Exercise 7 (3) Original Geological Catalogue of Exploration Trough

According to the trench length and geological complexity, the schematic scale is generally1:100 ~1:200.

I. Basic requirements

Generally, the mural of the groove is above the sketch, and the picture of the groove bottom is below the sketch. The distance between the bottom of the tank and the tank wall should be greater than 1cm (to indicate the occurrence and sample number, etc. ). The bottom of the tank is drawn into a rectangle with the same width according to the orthogonal projection, and its width is generally 1 ~ 1.5 cm. In case of special circumstances, when another tank wall needs to be painted, it should be painted below the tank bottom.

When drawing, we should sketch according to the characteristics of the basic body (such as lenticular, wavy, branched, etc.). ) keep the shape of geological body in the schematic diagram consistent with reality.

In general, the geological body with a reduced width greater than 1mm should be sketched. Although small ore bodies or geological phenomena with special significance are less than 1mm, they should be enlarged. The method is to draw the map from this point and make an enlarged sketch.

When making a trench wall map with a large slope, the trench wall map can be vertically moved up and down in sections to form a zigzag shape (the trench bottom map is still continuous), but it should be noted that the geological elements between sections should be strictly consistent (Figure 7-25).

Figure 7-25 Schematic Diagram of Moving Tank Wall Up and Down

Second, the basic steps of drawing

(1) The draftsman should draw for the catalog wall and arrange the drawing elements reasonably. Prepare the grid paper first, and then determine the corresponding positions of the map name, scale, baseline starting point, groove wall, groove bottom, responsibility table and sample analysis result table on the coordinate paper according to the height difference of the exploration groove. In principle, the layout should be reasonable, neat and beautiful, and the unified legend of the mining area should be used.

(2) Drawing base points and baselines. Starting from the first baseline numbered 0 determined on the map (draw a circle with a diameter of 2mm at the base point and add some points at the center of the circle, the same below), draw the baseline on the coordinate paper with the measured slope angle and determine the length of the baseline on the map according to the scale, and the end point of the baseline is base point 1.

(3) Manually measure the coordinates of each geological element point. Manually measure and report the coordinate position of each geological feature point relative to the baseline.

(4) Schematic diagram of tank wall. The starting point reading of each wire is 0m, and the position of each point vertically projected on the baseline is X meters, that is, the reading on the tape measure, and the vertical distance from this point to the baseline is Y meters (on the baseline or under the baseline, the datum is measured), so the draftsman can project the positions of each point on the map accordingly and connect them into a map by classification (Figure 7-26). The point of vertical projection of surface point A on the conductor is a', and a' is on the tape measure. The vertical distance a- a' from point A to the conductor is 1. 9m (pronounced 1. 9m on the base), then the x coordinate of point A = 5. 5m, y coordinate = 1. 9m on the base. Based on this, the position of point A can be determined on the map, and then the position of point B on the surface can be determined in turn. In this way, points O, A and B are connected in turn, that is, topographic lines (surface lines).

Figure 7-26 Schematic Diagram of Groove Wall Projection

Connecting points C, D and E to form bedrock line; Connect points F, G and J as the bottom line of the groove; Connecting point K and point I as the top boundary of ore body; Connecting point n and point m is the bottom boundary of the ore body.

(5) Schematic diagram of tank bottom. Surveyors will first project each cataloged element point on the tank bottom to the junction of the tank bottom and the tank wall according to the geological trend, and then vertically project it to the baseline, and report a reading point (X coordinate) of this point on the baseline. Draughtsman can project this point from the baseline to the tank bottom map to draw geological bodies, samples, etc. (Because the tank bottom is flat, there is no Y coordinate point). The projection points of control points A and B of the fracture zone and control points C, D, E and F of the sample tank on the baseline are A', B', C', D', E' and F' respectively. According to their readings on the wires, project them back to the bottom of the water tank, and then draw a sketch according to the trend (Figure 7- 27).

Figure 7-27 Schematic Diagram of Tank Bottom Projection

(6) The position of the measured occurrence, collected specimens and block samples shall be marked with symbols on the map (the method is the same as above).

Third, the internship materials and requirements

(1) TC0 1 original geological record of a mining area (Table 7-5);

(2) According to the information recorded in Table 7-5, sketch the pipe trench by hand;

(3) According to the information recorded in Table 7-5, use the MEMapGIS digital engineering cataloging software system, a field data acquisition system for mineral resources survey, to draw a schematic diagram of the trench.

Fourth, the steps of digital geological logging of exploratory trench

1. New mining project

(1) Organize mining projects by administrative region. ① First, open the desktop system of solid minerals, and click and select the mining area map in the menu; (2) Select the name of the province (Figure 7-28); ③ Take Yunnan Province as an example. Click to select Yunnan Province, and the "New Mining Project Dialog Box" will pop up. Click New. ④ Enter data in the pop-up basic information table of mining area, in which "Mining Area Code" is a required field (Figure 7-29); ⑤ Select the mining area project and click OK; ⑥ Then select the background layer file directory and click OK; ⑦ After adding a new mining project, right-click in the left list view and select Add Project (Figure 7-30). ⑧ Add background layer file.

Table 7-5 TC0 1 Directory Record Table

Figure 7-28 Mining Area Project Organization by Administrative Region

Table 7-29 Basic Information Table of Mining Area

Figure 7-30 Add background layer file

(2) Organize mining projects according to the international framework. (1) First, open the desktop system of solid minerals, and click the "Select Working Mining Area" drop-down menu in the menu (Figure 7-3 1). (2) Select the map name (Figure 7-32); (3) Select the geographical base map and related maps of this map sheet, and require these maps to be projected in Gauss meters; ④ If it is a new map, the dialog box "Sheet×× does not exist, do you want to create it?" Will pop up, press y; ⑤ Add a background layer, right-click in the layer management area, select Add Project, and then press the Open button (Figure 7- 33).

Figure 7-3 1 Organizing Mining Area Map with Standard Framework

Figure 7-32 Selecting a Background Image

Figure 7-33 Adding a Background Layer

2. Obtain the basic information data of the ditch.

(1) Select "Exploring Trough" under "Indoor Engineering Attribute Data Entry (New)" from the drop-down menu of engineering operation and regional sampling in the desktop menu;

(2) The system will automatically select the exploratory trench layer, and the "Add to exploratory trench layer" dialog box will pop up at the same time, and press y;

(3) On the screen, click the location of the project with the mouse, that is, the fixed point. After pressing the left key, a dialog box will automatically pop up on the screen, and the basic information of the gutter will be entered (Figure 7-34).

Figure 7-34 Basic information entry table of exploratory trench

Description of important parameters: Item number-required item, consisting of numbers and letters, used as the directory; Explore line number-consists of numbers and letters and is used as a table of contents. If the exploration line number is not given; all projects will be automatically placed of the ENGPOOL directory. Scale-required; You must enter the bottom width of the trough.

(4) After confirmation, the system will automatically mark the location and engineering number of the exploratory trench on the drawing (Figure 7-35).

Figure 7-35 Project Desktop Information

3. Obtain trench measurement data

(1) Open the common interface for data entry of exploratory trench. (1) In the desktop menu, select the exploration tank under editing and browsing of engineering database from the drop-down menu of engineering operation and regional sampling; (2) First, select the engineering drawing to edit. For the newly recorded engineering data, the following dialog box will pop up for the first time. You must press y, and the system will create a directory with a search number to store all the files of the project (if it is a new search number, the dialog box "Search directory does not exist, do you want to create it?" It will pop up, you must press Y, and the system will create a directory with the number of the exploration line to store all the files under the exploration line; If the exploration line number is not given, all projects will create a directory with the project number under the ENGPOOL directory); (3) The general dialog box for trench logging data pops up (Figure 7-36).

Figure 7-36 General dialog box for geological data entry of exploratory trench

The data entry sequence must follow the following basic principles: ① The traverse database must be entered first; ② After the traverse data is entered, you can enter the outline database and hierarchical database; (3) Other data can only be input if there is data in the traverse library and the hierarchical library. This is because sampling, sketching, generating and grooving must be carried out under a certain number of lines and a certain number of layers.

(2) The way of the origin of the groove diagram and the consistency between the groove coordinate system and the numerical value. Depending on the direction of the trench and the side facing the wall, the starting point of drawing is usually from left to right or from right to left. Based on the wire: the x value is the reading of the wire; The vertical reading of the Y value above the conductor is positive, and the vertical reading of the Y value below the conductor is negative (Figure 7-37).

Figure 7-37 Ditch Coordinate System and Value Convention

(3) Data input of trench conductor. ① The default data entry dialog box starts with "Traverse Library". You can directly click Add to enter the dialog box (Figure 7-38) and enter the wire information. The wire number is entered in the form of 0- 1. Due to the outcrop, the left wall and the right wall can be cataloged. The system requires that each traverse can only catalog one wall. If you want to change from the left wall to the right wall, you can change the conductor (left wall: people face the conductor). Right wall: people face the right end of the conductor direction, and the wall in the right end direction is below the figure (below). (2) After the traverse data is entered, press OK, and the data will be automatically imported into the list box for easy browsing; ③ If you want to continue inputting data, just repeat steps ① and ②. (4) View the graph, and click the sketch button to view it. The data just entered has been drawn on the graph.

Figure 7-38 Slot Line Input Dialog Box

(4) Collecting the measurement data of the trench wall contour. (1) Select the current line number, click the outline library button, and the prompt bar at the top of the dialog box will explain that the current database is an outline library, and then press the Add button to enter the dialog box (Figure 7-39); (2) After data entry, press OK, and the data will be automatically imported into the list box for easy browsing; (3) To continue inputting data, repeat steps (1) and (2); (4) To view the graph, press the sketch button to view it.

Figure 7-39 Profile Library Dialog Box

(5) layered data acquisition of exploratory trench. (1) First select the current line number, press the hierarchical library button, and then press the Add button to enter the hierarchical data input dialog box (Figure 7-40); (2) Enter classified data and press OK, and the data will be automatically imported into the list box for easy browsing. (3) To continue inputting data, repeat steps (1) and (2); (4) To view the graph, press the sketch button.

Figure 7-40 Exploration Slot Layered Data Input Dialog Box

(6) Collecting trench sampling data. (1) First select the current sampling line number and layer number, and then press the sampling library button. The prompt bar at the top of the dialog box will prompt that the current database is a sampling library, and then press the Add button to enter the sampling entry dialog box (Figure 7-41); (2) After data entry, press OK, and the data will be automatically imported into the list box for easy browsing; (3) To continue inputting data, repeat steps (1) and (2); (4) To view the graph, press the sketch button.

Figure 7-4 1 sampling position input dialog box

(7) Obtain the sampling data of trenching and slotting. (1) First, select the current sampling line number and layer number, and the prompt bar at the top of the dialog box will explain that the current database is a slotted sampling library, and then press the Add button to enter the dialog box (Figure 7-42); (2) After data entry, press OK, and the data will be automatically imported into the list box for easy browsing; (3) To continue inputting data, repeat steps (1) and (2); (4) To view the graph, press the sketch button.

Figure 7-42 Gap Sampling Input Dialog Box

(8) The steps and principles of data acquisition of pipe trench occurrence and pipe trench photos are the same as sampling.

(9) Drawing and editing of trench engineering drawings. Whenever the user inputs a new set of compiled data, press the sketch button to see how the new catalog data is drawn on the map.

(10) output of engineering geological catalogue of exploration trough. (1) Select print item in menu sample management, and the item browsing dialog box will appear; (2) The system opens the pit exploration project by default, and the user can switch the project type by clicking the button on the right, and then click the Print button to print the selected project.