CN108952674B - Analysis and evaluation method and system for poor geologic body detection of soil-rock junction - Google Patents
Analysis and evaluation method and system for poor geologic body detection of soil-rock junction Download PDFInfo
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- CN108952674B CN108952674B CN201810662469.XA CN201810662469A CN108952674B CN 108952674 B CN108952674 B CN 108952674B CN 201810662469 A CN201810662469 A CN 201810662469A CN 108952674 B CN108952674 B CN 108952674B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V11/00—Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Abstract
The embodiment of the invention provides an analysis and evaluation method and system for poor geologic body detection of a soil-rock junction, which comprises the following steps: forming a detection result graph of the region to be detected according to the electromagnetic wave CT detection result of the region to be detected and the corresponding positions of the detection drill holes; acquiring a first bedrock boundary of a detection result map according to the electromagnetic wave absorption rate of each detection drill hole in the electromagnetic wave CT detection result of the region to be detected, and taking a region between the first bedrock boundary and a second bedrock boundary of the result map acquired through the drilling result as an alarm region; if the warning area is judged and known to be a karst undeveloped area, a broken zone or other bad geologic bodies exist in the warning area; and if the alarm area is judged to be the karst development area, judging that the karst exists in the alarm area.
Description
Technical Field
The embodiment of the invention relates to the technical field of geological drilling, in particular to an analysis and evaluation method and system for poor geologic body detection of an earth-rock joint.
Background
The buried depth of buildings such as urban rail transit lines is often near the earth-rock junction, and the development condition of the fracture zone determines that the fracture zone develops most strongly on the earth surface, so that the detection of poor geologic bodies such as the fracture zone of the earth-rock junction is important. However, unlike the detection of a broken zone under the background of high speed and high resistance, the low-resistance and low-speed characteristics or strong physical property difference of the earth-rock junction is a barrier for some detection signals, so that effective signals are difficult to reach a target.
At present, although a high-power electric spark and an electromagnetic wave perspective instrument are adopted, elastic wave penetrating signals of soil and rock combining parts can still be difficult to obtain; the electromagnetic wave CT also has a part that cannot receive an effective signal due to strong absorption of the electromagnetic wave by the covering layer, the upper part of the bedrock and some rock bodies (such as heavy mud). These incomplete data are important factors that influence the CT imaging performance. In the post-data processing and evaluation, the method is either compared with a covering layer or neglected, so that great hidden danger is brought to safe construction.
Disclosure of Invention
Embodiments of the present invention provide an analysis and evaluation method and system for detecting a poor geologic body at a soil-rock junction, which overcome or at least partially solve the above problems.
On the one hand, the embodiment of the invention provides an analysis and evaluation method for detection of poor geologic bodies of soil-rock junctions, which comprises the following steps:
acquiring a detection result image of the region to be detected according to the electromagnetic wave CT detection result of the region to be detected and the corresponding positions of the detection drill holes;
acquiring a first bedrock boundary of the detection result map according to the electromagnetic wave absorption rate of each detection drill hole in the electromagnetic wave CT detection result of the region to be detected, and taking a region between the first bedrock boundary and a second bedrock boundary of the detection result map acquired through a drilling result as an alarm region;
if the warning area is judged and known to be a karst undeveloped area, a broken zone exists in the warning area; and if the alarm area is judged to be the karst development area, judging that the karst exists in the alarm area.
Further, after judging that the broken zone exists in the warning area, the method further comprises the following steps:
if the alarm area is judged and known to have an area with the electromagnetic wave absorption rate larger than the first preset value, the area with the electromagnetic wave absorption rate larger than the first preset value is a broken zone.
Further, after determining that the karst exists in the warning area, the method further includes:
and if the alarm area is judged and known to have an area with the electromagnetic wave absorption rate greater than a second preset value, the area with the electromagnetic wave absorption rate greater than the second preset value is karst.
Further, the acquiring a detection result map of the region to be detected according to the electromagnetic wave CT detection result of the region to be detected and the positions of the detection boreholes specifically includes:
acquiring a plurality of section views corresponding to the detection drill holes according to the electromagnetic wave CT detection result of the region to be detected;
and sequentially splicing the plurality of section drawings according to the corresponding position relation of the detection drill holes to form a detection result drawing of the area to be detected.
Further, the obtaining of the first bedrock boundary of the detection result map according to the electromagnetic wave absorption rate of each detection borehole in the electromagnetic wave CT detection result of the region to be detected specifically includes:
acquiring the electromagnetic wave absorption rate of each detection drilling section according to the electromagnetic wave CT detection result of the region to be detected;
and in the detection result diagram, sequentially connecting points of the sections of the detection drill holes, the electromagnetic wave absorption rate of which is greater than a third preset value, to obtain the first bedrock boundary line, wherein the third preset value is smaller than the first preset value and the second preset value.
Further, the second bedrock boundary is specifically obtained by:
acquiring the thickness value of a covering layer corresponding to each detection drill hole in the region to be detected according to the drilling result of the region to be detected;
and in the detection result diagram, sequentially connecting points in the detection drill holes at corresponding thickness values to obtain the second bedrock boundary.
Further, the method further comprises:
and acquiring the top plate change characteristics of the warning area, wherein the top plate change characteristics at least comprise the maximum value, the minimum value and the average value of the top plate change.
On the other hand, the embodiment of the invention provides an analysis and evaluation system for detecting poor geologic bodies of soil-rock junctions, which comprises the following components:
the detection result image acquisition module is used for acquiring a detection result image of the region to be detected according to the electromagnetic wave CT detection result of the region to be detected and the corresponding positions of the detection drill holes;
the warning region acquisition module is used for acquiring a first bedrock boundary of the detection result map according to the electromagnetic wave absorption rate of each detection drill hole in the electromagnetic wave CT detection result of the region to be detected, and taking a region between the first bedrock boundary and a second bedrock boundary of the detection result map acquired through the drilling result as a warning region;
the analysis and evaluation module is used for judging whether the warning area is a karst undeveloped area or not, and judging whether a broken zone exists in the warning area or not; and if the alarm area is judged to be the karst development area, judging that the karst exists in the alarm area.
In a third aspect, an embodiment of the present invention provides an analysis and evaluation device for detecting a poor geologic body at an earth-rock junction, including:
at least one processor, at least one memory, a communication interface, and a bus; wherein the content of the first and second substances,
the processor, the memory and the communication interface complete mutual communication through the bus;
the communication interface is used for information transmission between the test equipment and the communication equipment of the display device;
the memory stores program instructions executable by the processor, which when called by the processor are capable of performing the above-described methods.
A fourth aspect of the present invention provides a non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the above method.
The embodiment of the invention provides an analysis and evaluation method and system for poor geologic body detection of a soil-rock junction, which comprises the following steps: acquiring a detection result image of the region to be detected according to the electromagnetic wave CT detection result of the region to be detected and the corresponding positions of the detection drill holes; acquiring a first bedrock boundary of the detection result map according to the electromagnetic wave absorption rate of each detection drill hole in the electromagnetic wave CT detection result of the region to be detected, and taking a region between the first bedrock boundary and a second bedrock boundary of the detection result map acquired through a drilling result as an alarm region; if the warning area is judged and known to be a karst undeveloped area, a broken zone exists in the warning area; and if the alarm area is judged to be the karst development area, judging that the karst exists in the alarm area. Acquiring a first bedrock boundary and a second bedrock boundary in a detection result map of a region to be detected through an electromagnetic wave CT detection result and a geological drilling result, taking a region between the first bedrock boundary and the second bedrock boundary as an alarm region, and determining that a fracture zone exists in the alarm region when the alarm region is a karst undeveloped region; and determining that the karst exists in the warning area, wherein the warning area is a karst development area.
Drawings
Fig. 1 is a flowchart of an analysis and evaluation method for detecting poor geologic bodies at soil-rock junctions according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for analyzing and evaluating the detection of poor geologic bodies at soil-rock junctions according to an embodiment of the present invention;
fig. 3 is a flowchart of another analysis and evaluation method for detecting poor geologic bodies at soil-rock junctions according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an analysis and evaluation system for detecting poor geologic bodies at soil-rock junctions according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an analysis and evaluation device for detecting poor geologic bodies at soil-rock junctions according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a flowchart of an analysis and evaluation method for detecting poor geologic bodies at soil-rock junctions according to an embodiment of the present invention, as shown in fig. 1, the method includes:
s1, acquiring a detection result map of the region to be detected according to the electromagnetic wave CT detection result of the region to be detected and the corresponding positions of the detection drill holes;
s2, acquiring a first bedrock boundary of the detection result map according to the electromagnetic wave absorptivity of each detection drill hole in the electromagnetic wave CT detection result of the region to be detected, and taking a region between the first bedrock boundary and a second bedrock boundary of the detection result map acquired through the drilling result as an alarm region;
s3, if the warning area is judged and known to be a karst undeveloped area, the warning area has a broken zone; and if the alarm area is judged to be the karst development area, judging that the karst exists in the alarm area.
In step S1, when performing electromagnetic wave CT detection on the region to be detected, a plurality of detection boreholes are first set at preset positions in the region to be detected, and the detection boreholes are divided into a transmission detection borehole and a reception detection borehole, and electromagnetic wave CT detection on the region to be detected is completed according to the steps, and the obtained detection result includes a plurality of cross-sectional views, and each cross-sectional view corresponds to a pair of transmission detection borehole and reception detection borehole. And (4) according to the position of a pair of detection drill holes corresponding to each section, splicing the plurality of section maps to obtain a map which is called a detection result map.
In step S2, since the poor geologic body at the earth-rock junction has a high absorption rate of electromagnetic waves, the warning region can be defined based on the absorption rate of electromagnetic waves in the result of the electromagnetic wave CT detection, and the first bedrock boundary is determined based on the absorption rate of electromagnetic waves in the result of the electromagnetic wave CT detection. This first bedrock boundary may be understood as a more complete bedrock boundary, as distinguished from a second bedrock boundary obtained by geological drilling, the delineation of which takes into account the poor geologic volume of the earth-rock junction.
In step S3, it may be determined by the prior art means whether the warning area is a karst non-development area, and if it is determined that the warning area is a karst development area, it indicates that there is karst in the warning area; and if the warning area is determined to be a karst undeveloped area, indicating that a broken zone exists in the warning area. It should be noted that, in practice, the geological structure is complex and variable, and the unfavorable geologic body is far from the fracture zone and the karst, and other unfavorable geologic bodies can also be determined by the above method, after the warning area is determined, the specific types of various unfavorable geologic bodies existing in the warning area are determined according to the characteristics of various unfavorable geologic bodies.
Specifically, when the method provided by the embodiment of the invention is actually executed, only the electromagnetic wave CT detection result and the geological drilling result of the region to be detected need to be obtained, and then the first bedrock boundary and the second bedrock boundary in the detection result map of the region to be detected are obtained according to the electromagnetic wave CT detection result and the geological drilling result respectively. Taking the area between the first bedrock boundary and the second bedrock boundary as an alarm area, judging whether the alarm area is a karst development area, and if the alarm area is determined to be the karst development area, indicating that karst exists in the alarm area; and if the warning area is determined to be a karst undeveloped area, indicating that a broken zone exists in the warning area. In engineering projects such as subway construction, the determination of the warning area can provide basic data of subsequent tunneling to guide construction.
The analysis and evaluation method for the detection of the poor geologic body of the soil-rock combination part provided by the embodiment of the invention comprises the following steps: acquiring a detection result image of the region to be detected according to the electromagnetic wave CT detection result of the region to be detected and the corresponding positions of the detection drill holes; acquiring a first bedrock boundary of the detection result map according to the electromagnetic wave absorption rate of each detection drill hole in the electromagnetic wave CT detection result of the region to be detected, and taking a region between the first bedrock boundary and a second bedrock boundary of the detection result map acquired through a drilling result as an alarm region; and if the warning area is judged to be the karst undeveloped area, judging that the warning area has a broken zone. Acquiring a first bedrock boundary and a second bedrock boundary in a detection result map of a region to be detected through an electromagnetic wave CT detection result and a geological drilling result, taking a region between the first bedrock boundary and the second bedrock boundary as an alarm region, and determining that a fracture zone exists in the alarm region when the alarm region is a karst undeveloped region; and determining that the karst exists in the warning area, wherein the warning area is a karst development area.
On the basis of the above embodiment, as shown in fig. 2, after determining that a broken zone exists in the warning area, the method further includes:
and S4, if judging that the warning area has an area with the electromagnetic wave absorption rate greater than a first preset value, determining that the area with the electromagnetic wave absorption rate greater than the first preset value is a fragmentation zone.
Specifically, in the embodiment shown in fig. 1, it is finally determined that only the fragmentation zone exists in the warning area, and the specific position of the fragmentation zone in the warning area is not determined, so that the area with the electromagnetic wave absorption rate greater than the first preset value in the warning area is used as the specific position of the fragmentation zone, and it can be understood that the first preset value needs to be selected according to the actual geological condition of the area to be detected.
On the basis of the foregoing embodiment, as shown in fig. 3, after determining that there is karst in the warning area, the method further includes:
and S4', if judging that the alarm area has an area with the electromagnetic wave absorption rate greater than a second preset value, determining that the area with the electromagnetic wave absorption rate greater than the second preset value is karst.
Specifically, in the embodiment shown in fig. 1, it is finally determined that only the karst exists in the warning area, but the specific location of the karst in the warning area is not determined, so that the area in the warning area where the electromagnetic wave absorption rate is greater than the second preset value is used as the specific location of the karst, and it can be understood that the second preset value needs to be selected according to the actual geological condition of the area to be detected.
In the above embodiment, the obtaining a detection result map of the region to be detected according to the electromagnetic wave CT detection result of the region to be detected and the positions of the detection boreholes specifically includes:
acquiring a plurality of section views corresponding to the detection drill holes according to the electromagnetic wave CT detection result of the region to be detected;
and sequentially splicing the plurality of section drawings according to the corresponding position relation of the detection drill holes to form a detection result drawing of the area to be detected.
Specifically, when performing electromagnetic wave CT detection, the detection boreholes are arranged in pairs, and the pairs of detection boreholes are divided into two columns, one column being the transmission detection borehole and the other column being the reception detection borehole. Each profile corresponds to a pair of test boreholes, i.e., each profile corresponds to the location of a pair of test boreholes. And sequentially splicing the plurality of section maps according to the position information of the plurality of pairs of detection drill holes to obtain an image, namely the detection result map of the region to be detected. And the subsequent analysis and detection of the bad geologic body are carried out on the basis of a detection result graph.
In the above embodiment, the obtaining a first bedrock boundary of the detection result map according to the electromagnetic wave absorption rate of each detection borehole in the electromagnetic wave CT detection result of the region to be detected specifically includes:
acquiring the electromagnetic wave absorption rate of each detection drilling section according to the electromagnetic wave CT detection result of the region to be detected;
and in the detection result diagram, sequentially connecting points of the sections of the detection drill holes, the electromagnetic wave absorption rate of which is greater than a third preset value, to obtain the first bedrock boundary line, wherein the third preset value is smaller than the first preset value and the second preset value.
Specifically, the electromagnetic wave CT detection result includes the electromagnetic wave absorption rates of the points at the corresponding positions of the detection boreholes, and in the detection result graph, the points in the detection boreholes with the electromagnetic wave absorption rates larger than a third preset value are sequentially connected to obtain the first bedrock boundary. It is understood that the first bedrock boundary is defined to include the bad geological body in the warning area as much as possible, so the third preset value needs to be smaller than the first preset value and the second preset value. And the size of the first preset value is selected according to the actual geological condition of the area to be detected.
In the above embodiment, the second bedrock boundary is specifically obtained as follows:
acquiring the thickness value of a covering layer corresponding to each detection drill hole in the region to be detected according to the drilling result of the region to be detected;
and in the detection result diagram, sequentially connecting points in the detection drill holes at corresponding thickness values to obtain the second bedrock boundary.
Specifically, bedrock boundaries can be determined in geological drilling, and in the detection result map, it is necessary to correspond to each detection borehole according to the thickness of the overburden obtained in the drilling result, to obtain a second bedrock boundary in the detection result map, which theoretically corresponds to the drilled bedrock boundary.
In the above embodiment, the method further comprises:
and acquiring the roof variation characteristics of the warning area, wherein the roof variation characteristics at least comprise the maximum value, the minimum value and the average value of the roof variation.
Specifically, through the analysis of the roof variation characteristics of the warning area, the relevant characteristics of the warning area can be obtained, and the construction is further guided.
Fig. 4 is a schematic structural diagram of an analysis and evaluation system for detecting a poor geologic body at a soil-rock junction according to an embodiment of the present invention, and as shown in fig. 4, the system includes: the system comprises a detection result image acquisition module 401, a warning area acquisition module 402 and a broken zone analysis and evaluation module 403.
Wherein:
the detection result map acquiring module 401 is configured to acquire a detection result map of the region to be detected according to the electromagnetic wave CT detection result of the region to be detected and the positions of the corresponding detection drill holes. The warning region obtaining module 402 is configured to obtain a first bedrock boundary of the detection result map according to the electromagnetic wave absorption rate of each detection borehole in the electromagnetic wave CT detection result of the region to be detected, and use a region between the first bedrock boundary and a second bedrock boundary of the detection result map obtained through a drilling result as a warning region. The broken zone analysis and evaluation module 403 is configured to determine that a broken zone exists in the warning area if the warning area is determined to be a karst undeveloped area; and if the alarm area is judged to be the karst development area, judging that the karst exists in the alarm area.
Specifically, the functions and operation flows of the modules in the analysis and evaluation system for detecting poor geologic bodies at earth-rock junctions in the embodiment of the present invention are in one-to-one correspondence with the method embodiments described above, and are not described herein again.
According to the analysis and evaluation system for the detection of the poor geologic body of the soil-rock combination part, the first bedrock boundary and the second bedrock boundary in the detection result diagram of the region to be detected are obtained through the electromagnetic wave CT detection result and the geological drilling result, the region between the first bedrock boundary and the second bedrock boundary is used as the warning region, and when the warning region is the karst undeveloped region, the fact that a broken zone exists in the warning region is determined; and determining that the karst exists in the warning area, wherein the warning area is a karst development area.
As shown in fig. 5, on the basis of the above embodiment, an analysis and evaluation device for detecting a poor geologic body at an earth-rock junction according to an embodiment of the present invention includes: at least one processor 501, at least one memory 502, a communication interface 503, and a bus 504; the processor 501, the memory 502 and the communication interface 503 complete mutual communication through the bus 504; the communication interface 503 is used for information transmission between the analysis and evaluation equipment for detecting the poor geologic body at the soil-rock junction and the communication equipment of the display device; the memory 502 stores program instructions executable by the processor 501, which the processor 501 calls to perform the method of fig. 1.
The logic instructions in the memory 502 may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Embodiments of the present invention provide a non-transitory computer-readable storage medium, which stores computer instructions, where the computer instructions cause the computer to perform the methods provided by the above method embodiments, for example, the methods include: acquiring a detection result image of the region to be detected according to the electromagnetic wave CT detection result of the region to be detected and the corresponding positions of the detection drill holes; acquiring a first bedrock boundary of the detection result map according to the electromagnetic wave absorption rate of each detection drill hole in the electromagnetic wave CT detection result of the region to be detected, and taking a region between the first bedrock boundary and a second bedrock boundary of the detection result map acquired through a drilling result as an alarm region; if the warning area is judged and known to be a karst undeveloped area, a broken zone exists in the warning area; and if the alarm area is judged to be the karst development area, judging that the karst exists in the alarm area.
Those of ordinary skill in the art will understand that: all or part of the steps of implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer-readable storage medium, and when executed, executes the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. An analysis and evaluation method for detection of poor geologic bodies at soil-rock junctions, the method comprising:
acquiring a detection result image of the region to be detected according to the electromagnetic wave CT detection result of the region to be detected and the corresponding positions of the detection drill holes;
acquiring a first bedrock boundary of the detection result map according to the electromagnetic wave absorption rate of each detection drill hole in the electromagnetic wave CT detection result of the region to be detected, and taking a region between the first bedrock boundary and a second bedrock boundary acquired through the drilling result as an alarm region;
if the warning area is judged and known to be a karst undeveloped area, a broken zone exists in the warning area; if the alarm area is judged and known to be a karst development area, the karst exists in the alarm area;
wherein, after judging that the warning region has the broken zone, still include:
if the alarm area is judged and known to have an area with the electromagnetic wave absorption rate larger than the first preset value, the area with the electromagnetic wave absorption rate larger than the first preset value is a broken zone.
2. The method of claim 1, wherein after determining that the warning region has karst, the method further comprises:
and if the alarm area is judged and known to have an area with the electromagnetic wave absorption rate greater than a second preset value, the area with the electromagnetic wave absorption rate greater than the second preset value is karst.
3. The method according to claim 1 or 2, wherein the obtaining of the detection result map of the region to be detected according to the electromagnetic wave CT detection result of the region to be detected and the position of each detection borehole specifically comprises:
acquiring a plurality of section views corresponding to the detection drill holes according to the electromagnetic wave CT detection result of the region to be detected;
and sequentially splicing the plurality of section drawings according to the corresponding position relation of the detection drill holes to form a detection result drawing of the area to be detected.
4. The method according to claim 2, wherein the obtaining a first bedrock boundary of the detection result map according to the electromagnetic wave absorption rate of each detection borehole in the electromagnetic wave CT detection result of the region to be detected specifically includes:
acquiring the electromagnetic wave absorption rate of each detection drilling section according to the electromagnetic wave CT detection result of the region to be detected;
and in the detection result graph, sequentially connecting points of the sections of the detection drill holes, of which the electromagnetic wave absorption rate is greater than a third preset value, to obtain the first bedrock boundary line, wherein the third preset value is smaller than the first preset value and the second preset value.
5. Method according to claim 1 or 2, characterized in that said second bedrock boundary is obtained in particular by:
acquiring the thickness value of a covering layer corresponding to each detection drill hole in the region to be detected according to the drilling result of the region to be detected;
and in the detection result diagram, sequentially connecting points in the detection drill holes at corresponding thickness values to obtain the second bedrock boundary.
6. The method of claim 1, further comprising:
and acquiring the roof variation characteristics of the warning area, wherein the roof variation characteristics at least comprise the maximum value, the minimum value and the average value of the roof variation.
7. An analytical evaluation system for detection of poor geologic bodies at earth-rock junctions, the system comprising:
the detection result image acquisition module is used for acquiring a detection result image of the region to be detected according to the electromagnetic wave CT detection result of the region to be detected and the corresponding positions of the detection drill holes;
the warning region acquisition module is used for acquiring a first bedrock boundary of the detection result map according to the electromagnetic wave absorption rate of each detection drill hole in the electromagnetic wave CT detection result of the region to be detected, and taking a region between the first bedrock boundary and a second bedrock boundary acquired through the drilling result as a warning region;
the analysis and evaluation module is used for judging and knowing that the warning area is a karst undeveloped area, and judging that a broken zone exists in the warning area; if the alarm area is judged and known to be a karst development area, the karst exists in the alarm area;
wherein, the analysis evaluation module is used for judging that the warning area has a broken zone:
if the alarm area is judged and known to have an area with the electromagnetic wave absorption rate larger than the first preset value, the area with the electromagnetic wave absorption rate larger than the first preset value is a broken zone.
8. An analysis and evaluation device for poor geologic body detection of an earth-rock junction, comprising:
at least one processor, at least one memory, a communication interface, and a bus; wherein the content of the first and second substances,
the processor, the memory and the communication interface complete mutual communication through the bus;
the communication interface is used for information transmission between the analysis and evaluation equipment for the poor geologic body detection of the soil-rock combination part and the communication equipment of the display device;
the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 1-6.
9. A non-transitory computer-readable storage medium storing computer instructions that cause a computer to perform the method of any one of claims 1 to 6.
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