KR101654584B1 - Apparatus and method for monitoring rockslide - Google Patents

Apparatus and method for monitoring rockslide Download PDF

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KR101654584B1
KR101654584B1 KR1020150121523A KR20150121523A KR101654584B1 KR 101654584 B1 KR101654584 B1 KR 101654584B1 KR 1020150121523 A KR1020150121523 A KR 1020150121523A KR 20150121523 A KR20150121523 A KR 20150121523A KR 101654584 B1 KR101654584 B1 KR 101654584B1
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stress
detection sensor
rock block
stress detection
rock
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KR1020150121523A
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Korean (ko)
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최정해
채병곤
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한국지질자원연구원
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V9/00—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)

Abstract

The present invention relates to a rockfall occurrence monitoring apparatus.
The present invention relates to a stress detection sensor provided on a rock block located on an inclined surface, the stress detection sensor comprising at least one stress detection sensor for measuring a micro displacement of the stress detection sensor by the weight of the rock block, And a fall rock monitoring unit for calculating a shearing stress applied to the rock block by using the micro displacement to predict a rock falling probability of the rock block.

Description

[0001] APPARATUS AND METHOD FOR MONITORING ROCKSLIDE [0002]

The present invention relates to an apparatus and a method for monitoring the occurrence of rockfall.

Rockfall accidents occur frequently. In particular, the risk of rockfall increases significantly during the summer and winter months when precipitation is concentrated.

However, a rockfall accident comes without warning. Since rockfall occurs at the moment of displacement at rock mass, it is not easy to predict.

Therefore, the conventional technique for preparing for a fallout has not developed a technique for predicting a fallout, but has been developed in order to reduce human and physical damage caused by the fallout.

Korean Patent Application No. 10-2005-0025869, for example, has proposed " a rockfall detection system of rockfall preventing fences interconnected with wires ".

However, there is a limit to the technique of reducing the damage caused by the occurrence of rockfall such as the prior art. This is because it is only a post-mortem measure. In addition, there is no guarantee that an anti-rock fence will prevent all human damage.

In addition, a national park area, such as Bukhansan Mt. Bukhang, where a recent rockfall accident has occurred, is also a problem in that it can not be equipped with rockfall prevention fences like the conventional art.

Therefore, there is a need for a technique for monitoring the occurrence of rockfall in advance of the occurrence of rockfall in order to solve the public anxiety and to minimize human and material damage caused by rockfall.

Therefore, the inventor of the present invention has studied for a long time to solve such a problem, developed through trial and error, and finally completed the present invention.

It is an object of the present invention to provide an apparatus and method for monitoring the occurrence of rockfall by measuring micro-displacements. The present invention can anticipate the occurrence of rockfall by using a technique capable of measuring the micro displacement of a sensor deformed by the weight of the rock block in contact with the rock block.

Since the present invention does not impair aesthetic appeal, it can be easily installed on a slope of a road as well as an area such as a national park.

On the other hand, other unspecified purposes of the present invention will be further considered within the scope of the following detailed description and easily deduced from the effects thereof.

In order to achieve the above object, according to a first aspect of the present invention, there is provided a stress detection sensor installed on a rock block located on an inclined surface, the stress detection sensor comprising: at least one stress detection sensor for measuring a micro displacement of the stress detection sensor by the weight of the rock block; And a fall rock monitoring unit connected to the stress detection sensor by wire or wirelessly, and calculating a shearing stress applied to the rock block by using the micro displacement to predict a fall probability of the rock block. And is an occurrence monitoring device.

In a preferred embodiment of the present invention, the stress detection sensor comprises: a body composed of a single medium; And at least one strain gauge attached to the main body and measuring a minute displacement of the main body deformed by a force applied to the main body.

In a preferred embodiment of the present invention, the stress detection sensor is provided so that the longitudinal direction of at least one of the strain gages included in the stress detection sensor is parallel to the vertical direction of the inclined surface.

In a preferred embodiment of the present invention, the stress detection sensor is provided in close contact with a gap between the inclined surface and the rock block, and the main body is formed to match the shape of the clearance.

In a preferred embodiment of the present invention, the stress detection sensor may include three different strain gauges arranged in the x, y, and z-axis directions, respectively.

In a preferred embodiment of the present invention, the stress detection sensor comprises: a wire having one end fixed to an inclined surface and the other end fixed to a rock block; And at least one strain gauge attached to the wire and measuring a fine displacement of the wire deformed by a force applied to the wire.

In a preferred embodiment of the present invention, the stress detection sensor is preferably installed at at least one position between the inclined surface and the rock block to form a stress detection sensor network.

It is preferable to further include an alarm unit for issuing a rockfall danger warning in a preferred embodiment of the present invention.

According to a second aspect of the present invention, there is provided a method for measuring a micro displacement of a stress detection sensor in which a stress detection sensor provided in contact with a rock block located on an inclined plane and an inclined plane is deformed by the weight of the rock block step; (b) calculating a vertical stress acting on the rock block using the fine displacement; (c) calculating a shear stress acting on the rock block by using the vertical stress; And (d) monitoring a change in the shear stress of the rockfall generation monitoring device to predict the possibility of rockfall of the rock block.

In a preferred embodiment of the present invention, in the step (b), the vertical stress is calculated by multiplying the elastic modulus of the medium constituting the stress detection sensor by the micro displacement.

In a preferred embodiment of the present invention, in the step (c), a shear stress acting on the rock block is calculated using the following equation,

expression:

Figure 112015083661273-pat00001

In the above formula

Figure 112015083661273-pat00002
Shear stress,
Figure 112015083661273-pat00003
Lt; / RTI >
Figure 112015083661273-pat00004
Is the residual friction angle of the inclined surface on which the rock block is located, and C is the adhesive strength between the rock block and the inclined surface.

In a preferred embodiment of the present invention, the fallout monitoring unit estimates the possibility of rockfall of the rock block by monitoring the change of the shear stress with the maximum shear stress.

The present invention has the effect of predicting the fallout in advance. As described above, the present invention can predict the occurrence of rockfall by using a technique capable of measuring the micro-displacement of a sensor deformed by the weight of a rock block in contact with the rock block. Therefore, the effect of predicting the rockfall of the present invention is a remarkably improved effect as compared with the prior art.

Unlike the conventional art in which a large artificial structure is installed, the present invention monitors the occurrence of rockfall by installing a small sensor in a gap between rock blocks. Therefore, the present invention can be easily installed not only on a slope of a road but also on an area such as a national park because it does not hurt the beauty.

On the other hand, even if the effects are not explicitly mentioned here, the effect described in the following specification, which is expected by the technical features of the present invention, and its potential effects are treated as described in the specification of the present invention.

1 is a view showing a preferred embodiment of a rockfall occurrence monitoring system according to the present invention.
2 is a view showing a preferred embodiment of a position where a stress detection sensor according to the present invention is installed in a rock block.
3 is a view showing a preferred embodiment of a method for measuring shear stress by a stress detection sensor according to the present invention.
4 is a graph showing a comparison between a stress amount measured by the stress detection sensor and a displacement amount of a rock block according to the present invention.
5 is a view showing a first embodiment of a stress detection sensor according to the present invention.
6 is a view showing a second embodiment of a stress detection sensor according to the present invention.
7 is a view showing a third embodiment of a stress detection sensor according to the present invention.
* The accompanying drawings illustrate examples of the present invention in order to facilitate understanding of the technical idea of the present invention, and thus the scope of the present invention is not limited thereto.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may obscure the subject matter of the present invention.

1 is a view showing a preferred embodiment of a rockfall occurrence monitoring system according to the present invention.

As shown in FIG. 1, the rockfall occurrence monitoring apparatus 100 according to the present invention includes a rock fall monitoring unit 200, a stress detection sensor 300, and a rockfall monitoring server 400.

The fallout monitoring unit 200 is connected to the stress detection sensor 300 in a wired or wireless manner. One stress detection sensor 300 may be connected to the plurality of stress detection sensors 300 (1) to 300 (n). In a preferred embodiment, the plurality of stress detection sensors 300 (1) to 300 (n) may be distributed in one rock block.

The rockfall occurrence monitoring apparatus 100 may include a plurality of rockfall monitoring units 200. In a preferred embodiment, the plurality of fallout monitoring units 200 may be distributed over each of the plurality of rock blocks.

The fall-stone monitoring unit 200 is connected to the stress-detecting sensor 300 in a wired or wireless manner, and receives the micro-displacement measurement value from the stress-detecting sensor 300. The fall-stone monitoring unit 200 calculates the shearing stress applied to the rock block on which the stress detection sensor 300 is installed by using the received micro-displacements. The fall stone monitoring unit 200 compares the calculated shear stress and the maximum shear stress to monitor the possibility of falling of the rock block.

In a preferred embodiment, the fallout monitoring unit 200 may comprise a wired communication module or a wireless communication module capable of communicating with the fallout monitoring server 400.

In a preferred embodiment, the fall-stone monitoring unit 200 may further include an alarm unit for issuing a fall risk warning. The alarm unit may include means such as a warning light, a speaker, etc. for displaying a warning message. In one embodiment, the fallout monitoring unit and the alarm unit can be installed separately from each other. For example, a rockfall monitoring unit can be installed near a rock block where there is a risk of rockfall, and an alarm unit can be installed near the point where the rock block falls.

The stress detection sensor 300 includes a body composed of a single medium and at least one strain gauge. The strain gauge measures the micro displacement of the body which is attached to the body and deformed by the force applied to the body.

The stress detection sensor 300 is installed in a rock block located on an inclined plane. The stress detection sensor 300 measures the micro displacement of the stress detection sensor which is deformed by the weight of the rock block.

The rockfall occurrence monitoring apparatus 100 may include a plurality of stress detection sensors 300 (1) to 300 (n). In this case, a plurality of stress detection sensors may be provided at least at one or more positions between the inclined surface and the rock block to form a stress detection sensor network.

The rockfall monitoring server 400 may be connected to the at least one rockfall monitoring unit 200 (1) to 200 (n) in a wired or wireless manner. In the preferred embodiment, the rockfall monitoring server 400 is not a rockfall monitoring site For example, the rockfall monitoring server 400 may be installed in a national park management office to control the rockfall risks occurring in a wide range of national parks It can function as a server.

2 is a view showing a preferred embodiment of a position where a stress detection sensor according to the present invention is installed in a rock block.

In a preferred embodiment, the stress detection sensor 300 may be installed in close contact with the gap between the inclined surface 10 and the rock block 20. For example, the stress detection sensor 300 may be installed in a gap formed at the lower end of the rock block 20.

The body of the stress detection sensor 300 may be formed in a different shape to match the shape of the gap. In a preferred embodiment, the body of the stress detection sensor 300 can be deformed in angle () and length (l) to match the shape of the clearance. When the shape of the stress detection sensor 300 is shaped to fit the shape of the gap as described above, the degree to which the stress detection sensor 300 is brought into close contact with the clearance of the rock block 20 can be increased. As the degree of close contact increases, there is an effect that the fine displacement measured by the stress detecting sensor 300 can be measured more precisely.

The stress detection sensor 300 includes at least one strain gauge for measuring the micro displacement of the body. At this time, it is preferable that the stress detection sensor 300 is installed such that the longitudinal direction of at least one strain gauge included in the stress detection sensor 300 is parallel to the vertical direction of the inclined surface (see Figs. 3 and 5) As will be described later).

In another embodiment, the stress detection sensor 300 may be installed at the top of the slope 10 and the rock block 20. In this case, the stress detection sensor 300 may be in the form of a wire whose one end is fixed to the inclined surface 10 and the other end is fixed to the rock block 20. The wire includes a strain gauge attached to the wire. The strain gauge measures the fine displacement of the wire deformed by the force applied to the wire.

3 is a view showing a preferred embodiment of a method for measuring shear stress applied to a rock block using a stress detection sensor according to the present invention.

And installed to contact the stress detecting sensor 300 to break the rock block 20 located on the inclined surface 10 with a predetermined slope (θ r).

The body of the stress detection sensor 300 provided in contact with the rock block 20 is deformed by the weight of the rock block. The strain gage of the stress detection sensor 300 measures the micro displacement of the body of the stress detection sensor 300. [ The stress detection sensor 300 transmits the measured fine displacement to the rockfall occurrence monitoring unit.

The rockfall generation monitoring apparatus calculates the normal stress acting on the stress detection sensor using the micro displacement. In a preferred embodiment, the normal stress (? N ) can be calculated by multiplying the elastic modulus (E) of the medium of the body constituting the stress detection sensor by the micro displacement (?) As follows.

expression:

Figure 112015083661273-pat00005

The rockfall monitoring device calculates the shear stress acting on the rock block using the normal stress (σ n ). In a preferred embodiment, the shear stress [tau] can be reminiscent of the following equation.

expression:

Figure 112015083661273-pat00006

Where τ is the shear stress, σ n is the normal stress, θ r is the slope (residual friction angle) of the slope where the rock block is located, and C is the sticking force between the rock block and slope. That is, the shear stress? Is a force in the direction parallel to the inclined plane among the forces constituting the normal stress? N x tan θ r ) and the adhesive force.

A rockfall monitoring system monitors the change in shear stress (τ) to predict the possibility of rockfall in rock blocks. In a preferred embodiment, the rockfall generation monitoring apparatus can estimate the possibility of rockfall in a rock block by monitoring the change in shear stress (τ) with the maximum shear stress. In the rockfall monitoring system, it can be judged that the probability of rockfall is higher as the measured shear stress (τ) approaches the maximum shear stress.

4 is a graph showing a comparison between a stress amount measured by the stress detection sensor and a displacement amount of a rock block according to the present invention. Assume that a rockfall occurs when 17 hours have elapsed since the start of the measurement. However, for the sake of understanding, the amount of displacement per unit time at the moment when the rockfall occurs is exaggerated somewhat.

4, the solid line indicates the amount of displacement of the rock block, and the dotted line indicates the amount of stress measured by the stress detection sensor. The amount of displacement of rock blocks was not observed until 17 hours. On the other hand, it can be seen that the measured amount of stress is gradually increasing for 17 hours. Therefore, it can be seen that a gradual change is visually observed in the stress amount measured in comparison with the displacement amount of the rock block which is hard to observe apparently.

When the rockfall begins to occur, the amount of displacement increases sharply. On the other hand, the amount of stress decreases sharply. At this time, the stress at the point where the stress is increased and then converted to the abrupt decrease is the highest stress.

In this way, the rock block generates micro displacement until it falls down, but suddenly it leaves the slope at any moment. Therefore, it can be seen that only minute displacements are observed in the rock block before the actual rockfall occurs, and it is difficult to visually confirm such a micro displacement. Therefore, there is a problem that the technique of measuring the displacement of the rock block effectively can not predict the rockfall.

On the other hand, the present invention predicts the occurrence of rockfall by monitoring the stress in comparison with the maximum stress. The maximum stress can be derived from the experiment in advance. By monitoring the stress versus the maximum stress, you can see how much of the stress is concentrated up to several percent of the maximum stress. For example, according to the present invention, when the stress measured at about 10:00 reaches 70% of the maximum stress, a primary fall warning can be issued. When the measured stress reaches about 90% of the maximum stress at about 15:00, evacuation order can be issued. Therefore, the present invention has the effect of effectively predicting the occurrence of rockfall.

FIG. 5 is a view showing a first embodiment of a stress detection sensor according to the present invention, and FIG. 6 is a view showing a second embodiment of a stress detection socket according to the present invention.

5 and 6, the stress detection sensor 300 includes a main body 310 and a strain gauge 320. [

The main body 310 is formed of a single medium having no inner hollow, and is formed in a shape that can be in close contact with the gap of the rock block. For example, as shown in FIG. 5, the distal end portion may be formed as a straight line, but may be formed as a sharp point as shown in FIG. In the case of FIGS. 5 and 6, the surface to which the strain gauge 321 is attached is a rectangular shape, but it is not limited thereto. In other embodiments, the surface may be circular, triangular, or the like.

The strain gage 320 is attached to the main body 310 and measures a micro displacement of the main body 310 deformed by a force applied to the main body 310.

At least one strain gauge 320 is attached to the body 310. It is preferable that a plurality of strain gages 320 attached to one body 310 are arranged in different directions in the longitudinal direction. If three different strain gauges are attached to the body, it may be desirable to be arranged in the x, y and z axis directions, respectively. 5 and 6, the strain gage 321 is arranged in the z-axis direction, the strain gage 323 is arranged in the x-axis direction, and the strain gage 325 is arranged in the direction obliquely rising in the z-axis direction from the x-axis direction Lt; / RTI >

7 is a view showing a third embodiment of a stress detection sensor according to the present invention.

In Fig. 7, the stress detection sensor 300 includes a fixed unit 330, a wire 340, and a strain gage 350. Fig.

The first fixed unit 331 is fixed to the inclined surface and connected to one end of the wire. The second fixed unit 333 is fixed to the rock block and is connected to the other end of the wire.

The wire 340 has one end fixed to the slope and the other end fixed to the rock block. The wire is formed into a single medium.

The strain gauge 350 measures the fine displacement of the wire as it is attached to the wire and deformed by the force applied to the wire.

[Other Embodiments]

(1) Although the fallout monitoring unit has been described as receiving a measurement of fine displacement in a wire-wireless manner in a stress detection sensor, in another embodiment of the present invention, the function of the fallout monitoring unit and the stress detection sensor may be integrated . That is, it is possible to detect the stress in one unit, calculate the shear stress, and monitor the possibility of falling of the rock block.

(2) In another embodiment, the stress detection sensor may be wired or wirelessly connected to the fallout monitoring server without being connected to the fallout monitoring unit. In this case, the rockfall monitoring server can calculate the shear stress using the received stress and monitor the possibility of falling rock blocks.

(3) Although not shown, in one embodiment, the strain gage may include a base, a resistance wire, and a lead wire. The lower surface of the base is attached to the object and the upper surface of the base is attached with a resistance line. When the resistance wire is deformed in the tensile direction, the length increases and the cross-sectional area decreases, thereby increasing the electric resistance. Measure the electrical resistance of the resistance wire through the lead wire to measure the degree of deformation of the object.

(4) Glossary of terms: In the present invention, the shearing stress refers to a force that acts in a direction parallel to a cross section to keep the original shape when a deformation of the object is deformed. In the present invention, a strain gauge is a measuring device for measuring a strain when an object is deformed into an external force. The strain gage is attached to an object (object to be measured) to measure the displacement of the object.

The scope of protection of the present invention is not limited to the description and the expression of the embodiments explicitly described in the foregoing. It is again to be understood that the present invention is not limited by the modifications or substitutions that are obvious to those skilled in the art.

Claims (12)

It is made to match the shape of the gap formed between the inclined face and rock block as a stress detecting sensor to increase the degree of close contact with the rock block gap, to close the gap between the inclined surface having a predetermined slope (θ r) and rock block At least one stress detection sensor installed to measure a micro displacement due to the weight of the rock block using a strain gauge; And
And a rockfall monitoring unit connected to the stress detection sensor by wire or wirelessly and calculating a shearing stress applied to the rock block by using the micro displacement to predict the rock falling probability of the rock block,
Wherein the stress detection sensor comprises:
A body formed of a single medium in which the angle? And the length (1) are deformed to conform to the shape of the clearance so as to be in close contact with the clearance between the rock blocks,
A first strain gauge installed to the longitudinal direction of the body so as to be parallel to the vertical direction of the inclined surface and measuring a minute displacement of the body; And
And a second strain gauge attached to the body in a direction orthogonal to the longitudinal direction of the first strain gage,
Wherein the fallout monitoring unit compares the measured shear stress with a maximum shear stress and issues a fall warning when the ratio of the maximum shear stress to the shear stress exceeds a predetermined range. delete delete delete The method according to claim 1,
Wherein the stress detection sensor comprises three different strain gauges arranged longitudinally in the x, y and z axial directions, respectively. The method according to claim 1,
Wherein the stress detection sensor comprises:
A wire having one end fixed to the slope and the other end fixed to the rock block; And
And at least one strain gauge attached to the wire to measure a fine displacement of the wire deformed by a force applied to the wire. The method according to claim 1,
Wherein the stress detection sensor is installed at at least one position between the slope and the rock block to form a stress detection sensor network. The method according to claim 1,
Further comprising an alarm unit for issuing a fall risk warning. delete delete delete delete
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110390800A (en) * 2019-06-06 2019-10-29 北京市地质研究所 Net formula disaster monitoring and early-warning system
KR102102187B1 (en) * 2018-11-05 2020-05-29 국립공원공단 Rock-Falling Sensing System Using Data-logger
CN114495434A (en) * 2022-02-08 2022-05-13 北京寒武智能科技有限公司 Landslide disaster critical-sliding prediction and forecast method
CN117809429A (en) * 2024-02-26 2024-04-02 安岩智能科技(常州)有限公司 Unsteady rock mass monitoring devices that breaks

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Publication number Priority date Publication date Assignee Title
JPH10197296A (en) * 1997-01-07 1998-07-31 Hitachi Eng & Services Co Ltd Regional monitoring system for soil or baserock collapse and central monitoring system
JP2008215913A (en) * 2007-03-01 2008-09-18 Kinki Regional Development Bureau Ministry Of Land Infrastructure & Transport Falling stone risk determination system
KR20120037553A (en) * 2010-10-12 2012-04-20 한국유지관리 주식회사 System for monitoring wire strand using usn
JP2015004585A (en) * 2013-06-20 2015-01-08 国立大学法人 東京大学 Ground stress sensor and earth pressure detection device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10197296A (en) * 1997-01-07 1998-07-31 Hitachi Eng & Services Co Ltd Regional monitoring system for soil or baserock collapse and central monitoring system
JP2008215913A (en) * 2007-03-01 2008-09-18 Kinki Regional Development Bureau Ministry Of Land Infrastructure & Transport Falling stone risk determination system
KR20120037553A (en) * 2010-10-12 2012-04-20 한국유지관리 주식회사 System for monitoring wire strand using usn
JP2015004585A (en) * 2013-06-20 2015-01-08 国立大学法人 東京大学 Ground stress sensor and earth pressure detection device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102102187B1 (en) * 2018-11-05 2020-05-29 국립공원공단 Rock-Falling Sensing System Using Data-logger
CN110390800A (en) * 2019-06-06 2019-10-29 北京市地质研究所 Net formula disaster monitoring and early-warning system
CN114495434A (en) * 2022-02-08 2022-05-13 北京寒武智能科技有限公司 Landslide disaster critical-sliding prediction and forecast method
CN114495434B (en) * 2022-02-08 2024-01-12 北京寒武智能科技有限公司 Landslide hazard temporary slip prediction method
CN117809429A (en) * 2024-02-26 2024-04-02 安岩智能科技(常州)有限公司 Unsteady rock mass monitoring devices that breaks
CN117809429B (en) * 2024-02-26 2024-05-03 安岩智能科技(常州)有限公司 Unsteady rock mass monitoring devices that breaks

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