CN116146280A - Method and device for analyzing trend and area of coal wall caving of fully mechanized coal mining face - Google Patents
Method and device for analyzing trend and area of coal wall caving of fully mechanized coal mining face Download PDFInfo
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Abstract
The invention provides a fully-mechanized coal face coal wall caving trend and area analysis method and device, and relates to the technical field of coal seam exploitation. The method comprises the following specific steps: acquiring angle data of a target monitoring position sent by a triaxial inclination sensor in the advancing direction of a working surface; collecting first column pressure data and second column pressure data; determining the pose type of the whole frame; generating a two-dimensional thermodynamic diagram of the pressure distribution of the stand column of the integral hydraulic support of the working face; obtaining the change limit of the combined force acting point of the hydraulic support top beam, and generating a two-dimensional thermodynamic diagram of the stress distribution of the whole hydraulic support top beam of the working face; and acquiring a first ledge range labeling image and a second ledge range labeling image, and acquiring an early warning level of a ledge area of the coal wall of the working face according to the pose type. According to the method, the ledge area is identified through joint analysis of the angle data and the pressure distribution two-dimensional thermodynamic diagram of the target monitoring position, the corresponding early warning level is obtained, the danger caused by the ledge area is avoided, and the safe and efficient stoping of the working face is ensured.
Description
Technical Field
The disclosure relates to the technical field of coal seam mining, in particular to a method and a device for analyzing trends and areas of coal wall caving of a fully mechanized coal face.
Background
The coal wall caving is a technical problem of mining of a large mining height working face of a medium-thickness coal seam, the caving increases the probability of roof falling of the working face, the safe and efficient mining of the working face of the medium-thickness coal seam is seriously affected, particularly the working face with the super-large mining height (more than 6 meters), the mining efficiency of the working face is restricted, and the life safety of underground workers is seriously threatened.
The reduction of the working resistance of the upper support of the working face causes the advanced supporting pressure of the coal wall to be increased, the plastic area range of the coal wall and the accumulated deformation energy to be increased, and finally the coal wall caving is caused. The images of the coal wall caving factors are numerous, and the coal wall caving factors are increasingly complex with the increase of the complexity of the geological conditions of the working face exploitation. The practical scheme of real-time monitoring of the coal wall caving of the fully mechanized coal mining face at the present stage is mainly video monitoring. However, the video monitoring cannot prompt danger in advance, and is difficult to prompt a worker to keep away from the ledge area in time.
Disclosure of Invention
The disclosure provides a fully mechanized coal face coal wall caving trend and area analysis method and device, which at least solve the problems that danger cannot be prompted in advance in the related art, and staff is difficult to be reminded of being far away from a caving area in time. The technical scheme of the present disclosure is as follows:
According to a first aspect of an embodiment of the present disclosure, there is provided a method for analyzing a trend and a region of a fully-mechanized coal mining face coal wall caving, including:
the three-axis inclination angle sensor is installed at a target monitoring position on the hydraulic support, the angle data of the target monitoring position sent by the three-axis inclination angle sensor in the advancing direction of the working face is collected, and the target monitoring position comprises: the top beam, the shield beam and the base;
collecting first column pressure data of the hydraulic support in the direction of inclination of the working face and second column pressure data of the hydraulic support in the direction of propulsion of the working face;
determining the whole posture category of the hydraulic support according to the angle data of the target monitoring position in the advancing direction of the working face;
generating a working face integral hydraulic support column pressure distribution two-dimensional thermodynamic diagram according to the first column pressure data of the hydraulic support in the working face trend direction, wherein the working face integral hydraulic support column pressure distribution two-dimensional thermodynamic diagram takes a support number as a vertical axis and takes a sampling time point as a horizontal axis;
acquiring a hydraulic support top beam resultant force action point change limit according to the angle data and the second upright post pressure data, and generating a working face integral hydraulic support top beam stress distribution two-dimensional thermodynamic diagram, wherein the working face integral hydraulic support top beam stress distribution two-dimensional thermodynamic diagram takes a support number as a vertical axis and takes a sampling time point as a horizontal axis;
And carrying out image identification processing on the two-dimensional thermodynamic diagram of the column pressure distribution of the integral hydraulic support of the working face and the two-dimensional thermodynamic diagram of the force distribution of the top beam of the integral hydraulic support of the working face to obtain a first ledge range marking image and a second ledge range marking image, and obtaining the early warning level of the ledge area of the coal wall of the working face according to the whole frame pose type of the hydraulic support.
Optionally, after the step of collecting the angle data of the target monitoring position in the advancing direction of the working surface, the method further includes:
and carrying out interpolation processing on the angle data and the second upright post pressure data so as to ensure that the acquisition time of the angle data and the acquisition time of the second upright post pressure data are consistent, and the sampling interval time is consistent.
Optionally, the step of determining the posture category of the hydraulic support according to the angle data of the target monitoring position in the advancing direction of the working face specifically includes:
and acquiring a first angle between the top beam and the gravity vector, a second angle between the shield beam and the gravity vector, and a third angle between the base and the gravity vector in the angle data, wherein the whole frame pose category of the hydraulic support is determined according to the first angle, the second angle and the third angle, and the pose category comprises a risk pose and a risk-free pose.
Optionally, the step of acquiring the change limit of the hydraulic support top beam resultant force acting point according to the angle data and the second column pressure data specifically includes:
if the hydraulic support is a four-column hydraulic support, performing cluster analysis according to second column pressure data corresponding to front and rear columns in the hydraulic support to generate front and rear column pressure cluster diagrams, wherein the front and rear columns comprise: a front upright and a rear upright;
calculating the resultant force action point of the top beam in the hydraulic support at each acquisition time according to the angle data of the target monitoring position in the advancing direction of the working surface and the second upright post pressure data corresponding to the front upright post and the rear upright post;
and taking the connection position of the front upright post and the top beam as a lower boundary of a combined force action point, and taking the connection position of the rear upright post and the top beam as an upper boundary of the combined force action point.
Optionally, the step of acquiring the change limit of the hydraulic support top beam resultant force acting point according to the angle data and the second column pressure data specifically includes:
if the hydraulic support is a two-column hydraulic support, calculating a combined force acting point of the top beam in the hydraulic support at each acquisition time according to angle data of the target monitoring position in the advancing direction of the working surface and second column pressure data corresponding to front and rear columns in the hydraulic support;
And taking the position of the connecting position of the upright post and the top beam, which moves forwards by a preset distance, as the lower boundary of the combined force action point, and taking the position of the connecting position of the upright post and the top beam, which moves backwards by a preset distance, as the upper boundary of the combined force action point.
Optionally, the step of performing image recognition processing on the two-dimensional thermodynamic diagram of the pressure distribution of the stand column of the integral hydraulic support of the working face and the two-dimensional thermodynamic diagram of the stress distribution of the top beam of the integral hydraulic support of the working face specifically includes:
carrying out gray-scale treatment on the upright post pressure distribution two-dimensional thermodynamic diagram of the integral hydraulic support of the working face to obtain an upright post pressure distribution diagram of the integral hydraulic support of the working face;
carrying out gray-scale treatment on the two-dimensional thermodynamic diagram of the bearing distribution of the top beam of the integral hydraulic support of the working face to obtain a bearing distribution diagram of the top beam of the integral hydraulic support of the working face;
acquiring target characteristics corresponding to all hydraulic supports at each time point in a column pressure distribution diagram of the integral hydraulic support of the working face, and carrying out clustering processing according to the target characteristics to acquire a first data clustering sheet;
acquiring target characteristics corresponding to all hydraulic supports at each time point in a top beam pressure distribution diagram of the integral hydraulic support of the working face, and carrying out clustering processing according to the target characteristics to acquire a second data clustering sheet;
And identifying the outlines of the first data clustering slice and the second data clustering slice, and acquiring a first ledge range marked image and a second ledge range marked image according to the outlines.
Optionally, the step of acquiring the early warning level of the coal wall caving area of the working face according to the whole posture category of the hydraulic support specifically comprises the following steps:
taking a hydraulic support which belongs to the first ledge range labeling image and the second ledge range labeling image in the working surface as a to-be-determined support, and acquiring the pose type of the to-be-determined support;
if the pose type of the to-be-determined support is a risk pose and the combined force acting point of the top beam in the to-be-determined hydraulic support is out of the upper limit range and the lower limit range of dynamic change of the combined force acting point, determining the early warning level as a first early warning level;
if the pose type of the to-be-determined support is risk-free pose, and the combined force acting point of the top beam in the to-be-determined hydraulic support is out of the upper limit range and the lower limit range of dynamic change of the combined force acting point, determining that the early warning level is a second early warning level;
if the pose type of the to-be-determined support is a risk pose and the combined force acting point of the top beam in the to-be-determined hydraulic support is within the upper and lower limit ranges of dynamic change of the combined force acting point, determining that the early warning level is a third early warning level;
And if the pose type of the to-be-determined support is risk-free pose, and the combined force acting point of the top beam in the to-be-determined hydraulic support is within the upper and lower limit ranges of dynamic change of the combined force acting point, determining that the early warning level is a fourth early warning level.
According to a second aspect of the embodiments of the present disclosure, there is provided a fully-mechanized coal mining face coal wall caving trend and area analysis device, which is characterized by comprising:
the angle detection module is used for installing a triaxial inclination sensor at a target monitoring position on the hydraulic support, acquiring angle data of the target monitoring position sent by the triaxial inclination sensor in the advancing direction of the working face, wherein the target monitoring position comprises: the top beam, the shield beam and the base;
the pressure acquisition module is used for acquiring first column pressure data of the hydraulic support in the direction of inclination of the working face and second column pressure data of the hydraulic support in the direction of propulsion of the working face;
the pose determining module is used for determining the pose type of the hydraulic support according to the angle data of the target monitoring position in the advancing direction of the working face;
the first thermodynamic diagram generation module is used for generating a working face integral hydraulic support column pressure distribution two-dimensional thermodynamic diagram according to the first column pressure data of the hydraulic support in the working face trend direction, wherein the working face integral hydraulic support column pressure distribution two-dimensional thermodynamic diagram takes a support number as a vertical axis and takes a sampling time point as a horizontal axis;
The second thermodynamic diagram generation module is used for acquiring the change limit of the hydraulic support top beam resultant force action point according to the angle data and the second upright post pressure data and generating a working face integral hydraulic support top beam stress distribution two-dimensional thermodynamic diagram, wherein the working face integral hydraulic support top beam stress distribution two-dimensional thermodynamic diagram takes a support number as a vertical axis and takes a sampling time point as a horizontal axis;
the early warning module is used for carrying out image recognition processing on the two-dimensional thermodynamic diagram of the upright post pressure distribution of the integral hydraulic support of the working face and the two-dimensional thermodynamic diagram of the top beam stress distribution of the integral hydraulic support of the working face so as to obtain a first ledge range marking image and a second ledge range marking image, and acquiring early warning levels of the ledge areas of the coal wall of the working face according to the whole posture category of the hydraulic support.
According to a third aspect of embodiments of the present disclosure, there is provided an electronic device, comprising:
a processor;
a memory for storing the processor-executable instructions;
wherein the processor is configured to execute the instructions to implement the method of any of the first aspects above.
According to a fourth aspect of embodiments of the present disclosure, there is provided a computer readable storage medium, which when executed by a processor of an electronic device, causes the electronic device to perform the method of any one of the first aspects described above.
According to a fifth aspect of embodiments of the present disclosure, there is provided a computer program product comprising a computer program which, when executed by a processor, implements the method according to any of the first aspects described above.
The technical scheme provided by the embodiment of the disclosure at least brings the following beneficial effects:
according to the method, the ledge area is identified through joint analysis of the angle data and the pressure distribution two-dimensional thermodynamic diagram of the target monitoring position, the corresponding early warning level is obtained, the danger caused by the ledge area is avoided, and the safe and efficient stoping of the working face is ensured.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure and do not constitute an undue limitation on the disclosure.
FIG. 1 is a flow chart illustrating a fully mechanized coal face coal wall caving trend and area analysis method, according to an exemplary embodiment.
FIG. 2 is a flow chart illustrating a fully mechanized coal face coal wall caving trend and area analysis method, according to an exemplary embodiment.
FIG. 3 is a flow chart illustrating a fully-mechanized coal mining face coal wall caving trend and area analysis method, according to an exemplary embodiment.
FIG. 4 is a flow chart illustrating a fully-mechanized coal mining face coal wall caving trend and area analysis method, according to an exemplary embodiment.
FIG. 5 is a flow chart illustrating a fully mechanized coal face coal wall caving trend and area analysis method, according to an exemplary embodiment.
FIG. 6 is a block diagram illustrating a fully mechanized coal face coal wall caving trend and area analysis device, according to an exemplary embodiment.
Fig. 7 is a schematic diagram of a hydraulic mount according to an exemplary embodiment.
Fig. 8 is a schematic diagram of the overall pose class of a hydraulic mount according to an exemplary embodiment.
Fig. 9 is a block diagram of an apparatus according to an example embodiment.
Fig. 10 is a block diagram of an apparatus according to an example embodiment.
Detailed Description
In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings.
It should be noted that the terms "first," "second," and the like in the description and claims of the present disclosure and in the foregoing figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the disclosure described herein may be capable of operation in sequences other than those illustrated or described herein. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the disclosure as detailed in the accompanying claims.
The user information (including but not limited to user equipment information, user personal information, etc.) related to the present disclosure is information authorized by the user or sufficiently authorized by each party.
The coal wall caving is a technical problem of mining of a large mining height working face of a medium-thickness coal seam, the caving increases the probability of roof falling of the working face, the safe and efficient mining of the working face of the medium-thickness coal seam is seriously affected, particularly the working face with the super-large mining height (more than 6 meters), the mining efficiency of the working face is restricted, and the life safety of underground workers is seriously threatened.
The reduction of the working resistance of the upper support of the working face causes the advanced supporting pressure of the coal wall to be increased, the plastic area range of the coal wall and the accumulated deformation energy to be increased, and finally the coal wall caving is caused. The images of the coal wall caving factors are numerous, and the coal wall caving factors are increasingly complex with the increase of the complexity of the geological conditions of the working face exploitation. Although the analysis of the coal wall caving mechanism has been advanced to a certain extent, the caving monitoring and early warning in the actual production are still difficult, and the coal wall caving event is more apparent and cannot be monitored and early warned in real time by single data such as bracket pressure, pose and the like.
The practical scheme of real-time monitoring of the coal wall caving on the fully mechanized mining face at the present stage is mainly video monitoring, and as disclosed in the related art, the method and the device for early warning of the underground coal wall caving based on image recognition comprise the following specific steps: acquiring video data of a target coal mining area; converting the video data of the target coal mining area into each frame of picture, and carrying out image enhancement processing on each frame of picture to obtain a corresponding picture to be identified; obtaining candidate region information on each frame of picture to be identified according to each frame of picture to be identified and a coal wall ledge scene identification model, wherein the candidate region information comprises region coordinates and probability values of each candidate region; the coal wall caving scene recognition model is obtained based on historical coal mining picture sets and corresponding coal wall caving scene labels in a training mode; obtaining each picture of the region to be identified according to the candidate region information and the screening threshold value on each picture of the region to be identified; acquiring statement description corresponding to each region picture to be identified according to each region picture to be identified and the image understanding model; the image understanding model is obtained based on a historical region picture set and corresponding semantic tag training; and if the coal wall caving occurrence scene is obtained through analysis according to statement description corresponding to each image of the area to be identified, performing coal wall caving early warning. However, the video monitoring can only find risks in real time, and cannot find risks in advance and prompt.
In the aspect of early warning, the related art discloses a prediction method and a device for coal wall caving of a fully mechanized coal mining face with large mining height, which specifically comprises the following steps: determining the coal body fracture parameter increment value and the bracket load resistivity increment value in a preset time period before the occurrence of the coal wall caving; creating an index scoring model by using the coal body fracture parameter increment value and the bracket load increment resistivity; calculating a comprehensive prediction index of the coal wall caving according to each early warning index value in the early warning monitoring period and the score evaluation rule in the index scoring model; and outputting a prediction result of the coal wall caving of the fully-mechanized coal mining face according to the comprehensive prediction index of the coal wall caving. And the combined prediction of the increment value of the fracture parameter of the coal body and the increment resistivity of the bracket load is realized. However, the real-time dynamic acquisition of the fracture parameters of the coal is difficult.
In order to ensure safe and efficient stoping of a large mining height working face, a more practical large mining height working face coal wall caving trend and area analysis method are necessary to be developed, surrounding rock deformation monitoring and early warning prediction of large mining height working face coal wall caving and the like are realized, and safe and efficient stoping of the large mining height working face is ensured.
For ease of understanding, first, the structure of the hydraulic mount will be described, and fig. 7 is a schematic view of a hydraulic mount according to an exemplary embodiment. As shown in fig. 7, the complete hydraulic mount includes: roof beam 701, stand 702, shield beam 703, connecting rod 704, base 705, pusher gear 706 and side guard 707.
The top beam 701 is in direct contact with the top plate for transmitting supporting force and serves as a load bearing member for roof protection. The top beams 701 of different frame types have different characteristics. Can be divided into integral and sectional hinged type according to the longitudinal connection mode.
The upright 702 supports a hydraulic cylinder which is supported and used for adjusting the height of the support between the base 705 and the top beam 701 or the shield beam 703, and has higher compression-bending strength and sealing performance. The double-acting type hydraulic telescopic mechanism is commonly used, and two telescopic modes of full hydraulic and mechanical adjustment exist.
The shield beams 703 connect the top beams 701 and the base 705 (or links 704), bear the horizontal forces of the support and the pressure of the roof rock caving, and prevent goaf spoil from entering the components of the support. It is the main structural component of the shield type and the support shield type support, and is mostly an integral box-shaped structure.
The base 705 is in direct contact with the floor to transfer support forces and to rest on the load bearing members of the column 702 and other components. Common structural forms are integral and split. The integral type is divided into a bottom seal and a bottom opening; the split type is divided into a left split type, a right split type and a front split type and a back split type.
The pushing device 706 is used for pushing the device of the bracket and the conveyor. The pushing devices of the plurality of brackets are connected between the brackets and the conveyor, so that the brackets can be moved and the conveyor can be pushed at the same time; the minority is that there are independent frame moving devices and pushing conveyor devices, such as a section type bracket and the like. The pushing devices are mostly arranged at the bottom of the bracket, individually arranged on the top beam 701, or arranged up and down. The structure is divided into a frame type, a guide push rod type, a direct acting type and the like. The frame type pushing device utilizes the reverse pushing principle to enable the jack to have larger pushing force for moving the frame, and smaller pulling force for pushing the conveyor, so that different requirements of actual working conditions are met. Guided push rods are commonly used with floating piston jacks or differential principles to reduce thrust.
The side protection device 707 is arranged on the side surface of the top beam 701, the shield beam 703 or the connecting rod 704, and serves as an auxiliary device for gangue blocking, reverse adjustment preventing and the like, and is mostly composed of a jack, a spring, a guide rod, a structural member and the like, so that the hydraulic support can stretch and retract within a certain width range, and is commonly provided with right-angle stretching and hinging.
FIG. 1 is a flow chart illustrating a method for analyzing trends and areas of coal wall caving on a fully mechanized coal mining face, according to an exemplary embodiment, as shown in FIG. 1, the method includes:
In this embodiment, in order to obtain the pose of the hydraulic support, a triaxial tilt sensor is used to obtain the tilt angle of the target monitoring position on the hydraulic support, because the angle between the connecting rod and the shield beam is fixed. The top beam and the shield beam are movable, so that in order to acquire the pose of the hydraulic support, only angle data of the top beam, the shield beam and the base are required to be acquired. Because the advancing direction of the working surface is a fixed direction, the acquired angle data is the angle of an included angle formed between the triaxial inclination sensor and the gravity vector, and the angle data is also called a roll angle (roll), and the range of the angle data is (-180, 180).
And 102, collecting first column pressure data of the hydraulic support in the direction of inclination of the working surface and second column pressure data in the direction of pushing of the working surface.
The inclined direction of the working surface is mutually perpendicular to the advancing direction of the working surface, and the state of the hydraulic support can be analyzed more accurately by combining the column pressure data of the hydraulic support in the two directions.
And step 103, determining the whole posture category of the hydraulic support according to the angle data of the target monitoring position in the advancing direction of the working face.
Under specific pose, the junction of the working face top plate and the coal wall at the upper half part lacks effective support, and the coal wall area supported by the hydraulic support is likely to be subjected to the ledge forming phenomenon under the action of huge mine pressure, so that the whole pose category of the hydraulic support can be used as one of the basis for judging the ledge forming area.
And 104, generating a working face integral hydraulic support column pressure distribution two-dimensional thermodynamic diagram according to the first column pressure data of the hydraulic support in the working face trend direction, wherein the working face integral hydraulic support column pressure distribution two-dimensional thermodynamic diagram takes a support number as a vertical axis and takes a sampling time point as a horizontal axis.
In this embodiment of the present application, the working surface includes a plurality of hydraulic supports, and during analysis, first column pressure data of all hydraulic supports in the working surface need be analyzed to realize the whole analysis to the working surface area. And uniformly sampling according to a certain sampling period to acquire the first column pressure data, and displaying the first column pressure data according to the bracket number and sampling time sequence data of the hydraulic bracket, wherein the value corresponding to each pixel in the two-dimensional thermodynamic diagram of the column pressure distribution of the whole hydraulic bracket of the working face reflects the first column pressure data of the hydraulic bracket corresponding to the longitudinal axis on the time point corresponding to the transverse axis.
And 105, acquiring a hydraulic support top beam resultant force action point change limit according to the angle data and the second upright post pressure data, and generating a working face integral hydraulic support top beam stress distribution two-dimensional thermodynamic diagram, wherein the working face integral hydraulic support top beam stress distribution two-dimensional thermodynamic diagram takes a support number as a vertical axis and takes a sampling time point as a horizontal axis.
The method for generating the two-dimensional thermodynamic diagram of the stress distribution of the top beam of the integral hydraulic support of the working surface is similar to the step 104.
And 106, performing image recognition processing on the two-dimensional thermodynamic diagram of the upright post pressure distribution of the integral hydraulic support of the working face and the two-dimensional thermodynamic diagram of the top beam stress distribution of the integral hydraulic support of the working face to obtain a first ledge range marking image and a second ledge range marking image, and obtaining the early warning level of the ledge area of the coal wall of the working face according to the integral posture category of the hydraulic support.
Optionally, after the step of collecting the angle data of the target monitoring position in the advancing direction of the working surface, the method further includes:
and carrying out interpolation processing on the angle data and the second upright post pressure data so as to ensure that the acquisition time of the angle data and the acquisition time of the second upright post pressure data are consistent, and the sampling interval time is consistent.
In this embodiment, the second column pressure data corresponds to each acquisition time, and the interval between adjacent acquisition times is a fixed sampling period, so as to facilitate analysis. And the angle data and the second upright post pressure data are required to be subjected to uniform time stamping, even if the acquisition time of the angle data and the first pressure data is the same, and the sampling interval time is consistent. The processing is carried out by utilizing algorithms such as interpolation, and the like, specifically: if the angle data does not exist at a certain acquisition time, generating the angle data at the time.
Optionally, the step of determining the posture category of the hydraulic support according to the angle data of the target monitoring position in the advancing direction of the working face specifically includes:
and acquiring a first angle between the top beam and the gravity vector, a second angle between the shield beam and the gravity vector, and a third angle between the base and the gravity vector in the angle data, wherein the whole frame pose category of the hydraulic support is determined according to the first angle, the second angle and the third angle, and the pose category comprises a risk pose and a risk-free pose.
Fig. 8 is a schematic diagram of the overall pose class of a hydraulic mount according to an exemplary embodiment. In fig. 8, the structures of all parts of the hydraulic support in fig. 1 are abstracted into a straight line, and the whole posture of the hydraulic support can be divided into the 9 working conditions on the premise that the hydraulic support normally plays a role in supporting. According to the rock surrounding supporting principle of the bracket, under three postures of working condition 2, working condition 5 or working condition 8, the junction of the top plate of the working surface and the coal wall of the upper half part lacks effective supporting because the top beam of the bracket is low, and the coal wall area supported by the hydraulic bracket is likely to have a ledge phenomenon under the action of huge mine pressure. The pose of the working condition 2, the working condition 5 and the working condition 8 are determined to be the risk pose, and the pose of the other working conditions is set to be the risk-free pose.
FIG. 2 is a flowchart illustrating a method for analyzing trends and areas of coal walls on a fully-mechanized coal mining face, according to an exemplary embodiment, as shown in FIG. 2, step 105 in FIG. 1 specifically includes:
and 203, taking the connection position of the front upright post and the top beam as a lower boundary of a combined force action point, and taking the connection position of the rear upright post and the top beam as an upper boundary of the combined force action point.
In this embodiment, the four-column hydraulic support is divided into a front column and a rear column when seen from the side, wherein the front column comprises two columns, the rear column comprises two columns, the horizontal axis in the generated front and rear column pressure cluster diagram is the front column, the vertical axis represents the rear column, and the diagram comprises a plurality of scattered points.
And calculating the corresponding resultant force action points of the top beams in the hydraulic supports according to the angle data of the target monitoring position in the advancing direction of the working surface and the second column pressure data corresponding to the front and rear columns at the same acquisition moment, wherein the resultant force action points reflect the stressed positions of the cross beams, and under normal conditions, the positions of the resultant force action points on the cross beams are between the upper boundary of the resultant force action points and the lower boundary of the resultant force action points, and if the positions of the resultant force action points on the cross beams exceed the variation limit of the resultant force action points, the abnormal stressed positions of the cross beams of the hydraulic supports are indicated, and the side wall phenomenon possibly occurs.
FIG. 3 is a flowchart illustrating a method for analyzing trends and areas of coal walls on a fully-mechanized coal mining face, according to an exemplary embodiment, as shown in FIG. 3, step 105 in FIG. 1 further includes:
and 302, taking the position of the connecting position of the upright post and the top beam, which moves forwards by a preset distance, as the lower boundary of the combined force action point, and taking the position of the connecting position of the upright post and the top beam, which moves backwards by a preset distance, as the upper boundary of the combined force action point.
In the embodiment, the two-column hydraulic support is only provided with one column from the side, and a front column pressure cluster map and a rear column pressure cluster map do not need to be generated. And calculating the corresponding resultant force action points of the top beams in the hydraulic supports according to the angle data of the target monitoring position in the advancing direction of the working surface and the second column pressure data corresponding to the columns at the same acquisition time, wherein the resultant force action points reflect the stressed positions of the cross beams, and under normal conditions, the positions of the resultant force action points on the cross beams are between the upper boundaries of the resultant force action points and the lower boundaries of the resultant force action points, and if the positions of the resultant force action points on the cross beams exceed the variation boundaries of the resultant force action points, the abnormal stress of the cross beams of the hydraulic supports is indicated, and the ledge phenomenon is likely to occur.
In a possible embodiment, the preset distance is 150mm.
FIG. 4 is a flowchart illustrating a method for analyzing trends and areas of coal walls on a fully-mechanized coal mining face, according to an exemplary embodiment, as shown in FIG. 4, step 106 in FIG. 1 specifically includes:
and 401, carrying out gray-scale treatment on the upright post pressure distribution two-dimensional thermodynamic diagram of the integral hydraulic support of the working face, and obtaining the upright post pressure distribution diagram of the integral hydraulic support of the working face.
And step 402, carrying out gray-scale processing on the two-dimensional thermodynamic diagram of the working face integral hydraulic support top beam stress distribution, and obtaining a working face integral hydraulic support top beam stress distribution diagram.
In this embodiment, the original two-dimensional thermodynamic diagram is an RGB image, wherein each pixel includes values of 3 channels, after the grayscale processing is performed, the values of the RGB of the 3 channels at the same pixel position of the original image are normalized to be 0-255, so as to form a two-dimensional image based on BGR (B: blue; G: green; R: red), and the deeper the Blue of the pixel is, the larger the pressure value is represented.
And step 403, obtaining target characteristics corresponding to all hydraulic supports at each time point in the column pressure distribution diagram of the integral hydraulic support of the working face, and carrying out clustering processing according to the target characteristics to obtain a first data clustering sheet.
The first data clustering sheet corresponds to a working face integral hydraulic support column pressure distribution diagram, and the first data clustering sheet corresponds to a working face integral hydraulic support top beam pressure distribution diagram, and reflects extreme value distribution characteristics of pressures at all hydraulic support columns or top beams at different time points in the working face.
And step 404, obtaining target characteristics corresponding to all hydraulic supports at each time point in the top beam pressure distribution diagram of the integral hydraulic support of the working face, and carrying out clustering processing according to the target characteristics to obtain a second data clustering sheet.
And carrying out characteristic preliminary screening on the working face integral hydraulic support column pressure distribution diagram and the working face integral hydraulic support column pressure distribution diagram, namely sequentially screening extreme values and intervals on all tendency pressure data of the working face at each sampling time point, carrying out characteristic selection on the minimum value and the data of two adjacent supports, clustering the selected characteristics, and carrying out data point connection in a larger range to form a first data clustering sheet and a second data clustering sheet.
And step 405, identifying the outlines of the first data clustering slice and the second data clustering slice, and acquiring a first ledge range labeling image and a second ledge range labeling image according to the outlines.
The actual combined force action points of the support upright posts in the outline of the first side range labeling image are out of the upper limit and the lower limit of the dynamic change of the combined force action points, and the actual combined force action points of the support top beams in the outline of the second data clustering sheet are out of the upper limit and the lower limit of the dynamic change of the combined force action points.
If the actual combined force action point of the support top beam is within the upper limit and the lower limit of the dynamic change of the combined force action point, the support effect of the support is good, and the possibility of the occurrence of the ledge of the coal wall of the working face due to the poor support effect of the support top plate is low; if the actual combined force acting point of the support top beam is below the dynamic change lower limit of the combined force acting point, at the moment, the combined force acting point of the support top beam is in a top beam advance part, the support top beam is in a low head state, the pressure of a top plate of a working face is high, and the phenomenon of coal wall caving is likely to occur.
FIG. 5 is a flowchart illustrating a method for analyzing trends and areas of coal walls on a fully-mechanized coal mining face, according to an exemplary embodiment, as shown in FIG. 5, step 106 in FIG. 1 further includes:
and 501, taking a hydraulic support which belongs to the first ledge range marking image and the second ledge range marking image in the working surface as a pending support, and acquiring the pose type of the pending support.
The actual combined force action point of the support upright post in the first ledge range labeling image is out of the upper limit and the lower limit of the dynamic change of the combined force action point, and the actual combined force action point of the support top beam in the second ledge range labeling image is out of the upper limit and the lower limit of the dynamic change of the combined force action point. When the hydraulic support belongs to the first ledge range marking image and the second ledge range marking image, the probability of occurrence of a coal wall ledge phenomenon at the hydraulic support is extremely high, and the hydraulic support can be used as a pending support.
for the marking range of the marking images of the rib top center and the first rib top range based on the column pressure, and the marking range of the marking images of the rib top center and the first rib top range based on the support top beam stress, the area where the position and the pose of the hydraulic support belong to the working condition 2, the working condition 5 or the working condition 8 can be determined to be a primary early warning area, and the primary early warning area corresponds to the first early warning level.
for the marking range of the marking images of the rib top center and the first rib top range based on the column pressure, and the marking range of the marking images of the rib top center and the first rib top range based on the support top beam stress, the area where the hydraulic support with the pose not belonging to the working condition 2, the working condition 5 or the working condition 8 is located can be determined to be a secondary early warning area, and the secondary early warning area corresponds to a second early warning level.
for the marking range which is not in the marking image of the rib cage center and the first rib cage range based on the column pressure, and the marking range which is not in the marking image of the rib cage center and the first rib cage range based on the support top beam stress, the area where the hydraulic support with the pose belonging to the working condition 2, the working condition 5 or the working condition 8 is located can be determined to be a three-level early warning area, and the third early warning level is corresponding to the third early warning level.
For the marking range which is not in the marking image of the rib cage center and the first rib cage range based on the column pressure and is not in the marking image of the rib cage center and the first rib cage range based on the support top beam stress, the area where the position and the posture of the hydraulic support which is not in the working condition 2, the working condition 5 or the working condition 8 are located can be determined to be a four-level early warning area, and the fourth early warning area is corresponding to the fourth early warning level. The area of the first warning level is substantially free of risk of coal wall caving.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
FIG. 6 is a block diagram illustrating a fully mechanized coal face coal wall caving trend and area analysis device, according to an exemplary embodiment. Referring to fig. 6, the apparatus includes:
The angle detection module 610 is configured to install a triaxial tilt sensor at a target monitoring position on the hydraulic support, collect angle data of the target monitoring position sent by the triaxial tilt sensor in a working surface propulsion direction, where the target monitoring position includes: the top beam, the shield beam and the base;
the pressure acquisition module 620 is configured to acquire first column pressure data of the hydraulic support in a direction of inclination of the working surface and second column pressure data of the hydraulic support in a direction of propulsion of the working surface;
the pose determining module 630 is configured to determine a pose class of the hydraulic support according to angle data of the target monitoring position in a working surface propulsion direction;
a first thermodynamic diagram generating module 640, configured to generate a two-dimensional thermodynamic diagram of a hydraulic support column pressure distribution of the whole hydraulic support on the working surface according to the first column pressure data of the hydraulic support in the direction of inclination of the working surface, where the two-dimensional thermodynamic diagram of the hydraulic support column pressure distribution of the whole hydraulic support on the working surface takes a support number as a vertical axis and takes a sampling time point as a horizontal axis;
the second thermodynamic diagram generating module 650 is configured to obtain a hydraulic support top beam resultant force action point change boundary according to the angle data and the second column pressure data, and generate a working face integral hydraulic support top beam stress distribution two-dimensional thermodynamic diagram, where the working face integral hydraulic support top beam stress distribution two-dimensional thermodynamic diagram uses a support number as a vertical axis and uses a sampling time point as a horizontal axis;
And the early warning module 660 is used for carrying out image recognition processing on the two-dimensional thermodynamic diagram of the upright post pressure distribution of the integral hydraulic support of the working face and the two-dimensional thermodynamic diagram of the top beam stress distribution of the integral hydraulic support of the working face so as to obtain a first ledge range marking image and a second ledge range marking image, and acquiring early warning levels of the ledge areas of the coal wall of the working face according to the whole posture category of the hydraulic support.
The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
Fig. 9 is a block diagram illustrating an apparatus 900 for use in accordance with an example embodiment. For example, apparatus 900 may be a mobile phone, computer, digital broadcast terminal, messaging device, game console, tablet device, medical device, exercise device, personal digital assistant, or the like.
Referring to fig. 9, apparatus 900 may include one or more of the following components: a processing component 902, a memory 904, a power component 906, a multimedia component 908, an audio component 910, an input/output (I/O) interface 912, a sensor component 914, and a communication component 916.
The processing component 902 generally controls overall operations of the apparatus 900, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 902 may include one or more processors 920 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 902 can include one or more modules that facilitate interaction between the processing component 902 and other components. For example, the processing component 902 can include a multimedia module to facilitate interaction between the multimedia component 908 and the processing component 902.
The memory 904 is configured to store various types of data to support operations at the device 900. Examples of such data include instructions for any application or method operating on the device 900, contact data, phonebook data, messages, pictures, videos, and the like. The memory 904 may be implemented by any type of volatile or nonvolatile memory device or combination thereof, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.
The power supply component 906 provides power to the various components of the device 900. Power supply components 906 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for device 900.
The multimedia component 908 comprises a screen between the device 900 and the user that provides an output interface. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or slide action, but also the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 908 includes a front-facing camera and/or a rear-facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the device 900 is in an operational mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.
The audio component 910 is configured to output and/or input audio signals. For example, the audio component 910 includes a Microphone (MIC) configured to receive external audio signals when the device 900 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 904 or transmitted via the communication component 916. In some embodiments, the audio component 910 further includes a speaker for outputting audio signals.
The I/O interface 912 provides an interface between the processing component 902 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.
The sensor assembly 914 includes one or more sensors for providing status assessment of various aspects of the apparatus 900. For example, the sensor assembly 914 may detect the on/off state of the device 900, the relative positioning of the components, such as the display and keypad of the apparatus 900, the sensor assembly 914 may also detect the change in position of the apparatus 900 or one component of the apparatus 900, the presence or absence of user contact with the apparatus 900, the orientation or acceleration/deceleration of the apparatus 900, and the change in temperature of the apparatus 900. The sensor assembly 914 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 914 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 914 may also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 916 is configured to facilitate communication between the apparatus 900 and other devices in a wired or wireless manner. The apparatus 900 may access a wireless network based on a communication standard, such as WiFi, an operator network (e.g., 2G, 3G, 4G, or 5G), or a combination thereof. In one exemplary embodiment, the communication component 916 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component 916 further includes a Near Field Communication (NFC) module to facilitate short range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, apparatus 900 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic elements for executing the methods described above.
In an exemplary embodiment, a storage medium is also provided, such as a memory 904 including instructions executable by the processor 920 of the apparatus 900 to perform the above-described method. Alternatively, the storage medium may be a non-transitory computer readable storage medium, which may be, for example, ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like.
Fig. 10 is a block diagram of an apparatus 1000 according to an exemplary embodiment. For example, the apparatus 1000 may be provided as a server. Referring to fig. 10, apparatus 1000 includes a processing component 1022 that further includes one or more processors, and memory resources represented by memory 1032, for storing instructions, such as applications, executable by processing component 1022. The application programs stored in memory 1032 may include one or more modules each corresponding to a set of instructions. Further, the processing component 1022 is configured to execute instructions to perform the methods described above.
The apparatus 1000 may also include a power component 1026 configured to perform power management of the apparatus 1000, a wired or wireless network interface 1050 configured to connect the apparatus 1000 to a network, and an input output (I/O) interface 1058. The device 1000 may operate based on an operating system stored in memory 1032, such as Windows Server, mac OS XTM, unixTM, linuxTM, freeBSDTM or the like
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. A fully-mechanized coal mining face coal wall caving trend and area analysis method is characterized by comprising the following steps:
the three-axis inclination angle sensor is installed at a target monitoring position on the hydraulic support, the angle data of the target monitoring position sent by the three-axis inclination angle sensor in the advancing direction of the working face is collected, and the target monitoring position comprises: the top beam, the shield beam and the base;
collecting first column pressure data of the hydraulic support in the direction of inclination of the working face and second column pressure data of the hydraulic support in the direction of propulsion of the working face;
determining the whole posture category of the hydraulic support according to the angle data of the target monitoring position in the advancing direction of the working face;
generating a working face integral hydraulic support column pressure distribution two-dimensional thermodynamic diagram according to the first column pressure data of the hydraulic support in the working face trend direction, wherein the working face integral hydraulic support column pressure distribution two-dimensional thermodynamic diagram takes a support number as a vertical axis and takes a sampling time point as a horizontal axis;
Acquiring a hydraulic support top beam resultant force action point change limit according to the angle data and the second upright post pressure data, and generating a working face integral hydraulic support top beam stress distribution two-dimensional thermodynamic diagram, wherein the working face integral hydraulic support top beam stress distribution two-dimensional thermodynamic diagram takes a support number as a vertical axis and takes a sampling time point as a horizontal axis;
and carrying out image identification processing on the two-dimensional thermodynamic diagram of the column pressure distribution of the integral hydraulic support of the working face and the two-dimensional thermodynamic diagram of the force distribution of the top beam of the integral hydraulic support of the working face to obtain a first ledge range marking image and a second ledge range marking image, and obtaining the early warning level of the ledge area of the coal wall of the working face according to the whole frame pose type of the hydraulic support.
2. The method of claim 1, wherein the step of collecting angular data of the target monitoring location in the direction of face advancement further comprises:
and carrying out interpolation processing on the angle data and the second upright post pressure data so as to ensure that the acquisition time of the angle data and the acquisition time of the second upright post pressure data are consistent, and the sampling interval time is consistent.
3. The method according to claim 1, wherein the step of determining the overall posture category of the hydraulic support according to the angle data of the target monitoring position in the direction of the working surface propulsion specifically comprises:
And acquiring a first angle between the top beam and the gravity vector, a second angle between the shield beam and the gravity vector, and a third angle between the base and the gravity vector in the angle data, wherein the whole frame pose category of the hydraulic support is determined according to the first angle, the second angle and the third angle, and the pose category comprises a risk pose and a risk-free pose.
4. A method according to claim 3, wherein the step of obtaining the hydraulic bracket header resultant force point of action change limit from the angle data and the second column pressure data comprises:
if the hydraulic support is a four-column hydraulic support, performing cluster analysis according to second column pressure data corresponding to front and rear columns in the hydraulic support to generate front and rear column pressure cluster diagrams, wherein the front and rear columns comprise: a front upright and a rear upright;
calculating the resultant force action point of the top beam in the hydraulic support at each acquisition time according to the angle data of the target monitoring position in the advancing direction of the working surface and the second upright post pressure data corresponding to the front upright post and the rear upright post;
and taking the connection position of the front upright post and the top beam as a lower boundary of a combined force action point, and taking the connection position of the rear upright post and the top beam as an upper boundary of the combined force action point.
5. The method of claim 4, wherein the step of obtaining the hydraulic bracket header resultant force point of application change limit from the angle data and the second column pressure data comprises:
if the hydraulic support is a two-column hydraulic support, calculating a combined force acting point of the top beam in the hydraulic support at each acquisition time according to angle data of the target monitoring position in the advancing direction of the working surface and second column pressure data corresponding to front and rear columns in the hydraulic support;
and taking the position of the connecting position of the upright post and the top beam, which moves forwards by a preset distance, as the lower boundary of the combined force action point, and taking the position of the connecting position of the upright post and the top beam, which moves backwards by a preset distance, as the upper boundary of the combined force action point.
6. The method according to claim 5, wherein the step of performing image recognition processing on the two-dimensional thermodynamic diagram of the pressure distribution of the upright column of the integral hydraulic support of the working face and the two-dimensional thermodynamic diagram of the stress distribution of the top beam of the integral hydraulic support of the working face specifically comprises:
carrying out gray-scale treatment on the upright post pressure distribution two-dimensional thermodynamic diagram of the integral hydraulic support of the working face to obtain an upright post pressure distribution diagram of the integral hydraulic support of the working face;
Carrying out gray-scale treatment on the two-dimensional thermodynamic diagram of the bearing distribution of the top beam of the integral hydraulic support of the working face to obtain a bearing distribution diagram of the top beam of the integral hydraulic support of the working face;
acquiring target characteristics corresponding to all hydraulic supports at each time point in a column pressure distribution diagram of the integral hydraulic support of the working face, and carrying out clustering processing according to the target characteristics to acquire a first data clustering sheet;
acquiring target characteristics corresponding to all hydraulic supports at each time point in a top beam pressure distribution diagram of the integral hydraulic support of the working face, and carrying out clustering processing according to the target characteristics to acquire a second data clustering sheet;
and identifying the outlines of the first data clustering slice and the second data clustering slice, and acquiring a first ledge range marked image and a second ledge range marked image according to the outlines.
7. The method of claim 6, wherein the step of obtaining the early warning level of the coal wall caving area of the working face according to the whole posture category of the hydraulic support comprises the following specific steps:
taking a hydraulic support which belongs to the first ledge range labeling image and the second ledge range labeling image in the working surface as a to-be-determined support, and acquiring the pose type of the to-be-determined support;
If the pose type of the to-be-determined support is a risk pose and the combined force acting point of the top beam in the to-be-determined hydraulic support is out of the upper limit range and the lower limit range of dynamic change of the combined force acting point, determining the early warning level as a first early warning level;
if the pose type of the to-be-determined support is risk-free pose, and the combined force acting point of the top beam in the to-be-determined hydraulic support is out of the upper limit range and the lower limit range of dynamic change of the combined force acting point, determining that the early warning level is a second early warning level;
if the pose type of the to-be-determined support is a risk pose and the combined force acting point of the top beam in the to-be-determined hydraulic support is within the upper and lower limit ranges of dynamic change of the combined force acting point, determining that the early warning level is a third early warning level;
and if the pose type of the to-be-determined support is risk-free pose, and the combined force acting point of the top beam in the to-be-determined hydraulic support is within the upper and lower limit ranges of dynamic change of the combined force acting point, determining that the early warning level is a fourth early warning level.
8. The utility model provides a combine face coal wall lamellas group trend and regional analysis device which characterized in that includes:
the angle detection module is used for installing a triaxial inclination sensor at a target monitoring position on the hydraulic support, acquiring angle data of the target monitoring position sent by the triaxial inclination sensor in the advancing direction of the working face, wherein the target monitoring position comprises: the top beam, the shield beam and the base;
The pressure acquisition module is used for acquiring first column pressure data of the hydraulic support in the direction of inclination of the working face and second column pressure data of the hydraulic support in the direction of propulsion of the working face;
the pose determining module is used for determining the pose type of the hydraulic support according to the angle data of the target monitoring position in the advancing direction of the working face;
the first thermodynamic diagram generation module is used for generating a working face integral hydraulic support column pressure distribution two-dimensional thermodynamic diagram according to the first column pressure data of the hydraulic support in the working face trend direction, wherein the working face integral hydraulic support column pressure distribution two-dimensional thermodynamic diagram takes a support number as a vertical axis and takes a sampling time point as a horizontal axis;
the second thermodynamic diagram generation module is used for acquiring the change limit of the hydraulic support top beam resultant force action point according to the angle data and the second upright post pressure data and generating a working face integral hydraulic support top beam stress distribution two-dimensional thermodynamic diagram, wherein the working face integral hydraulic support top beam stress distribution two-dimensional thermodynamic diagram takes a support number as a vertical axis and takes a sampling time point as a horizontal axis;
the early warning module is used for carrying out image recognition processing on the two-dimensional thermodynamic diagram of the upright post pressure distribution of the integral hydraulic support of the working face and the two-dimensional thermodynamic diagram of the top beam stress distribution of the integral hydraulic support of the working face so as to obtain a first ledge range marking image and a second ledge range marking image, and acquiring early warning levels of the ledge areas of the coal wall of the working face according to the whole posture category of the hydraulic support.
9. An electronic device, comprising:
a processor;
a memory for storing the processor-executable instructions;
wherein the processor is configured to execute the instructions to implement the method of any one of claims 1 to 7.
10. A computer readable storage medium, which when executed by a processor of an electronic device, causes the electronic device to perform the method of any of claims 1 to 7.
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| CN117146729A (en) * | 2023-10-31 | 2023-12-01 | 能科科技股份有限公司 | Servo press control system |
| CN117146729B (en) * | 2023-10-31 | 2024-02-20 | 能科科技股份有限公司 | Servo press control system |
| CN117420011A (en) * | 2023-12-18 | 2024-01-19 | 南京建正建设工程质量检测有限责任公司 | Concrete brick multipoint compressive strength detection system |
| CN117420011B (en) * | 2023-12-18 | 2024-03-15 | 南京建正建设工程质量检测有限责任公司 | Concrete brick multipoint compressive strength detection system |
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