Method for predicting mine inflow based on dynamic change of permeability coefficient along with layered mining

A technology of permeability coefficient and dynamic change, applied in mining equipment, mining equipment, measurement, etc., can solve the problem of large difference in the predicted value of mine water inflow, and achieve the effect of improving the prediction accuracy

CN108915667AActive Publication Date: 2018-11-30XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-11-30

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Abstract

The invention relates to a method for predicting mine inflow and belongs to the field of mine mining, in particular to a method for predicting mine inflow based on a dynamic change of a permeability coefficient along with layered mining. The space of the mine excavation engineering is organically combined with the time distribution characteristics according to layered mining conditions, the influence of overburden failures on the permeability coefficient of an overlying aquifer caused by the mining is taken into consideration, the dynamic adjustment of the permeability coefficient matching with actual excavation activities in the research area is realized; a relationship between the permeability coefficient and the groundwater numerical model is built, the adjusted parameters can be imported into the simulation model in real time, the dynamic prediction of the water inflow along with coal mining is realized, and the prediction precision of the water inflow is improved.
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Description

technical field

[0001] The invention relates to a method for predicting mine water inflow, which belongs to the field of mine mining, in particular to a method for predicting mine water inflow based on the dynamic change of permeability coefficient with layered mining. Background technique

[0002] The design of mine drainage system needs to refer to the prediction results of mine water inflow, so the prediction technology of water inflow is one of the key technologies for mine water disaster prevention and control. At present, the mineable coal seam thickness of some coal mines is relatively thick, and the full height cannot be mined at one time. The method of layered mining is required. This coal mining method has multiple disturbances on the aquifer above the coal seam, resulting in the prediction of mine water inflow during the exploration stage. There is a large difference from the actual water inflow in the mine, and the actual water inflow also fluctuates greatly with...

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Embodiment Construction

[0027] The technical solutions of the present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

[0028] In order to improve the accuracy of mine water inflow prediction results and at the same time enable real-time prediction of water inflow while mining, the present invention provides a dynamic mine water inflow prediction method based on the evolution of permeability coefficient under layered mining conditions. The basic idea is Combined with the permeability evolution characteristics under the condition of layered mining, determine the change of permeability coefficient caused by mining between different layers and different working faces in the area, and make dynamic adjustments based on the mining progress, and combine the change of permeability coefficient into the actual mining progress , a method to finally calculate the water inflow by means of numerical simulation. This method has been ve...