1 concept and characteristics of mine map

Mine map is a general term to reflect mine underground mining engineering and geological conditions of coal mining activities in production and construction map. The mine map is the most important technical data in coal mining enterprises. It is an essential map for managing mining enterprises and guiding production. It is for the correct mining design, preparation of mining plans, guiding roadway excavation and reasonable arrangement of mining work and Engineering needs have an important role.

Compared with other drawings, the mine map has the following characteristics:

(1) The content of the mine map shall be gradually increased, supplemented and modified as the mining project progresses;

(2) The mapping area of ​​the mine map is determined by the distribution of the ore layer and the deployment of the roadway, and is often divided into horizontal mapping;

(3) The mine map reflects the complex spatial relationship of the underground tunnel, as well as the ore body and surrounding rock occurrence and various geological damages. There are many surveying and mapping contents, and it is difficult to read the map;

(4) Using the methods of actual measurement and editing, based on the measured data, supplemented by technical data such as geology, hydrology and mining.

2 classification of mine map

The basic mine maps necessary for the production of mines include two categories: one is the mine survey map, which is based on the actual situation of the ground and the downhole; the other is the mine geological map, which is based on the mine geological exploration data and mining. Drawn by the geological information revealed in the process. There is a close relationship between the two types of mine maps. The mine survey map is the basis for drawing the mine geological map; the geological information on the mine survey map is derived from the reliable mine geological map. This chapter mainly introduces the mine measurement map.

According to the projection method and the projection surface, the mine map can be divided into a plane projection image, a vertical surface projection image, a sectional image, and a stereoscopic image. According to the mapping method, it is divided into two types: original image and duplicate image. The original image is directly based on the measured, adjusted or collected data on the polyester film or the mine map on the original drawing. Under normal circumstances, the original image should not be used directly for printing or use. The copy of the original image is called the second base map. A mine map copied or compiled from the original map or the second base map is called a duplicate map. The main drawings that must be possessed during the production and construction of coal mines are called basic mine maps. The basic mine maps specified in the “Measures for Coal Mine Measurements” are shown in Table 1-1.

Table 1-1 Basic mine maps that mines must have

3 Grid framing and numbering

The coal mine measurement map uses a square framing method or a free framing method. The square framing and its numbering method are the same as the large scale topographic map, and will not be described here.

For various mine maps that reflect underground mining projects, the free-framing method is generally used to divide the maps. Generally, no uniform numbering is performed, and the map name is added to the map. When freely framing, the size of the web and the direction of the grid are considered according to the following principles:

(1) Facilitate the use and preservation of drawings;

(2) The size of the web depends on the extent of the mine field and the mining area. In the same mine, the size of the map should be as similar as possible;

(3) The coordinate grid line can be parallel to the direction of the edge of the image, or it can be oblique to the edge of the figure.

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