Dynamic prediction method for water inflow of coal mine working face under mining disturbance condition

A technology of dynamic prediction and disturbance conditions, which is applied to mining equipment, mining equipment, earthwork drilling and mining, etc., to achieve the effect of dynamic prediction

Inactive Publication Date: 2020-11-13
NANJING UNIV
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Problems solved by technology

[0004] However, the existing numerical models of groundwater flow are mainly constructed based on the MODFLOW program. In the model setting, it is assumed that the hydrogeological parameters dominated by the permeability coefficient will not change during the simulation period. The fact that performance has a dynamic impact does not match

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  • Dynamic prediction method for water inflow of coal mine working face under mining disturbance condition
  • Dynamic prediction method for water inflow of coal mine working face under mining disturbance condition
  • Dynamic prediction method for water inflow of coal mine working face under mining disturbance condition

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[0031] The present invention will be further described in detail below in combination with specific implementation methods and accompanying drawings.

[0032] Such as figure 1 Shown, the dynamic prediction method of coal mine working face water inflow of the present invention comprises the following steps:

[0033] (1) Establish a groundwater flow model in the mining area in a natural state, including:

[0034] (1.1) Determine the model range and boundary conditions of the groundwater flow model in the mining area by analyzing the hydrogeological and meteorological data in the research area; determine the atmospheric rainfall infiltration recharge coefficient through hydrological and groundwater monitoring network observations, pumping tests, and geophysical prospecting techniques, etc. Evaporative discharge coefficient, permeability coefficient partition, etc.;

[0035] (1.2) Determine the spatial distribution and water-rich zones of aquifers and aquitards, build a three-di...

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Abstract

The invention discloses a dynamic prediction method for the water inflow of a coal mine working face under the mining disturbance condition. The dynamic prediction method comprises the following stepsof (1) establishing a mine lot underground water flow numerical model in a natural state; (2) determining the rule of influence of different stages of coal mining to the working face on hydrogeological parameters of an aquifer based on the dynamic development characteristics of the water flowing fractures induced by coal mining disturbance; (3) preparing model input files of different mining stages; and (4) compiling a circulating script program, calling the model input files of the different mining stages, and running the program to calculate the water inflow. According to the dynamic prediction method, hydrogeological parameter setting in the underground water model is dynamically adjusted according to the development characteristics of the water flowing fractures under mining disturbance during simulation calculation by compiling the circulating script program, and the dynamic prediction of the water inflow is realized on the basis of reasonable generalization of the dynamic coal mining process and the disturbance effect.

Description

technical field [0001] The invention belongs to the field of mine hydrogeology, and in particular relates to a dynamic prediction method for water inflow in coal mine working faces under mining disturbance conditions. Background technique [0002] The prediction result of mine water inflow is an important reference for mine drainage system design and one of the key technologies for mine water disaster prevention and control. With the increasing depth of coal mining in my country, the roof of the working face often develops aquitard formations with large differences in hydrogeological conditions and high water pressure. At the same time, the water-conducting fissures induced by coal mining activities can enhance the hydraulic connection between the roof aquifers and increase the water influx into the mine, resulting in a greater risk of water gushing in deep coal mining activities. [0003] At present, the common methods for predicting water inflow include water balance meth...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/18E21F17/00G06F30/20
CPCE21F17/00E21F17/18G06F30/20
Inventor 施小清张小茅徐红霞
Owner NANJING UNIV
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