Improved coal seam floor water inrush vulnerability evaluation method

Abstract

A method for evaluating water inrush weakness of a coal seam floor comprises the following steps: collecting geological data of a to-be-evaluated target area to determine main control factors; quantizing the related data for the main control factors, to form a thematic map for each main control factor; uniformizing the property data corresponding to the thematic maps, and eliminating the impact of the dimension factor of the property data, to form a uniformized thematic map corresponding to each main control factor; establishing, by using the GIS, a database for storing the uniformized property data corresponding to the uniformized thematic maps; determining weight of each main control factor based on a constant weight module; determining variable weight of the main control factors based on separated variable weight modules; compositing and superposing the uniformized thematic maps corresponding to each single main control factor, to establish a topology relationship between the related data in the property database, for fitting analysis of the multiple factors; and establishing a weakness evaluation module based on the separated variable weight modules to evaluate the weakness of the coal seam floor. The data processing and evaluation process combining the separated variable weight modules and the constant weight module achieves high evaluation precision.

Description

technical field [0001] The invention relates to a method for evaluating the water inrush vulnerability of the coal seam floor, in particular to an improved water inrush vulnerability evaluation method for the coal seam floor based on a partition variable weight model. Background technique [0002] For a long time, coal has been one of the main energy sources in our country. Safe, efficient and green coal mining is a major issue related to the development of the national economy and society. However, the geological and hydrogeological conditions of coal mines in my country are generally very complex. The coal reserves threatened by water damage account for about 27% of the proven reserves, and the coal reserves threatened by floor confined water in North China are about 16 billion tons. In addition, at present, many mines have entered into deep mining, and the coal mining elevation of some mines has reached -600m, and the deepest one has exceeded -1000m. The water pressure o...

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Problems solved by technology

[0007] However, the vulnerability index method of the existing technology has the following defects: the determination of the "weight" of each main control factor adopts the information fusion method. Once the "weight" is determined, no matter what the index value of the main control factor is The weight value is fixed in the whole research area, that is, the evaluation method of the vulnerability index of coal seam floor water inrush in the prior art is a "constant weight" based on the information fusion method Model

This "constant weight" floor water inrush vulnerability evaluation model based on the information fusion method cannot describe the control and impact of each single main control factor on the coal seam floor water inrush caused by the sudden change in the index value caused by the change of hydrogeological conditions in the study area. The impact characteristics cannot reveal the "incentive" and "punishment" mechanism of each main control factor in the study area due to the sudden change of index value on the control and influence of coal seam floor water inrush, and it cannot reflect the multiple combination of multiple main control factors. Their relative importance and preference in changing state and their control and influence on coal seam floor water inrush

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