Novel practical method frangibility index method for evaluating seam floor water inrush

Abstract

The invention relates to a frangibility index method for evaluating seam floor water inrush, which comprises the following steps: determining main control factors of the seam floor water inrush by taking GIS as an operating platform based on a multi-source information fusion theory, and establishing a sub-subject layer diagram for each main control factor through data acquisition, analysis and processing; determining the 'contribution' or the 'weight' of each main control factor to a complex water inrush process and establishing a forecast evaluation model for the seam floor water inrush through the inversion identification or the learning training of the model by applying a multi-source geoscience data composite superposition principle and adopting a modern linear or non-linear mathematical method; and reasonably determining a subarea threshold value of the water inrush frangibility according to the analysis of a frequency histogram of water inrush frangibility indexes calculated by each unit in a research area and finally making a scientific division and a forecast evaluation on the seam floor water inrush frangibility. The method well overcomes the difficulty of the forecast evaluation on the seam floor water inrush, breaks through the restriction by significant deficiencies that the conventional water inrush coefficient method for the seam floor water inrush evaluation can only consider two control factors and has no influence 'weight' concept and the like, and adopts the GIS and the modern non-linear mathematical coupling method to truly depict the non-linear dynamic process of the seam floor water inrush which is controlled by a plurality of factors and has a very complicated formation mechanism.

Description

Technical field [0001] The invention relates to a method for evaluating and predicting water inrush from a coal seam floor in a coal mine, in particular to a new practical method of "vulnerability index" for evaluating and predicting water inrush from a coal seam floor. Background technique [0002] Coal seam floor water inrush is a kind of underground rock mass instability phenomenon caused by artificial mining engineering activities, which lead 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 structure of the coal seam floor, and the sudden change of the local water-filled hydrogeological conditions of the mine. It is a nonlinear dynamic phenomenon controlled by multiple factors and has a very complex formation mechanism. Since modern mathematics has not been able to use a deterministic mathematical equation to describe this nonlinear dynamic phenomenon with complex mechanism and ma...

AI Technical Summary

Problems solved by technology

However, this detailed and systematic analysis to determine the main controlling factors controlling coal seam floor water inrush, and the correct establishment of a physical conceptual model of coal seam floor water inrush are only the first step in solving the difficult problem of prediction and evaluation of floor water inrush.

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