CN117007506B - Tailing dam loading test method under influence of lens body - Google Patents
Tailing dam loading test method under influence of lens body Download PDFInfo
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- 238000010998 test method Methods 0.000 title claims abstract description 12
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- 238000002347 injection Methods 0.000 claims abstract description 32
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- 238000012544 monitoring process Methods 0.000 claims description 26
- 230000008859 change Effects 0.000 claims description 17
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- 230000008595 infiltration Effects 0.000 claims description 6
- 238000001764 infiltration Methods 0.000 claims description 6
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Abstract
The invention provides a tailing dam loading test method under the influence of a lens body, which comprises the following steps of: collecting basic data of an actual tailing dam project; constructing a tailing dam simulation main body in the test box according to basic data, wherein a plurality of pore water pressure sensing devices are arranged in the tailing dam simulation main body; setting a loading device, a liquid injection device and a shooting system for shooting a tailing dam simulation main body; the controller is used for controlling the opening/closing of the loading device and the liquid injection device to simulate the load and the ore drawing process generated during the tailing deposition respectively until the tailing dam simulation main body is unstable; and receiving dam slope instability evolution information acquired by the pore water pressure sensing devices and the camera system in real time, and analyzing and processing the dam slope instability evolution information to obtain a processing result. The method is used for simulating the dam slope destabilization whole process of the tailing dam, and the treatment result can reveal the damage mechanism under the action of fluid-solid coupling of the upstream type tailing dam slope under different lens body distribution.
Description
Technical Field
The invention relates to the technical field of mine safety, in particular to a tailing dam loading test method under the influence of a lens body.
Background
The tailing pond is to extract useful matters from the coarse ore, and then to add water into the produced waste to prepare pulp with certain concentration, which forms a hydraulic sediment structure under the action of self gravity and hydrodynamic force. Tailings ponds can be roughly classified into valley type, hillside type and flat bottom type according to the different topography conditions. The tailing pond is a dangerous source with high potential energy, and once the tailing pond breaks a dam, debris flow can be generated, so that serious threat can be caused to residents and implementation safety of the downstream tailing pond.
At present, an upstream type dam piling method is commonly used in China, and a lens interlayer consisting of tailing mud is formed in a tailing dam due to differences in ore drawing speed, ore pulp concentration, tailing particle components and the like in the dam building process.
The existence of the lens body destroys the normal deposition rule; when the upstream method is adopted for building the dam, the interlayer of the lens body is easy to form the foundation of the upstream sub-dam, and the requirement of bearing capacity is difficult to meet; and vertical infiltration is seriously hindered by some fine mud interlayer lens bodies, so that infiltration lines are raised, and the stability of the dam body is directly endangered.
Disclosure of Invention
The invention provides a tailing dam loading test method under the influence of a lens body, which is used for simulating the whole process of destabilization of the tailing dam body and analyzing and processing simulation results.
The application provides a tailing dam loading test method under the influence of a lens body, which comprises the following steps:
collecting basic data of an actual tailing dam project; wherein,
the basic data comprise the spatial distribution condition of at least one lens body formed in the process of constructing a tailing dam;
constructing a tailing dam simulation main body in a test box according to basic data; wherein,
a plurality of pore water pressure sensing devices are arranged in the tailing dam simulation main body;
setting a loading device, a liquid injection device and an imaging component for imaging a tailing dam simulation main body;
the controller is used for controlling the opening/closing of the loading device and the liquid injection device to simulate the load and the ore drawing process generated during the tailing deposition respectively until the tailing dam simulation main body is unstable;
and receiving dam slope instability evolution information acquired by the pore water pressure sensing devices and the camera shooting parts in real time, and analyzing and processing the dam slope instability evolution information to obtain a processing result.
Preferably, the dam slope instability evolution information includes:
the method comprises the steps of respectively acquiring pressure values of pore water pressure sensing devices in the whole dam slope destabilization process, monitoring a first monitoring video of a main body dam slope simulated by the tailing dam, and monitoring a second monitoring video of a main body infiltration line simulated by the tailing dam.
Preferably, the loading device comprises an air supply device and an inflatable air bag, a pressure sensor is arranged on the inflatable air bag, and the inflatable air bag is positioned between the top surface of the test box and the dam crest of the tailing dam simulation main body and is fixedly connected with the test box through a bracket; wherein,
an air filtering device is arranged in the inflatable air bag;
the step of controlling the loading device to be opened/closed by the controller to simulate the load generated during tailing deposition specifically comprises the following steps:
receiving a starting instruction sent by a terminal, and starting an air supply device to inflate an inflatable air bag;
and receiving the pressure value acquired by the pressure sensor in real time, comparing the pressure value with a first preset threshold value, and closing the air supply device when the pressure value is equal to the preset threshold value to stop air supply.
Preferably, the step of controlling the on/off of the priming device by the controller to simulate the ore drawing process specifically includes:
after the air supply device is closed, the liquid injection device is started to supply water into an open cavity formed by the side wall of the inflatable air bag, the dam top and the box wall of the test box;
closing the liquid injection device when the water injection quantity reaches the preset water quantity, and stopping water injection;
confirming the change condition of the pressure data acquired by the pore water pressure sensing devices, and starting the liquid injection device again when the pressure data are not changed any more;
repeating the judging steps until the dam body is unstable.
Preferably, the step of analyzing and processing the dam instability evolution information includes:
performing attribute assignment on each pressure node according to the pressure node network; wherein,
the attribute assignment includes: pressure interval assignment, pressure relevance assignment and loading time assignment;
performing unsteady evolution judgment on each pressure node according to the attribute assignment; wherein,
the instability evolution judgment comprises the steps of generating a pore water pressure-time change curve of each pore water pressure sensing device;
determining a destabilization node according to a gap water pressure-time change curve, and acquiring evolution data of destabilization evolution; wherein,
the evolution data includes: evolution time, evolution stability failure parameters, instability time points and evolution data.
Preferably, the step of analyzing and processing the dam instability evolution information further includes:
extracting a first frame image and a last frame image of a first monitoring video to obtain a first dam slope image and a second dam slope image;
graying treatment is carried out on the first dam slope image and the second dam slope image to obtain a first gray level image and a second gray level image;
and determining the area and the position of dam slope instability according to the first gray level image and the second gray level image.
Preferably, the specific step of determining the area and the position of dam slope instability according to the first gray level image and the second gray level image includes:
performing differential processing on the first gray level image and the second gray level image;
marking pixel points with gray values larger than or equal to a preset pixel threshold value;
connecting all marked pixel points, and calculating the area of a connecting area;
and extracting the contour of the area with the largest area to obtain the coordinate position of dam slope instability.
Preferably, the base material further comprises mechanical data of the tailings.
Preferably, the loading test method further comprises:
constructing a geometric distribution model of the tailings dam lens body based on a fractal random function method according to the basic data;
establishing a large-scale three-dimensional random field;
determining the space variability of tailing parameters and the space-time variability of the lens body according to the large-scale three-dimensional random field and the geometrical distribution model of the lens body of the tailing dam;
establishing a tailing dam numerical simulation model of the space-material parameter variability of the lens body according to the influence of the space variability of the tailing parameter and the space-time variability of the lens body;
and verifying a tailing dam numerical simulation model of the lens space-material parameter variability by using a processing result.
Preferably, the loading test step further includes:
carrying out graying treatment on the image in the second monitoring video to obtain an image to be treated;
determining demarcation points according to the difference of color components of pixel points in the image to be processed so as to divide the image to be processed into an infiltrated area and an unimpregnated area;
marking each demarcation point and communicating each demarcation point.
The beneficial effects of the invention are as follows:
and simulating the whole destabilization process of the dam body by a loading test system constructed by the test box, the tailing dam simulation system, the loading device, the liquid injection device, the controller, the pressure sensor and the camera device to obtain a processing result. According to the processing result, the change rules of the displacement field and the seepage field in the whole destabilization process and the evolution process of the displacement field of the sliding surface of the destabilization landslide can be summarized, and a foundation is provided for revealing the progressive failure mechanism of the destabilization of the tailing dam under the influence of the lens body.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a flow chart of a method for testing the loading of a tailings dam under the influence of a lens body according to an embodiment of the present invention;
FIG. 2 is a flow chart of the controller for controlling the on/off of the priming device to simulate the ore drawing process in the embodiment of the present invention;
FIG. 3 is a flow chart of area and position acquisition for analyzing and processing dam instability evolution information in an embodiment of the present invention;
FIG. 4 is a flowchart of a specific position acquisition process for analyzing and processing dam instability evolution information in an embodiment of the present invention;
fig. 5 shows a structure of a physical simulation experiment device for a tailing dam loading experiment in an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
The embodiment of the invention provides a tailing dam loading test method under the influence of a lens body, which comprises the following steps of:
s001: collecting basic data of actual tailing dam engineering, wherein the basic data comprises the spatial distribution condition of lens bodies in the tailing dam;
s002: constructing a tailing dam simulation main body in a test box according to basic data, wherein a plurality of pore water pressure sensing devices are arranged in the tailing dam simulation main body;
s003: setting a loading device, a liquid injection device and a shooting system for shooting a tailing dam simulation main body;
s004: and the controller is used for controlling the opening/closing of the loading device and the liquid injection device to simulate the load and the ore drawing process generated during the tailing deposition respectively until the tailing dam simulate the main body to be unstable.
S005: and receiving dam slope instability evolution information acquired by the pore water pressure sensing devices and the camera system in real time, and analyzing and processing the dam slope instability evolution information to obtain a processing result.
The working principle of the technical scheme is as follows:
as shown in fig. 1, the application is a device structure for carrying out entity simulation and further realizing a lens loading test of a tailing dam, as shown in fig. 5, the device structure is a device structure for carrying out specific entity simulation experiments of the application, a high-speed camera for observing and collecting data, a lens body for carrying out experimental operation, a hole pressure sensor for realizing experimental sensing, an air bag for carrying out pressure simulation, a water injection system for carrying out flood simulation, a data acquisition system for carrying out data acquisition and a data acquisition device, and the whole entity simulation system is formed.
In order to accurately simulate the whole engineering main body of the tailing dam to the maximum extent, the engineering data of the tailing dam in the existing scene can be collected. The method comprises the steps of carrying out field actual measurement on a tailing pond ore drawing pipe orifice, a sector intersection area and an unintersection area, adopting a field actual measurement mode of an unmanned plane and a camera scanning device to realize basic structure data, topography data, mineral distribution data and the like of a tailing dam, directly acquiring dam building data of the tailing dam, wherein various simulated tailing dam distribution scenes exist in the distribution situation of the tailing dam, and further reflecting various different tailing dam space distribution situations through a lens body to carry out various different loading tests.
In the concrete implementation process, the basic data are field actual measurement data of the actual tailing dam engineering, the actual tailing dam engineering usually adopts an upstream type pushing dam for building, and a plurality of lens body interlayers with different sizes and different thicknesses are formed in the dam body due to the influence of ore drawing parameters in the dam building process, namely, the loading test representing the spatial distribution of a plurality of different tailing dams is performed.
The tailings dam simulation system is constructed in the lens body device by referring to the dam construction process of an actual tailings dam, an upstream dam pushing method is adopted in the construction of a tailings dam simulation main body, and in the construction process, the ore drawing parameters can be controlled by utilizing foundation data actually measured on site, so that a plurality of lens body interlayers are formed in the tailings dam simulation main body.
During simulation, fine sand tailings can be adopted in the tailings dam, and under the condition of upstream tailings dam building, the sand layer contains silt sand or a argillaceous interlayer, an argillaceous deposition layer and an argillaceous lens body in the argillaceous deposition layer. The test box can be set to transparent observable material, and the length of the tailing dam simulation main body is smaller than that of the test box, so that enough space is reserved for the leaked tailings, and the influence on the test effect is avoided. The arrangement mode of the pore water pressure sensing devices can be set according to actual needs, and the pore water pressure sensing devices are preferably arranged around the lens body interlayer and can be used for measuring the osmotic water pressure change in the tailings dam simulation main body in the destabilization whole process.
And constructing a tailing dam simulation system, and controlling a loading device and a liquid injection device by using a controller to simulate the load and the ore drawing process generated during tailing deposition respectively so as to develop a dam body damage test. And in the whole process of dam slope instability simulation, the information collected by the pressure sensing device and the camera device is processed and analyzed to obtain an analysis result.
The beneficial effects of the technical scheme are as follows:
and simulating the whole destabilization process of the dam body by a loading test system constructed by the test box, the tailing dam simulation system, the loading device, the liquid injection device, the controller, the pressure sensor and the camera device to obtain a processing result. According to the processing result, the change rules of the displacement field and the seepage field in the whole destabilization process and the evolution process of the displacement field of the sliding surface of the destabilization landslide can be summarized, and a foundation is provided for revealing the progressive failure mechanism of the destabilization of the tailing dam under the influence of the lens body.
Specifically, the dam slope instability evolution information comprises pressure values respectively acquired by each pore water pressure sensing device in the whole dam slope instability process, a first monitoring video for monitoring the dam slope of the tailing dam simulation main body and a second monitoring video for monitoring the infiltration line of the tailing dam simulation main body.
The first monitoring video and the second monitoring video are shot by adopting different shooting devices. During shooting, only the part below the loading device is shot, so that interference is reduced, and subsequent data processing is facilitated. The first monitoring video is collected through the high-definition camera device, so that the accuracy of analog identification is improved, and the second monitoring video is collected through the infrared scanning type monitoring camera device, so that the measurement of the immersion line is facilitated.
Specifically, the loading device comprises an air supply device and an inflatable air bag, wherein the inflatable air bag is provided with a pressure sensor, is positioned between the top surface of the test box and the dam crest of the tailing dam simulation main body, and is fixedly connected with the test box through a bracket;
s004: the step of controlling the loading device to be turned on/off by the controller to simulate the load generated during tailings deposit specifically comprises the following steps:
receiving a starting instruction sent by a terminal, and starting an air supply device to inflate an inflatable air bag;
and receiving the pressure value acquired by the pressure sensor in real time, comparing the pressure value with a first preset threshold value, and closing the air supply device when the pressure value is equal to the preset threshold value to stop air supply.
The principle of the technical scheme is as follows:
the application converts the pressurizing device into the pressurizing device for supplying air by the air bag, and in a normal case, the pressurizing device formed by the motor is adopted, and the pressure of the pressurizing device is directly applied in the test box, at the moment, because of the problem of air quality and different gas concentrations in the air, the pressurizing device can realize the pressurizing, and the pressurizing is inaccurate.
This application has adopted the inflatable bag, and the inside gas filtration device that exists of inflatable bag can realize the gas of the acquisition test condition of more stability through gas filtration device, and direct pressure device is because the air is too miscellaneous, also can lead to the pressure inaccurate.
The utility model discloses a through the filtration of inflatable balloon, not only can make pressure more accurate, can carry out pressure detection moreover according to gas flow, it is corresponding with pressure sensor according to gas flow's pressure detection, constitute the function of feedback pressure dynamic adjustment.
And then the load process is controlled by the controller to realize air supply control.
The beneficial effects of the technical scheme are as follows:
the controller is utilized to automatically control the opening and closing of the loading device, and manual intervention is not needed. Because the inflatable air bag is fixedly connected with the test box, the inflatable air bag cannot fall off when the dam slope is unstable, and the test result is prevented from being polluted.
Specifically, the step of controlling the opening/closing of the priming device by the controller to simulate the ore drawing process specifically includes:
after the air supply device is closed, the liquid injection device is started to supply water into an open cavity formed by the side wall of the inflatable air bag, the dam top and the box wall of the test box;
closing the liquid injection device when the water injection quantity reaches the preset water quantity, and stopping water injection;
confirming the change condition of the pressure data acquired by the pore water pressure sensing devices, and starting the liquid injection device again when the pressure data are not changed any more;
repeating the judging steps until the dam body is unstable.
The principle of the technical scheme is as follows:
as shown in fig. 2, the water supply loading test of the tailing dam is realized by injecting liquid after the air supply device is closed, namely when the pressure reaches the preset pressure parameter, and water flow can be accurately controlled when the test is performed by forming water supply in the open cavity; and preventing the pre-set simulated tailings dams from being washed by water flow due to too fast liquid injection.
And after the water injection quantity reaches the preset requirement, performing pressure detection again, controlling the pressure to reach an equilibrium pressure, and realizing the liquid injection at the moment, thereby realizing the tailing dam loading test under the specific pressure.
The beneficial effects of the technical scheme are as follows:
the controller confirms whether to start the liquid injection device according to the change condition of the pressure data, water is injected in sections, the dam body is fully infiltrated, the change condition of the position of an infiltration line can be reflected better, and the ore drawing process is simulated.
Specifically, the step of analyzing and processing the dam instability evolution information specifically includes:
acquiring each pore water pressure sensing device and generating a pressure node network based on a three-dimensional coordinate system;
performing attribute assignment on each pressure node according to the pressure node network; wherein,
the attribute assignment includes: pressure interval assignment, pressure relevance assignment and loading time assignment;
performing unsteady evolution judgment on each pressure node according to the attribute assignment; wherein,
the instability evolution judgment comprises the steps of generating a pore water pressure-time change curve of each pore water pressure sensing device;
determining a destabilization node according to a gap water pressure-time change curve, and acquiring evolution data of destabilization evolution; wherein,
the evolution data includes: evolution time, evolution stability failure parameters, instability time points and evolution data.
The principle of the technical scheme is as follows:
in the information analysis process of dam instability evolution, the attribute assignment of the pressure node network is adopted, so that the relevance among pressure intervals, different composition structures and different pressure sensing points of the dam body and the test time of a loading test can be judged in the process of evolution, the pore water pressure-time change curve relative to the pressure node network in the whole process of dam body instability is judged, and the whole evolution data of the dam body in the process of instability evolution is determined.
The beneficial effects of the technical scheme are that:
the evolution mode of the dam body stability losing method and device is to conduct evolution through the mode of assigning values to each pressure node, therefore, the evolution process can be directly converted into evolution data, the whole process of dam body stability losing is accurately judged, the whole data of stability losing is obtained, and the test result is more accurate.
Specifically, the step of analyzing and processing the dam instability evolution information further comprises the following steps:
extracting a first frame image and a last frame image of a first monitoring video to obtain a first dam slope image and a second dam slope image;
graying treatment is carried out on the first dam slope image and the second dam slope image to obtain a first gray level image and a second gray level image;
and determining the area and the position of dam slope instability according to the first gray level image and the second gray level image.
The principle of the technical scheme is as follows:
as shown in fig. 3, in the aspect of judging the specific position and the area of the dam body instability, the test of the application is based on the first frame image and the last frame image of the first monitoring video, namely the initial image and the last image of the test video, and the area and the position of the instability are determined through the comparison of the two images;
in this process, the present application adopts the graying process, and the gray value of each pixel point can be used for judging when the destabilization judgment is performed, so that the detail judgment is more accurate, in the prior art, the subtle difference of the pixels can not be judged by the image contrast recognition mode, and the judgment can be realized after the graying.
In addition, in the process of gray level determination, the practical dam body and image comparison test mode cannot get rid of the concept of limit balance, namely, the dam body is unstable, but cannot be seen from the appearance, after gray level, because the dam body is unstable, the tiny concave part of the dam body is caused, and the high-definition image cannot be in other places, the gray level value can be used for determination, after gray level, the tiny concave part or the liquid immersed place can be distinguished through gray level value discovery, so that the time of unstable determination is more accurate. The high-definition image cannot be used for determining the fine distinction in a micro-concave position or a liquid immersed position in a contrast mode.
Specifically, determining the area and the position of dam slope instability according to the first gray level image and the second gray level image specifically includes:
performing differential processing on the first gray level image and the second gray level image;
marking pixel points with gray values larger than or equal to a preset pixel threshold value;
connecting all marked pixel points, and calculating the area of a connecting area;
and extracting the contour of the area with the largest area to obtain the coordinate position of dam slope instability.
The principle of the technical scheme is as follows:
as shown in fig. 4, specific gray values of different pixels of two images can be calculated by a differential processing mode, and further, by marking the pixels with gray values greater than or equal to a preset pixel threshold, after the application of graying, finer distinction can be found in a mode of determining contrast relative to the images, so that an unstable region can be determined more finely, and extraction of the outline of the unstable region can be realized.
The beneficial effects of the technical scheme are as follows: and differentiating the first frame image and the last frame image of the first monitoring video after the graying treatment, marking and connecting pixel points with gray values larger than or equal to a preset pixel threshold value, so as to obtain the area and the position of dam slope instability, and providing a basis for summarizing the change rule of the displacement field in the whole dam body instability process.
Specifically, the base material also includes mechanical data of the tailings.
The mechanical data of the tailings comprise the weight of the tailings, the friction force of the tailings, and the stability of the tailings in different liquid states, namely the stress data of the tailings.
Specifically, the loading test method further comprises the following steps:
constructing a geometric distribution model of the tailings dam lens body based on a fractal random function method according to the basic data;
establishing a large-scale three-dimensional random field;
establishing a tailing dam numerical simulation model taking the space-material parameter variability of the lens body into consideration according to the influence of the space variability of the tailing parameters and the space-time variability of the lens body;
and verifying a tailing dam numerical simulation model considering the space-material parameter variability of the lens body by using a processing result.
The principle of the technical scheme is as follows:
the fractal random function method is a fractal set obtained by random fractal, and the fractal body does not have characteristic dimensions, so that when a geometric distribution model of the tailing dam lens body is constructed, more types of geometric distribution models can be constructed according to different surfaces of the tailing dam lens body, and then random constraint is realized through a large-scale three-dimensional random field, so that the space variability of tailing parameters is determined; the large-scale three-dimensional random field is a three-dimensional constraint field of a tailing dam and is used for judging variability of the tailing dam in space-time structural space, namely variation parameters calculated by comparing the variability with an initial tailing dam and variability of observation parameters of a lens body under different pressures and liquid injection amounts in the lens body during a lens body test, for example, parameters of the lens body, which need to be improved due to a photographing focal length caused by liquid after the liquid is injected, so that a tailing dam numerical simulation model of the space-material parameter variability of the lens body is formed through the influence of the space variability of the tailing parameter and the space-time variability of the lens body, verification of a simulation process is carried out through record of evolution analysis, and therefore the simulation model of numerical calculation is continuously optimized and fed back to the process of a loading test.
The beneficial effects of the technical scheme are as follows:
and verifying the constructed numerical simulation model of the tailing dam by using the processing result of the data in the dam slope destabilization process, thereby improving the reliability of the numerical simulation model.
Specifically, the loading test step further includes:
carrying out graying treatment on the image in the second monitoring video to obtain an image to be treated;
determining demarcation points according to the difference of color components of pixel points in the image to be processed so as to divide the image to be processed into an infiltrated area and an unimpregnated area;
marking each demarcation point and communicating each demarcation point.
The beneficial effects of the technical scheme are as follows:
and dividing each image to be processed in the second monitoring video into an infiltrated area and an unimpregnated area by utilizing the difference of the color components, and communicating each demarcation point to form an infiltrated line, so that the change condition of the infiltrated line can be clearly displayed, and the subsequent analysis is convenient.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (7)
1. The tailing dam loading test method under the influence of the lens body is characterized by comprising the following steps of:
collecting basic data of an actual tailing dam project; wherein,
the basic data comprise the spatial distribution condition of at least one lens body formed in the process of constructing a tailing dam;
constructing a tailing dam simulation main body in a test box according to basic data; wherein,
a plurality of pore water pressure sensing devices are arranged in the tailing dam simulation main body;
setting a loading device, a liquid injection device and an imaging component for imaging a tailing dam simulation main body;
the controller is used for controlling the opening/closing of the loading device and the liquid injection device to simulate the load and the ore drawing process generated during the tailing deposition respectively until the tailing dam simulation main body is unstable;
receiving dam slope instability evolution information acquired by a plurality of pore water pressure sensing devices and a camera component in real time, and analyzing and processing the dam slope instability evolution information to obtain a processing result;
the dam slope instability evolution information comprises:
the method comprises the steps of respectively acquiring pressure values, a first monitoring video of a main body dam slope simulated by a monitoring tailing dam and a second monitoring video of a main body infiltration line simulated by the monitoring tailing dam by a pore water pressure sensing device in the dam slope destabilization whole process;
the basic data also comprises mechanical data of tailings;
the loading test method further comprises the following steps:
constructing a geometric distribution model of the tailings dam lens body based on a fractal random function method according to the basic data;
establishing a large-scale three-dimensional random field;
determining the space variability of tailing parameters and the space-time variability of the lens body according to the large-scale three-dimensional random field and the geometrical distribution model of the lens body of the tailing dam;
establishing a tailing dam numerical simulation model of the space-material parameter variability of the lens body according to the influence of the space variability of the tailing parameter and the space-time variability of the lens body;
and verifying a tailing dam numerical simulation model of the lens space-material parameter variability by using a processing result.
2. The method for loading the tailings dam under the influence of the lens body according to claim 1, wherein the loading device comprises an air supply device and an inflatable air bag, a pressure sensor is arranged on the inflatable air bag, and the inflatable air bag is positioned between the top surface of the test box and the dam top of the tailings dam simulation main body and is fixedly connected with the test box through a bracket; wherein,
an air filtering device is arranged in the inflatable air bag;
the step of controlling the loading device to be opened/closed by the controller to simulate the load generated during tailing deposition specifically comprises the following steps:
receiving a starting instruction sent by a terminal, and starting an air supply device to inflate an inflatable air bag;
and receiving the pressure value acquired by the pressure sensor in real time, comparing the pressure value with a first preset threshold value, and closing the air supply device when the pressure value is equal to the preset threshold value to stop air supply.
3. The method for testing tailing dam loading under influence of lens body according to claim 2, wherein the step of controlling the on/off of the priming device by the controller to simulate the ore drawing process specifically comprises:
after the air supply device is closed, the liquid injection device is started, and water is supplied in an opening cavity formed among the side wall of the inflatable air bag, the dam top and the box wall of the test box;
closing the liquid injection device when the water injection quantity reaches the preset water quantity, and stopping water injection;
confirming the change condition of the pressure data acquired by the pore water pressure sensing devices, and starting the liquid injection device again when the pressure data are not changed any more;
repeating the judging steps until the dam slope is unstable.
4. The method for testing the loading of the tailings dam under the influence of the lens body according to claim 1, wherein the step of analyzing and processing the dam slope instability evolution information comprises the following steps:
performing attribute assignment on each pressure node according to the pressure node network; wherein,
the attribute assignment includes: pressure interval assignment, pressure relevance assignment and loading time assignment;
performing unsteady evolution judgment on each pressure node according to the attribute assignment; wherein,
the instability evolution judgment comprises the steps of generating a pore water pressure-time change curve of each pore water pressure sensing device;
determining a destabilization node according to a gap water pressure-time change curve, and acquiring evolution data of destabilization evolution; wherein,
the evolution data includes: evolution time, evolution stability failure parameters, instability time points and evolution data.
5. The method for testing the loading of a tailings dam under the influence of a lens body according to claim 1, wherein the step of analyzing and processing the dam slope instability evolution information further comprises:
extracting a first frame image and a last frame image of a first monitoring video to obtain a first dam slope image and a second dam slope image;
graying treatment is carried out on the first dam slope image and the second dam slope image to obtain a first gray level image and a second gray level image;
and determining the area and the position of dam slope instability according to the first gray level image and the second gray level image.
6. The method for testing the loading of the tailings dam under the influence of the lens body according to claim 5, wherein the specific step of determining the area and the position of dam slope instability according to the first gray level image and the second gray level image comprises the following steps:
performing differential processing on the first gray level image and the second gray level image;
marking pixel points with gray values larger than or equal to a preset pixel threshold value;
connecting all marked pixel points, and calculating the area of a connecting area;
and extracting the contour of the area with the largest area to obtain the coordinate position of dam slope instability.
7. A method of testing tailings dam loading under the influence of a lens body as claimed in claim 3, wherein the loading testing step further comprises:
carrying out graying treatment on the image in the second monitoring video to obtain an image to be treated;
determining demarcation points according to the difference of color components of pixel points in the image to be processed so as to divide the image to be processed into an infiltrated area and an unimpregnated area;
marking each demarcation point and communicating each demarcation point.
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