阅读说明：本技术 一种滑坡体的三维成像方法及系统 (Three-dimensional imaging method and system for landslide mass ) 是由 苏茂鑫 刘轶民 薛翊国 邱道宏 李广坤 程凯 于 2019-11-14 设计创作，主要内容包括：本公开提供了滑坡体的三维成像方法及系统。其中该方法包括利用半航空瞬变电磁方法对滑坡体进行探测,得到滑坡体的粗略深度及粗略分布范围；在滑坡体的粗略分布范围内,将滑坡体的粗略深度划分成若干个阶梯深度,在不同阶梯深度处采用不同测线,沿着测线分别进行瞬变电磁点位和高密度电法点位布设,对应采用瞬变电磁法和高密度电阻率法获得第一电阻率值数据集和第二电阻率值数据集；从第一电阻率值数据集和第二电阻率值数据集中分别筛选出超过测线长度1/4深度地质体和不超过测线长度1/4深度地质体对应的电阻率值数据进行成像分析,并融合生成二维电阻率图像；将获得的二维图像在相应坐标系内进行三维切片成果展示,为滑坡体的治理提供准确的数据信息。(The present disclosure provides a three-dimensional imaging method and system of a landslide body. The method comprises the steps of detecting a landslide body by using a semi-aviation transient electromagnetic method to obtain the rough depth and the rough distribution range of the landslide body; dividing the rough depth of the landslide body into a plurality of step depths within the rough distribution range of the landslide body, adopting different measuring lines at different step depths, respectively carrying out transient electromagnetic point location and high-density electrical point location arrangement along the measuring lines, and correspondingly adopting a transient electromagnetic method and a high-density electrical resistivity method to obtain a first electrical resistivity value data set and a second electrical resistivity value data set; respectively screening the resistivity value data corresponding to the geologic body with the depth exceeding the survey line length 1/4 and the geologic body with the depth not exceeding the survey line length 1/4 from the first resistivity value data set and the second resistivity value data set for imaging analysis, and fusing to generate a two-dimensional resistivity image; and displaying the three-dimensional slicing result of the obtained two-dimensional image in a corresponding coordinate system, and providing accurate data information for the management of the landslide mass.)

1. A method of three-dimensional imaging of a sliding mass, comprising:

detecting a landslide body by using a semi-aviation transient electromagnetic method to obtain a resistivity value of an underground medium, and obtaining a rough depth of the landslide body and a rough distribution range of the landslide body;

dividing the rough depth of the landslide body into a plurality of step depths within the rough distribution range of the landslide body, adopting different measuring lines at different step depths, respectively carrying out transient electromagnetic point location and high-density electrical point location arrangement along the measuring lines, and correspondingly carrying out geological survey by adopting a transient electromagnetic method and a high-density electrical resistivity method so as to obtain a first electrical resistivity value data set and a second electrical resistivity value data set;

respectively screening resistivity value data corresponding to the geologic body with the depth exceeding the survey line length 1/4 and the geologic body with the depth not exceeding the survey line length 1/4 from the first resistivity value data set and the second resistivity value data set for imaging analysis and fusion to generate a two-dimensional resistivity image;

and displaying the three-dimensional slice result of the obtained two-dimensional image in a corresponding coordinate system.

2. The method of claim 1, wherein the drilling is performed at a predetermined location at an inflection point or a toe of the body, the sampled sample image is compared to an image of known resistivity values, and the data in the corresponding first and second sets of resistivity values are modified for corresponding treatment.

3. The method of claim 2, wherein the resistivity values at the borehole sample locations are acquired using an interwell resistivity CT method, and the data in the corresponding first and second resistivity value data sets are modified for corresponding processing prior to two-dimensional resistivity inversion imaging.

4. The method of claim 3, further comprising cleaning the hole site prior to using the interwell resistivity CT method to obtain resistivity values at the borehole sample.

5. The method of claim 2, wherein a borehole resistivity CT method is used to obtain resistivity values at a borehole sample site, and the data in the corresponding first and second resistivity value data sets are modified for corresponding treatment, followed by two-dimensional resistivity inversion imaging.

6. The method of claim 5 further comprising cleaning the hole sites prior to using the well-earth resistivity CT method to obtain resistivity values at the borehole samples.

7. A three-dimensional imaging system of a sliding mass, comprising:

the rough detection module of the landslide mass is used for detecting the landslide mass by using a semi-aviation transient electromagnetic method to obtain a resistivity value of an underground medium and obtain the rough depth of the landslide mass and the rough distribution range of the landslide mass;

the system comprises a resistivity value data set acquisition module, a data acquisition module and a data acquisition module, wherein the resistivity value data set acquisition module is used for dividing the rough depth of a landslide body into a plurality of step depths in the rough distribution range of the landslide body, adopting different measuring lines at different step depths, respectively carrying out transient electromagnetic point position and high-density electrical point position arrangement along the measuring lines, and correspondingly carrying out geological survey by adopting a transient electromagnetic method and a high-density resistivity method so as to obtain a first resistivity value data set and a second resistivity value data set;

the two-dimensional resistivity image generation module is used for respectively screening out resistivity value data corresponding to the geologic body with the depth exceeding the survey line length 1/4 and the geologic body with the depth not exceeding the survey line length 1/4 from the first resistivity value data set and the second resistivity value data set, carrying out imaging analysis and fusing to generate a two-dimensional resistivity image;

and the three-dimensional slice display module is used for displaying the three-dimensional slice result of the obtained two-dimensional image in a corresponding coordinate system.

8. The three-dimensional imaging system of a sliding mass of claim 7, further comprising:

and the resistivity value data correction module is used for drilling and sampling the preset position point at the corner point or the slope toe of the landslide body, comparing the sampled sample image with the known resistivity value, and correcting the data in the first resistivity value data set and the second resistivity value data set corresponding to the corresponding treatment.

9. The three-dimensional imaging system of a sliding mass according to claim 8, wherein in the resistivity value data correction module, a resistivity value at a sampling site of a borehole is acquired by using an inter-well resistivity CT method, data in the first resistivity value data set and the second resistivity value data set corresponding to respective treatments are corrected, and then two-dimensional resistivity inversion imaging is performed.

10. The three-dimensional imaging system of a sliding mass according to claim 8, wherein in the resistivity value data correction module, a well earth resistivity CT method is used to obtain resistivity values at a drill sampling site, data in the first resistivity value data set and the second resistivity value data set corresponding to the respective treatments are corrected, and then two-dimensional resistivity inversion imaging is performed.

Technical Field

The disclosure belongs to the field of landslide bodies, and particularly relates to a three-dimensional imaging method and a three-dimensional imaging system for a landslide body.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

At present, only one method is usually adopted for landslide mass survey, so that the obtained exploration data is inaccurate, the obtained three-dimensional imaging graph is also inaccurate, and the later-stage disaster control is influenced; the inventor also finds that the conventional landslide mass surveying data mostly adopts a manual data acquisition mode, so that data errors, data information loss and the like can be caused, and the accuracy of a three-dimensional imaging graph is also influenced.

Disclosure of Invention

In order to solve the problems, the present disclosure provides a three-dimensional imaging method and system for a landslide body, which can improve the accuracy of three-dimensional imaging and provide accurate data guarantee for later disaster control.

In order to achieve the purpose, the following technical scheme is adopted in the disclosure:

a first aspect of the present disclosure provides a three-dimensional imaging method of a sliding mass, including:

detecting a landslide body by using a semi-aviation transient electromagnetic method to obtain a resistivity value of an underground medium, and obtaining a rough depth of the landslide body and a rough distribution range of the landslide body;

dividing the rough depth of the landslide body into a plurality of step depths within the rough distribution range of the landslide body, adopting different measuring lines at different step depths, respectively carrying out transient electromagnetic point location and high-density electrical point location arrangement along the measuring lines, and correspondingly carrying out geological survey by adopting a transient electromagnetic method and a high-density electrical resistivity method so as to obtain a first electrical resistivity value data set and a second electrical resistivity value data set;

respectively screening resistivity value data corresponding to the geologic body with the depth exceeding the survey line length 1/4 and the geologic body with the depth not exceeding the survey line length 1/4 from the first resistivity value data set and the second resistivity value data set for imaging analysis and fusion to generate a two-dimensional resistivity image;

and displaying the three-dimensional slice result of the obtained two-dimensional image in a corresponding coordinate system.

A second aspect of the present disclosure provides a three-dimensional imaging system of a gliding mass, comprising:

the rough detection module of the landslide mass is used for detecting the landslide mass by using a semi-aviation transient electromagnetic method to obtain a resistivity value of an underground medium and obtain the rough depth of the landslide mass and the rough distribution range of the landslide mass;

the system comprises a resistivity value data set acquisition module, a data acquisition module and a data acquisition module, wherein the resistivity value data set acquisition module is used for dividing the rough depth of a landslide body into a plurality of step depths in the rough distribution range of the landslide body, adopting different measuring lines at different step depths, respectively carrying out transient electromagnetic point position and high-density electrical point position arrangement along the measuring lines, and correspondingly carrying out geological survey by adopting a transient electromagnetic method and a high-density resistivity method so as to obtain a first resistivity value data set and a second resistivity value data set;

the two-dimensional resistivity image generation module is used for respectively screening out resistivity value data corresponding to the geologic body with the depth exceeding the survey line length 1/4 and the geologic body with the depth not exceeding the survey line length 1/4 from the first resistivity value data set and the second resistivity value data set, carrying out imaging analysis and fusing to generate a two-dimensional resistivity image;

and the three-dimensional slice display module is used for displaying the three-dimensional slice result of the obtained two-dimensional image in a corresponding coordinate system.

The beneficial effects of this disclosure are:

the method utilizes a semi-aviation transient electromagnetic method to obtain the rough depth of the landslide body and the rough distribution range of the landslide body, on the basis of the rough depth of the landslide body and the rough distribution range of the landslide body, corresponding resistivity value data is obtained by utilizing a transient electromagnetic method and a high-density resistivity method, then resistivity value data corresponding to the geologic body with the depth exceeding the survey line length 1/4 and the geologic body with the depth not exceeding the survey line length 1/4 are respectively screened out for imaging analysis and fusion to generate a two-dimensional resistivity image, and finally the obtained two-dimensional image is subjected to three-dimensional slicing result display in a corresponding coordinate system, so that the three-dimensional imaging accuracy of the landslide body is improved, the situations of data error, data information loss and the like formed in manual data acquisition are reduced, the method is used for exploring the debris flow landslide, and provides accurate and reliable prior conditions for later disaster management.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.

FIG. 1 is a flow chart of a method for three-dimensional imaging of a sliding mass according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a three-dimensional imaging system of a sliding mass according to an embodiment of the present disclosure.

Detailed Description

The present disclosure is further described with reference to the following drawings and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.