme defining process are fundamentally eradicated, it is ensured that the systematicness, consistency and feasibility of a test scheme are integrally improved, and the test efficiency is improved. And a reliable basis is provided for physical simulation tests of deep engineering disasters.

This invention relates to the field of underground engineering data processing technology, and discloses a method and system for identifying hazards in deep underground engineering based on geological energy. It aims to solve the problem that existing methods cannot effectively reveal the multi-hazard coupling mechanism and accurately identify hazards. The solution mainly includes: acquiring multi-source data of the underground engineering; calculating energy field components and energy density; dividing the engineering area into shallow or deep engineering zones based on energy density; for shallow engineering zones, calculating surrounding rock deformation based on a surrounding rock mechanics model and comparing it with a deformation threshold to determine the collapse risk; for deep engineering zones, calculating the failure index through uniaxial test energy analysis to determine the risk of rockburst or large deformation; determining the risk of thermal damage through chamber heat balance analysis; determining the risk of sudden water inrush through a preset energy rule; and performing multi-field coupling correction for composite hazards. This invention improves the accuracy of hazard identification and is applicable to deep underground engineering.

The application belongs to the technical field of tunnel and underground engineering disaster prevention and reduction, and specifically discloses a grading treatment method for mudflow gushing and deposit of a tunnel passing through a poor alteration zone, which comprises the following steps: collecting information and parameters of the gushing disaster site; based on the information and parameters and a preset grading standard, performing danger grading on the deposit after the mudflow gushing; according to the danger grading result, using a construction measure corresponding to the danger grade to treat the deposit; wherein for the deposit of a low danger grade, direct dredging or sandbag counterpressure treatment is used, and for the deposit of a medium or high danger grade, a critical length for cleaning the deposit is calculated, and then at least one of segmented grouting, segmented excavation, full-face grouting or a prefabricated grouting wall is used for treatment based on the critical length. The application can safely and efficiently treat the mudflow gushing deposit in the tunnel passing through the poor alteration zone.

This invention discloses a method for wireless monitoring of the strata ahead of the drilling and blasting tunnel and inversion of stress release coefficients, belonging to the field of tunnel and underground engineering disaster monitoring technology. The method includes the following steps: S1, deploying an improved system; S2, collecting basic parameters; S3, constructing a numerical model; S4, establishing a simulation database; S5, inverting actual coefficients. This invention uses the aforementioned method for wireless monitoring of the strata ahead of the drilling and blasting tunnel and inversion of stress release coefficients to achieve real-time monitoring of longitudinal settlement of the unexcavated strata ahead of the tunnel face under blasting conditions; improves the accuracy of stress release coefficients; and the improved hinge is more flexible, thus adapting to the construction environment, ensuring accuracy, and being recyclable.

The application provides a combined supporting method for high-stress and extremely broken surrounding rock roadway, and belongs to the field of underground cavern excavation and supporting. The combined supporting first transfers the stress of extremely broken surrounding rock to the deep part through construction of pressure relief holes and pressure relief grooves, reduces stress concentration, then fills the pressure relief holes and pressure relief grooves, strengthens the support of extremely broken surrounding rock, arranges high-strength prestressed anchor cables and anchor rods of a plum-blossom-shaped anchoring system, strengthens the properties of surrounding rock, improves the self-bearing capacity of surrounding rock, finally carries out grouting and shotcrete sealing treatment, and further enhances the overall strength and bearing capacity of surrounding rock. The combined supporting method of "external support, medium strength and internal pressure relief" combines pressure relief, anchoring and grouting, combines external pressure relief and internal reinforcement, effectively controls the non-uniform deformation of the roof, sides and floor of the roadway, improves the stress distribution of extremely broken surrounding rock, avoids engineering disasters such as floor heave and spalling, and realizes the long-term stability and construction safety of high-stress and extremely broken surrounding rock roadway.

The present application belongs to the technical field of underground engineering rock burst physical simulation, and provides a fault slip rock burst physical simulation test and monitoring method, comprising: making a model test piece; wherein, in the model test piece, a conductive body is pre-embedded according to a preset position, tendency and strike; a loading test is performed on the made model test piece, and when the fault needs to be activated, the conductive body is electrified to activate the fault; resistivity information, stress information and thermal imaging information of the model test piece in the loading process are obtained; and according to the resistivity information, stress information and thermal imaging information, the deformation condition and fault activation degree of the model test piece are judged. The strength of the rock mass near the fault is weakened by the electric activation mode, and the test effect and test efficiency are improved. According to the resistivity information, stress information and thermal imaging information, the deformation condition and fault activation degree of the model test piece are judged, the monitoring accuracy is ensured, and a favorable guarantee is provided for the research on underground engineering disasters.