CN107844607A - A kind of crustal stress display systems based on GIS - Google Patents
A kind of crustal stress display systems based on GIS Download PDFInfo
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Abstract
The present invention relates to a kind of crustal stress display systems and method based on GIS, wherein system includes：Data management module, for managing crustal stress data；The crustal stress data comprise at least geographical coordinate, the size and Orientation of maximum horizontal stress of monitoring point；Data inquiry module, for receiving crustal stress querying condition, and the crustal stress querying condition is sent to the data management module and inquired about, the crustal stress data that inquiry obtains are supplied to GIS-Geographic Information System module；GIS-Geographic Information System module is used on GIS-Geographic Information System map be shown the crustal stress data that the inquiry of the data inquiry module obtains accordingly；Wherein according to the geographical coordinate of monitoring point, correspondence position marks stress data icon on GIS-Geographic Information System map.The present invention in GIS map by marking stress data icon to allow user to get information about mining area crustal stress to show the crustal stress distribution situation in each mining area.
Description
Technical Field
The invention relates to the technical field of information, in particular to a GIS-based ground stress display system.
Background
Geostress is the natural stress present in the earth's crust without engineering disturbance, also known as initial stress, absolute stress or primary rock stress, and also broadly refers to the stress within the body of the earth. It includes stresses generated by geothermal heat, gravity, variations in the earth's rotational speed, and other factors.
The ground stress is the fundamental acting force causing deformation and destruction of mining, water conservancy and hydropower, civil construction, railways, highways, military affairs and other underground or open-air geotechnical excavation engineering, and is the necessary premise for determining the geotechnical attributes of the engineering, carrying out the stability analysis of surrounding rocks and realizing the excavation design and decision-making scientization of the geotechnical engineering. The ground stress state also has important significance for earthquake prediction, regional crust stability evaluation, stability of oil wells of oil fields, storage of nuclear waste, rock burst, research of coal and gas outburst, research of earth dynamics and the like.
However, current ground stress data acquisition approaches are limited and typically present the ground stress data in a particular location in a table format. Therefore, it is highly desirable to develop an information presentation system that is intuitive and facilitates users to view ground stress data.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a GIS-based ground stress display system aiming at the defect that ground stress data cannot be viewed visually in the prior art, and stress data icons are marked on a map of a geographic information system for visual display.
In order to solve the above technical problem, in a first aspect of the present invention, there is provided a Geographic Information System (GIS) -based ground stress display system, including:
the data management module is used for managing the ground stress data; the ground stress data at least comprises geographic coordinates of monitoring points and the size and the direction of the maximum horizontal stress;
the data query module is used for receiving the ground stress query conditions, sending the ground stress query conditions to the data management module for query, and providing the ground stress data obtained by query to the geographic information system module; and
the geographic information system module is used for correspondingly displaying the ground stress data obtained by the query of the data query module on a geographic information system map; the stress data icon is marked at a corresponding position on the geographic information system map according to the geographic coordinates of the monitoring point, the stress data icon comprises a line segment, the length of the line segment represents the maximum horizontal stress of the monitoring point, and the direction represents the direction of the maximum horizontal stress of the monitoring point.
In the GIS-based ground stress exhibition system according to the present invention, preferably, the ground stress data includes ground stress data of respective mines belonging to a plurality of mine areas; when the geographic information system module displays the stress data icons, determining the display upper limit of the monitoring points according to the magnification of the current map, detecting whether the number of the stress data icons of each mining area exceeds the display upper limit of the monitoring points, only displaying the stress data icons which are equal to the display upper limit of the monitoring points in the mining area when the number of the stress data icons of each mining area exceeds the display upper limit of the monitoring points, and displaying the stress data icons of all the monitoring points in the mining area when the number of the stress data icons does not exceed the display upper limit of the monitoring points.
In the geostress display system based on the GIS according to the present invention, preferably, when the number of the stress data icons of the detected mine area exceeds the upper limit of the display of the monitoring points, the geographic information system module selects the monitoring point data with the latest acquisition time from all the monitoring points of the mine area according to the chronological order of the acquisition time of the geostress data, and displays the monitoring point data in the map.
In the Geographic Information System (GIS) -based ground stress display system according to the present invention, preferably, the magnification scale of the map includes a first level to a seventh level, the geographic information system module acquires the level of the magnification scale of the current map, sets a monitoring point display upper limit according to the level of the magnification scale when detecting that the magnification scale of the current map is one of the first level to the sixth level, and displays the stress data icons of all monitoring points of the mining area when detecting that the magnification scale of the current map is the seventh level.
In the GIS-based ground stress display system according to the invention, preferably, the data management module is used for storing ground stress data of the mine area through the database in the form of a mine name table, a dictionary table and a ground stress data table of the mine area;
the mining area mine name table comprises: mine area name id, mine area name, mine name id, mine name and geographic coordinates;
the dictionary table includes: collecting mode id and collecting mode; the collection mode comprises stress relief and hydraulic fracturing;
the ground stress data table comprises the following monitoring points: the method comprises the following steps of associating mine area name id, associating mine name id, measuring point positions, measuring point depth, drilling depth, measuring point lithology, associating acquisition mode id, stress type and ground stress numerical value; the stress type includes a positive fracture type, a slip fracture layer, a reverse fracture layer, and/or uncertainty.
In the geostress display system based on GIS according to the present invention, preferably, the geostress display system based on GIS further includes a data import module, connected to the data management module, for acquiring the geostress data in an acquisition manner:
when the acquisition mode is judged to be hydraulic fracturing, the maximum horizontal stress magnitude, the minimum horizontal stress magnitude, the vertical stress magnitude and the maximum horizontal stress direction of the monitoring point are led into the ground stress data table; judging the stress type according to the maximum horizontal stress, the minimum horizontal stress and the vertical stress, and storing the data into the ground stress data table;
when the acquisition mode is stress relief, detecting whether ground stress data with the measuring point depth smaller than 100m exists or not, if yes, deleting, and otherwise, calculating the magnitude and direction of the maximum horizontal stress, the minimum horizontal stress and the vertical stress according to the magnitude and direction of the maximum principal stress, the middle principal stress and the minimum principal stress; and judging the stress type according to the calculated maximum horizontal stress, minimum horizontal stress and vertical stress, and storing the data into the ground stress data table.
In the geostress display system based on GIS according to the present invention, preferably, the geostress display system further comprises: the data downloading module is connected with the data query module and used for downloading the ground stress data obtained by query according to a downloading request of a user; the data downloading module acquires the magnification scale and the latitude and longitude range of the current map, generates a corresponding map picture according to the stored map data, marks the inquired ground stress data on the map picture in a stress data icon mode, and generates a complete picture to be provided for a user.
In the GIS-based ground stress display system according to the present invention, preferably, the GIS module acquires the magnitude N of the maximum horizontal stress of the current monitoring point when displaying the stress data icon m And determining the length L of the line segment of the stress data icon by the following formula T ：
Wherein the value range of a is 3.8-4.2.
In a second aspect of the present invention, a geostress display method based on a GIS is provided, which includes the following steps:
storing ground stress data, wherein the ground stress data at least comprises a geographical coordinate of a monitoring point, and the size and the direction of the maximum horizontal stress;
receiving a ground stress query condition, and querying in the ground stress data of the mining area according to the ground stress query condition;
correspondingly displaying the ground stress data obtained by inquiry on a geographic information system map; the stress data icon is marked at a corresponding position on a geographic information system map according to geographic coordinates of the monitoring point, the stress data icon comprises a line segment, the length of the line segment represents the maximum horizontal stress of the monitoring point, and the direction represents the direction of the maximum horizontal stress of the monitoring point.
In the GIS-based ground stress display method according to the present invention, preferably, the ground stress data includes ground stress data of each mine belonging to a plurality of mine areas; when the stress data icons are displayed, determining the display upper limit of the monitoring points according to the magnification ratio of the current map, detecting whether the number of the stress data icons of each mining area exceeds the display upper limit of the monitoring points, only displaying the stress data icons which are equal to the display upper limit number of the monitoring points in the mining area when the number of the stress data icons exceeds the display upper limit of the monitoring points, and displaying the stress data icons of all the monitoring points in the mining area when the number of the stress data icons does not exceed the display upper limit of the monitoring points.
The GIS-based ground stress display system and method have the following beneficial effects that:
1. according to the method, the stress data icons are marked on the GIS map to show the ground stress distribution condition of each mining area, so that on one hand, the ground stress position can be visually shown on the map, and on the other hand, the size and the direction of the maximum horizontal stress are shown by simple and clear diagrams, such as line segment lengths and directions, so that a user can visually know the ground stress of the mining area.
2. The invention also controls the number of monitoring points displayed in each mining area according to different map magnification ratios, thereby not only ensuring the display efficiency of the map in the browser when the stress data icons are superposed, but also ensuring the clearness and the identifiability of the stress data icons.
3. The method and the device have the advantages that the maximum horizontal stress is subjected to evolution processing, and a fixed coefficient a is multiplied, so that the display effect of the line segment length of the ground stress on a map is better, and the problem of large difference of ground stress data is solved.
4. When downloading the picture, the invention transmits the magnification scale, the maximum and the minimum longitude and latitude of the current map and the ground stress data to be displayed to the background, the background generates the map picture with high resolution according to the current magnification scale and the range, and marks the displayed ground stress data on the map again, and finally generates a complete picture for the user to download, thereby overcoming the problem that the resolution of the picture stored by the prior screenshot tool is lower.
Drawings
FIG. 1 is a block diagram of a GIS-based ground stress display system according to a first embodiment of the present invention;
FIG. 2 is an example of a map of a GIS based ground stress presentation system according to the present invention;
fig. 3 is an example of an interface of a GIS-based ground stress display system according to the present invention, wherein a displayed map is a partial screenshot of a chinese map;
FIG. 4 is an example second interface of a GIS based ground stress display system according to the present invention;
FIGS. 5a and 5b are map display effect diagrams of a GIS-based ground stress display system before and after filtering according to the present invention, respectively;
FIG. 6 is a block diagram of a GIS-based geostress display system according to a second embodiment of the invention;
FIG. 7 is a block diagram of a GIS based ground stress display system according to a third embodiment of the present invention;
fig. 8 is a flowchart of a geostress display method based on GIS according to a preferred embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Fig. 1 is a block diagram of a GIS-based ground stress display system according to a first embodiment of the present invention. As shown in fig. 1, the GIS-based ground stress display system provided by the first embodiment at least includes: a data management module 100, a data query module 200, and a geographic information system module 300.
The data management module 100 is used for managing the ground stress data. The ground stress data at least comprises the geographic coordinates of the monitoring points, the magnitude and the direction of the maximum horizontal stress sigma H. The geographic coordinates include the latitude and longitude of the monitoring points. The ground stress data used in the invention includes, but is not limited to, ground stress data of various mining areas, such as Chinese coal mine, including ground stress data collected at some monitoring points in mines of various mining areas.
The data query module 200 is connected to the data management module 100, and is configured to receive the ground stress query condition, send the ground stress query condition to the data management module 100 for querying, and provide the queried ground stress data to the geographic information system module 300.
The geographic information system module 300 is configured to correspondingly display the geostress data obtained by querying by the data querying module 200 on a geographic information system map. The geographic information system module 300 marks a stress data icon at a corresponding position on a Geographic Information System (GIS) map according to the geographic coordinates of the monitoring points in the geostress data. The geographic coordinates of the monitoring point are the longitude and latitude of the mine. The corresponding position of the geographic coordinate of the monitoring point on the geographic information system map can be a position completely consistent with the longitude and latitude of the mine, and can also be a region around the mine. For example, in some embodiments of the invention, the stress data icon may be marked on a map at a location that is substantially consistent with the longitude and latitude of the mine at which the monitoring point is located. Because there may be multiple monitoring points in the same mine, which may cause the stress data icons to overlap, in other preferred embodiments of the present invention, it is also possible to simulate that the ground stress is randomly distributed around the mine according to the longitude and latitude of the mine, and randomly mark the stress data icons of the monitoring points around the corresponding mine, and when the map is zoomed, the random position is fixed and unchanged.
The stress data icon at least comprises a line segment, wherein the length of the line segment represents the magnitude of the maximum horizontal stress sigma H of the monitoring point, and the direction represents the direction of the maximum horizontal stress sigma H of the monitoring point. Please refer to fig. 2, which is a map example of the GIS-based ground stress display system according to the present invention. As shown in FIG. 2, the invention combines the traditional ground stress data with a visual map through the spatial position, marks the ground stress data of the monitoring point on the GIS map in the way of line segment, the center of the line segment is the corresponding position point of the geographic coordinate of the current monitoring point on the map, the length of the line segment represents the magnitude of the maximum horizontal stress sigma H of the current monitoring point, and the direction represents the direction of the maximum horizontal stress sigma H of the current monitoring point. Taking a map of a Chinese mine area as an example, a geological map of a main mine area of China, basic maps of major cities, major counties and cities, major mountains, rivers and the like in the whole country can be displayed in a GIS map. Preferably, the stress data icon further comprises a solid circle, a hollow circle or a triangle at the center of the line segment for representing the acquisition mode of the ground stress data. For example, the acquisition pattern of hydraulic fracturing is represented by a triangle, and the acquisition pattern of stress relief is represented by a hollow circle.
In the present invention, the length of the line segment represents the magnitude of the maximum horizontal stress σ H at the current monitoring point, but the length of the line segment is not proportional to the magnitude of the maximum horizontal stress σ H. This is because the maximum horizontal stress σ H at different monitoring points has a large difference in value, and the difference is too large to be displayed on the map. In order to make the display effect better, the geographic information system module 300 of the present invention obtains the maximum horizontal stress magnitude N of the current monitoring point when displaying the stress data icon m And determining the length L of the line segment of the stress data icon by the following formula T ：
According to the invention, through a large number of experimental comparisons, the display effect is better when the value range of a is determined to be 3.8-4.2. More preferably, when the value of a is 4, the segment length can show the difference without influencing the display of the peripheral stress data icon. Therefore, the method and the device have the advantages that the size of the maximum horizontal stress is subjected to the evolution processing, and the maximum horizontal stress is multiplied by a fixed coefficient a, so that the line segment of the ground stress is better displayed on the map.
The invention adopts a Geographic Information System (GIS) to build a perfect geostress GIS map service engine, and provides stable and efficient GIS service for internet network application. The Geographic Information System (GIS) is a high-technology information system for inputting, storing, updating, inquiring, analyzing, applying, communicating and outputting various information according to spatial positions under the support of computer software and hardware, and is a sharable geographic database coded in various ways at the core. The invention realizes basic functions such as map browsing and the like through a GIS, and comprises the functions of map amplification, map reduction, map movement, national maps, rapid positioning of maps of all mine areas, map eagle eye and the like.
Please refer to fig. 3 and fig. 4, which are examples of interfaces of the GIS-based ground stress display system according to the present invention. As shown in the figure, the user terminal can access the geostress display system of the GIS of the present invention in the form of web page or software. The user can perform operations of zooming in, zooming out and moving the map. The user can also inquire the ground stress data through multiple conditions such as mining areas, mines, collection modes, measuring point depths and the like, and the inquiry result is displayed in the map.
1. Inquiring according to mining areas: a certain mine area name is input or selected to view the ground stress situation of the mine area.
2. Inquiring according to the mine, namely the specific mine name: a mine name is entered or selected to see the specific ground stress conditions of the mine.
3. And (3) inquiring according to the depth of the measuring point: and inquiring the crustal stress data in certain measuring point depth ranges.
4. Other conditions are as follows: and the query can be carried out according to conditions such as a data acquisition mode and the like.
The GIS-based ground stress display system shown in FIG. 3 is established based on the ground stress data of China coal mines, so that a China map is displayed by default, and when a user inputs or selects the names of a mining area and a mine from a selection column, and/or inputs a measurement method, and/or inputs information such as measuring point depth (buried depth in the map) and the like as a ground stress query condition. The data query module 200 receives the geostress query condition, sends the query condition to the data management module 100 for querying, and provides the queried geostress data to the geographic information system module 300 for displaying on a map. As shown in fig. 4, when "phoenix mountain coal mine" of "promoted mine area" is selected, the map is scaled to an appropriate level to display the geostress data for all of the monitoring points of the phoenix mountain coal mine. Preferably, the user can also view the ground stress condition of a certain area in detail by enlarging and reducing the map, and can click and view more detailed information aiming at specific ground stress monitoring points. For example, when a mouse is stopped or a user clicks the position of a certain monitoring point, the value of the specific ground stress data of the monitoring point is displayed.
In the process of displaying the ground stress data map layer, most of the stress data in the ground stress map layer are concentrated to monitoring points of a main mining area, the monitoring points are generally dense, and when the scaling level of a map is high, stress data icons are displayed unclear due to repeated overlapping. Therefore, the invention controls the number of the displayed monitoring points according to the magnification of the map.
In some preferred embodiments of the present invention, when the geographic information system module 300 displays the stress data icons, determining the upper limit of the display of the monitoring points according to the magnification ratio of the current map, and detecting whether the number of the stress data icons of each mine area exceeds the upper limit of the display of the monitoring points, if the number of the stress data icons exceeds the upper limit of the display of the monitoring points, only the stress data icons equal to the upper limit of the display of the monitoring points are displayed in the mine area, and if the number of the stress data icons does not exceed the upper limit of the display of the monitoring points, the stress data icons of all the monitoring points are displayed in the mine area. That is, the upper limit of the display of the monitoring point is set for each map of the magnification level, and the higher the magnification level, that is, the smaller the region in which the map is displayed, the larger the upper limit of the display of the monitoring point is set. When the data are displayed, the number of monitoring points needing to be displayed is determined according to the amplification ratio and/or the search condition, and then whether the number of the monitoring points of a mining area exceeds the display upper limit of the monitoring points is detected, if so, the exceeding number is not displayed. For example, if the upper limit of the display of the monitoring points set at the current magnification level is 6, the number of the monitoring points in each mining area does not exceed 6 during the display.
Preferably, when the number of the stress data icons of the detected mining area exceeds the upper limit of the display of the monitoring points, the geographic information system module 300 selects the monitoring point data with the latest acquisition time from all the monitoring points of the mining area according to the acquisition time sequence of the ground stress data, and displays the monitoring point data in the map. For example, when the display upper limit of the monitoring points set at the current magnification level is 6, and the number of the monitoring points of the mining area a to be displayed, which are obtained according to the query condition, is 8, the 6 monitoring point data with the latest acquisition time are selected to be displayed at the position of the mining area a during displaying.
More preferably, the magnification scale of the map in the present invention includes a first level to a seventh level, the geographic information system module 300 acquires the level of the magnification scale of the current map, sets the upper limit of the display of the monitoring points according to the level of the magnification scale when detecting that the magnification scale of the current map is one of the first level to the sixth level, and does not set the upper limit of the display of the monitoring points when detecting that the magnification scale of the current map is the seventh level, so that the map can display the stress data icons of all the monitoring points of the mine lot. For example, the map is enlarged in 7 steps, and the numerical values of the enlargement are 1 to 7, respectively. When the magnification ratio of the map is 1-6, the upper limit of the display of the monitoring points is set to be equal to the numerical value of the magnification ratio. E.g., on a 6-up scale, a maximum of 6 monitoring points are displayed in each mine. And when the magnification scale of the map is 7, not setting the upper limit of the display of the monitoring points, and displaying the stress data icons of all the monitoring points of all the mining areas which accord with the query condition. Please refer to fig. 5a and 5b, which are a map display effect diagram of the GIS-based ground stress display system before and after filtering according to the present invention. Wherein, the user can realize the two display effects by checking the option of 'whether to filter'. When the selection is not performed, the system displays all monitoring point data meeting the conditions, as shown in fig. 5a, the monitoring points are dense at certain mining areas, and the stress data icons are seriously overlapped, so that the length and the direction of the line segment cannot be identified. When checking, the system filters out part of data according to the display upper limit of the monitoring point corresponding to the current map magnification scale, as shown in fig. 5b, so that the stress data icon is clear and distinguishable.
Therefore, the invention not only ensures the display efficiency of the map in the browser when the stress data icons are superposed, but also can ensure the stress data icons to be clear and distinguished by adjusting the number of the displayed monitoring points.
Preferably, the data management module 100 is configured to store the geostress data of the mine area through the database in the form of a mine name table, a dictionary table, and a geostress data table. For example, the database may be mysql, the java part may be the springMVC + Mybatis framework, and the connection pool may be the draid. The ground stress data is mainly divided into three tables, namely a mining area mine name table, a dictionary table and a ground stress data table. The dictionary table mainly stores the acquisition mode of the geostress, and the field comprises an acquisition mode id and an acquisition mode. The collection means include, but are not limited to, stress relief and hydraulic fracturing. The mining area name table mainly stores mining area names, mine names and geographic coordinates of the ground stress, and the fields comprise mining area name id, mining area names, mine name id, mine names and geographic coordinates. The ground stress data table comprises the following monitoring points: the method comprises the following steps of associating mine area name id, associating mine name id, measuring point positions, measuring point depth, drilling depth, measuring point lithology, associating acquisition mode id, stress type and ground stress numerical value. Wherein the stress type includes a normal fracture type, a slip fault, a reverse fault, and/or an indeterminate type. Although the specific contents of the ground stress data are given in the embodiment, the invention is not limited thereto, and the ground stress data may also include other data, such as data acquisition time and the like.
Please refer to fig. 6, which is a block diagram of a GIS-based ground stress display system according to a second embodiment of the present invention. As shown in fig. 6, the GIS-based geostress exhibition system of the second embodiment is substantially the same as that of the first embodiment, except that a data import module 400 is further included, connected to the data management module 100, for importing geostress data into the data management module 100. The initial ground stress data includes: the method comprises the following steps of mine area name, mine name, geographic coordinates, collection mode, measuring point position, measuring point depth, drilling depth and measuring point lithology. The ground stress data also differs depending on the manner of acquisition.
(1) The geostress data measured as hydrofracturing also includes the maximum horizontal stress magnitude σ H, the minimum horizontal stress magnitude σ H, the vertical stress magnitude σ v, and the direction of the maximum horizontal stress σ H.
(2) The ground stress data measured in a stress relief mode further comprises the size and the orientation of the maximum principal stress sigma 1, the size and the orientation of the middle principal stress sigma 2 and the size and the orientation of the minimum principal stress sigma 3.
Data import is also divided into two types, namely, import of hydraulic fracturing and stress relief data. Accordingly, the data import module 400 first acquires the acquisition mode of the geostress data:
when the acquisition mode is judged to be hydraulic fracturing, the directions of the maximum horizontal stress sigma H, the minimum horizontal stress sigma H, the vertical stress sigma v and the maximum horizontal stress sigma H of the monitoring point are directly introduced into an earth stress data table to be used as earth stress numerical values. And determining the stress type by judging the relationship among the maximum horizontal stress sigma H, the minimum horizontal stress sigma H and the vertical stress sigma v according to the data of the 'hydraulic fracturing' acquisition mode. Preferably, different stress types can be identified in the map by stress data icons of different colors, as follows:
when σ v > σ H > σ H, the stress data icon is red, and the stress data icon is displayed as a positive fault;
when the sigma H is larger than the sigma v and larger than the sigma H, the 'slip fault' is displayed, and the stress data icon is green;
when the sigma H is larger than the sigma H and larger than the sigma v, the data is displayed as an inverse fault, and the stress data icon is blue;
when at least two of the three stress values are equal, an "indeterminate" is displayed and the stress data icon is black.
And when the acquisition mode is stress relief, detecting whether ground stress data with the depth of the measuring point being less than 100m exists, if so, deleting the data, otherwise, calculating the size and the direction of the maximum horizontal stress sigma H, the minimum horizontal stress sigma H and the vertical stress sigma v according to the stress rotating shaft formula according to the size and the direction of three principal stresses, namely the maximum principal stress sigma 1, the intermediate principal stress sigma 2 and the minimum principal stress sigma 3. Specifically, the inclination angle of the three principal stresses is determined to find out the vertical stress σ v (i.e., the inclination angle is greater than 60) of the three principal stresses, and the remaining two principal stresses are horizontal principal stresses (the largest horizontal stress σ H between the two principal stresses is the stress value larger, and the smallest stress value is σ H). The data import module 400 then determines the stress type according to the calculated maximum horizontal stress σ H, minimum horizontal stress σ H, and vertical stress σ v, with the same determination rule as the above-mentioned "hydraulic fracturing" collection method, and the data import module 400 then saves the data in the ground stress data table as the ground stress value.
Although the ground stress data may have a plurality of items, only the magnitude and direction of the maximum horizontal stress σ H is represented by a line segment of a stress data icon on the map.
Please refer to fig. 7, which is a block diagram of a GIS-based ground stress display system according to a third embodiment of the present invention. As shown in fig. 7, the GIS-based geostress display system of the third embodiment is substantially the same as the first embodiment, except that the system further includes a data downloading module 500 connected to the data query module 200 for downloading queried geostress data according to a download request of a user. In order to facilitate the use of the ground stress data by a user, the system provides the ground stress data and provides map downloading and data downloading functions, and the user can download map pictures containing the ground stress and can also download a ground stress data table. The data downloading mainly comprises the steps that a user inquires interesting data through various retrieval conditions and downloads Excel table data; the map downloading is to download the ground stress data in a specific range into a map picture according to a certain picture size.
At present, the GIS system can only capture the map of an inquiry result display window and then transmit the captured map to a user, the resolution of the captured maps is low, and particularly, when the user wants to magnify and view the ground stress data condition of a specific mining area, the displayed map is often not clear enough. Thus, another unique aspect of the present invention is: the data download module 500 obtains the magnification ratio and the latitude and longitude range (including the maximum latitude and longitude and the minimum latitude and longitude) of the current map, generates a corresponding map picture according to the stored map data, marks the inquired ground stress data on the map picture in the form of a stress data icon, and generates a complete picture to provide for a user. That is, when the user selects the option of 'picture download' in the window, the system transmits the magnification scale, the maximum and the minimum longitude and latitude of the current map and the ground stress data to be displayed to the background when the picture is stored, the background generates the map picture according to the current magnification scale and the range, the displayed ground stress data is marked on the map again, and finally, a complete picture is generated for the user to download.
The data download module 500 is further configured to provide the ground stress data in a tabular form. For example, when the user selects the option of "data download" in the window, the data download module 500 provides the ground stress data to the user in the form of an excel table. An example of ground stress data download is shown in table 1:
table 1
The GIS ground stress display system also has the functions of content information release and service data management. In the system, besides the query, display, download and the like of the ground stress of the core data, contents such as various industry research dynamic, latest scientific research, industry news, notification bulletins and the like can be regularly released, and the system provides a content release mechanism similar to CMS (content management system) and releases and displays the information. The system administrator or the relevant maintenance personnel can perform the following background management.
1. Background management and maintenance of ground stress data: and an authorized user can maintain the ground stress data through the introduction of the excel table or the data entry mode.
2. Background maintenance of map layer data: a map maintenance tool is provided, which can maintain the map published by the website.
3. Website content information background management and maintenance: the administrator can release various kinds of image-text information in the background of the system, the system provides an image-text editing interface with rich functions, for example, the font size, the color and the line spacing of articles can be set, pictures and tables can be inserted, and the articles in word documents and the formats can be directly pasted for maintenance.
Fig. 8 is a flowchart of a GIS-based ground stress displaying method according to a preferred embodiment of the invention. As shown in fig. 8, the method for displaying geostress based on GIS provided by this embodiment at least includes the following steps:
first, in step S801, ground stress data is saved, wherein the ground stress data includes at least geographic coordinates of monitoring points, the magnitude and direction of the maximum horizontal stress σ H. This step is consistent with the management manner of the data management module 100 for the ground stress data in the GIS-based ground stress display system, and is not described herein again.
Subsequently, in step S802, an inquiry condition of the geostress is received, and an inquiry is made in the geostress data of the mining area according to the inquiry condition. This step is consistent with the operation performed by the data query module 200 in the GIS-based ground stress display system, and is not described herein again.
Finally, in step S803, the searched geostress data is correspondingly displayed on a geographic information system map. The stress data icon is marked at a corresponding position on a geographic information system map according to the geographic coordinates of the monitoring point, the stress data icon comprises a line segment, the length of the line segment represents the size of the maximum horizontal stress sigma H of the current monitoring point, and the direction represents the direction of the maximum horizontal stress sigma H of the current monitoring point. This step is consistent with the operation performed by the GIS-based geoinformation system module 300 in the GIS-based ground stress display system.
Preferably, when the stress data icon is displayed, the magnitude N of the maximum horizontal stress of the current monitoring point is acquired m And determining the length L of the line segment of the stress data icon by the following formula T ：
Wherein, the value range of a is 3.8-4.2, and preferably a =4.
Preferably, the stress data icon further comprises a solid circle, a hollow circle or a triangle at the center of the line segment, and is used for representing the acquisition mode of the ground stress data. For example, the acquisition pattern of hydraulic fracturing is indicated by a triangle, and the acquisition pattern of stress relief is indicated by a hollow circle.
Preferably, when the stress data icons are displayed in step S803, the upper limit of the display of the monitoring points is determined according to the magnification of the current map, and it is detected whether the number of the stress data icons in each mine area exceeds the upper limit of the display of the monitoring points, if the number exceeds the upper limit of the display of the monitoring points, only the stress data icons equal to the upper limit of the display of the monitoring points are displayed in the mine area, and if the number does not exceed the upper limit of the display of the monitoring points, the stress data icons of all the monitoring points are displayed in the mine area.
Preferably, in step S803, when the number of the stress data icons in the detected mine area exceeds the upper display limit of the monitoring points, the monitoring point data with the latest acquisition time is selected from all the monitoring points in the mine area according to the acquisition time sequence of the ground stress data, and is displayed in the map. More preferably, the map magnification scale in the present invention includes a first level to a seventh level, the current map magnification scale level is obtained in step S803, when the current map magnification scale is detected to be one of the first level to the sixth level, the monitoring point display upper limit is set according to the current map magnification scale level, and when the current map magnification scale is detected to be the seventh level, the monitoring point display upper limit is not set, so that the map can display the stress data icons of all the monitoring points in the mine lot.
Preferably, the geostress display method based on the GIS further comprises a data downloading step, which is used for downloading the queried geostress data according to the downloading request of the user. In the data downloading step, the magnification scale and the latitude and longitude range (including the maximum latitude and the minimum latitude and longitude) of the current map are obtained when the map is downloaded, the corresponding map picture is generated according to the stored map data, the inquired ground stress data is marked on the map picture in the form of a stress data icon, and a complete picture is generated and provided for a user.
It should be noted that the principle and implementation of the method for displaying the geostress based on the GIS in the present invention are the same as those of the system, so that the detailed explanation of the embodiment of the system for displaying the geostress based on the GIS is also applicable to the system for displaying the geostress based on the GIS in the present invention.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. A GIS-based ground stress display system is characterized by comprising:
the data management module is used for managing the ground stress data; the ground stress data at least comprises geographic coordinates of monitoring points and the size and the direction of the maximum horizontal stress;
the data query module is used for receiving the ground stress query condition, sending the ground stress query condition to the data management module for query, and providing the ground stress data obtained by query to the geographic information system module; and
the geographic information system module is used for correspondingly displaying the ground stress data obtained by the query of the data query module on a geographic information system map; the stress data icon is marked at a corresponding position on a geographic information system map according to the geographic coordinate of the monitoring point, the stress data icon comprises a line segment, the length of the line segment represents the maximum horizontal stress of the monitoring point, and the direction represents the direction of the maximum horizontal stress of the monitoring point.
2. The GIS-based geostress presentation system of claim 1, wherein the geostress data comprises geostress data for individual mines belonging to a plurality of mine sites; when the geographic information system module displays the stress data icons, determining the display upper limit of the monitoring points according to the magnification of the current map, detecting whether the quantity of the stress data icons of each mining area exceeds the display upper limit of the monitoring points, only displaying the stress data icons which are equal to the display upper limit of the monitoring points in the mining area when the quantity of the stress data icons of each mining area exceeds the display upper limit of the monitoring points, and displaying the stress data icons of all the monitoring points in the mining area when the quantity of the stress data icons does not exceed the display upper limit of the monitoring points.
3. The GIS-based ground stress display system according to claim 2, wherein the geographic information system module selects monitoring point data with the latest acquisition time from all monitoring points of a mine according to the acquisition time sequence of ground stress data when the number of stress data icons detecting the mine exceeds the upper limit of the display of the monitoring points, and displays the monitoring point data in a map.
4. The GIS-based ground stress display system according to claim 2, wherein the magnification scale of the map includes a first level to a seventh level, the geographic information system module acquires the level of the magnification scale of the current map, sets a monitoring point display upper limit according to the level of the magnification scale when detecting that the magnification scale of the current map is one of the first level to the sixth level, and displays the stress data icons of all monitoring points of the mine area when detecting that the magnification scale of the current map is the seventh level.
5. The GIS-based ground stress display system according to any one of claims 1 to 4, wherein the data management module is used for storing ground stress data of a mine area through a database in the form of a mine name table, a dictionary table and a ground stress data table of the mine area;
the mining area mine name table comprises: mine area name id, mine area name, mine name id, mine name and geographic coordinates;
the dictionary table includes: collecting mode id and collecting mode; the collection mode comprises stress relief and hydraulic fracturing;
the ground stress data table comprises the following monitoring points: the method comprises the following steps of associating mine area name id, mine name id, measuring point positions, measuring point depth, drilling depth, measuring point lithology, an associated acquisition mode id, stress types and ground stress numerical values; the stress type includes a positive fracture type, a slip fault, a reverse fault, and/or an uncertainty.
6. The GIS-based ground stress display system according to claim 5, wherein the GIS-based ground stress display system further comprises a data import module connected to the data management module for acquiring the ground stress data in a manner of:
when the acquisition mode is judged to be hydraulic fracturing, introducing the maximum horizontal stress magnitude, the minimum horizontal stress magnitude, the vertical stress magnitude and the maximum horizontal stress direction of the monitoring point into the ground stress data table; judging the stress type according to the maximum horizontal stress, the minimum horizontal stress and the vertical stress, and storing data into the ground stress data table;
when the acquisition mode is stress relief, detecting whether ground stress data with the measuring point depth smaller than 100m exists, if yes, deleting, and otherwise, calculating the magnitude and direction of the maximum horizontal stress, the minimum horizontal stress and the vertical stress according to the magnitude and direction of the maximum main stress, the middle main stress and the minimum main stress; and judging the stress type according to the calculated maximum horizontal stress, minimum horizontal stress and vertical stress, and storing the data into the ground stress data table.
7. The GIS based ground stress exhibition system of any one of claims 1-4, wherein the ground stress exhibition system further comprises: the data downloading module is connected with the data query module and used for downloading the ground stress data obtained by query according to a downloading request of a user; the data downloading module acquires the magnification scale and the latitude and longitude range of the current map, generates a corresponding map picture according to the stored map data, marks the inquired ground stress data on the map picture in a stress data icon form, and generates a complete picture for a user.
8. The GIS-based ground stress display system according to any one of claims 1 to 4, wherein the geographic information system module obtains the magnitude N of the maximum horizontal stress of the current monitoring point when displaying the stress data icon m And determining the length L of the line segment of the stress data icon by the following formula T ：
Wherein the value range of a is 3.8-4.2.
9. A GIS-based ground stress display method is characterized by comprising the following steps:
storing ground stress data, wherein the ground stress data at least comprises geographic coordinates of monitoring points, and the magnitude and the direction of the maximum horizontal stress;
receiving a ground stress query condition, and querying in the ground stress data of the mining area according to the ground stress query condition;
correspondingly displaying the ground stress data obtained by query on a geographic information system map; the stress data icon is marked at a corresponding position on a geographic information system map according to the geographic coordinate of the monitoring point, the stress data icon comprises a line segment, the length of the line segment represents the maximum horizontal stress of the monitoring point, and the direction represents the direction of the maximum horizontal stress of the monitoring point.
10. The GIS-based geostress presentation method of claim 9, wherein the geostress data comprises geostress data of individual mines belonging to a plurality of mine sites; when the stress data icons are displayed, determining the display upper limit of the monitoring points according to the magnification of the current map, detecting whether the quantity of the stress data icons of each mining area exceeds the display upper limit of the monitoring points, only displaying the stress data icons which are equal to the quantity of the display upper limit of the monitoring points in the mining area when the quantity of the stress data icons exceeds the display upper limit of the monitoring points, and displaying the stress data icons of all the monitoring points in the mining area when the quantity of the stress data icons does not exceed the display upper limit of the monitoring points.
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