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A Method for Determining the State of Coal Seam by Water Body Variation Curve

A technology of changing curves and water bodies, applied in the field of coal geological exploration, can solve the problems of not taking into account the tectonic event interface on the region, not taking detailed consideration, etc., to achieve the effects of convenient operation, accurate recovery and analysis, and simple process

Active Publication Date: 2019-04-02
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, Tasch divided coal rock types and rock formations into six simple types according to their formation water depth from shallow to deep: silk coal, vitrinite, bright coal, dark coal, carbonaceous peat, and mudstone. Water depth, combined with structural subsidence and other ideas to draw the water body curve formed by the coal seam, the coal seam formation curve method proposed by Tasch is only suitable for single-layer coal or coal seams containing thin mudstone, but for multi-layer coal or coal seams containing multiple types of gangue (such as limestone , sandstone, mud shale, etc.) coal seam water body change curve was not considered in detail; at the same time, when Tasch considered the coal seam formation curve drawing, he believed that the coal seam formation was a continuous water body change process, and did not take into account the formation of regional tectonic processes. However, in the actual geological work, it is often found that there are geological events in the coal seam. These events may cause a variety of gangue in the coal or a sudden change in the composition of the coal rock. Therefore, the formation curve of this type of coal seam needs to be further proposed. to draw

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  • A Method for Determining the State of Coal Seam by Water Body Variation Curve
  • A Method for Determining the State of Coal Seam by Water Body Variation Curve
  • A Method for Determining the State of Coal Seam by Water Body Variation Curve

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Embodiment 1

[0024] The concrete steps of drawing coal seam formation water body change curve of the present embodiment are:

[0025] (1) Identification of macroscopic coal rock composition and gangue lithology, visual observation of coal rock composition and gangue lithology in underground or boreholes, to determine the macroscopic coal rock composition type from bottom to top in the same coal seam or gangue types, measure and record the layered thickness of different components at the same time;

[0026] (2) Number different macroscopic coal rock components or gangue lithology, form different coal rock types and gangue lithology characteristics according to different water depths, start numbering from the components formed in shallow water, and form in deeper water bodies According to the types of gangue that often appear in coal and the coal geological foundation, 10 kinds of rock or coal rock component numbers are determined, and the numbers 1-10 represent clay rocks respectively. Or ...

Embodiment 2

[0040] In this embodiment, the water body change curve is drawn for the main mining coal seam and its gangue and roof rock section in a certain mining area, and the specific process is as follows:

[0041] (1) Identify and divide the coal seam and the coal rock type and rock strata that are included in the roof and floor according to the underground or drilled rock strata. A total of 19 layers are divided, and the vertical thickness is measured and recorded. The results are shown in Table 3;

[0042] (2) According to the method in Table 2, number the different types of coal rock types (Table 3), on this basis, according to figure 2 Draw the principle, combine the actual stratum thickness and the required scale to draw the base map of the coal formation curve, and draw vertical equidistant parallel lines along the abscissa in 10 types;

[0043] Table 2: Corresponding numbers of different coal rock components or rocks

[0044] Claystone (or Paleosol)

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Abstract

The invention belongs to the technical field of coal geological exploration, and relates to a method for drawing water body change curves formed by coal seams. Firstly, different macroscopic coal rock components or lithology of gangue inclusions are numbered, and then the scale for drawing water body change curves formed by coal seams is determined. The stratum section or columnar section of the coal seam is drawn from the bottom to the top according to the thickness of the layered statistics; then the water body change curve formed by the coal seam is drawn, and the abrupt change points are found and marked according to the characteristics of the water body curve formed by the coal seam, and combined with the water body change process of the coal seam formation, the coal seam formation environment Describe and explain; its process is simple and easy to operate, which enriches the ideas and methods for drawing water body change analysis curves when multi-layer coal or coal seams containing various types of gangue are formed, and can more accurately restore and analyze the deposition of various coal seams surroundings.

Description

Technical field: [0001] The invention belongs to the technical field of coal geological exploration, and relates to a method for measuring the state of a coal seam with a water body change curve, in particular to a method for recovering the water body change curve in a swamp when the coal seam (primitive peat) is accumulated. Background technique: [0002] The research on coal formation theory has a long history, mainly including water entering into coal or water retreating into coal. No matter whether water enters into coal or water retreats into coal, the water body in the peat swamp (coal forming environment) is not fixed during the development process. The vertical change of the coal seam also reflects the water body change of the coal-forming environment (peat swamp). Coal is macroscopically divided into four coal-rock components, which represent different stages of peat swamp depositional environment, which also shows that some changes may occur in the water body durin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 吕大炜刘海燕王东东李增学王绪冰赵鲁阳勇鹏林杨庆
Owner SHANDONG UNIV OF SCI & TECH
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