9 results about "Normal fault" patented technology

This application provides a method, apparatus, and medium for determining the evolution process of folds propagating along marine normal faults, relating to the field of fault seismic assessment. The method includes: determining a seismic profile and its characteristic data based on raw data of a target seafloor area; determining, based on the characteristic data of the seismic profile, the basement interface, seafloor surface, multiple stratigraphic interfaces, characteristic points corresponding to the basement interface and seafloor surface, and evaluation parameters for each stratigraphic interface within the seismic profile; creating a triangular shear deformation range based on the characteristic points corresponding to the basement interface and seafloor surface; and determining the evolution process of folds propagating along normal faults based on the evaluation parameters corresponding to each stratigraphic interface within the triangular shear deformation range. This application, by acquiring high-resolution seismic reflection data, identifies anomalous deformation characteristics during fold growth, which often correspond to fault activity periods or paleoseismic events.

The application discloses a normal fault dislocation and earthquake time sequence coupling simulation test device and method in a supergravity environment, and the method comprises a rigid model box, a fault dislocation system, two normally closed electromagnetic valves, a manual hydraulic pump and a hydraulic oil pipe, wherein the fault dislocation system is arranged in the rigid model box; the two normally closed electromagnetic valves and the manual hydraulic pump are arranged outside the rigid model box; the manual hydraulic pump is connected with the two normally closed electromagnetic valves through the hydraulic oil pipe, and the two normally closed electromagnetic valves are connected with the fault dislocation system through the hydraulic oil pipe. The application realizes high-precision reproduction of the dynamic response of a rock-soil body and the structural disaster process under the time sequence coupling effect of fault dislocation and earthquake vibration by integrating a centrifuge supergravity field, a vibration table earthquake vibration simulation and a fault dislocation system, and provides an advanced test platform for studying the surface deformation law caused by fault dislocation and the coupling disaster mechanism of rock-soil engineering structures such as a roadbed, a slope and a tunnel.

This disclosure relates to the field of seismic imaging technology, and particularly to a normal fault modeling and seismic imaging method, device, and computer-readable storage medium. The method involves constructing a geological model containing a granular aggregate, setting initial conditions for the geological model based on information about the normal fault, simulating deformation of the geological model based on applied deformation conditions to obtain a dynamic model of the structural deformation of the normal fault, acquiring the volumetric strain distribution characteristics along the fault deformation zone based on the dynamic model, determining the acoustic characteristic parameters corresponding to the dynamic model based on the volumetric strain distribution characteristics, and determining the seismic profile image of the normal fault based on the acoustic characteristic parameters. This allows for the acquisition of seismic profiles of simulated normal faults, thereby enabling further research on seismic wave propagation patterns and imaging characteristics.

The application provides a tunnel test device for simulating stick-slip initiation near-fault ground motion of a normal fault, which comprises at least two groups of interval arranged explosion assemblies, a baffle, a tunnel model, a model box and a first simulated stratum, a second simulated stratum and a third simulated stratum assembled in the model box. The model box is provided with an opening, the baffle is clamped at the opening position to block the second simulated stratum; the side of the second simulated stratum far from the opening is higher than the side of the second simulated stratum close to the opening, and separates the first simulated stratum and the third simulated stratum; the tunnel model passes through the first simulated stratum, the second simulated stratum and the third simulated stratum; the explosion assembly is arranged below the tunnel model; the explosion assembly is provided with a first lead wire, an explosive and a driven block for detonating the explosive, the driven block is arranged in the second simulated stratum and connected with the explosive, and the side of the explosive far from the driven block is connected with the model box through the first lead wire.

The utility model discloses a kind of double-arch tunnel test devices simulating normal fault dislocation, belong to tunnel anti-seismic technical field, including left half box, right half box, left arch tunnel, right arch tunnel, the left half box, right half box side is provided with sliding surface, the left half box outside is provided with base, the base side is connected with loading device, the loading device is fixedly connected in base inner wall;The utility model is opened in fixed box body with the first installation hole similar to the appearance of double-arch tunnel, can carry out test to double-arch tunnel, by setting movable left half box fixed right half box sliding surface, and by longitudinal pushing to left half box, the longitudinal dislocation of double-arch tunnel in crossing normal fault can be simulated, to facilitate the simulation test for double arch or continuous supply, more widely.

The invention discloses a method for selecting a reserved section of a normal fault coal pillar, which belongs to the technical field of normal fault area coal pillar reservation, and realizes precision and scientization of section selection through a closed-loop process of classification and screening of drilling data, multi-factor quantitative matching, dynamic judgment of a dangerous section and segmentation adaptation verification. The method comprises the following specific steps: collecting normal fault geological parameters and drilling data, and screening an effective coal seam-aquifer interlayer spacing according to a drilling penetration state; calculating the absolute value of the difference value between the fault fall and the effective interlayer spacing, and judging the most dangerous section in combination with a preset safety threshold value; executing the process on the long extension fault sections, and determining each section of target section; and iteratively optimizing the parameters through mining feedback data. The method breaks through the limitation of traditional single-factor decision, improves the accuracy of section selection, effectively reduces the risk of water inrush accidents, reduces the waste of coal pillar resources on the premise of guaranteeing safety, and provides key technical support for refined mining of a normal fault area of a coal mine.

The application provides a plain area hidden active fault normal fault creep induced surface deformation prediction method, device, equipment and storage medium, relates to the hidden fault activity technical field. The method comprises the following steps: based on the three-dimensional simplified geological model of the hidden normal fault and its adjacent area; taking the fault creep rate as the displacement boundary condition, simulating the surface vertical deformation induced by the hidden normal fault normal fault creep, obtaining the surface vertical deformation characteristics and dividing the surface deformation zone from the hidden normal fault; according to the action law of fault dip angle, creep time and creep rate on the spatial distribution of surface vertical deformation, fitting and constructing the prediction model of normal fault creep induced surface vertical deformation. The application proposes a multi-parameter prediction model covering fault dip angle, creep rate and creep time, and realizes disaster prediction caused by creep activity of hidden fault in plain area.

The invention discloses an extrusion type basin normal fault identification method and device, and the method comprises the steps: building a spatial distribution pattern of a regional reverse fault based on a three-dimensional seismic data body after the inner horizon calibration of an extrusion type basin, and enabling the spatial distribution pattern to be used for determining the main trend of the regional reverse fault; the method comprises the following steps: under the background that an extrusion basin is in a compressive-torsional stress field, carrying out stress decomposition on the maximum principal compressive stress of a region to obtain a tensile stress component parallel to a main trend, and taking the tensile stress component as an optimal direction for normal fault identification; in the three-dimensional seismic data volume after horizon calibration, selecting an initial seismic section of which the orientation is parallel to a preferred direction, and executing small-interval translation scanning and / or small-angle rotation scanning on the initial seismic section to generate a series of scanning sections; and positioning the target position of the fault on a series of scanning profiles, and judging whether the hanging wall stratum moves downwards relative to the footwall stratum or not at the target position, and if so, identifying the fault as a normal fault. According to the invention, the normal fault of the extrusion basin can be accurately identified.

The application discloses a tunnel model experiment system and method for simulating fault dip-slip and strike-slip effects, can more truly restore the dynamic response of a tunnel crossing an active fault under the action of a strong earthquake and the action of an earthquake under faulting, can simulate faults with different faulting mechanisms, can simulate the properties of faults with strike-slip faulting (left rotation or right rotation) and dip-slip faulting (normal fault or reverse fault) at the same time, and solves the problem that a current traditional shaking table model box cannot simultaneously simulate different strike-slip faulting types and different dip-slip faulting.