11 results about "Borehole radar" patented technology

A soft rock roadway reinforced roof anchoring thickness collaborative design method comprises the steps that the proportion of grout filling cracks in a grouting reinforcement area is counted, a grouting dispersion uniformity index is calculated, and grouting effect evaluation is conducted; measuring the actual boundary depth of the grouting reinforcement area by adopting a method of combining drilling radar scanning and rock core sampling; mechanical parameters of the grouted rock mass are obtained, and a grouting enhancement coefficient is calculated; a stress transfer efficiency evaluation model is established, and the critical cooperative bearing surface depth is determined by analyzing the stress attenuation law at the boundary of the grouting reinforcement area; the critical anchoring layer thickness is calculated under the constraint condition that it is ensured that an anchoring system can effectively penetrate through a grouting strengthening area and go deep into a stable rock stratum; the cooperative work performance of a grouting reinforcement area and an anchoring system is quantitatively evaluated by calculating a system cooperation degree index, and a cooperative bearing efficiency evaluation system based on dynamic risk grading and control is established. According to the method, collaborative optimization of grouting and anchoring parameters can be achieved, and formation of a bolting-grouting integrated bearing structure can be ensured.

The invention discloses a tunnel face and borehole geological radar combined advanced forecasting detection method and system. The method mainly comprises the steps that a tunnel face and drilling geological radar integrated host is developed, joint collection of a tunnel face and a drilling radar is achieved, a ground penetrating radar of the tunnel face is used for transmitting electromagnetic waves, an antenna on one side of the drilling radar is used for transmitting the electromagnetic waves, and an antenna on the other side of the drilling radar and the ground penetrating radar of the tunnel face receive the electromagnetic waves. The tunnel face ground penetrating radar and drilling radar combined observation system is designed, all-directional and multi-angle ray coverage is achieved, and the observation data volume is increased; deriving calculation formulas such as tunnel ground penetrating radar forward modeling, an adjoint state method, a target function, an error inverse function and the like to realize tunnel ground penetrating radar full-waveform inversion; and quasi-three-dimensional fine detection imaging of unfavorable geologic bodies such as karst caves and broken bodies in front of the tunnel face can be realized.

1. Name of the product in this design: Intrinsically Safe Drilling Radar Detector Tube for Mining. 2. Purpose of this design: For the transmission of high-frequency radar waves and the acquisition and storage of transmitted signals. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

This invention discloses a method and system for joint advanced prediction and detection of tunnel face and borehole ground-penetrating radar. It mainly includes: developing an integrated host for tunnel face and borehole ground-penetrating radar, achieving joint data acquisition from both; utilizing the tunnel face ground-penetrating radar to emit electromagnetic waves, with one antenna of the borehole radar emitting electromagnetic waves, and the other antenna of the borehole radar and the tunnel face ground-penetrating radar receiving the electromagnetic waves. This application designs a joint observation system for tunnel face ground-penetrating radar and borehole radar, achieving omnidirectional, multi-angle ray coverage and increasing the amount of observation data; deriving calculation formulas for tunnel ground-penetrating radar forward modeling, the adjoint state method, the objective function, and the inverse error function, achieving full waveform inversion of tunnel ground-penetrating radar; and enabling near-three-dimensional fine detection and imaging of adverse geological bodies such as karst caves and fractured bodies in front of the tunnel face.

The invention discloses a borehole radar omni-directional detection and imaging method, and the method mainly comprises the steps: enabling an omni-directional detection data collection mode to be divided into a preset angle directional collection mode and a 360-degree rotation collection mode; wherein the preset angle directional acquisition is that directional continuous acquisition is carried out on a radiating surface of a borehole radar antenna according to set n angle directions, and data of each measuring line radar and movement speeds V1, V2... Vn of the borehole radar are acquired respectively; according to 360-degree rotation collection, the drilling radar is controlled by the driving device to conduct rotation collection at a fixed angular velocity W, and surrounding omnidirectional detection radar data and drilling radar moving speed V0 information are obtained through one-time detection. The three-dimensional imaging method mainly comprises the following steps: (1) preprocessing and enhancing acquired radar data, removing background noise, suppressing random noise, and improving the signal-to-noise ratio of signals; (2) correction is carried out according to the recorded coordinates, and channel spacing normalization processing is mainly carried out on data of each measuring line for data directionally collected at a preset angle; the data acquired by 360-degree rotation is mainly obtained by calculating azimuth information of each channel of data of corresponding radar data according to W and V0; and (3) under a unified coordinate system, performing interpolation and imaging processing on radar interpretation result data, and displaying abnormal body information by taking the drill hole as a center.

The invention discloses a variable-frequency drilling radar antenna and a method. The variable-frequency drilling radar antenna comprises a three-stage sleeve type telescopic radiator, a control system, a traction device, a displacement sensor, a limiting device, an impedance switcher, a pulse source circuit board and an acquisition circuit board. According to the invention, through a three-stage sleeve type telescopic structure, continuous variation of the physical length of the antenna is realized in a standard drill hole with the diameter of 76mm, so that a frequency adjustment range of 100-400MHz is obtained; the mechanical structure realizes large-range step switching of frequency, and the circuit switching performs frequency fine tuning and impedance optimization on each step point, so that the overall impedance matching efficiency is improved to more than 85%, and the radiation efficiency under each frequency point is ensured; a single antenna can replace a plurality of traditional fixed-frequency antennas, so that the equipment cost and the line changing time of single-hole operation are greatly reduced; according to the impedance self-adaptive matching link based on the dielectric electric constant, matching parameters can be dynamically optimized according to actual slurry in the drill hole or the stratum environment, and the signal quality under different depths and different stratum conditions is improved.

The invention discloses a geologic body three-dimensional reconstruction method and device based on multi-source data fusion, and the method comprises the steps: obtaining drilling radar original data and azimuth gamma original data of a target region, and correcting the drilling radar original data and the azimuth gamma original data, the corrected drilling radar data and the corrected azimuth gamma data are obtained; generating a radar reflection profile map based on the corrected drilling radar data; generating a gamma azimuth imaging graph based on the corrected azimuth gamma data; inputting the radar reflection profile map and the gamma azimuth imaging map into a target analysis model to obtain a geologic body radial distance map; and performing geologic body three-dimensional reconstruction of the target area through the geologic body radial distance map to obtain a geologic body three-dimensional reconstruction model. According to the invention, accurate positioning of the geologic body around the drill hole is realized, and the accuracy of the three-dimensional reconstruction model is improved.

This invention relates to the field of ground-penetrating radar detection and civil engineering structure inspection technology, and discloses an anchor cable positioning method based on single-hole radar waveform characteristics and dual-hole geometric constraints, including the following steps: Step 1: Construct at least two parallel boreholes, acquire borehole wall images through borehole optical imaging, and identify geological information based on the images; Step 2: Perform single-hole reflection scanning and cross-hole multi-offset scanning using a single-polarization borehole radar to acquire single-hole reflection data and cross-hole scanning data; Step 3: Based on the cross-hole scanning data, invert and construct an inter-hole electromagnetic wave velocity field model; Step 4: Use geological information as constraints to correct the inter-hole electromagnetic wave velocity field model; Step 5: Based on the inter-hole electromagnetic wave velocity field model, perform offset processing on the single-hole reflection data of each borehole to obtain a radar profile; thereby achieving precise positioning of oblique anchor cables through algorithmic innovation.

1. Name of the product in this design: Handheld Terminal (Intrinsically Safe for Mining). 2. Purpose of this design: For configuring borehole radar parameters, acquiring measurement data, displaying and storing measurement data, and transmitting data in real time. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The present disclosure describes a borehole radar system (100) for a drill string (200). The system (100) includes a radar transmitter (102) placed within or adjacent to a housing of a bottom hole assembly (202) of the drill string (200). The radar transmitter (102) includes a transmit antenna (104) for coupling electromagnetic waves to the drill string (200) to propagate in a forward direction along an axis of the drill string (200) in one or more predefined modes including TEM, TE 11 and / or higher order modes. A radar receiver (106) is placed within or adjacent to the housing of the bottom hole assembly (202). The radar receiver (106) includes a receiver antenna (108) adapted to receive electromagnetic waves reflected or scattered from the surrounding medium (302).

1. Name of the product in this design: Intrinsically Safe Drilling Radar Detector Tube for Mining (ZTR-6.4T(A)). 2. Purpose of this design: For the transmission of high-frequency radar waves and the acquisition and storage of transmitted signals. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.