A method for judging the risk degree of water inrush from deep well floor

Abstract

The invention discloses a method for judging the risk degree of water inrush from the floor of a deep well, belonging to the field of mine safety analysis. It first collects multiple main controlling factors that affect floor water inrush, then selects the evaluation index according to the weight of the main controlling factors, determines the membership function of the evaluation index, and then combines the actual mine water inrush situation, selects the case with obvious floor risk, and analyzes The sample data is normalized, the MATLAB program is used to classify the cases, and the case database of the water inrush risk degree of the floor is constructed; finally, the evaluation index data of the risk degree of the floor to be tested is input to determine the water inrush risk level of the floor to be tested. The method of the invention can evaluate multiple main control factors, and provides technical support for improving the safety of deep well mining.

Description

technical field [0001] The invention belongs to the field of mine safety analysis, and in particular relates to a method for discriminating the risk degree of water inrush on the floor of a deep well. Background technique [0002] Water inrush from the coal seam floor is a relatively complicated process, which is a rock mass instability phenomenon caused by human excavation engineering activities leading to the release of energy in the stress field of the surrounding rock mass of the coal seam, the destruction of the water-resistant rock mass of the coal seam floor, and the sudden change of the local water-filled hydrogeological conditions of the mine. . At present, the safety evaluation methods for water inrush risk degree of deep well floor generally evaluate the risk degree of water inrush from the aspects of mathematical statistics, hydraulics, fuzzy mathematics, gray theory, neural network, etc., but these methods are immature, and most of them use a single It is mainl...

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Problems solved by technology

[0004] (1) The theory of "lower three zones" and "lower four zones" under mining conditions are consistent with the actual situation of mine floor aquifer damage. However, due to the high cost of on-site measurement, complicated operating procedures, Difficult and therefore not widely used in the field

[0005] (2) "Water inrush coefficient method" has always been a method for evaluating water inrush from the coal seam floor in my country because of its simple physical concept and convenient calculation. However, this method only considers the two influencing factors of the water pressure of the aquifer and the total thickness of the floor aquitard , which fails to reflect the non-linear dynamic phenomenon that the coal seam floor water inrush is controlled by multiple factors and has a very complex mechanism

[0006] The coal seam floor water inrush evaluation methods based on fuzzy mathematics, gray relational degree, neural network and other theories or cross-theories are mostly based on a single operation, and there is no floor water inrush risk case library, and the existing water inrush cases cannot be combined. use, waste of resources

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