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Multi-working-face goaf water inflow while-mining refined prediction method

A multi-working face and prediction method technology, applied in the coal field, can solve the problems of lack of boundary conditions for continuous mining of multi-working faces, low prediction accuracy of water inflow in goafs of multi-working faces, and less consideration of stratum deposition laws, etc.

Pending Publication Date: 2020-07-14
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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Problems solved by technology

[0006] The main purpose of the present invention is to solve the problem of water inflow in goafs of multi-working faces caused by the division of hydrogeological parameters of aquifers in the prior art with less consideration of stratum deposition rules and the lack of a generalization method for continuous recovery boundary conditions of multi-working faces Due to the technical problem of low prediction accuracy, a fine-grained prediction method for water inflow in goafs with multiple working faces is proposed

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  • Multi-working-face goaf water inflow while-mining refined prediction method
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  • Multi-working-face goaf water inflow while-mining refined prediction method

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Embodiment 1

[0034] The present invention is a fine-tuned prediction method for water inflow in goafs with multiple working faces, which mainly includes the following steps:

[0035] Step 1: Study on the sedimentary law of the water-filled aquifer strata;

[0036] On-site investigation of field outcrops in typical formations, collection of core samples from exploratory coring boreholes, and collection of full-hole logging curves. Using the principle of sedimentology, according to the characteristics of each stratum marker layer and its logging curve, compare and divide the typical strata of the coal seam roof; according to the petrology, paleontology and logging curve marks, identify the sedimentary facies of the typical strata and determine the occurrence form of the sedimentary facies . This content provides the basis for the division of hydrogeological parameters in numerical simulation. At the same time, if the groundwater is phreatic, the main seepage equation is the differential eq...

Embodiment 2

[0055] A mine in the Hujierte mining area of ​​Dongsheng Coalfield, Inner Mongolia Autonomous Region mainly mines Yan’an Formation 2-1 coal. There are 9 working faces in the first mining area. In the second section of aquifer, the recovery planning of the first mining area is to continuously recover the 9 working faces year by year. Therefore, it is necessary to accurately predict the water inflow in the gobs of the 9 working faces as the mining progress continues before the mining of the working faces. This is the first mining area. Provide reference for the design of drainage system and mine permanent drainage system.

[0056] The specific working process is as follows:

[0057] Step 1: Study on the sedimentary law of the water-filled aquifer strata;

[0058] According to the marker layers of Jurassic strata and their logging facies characteristics, the third member of Yan'an Formation, the first member of Zhiluo Formation and the second member of Zhiluo Formation were comp...

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Abstract

The invention relates to a method for predicting water inflow, belongs to the technical field of coal, and particularly relates to a multi-working-face goaf water inflow while-mining refined prediction method. According to the invention, stratum deposition rules and sedimentary facies characteristics of stratum are combined, aquifer permeability coefficient partitions are divided, a multi-working-face continuous mining boundary condition refined generalization method based on time, space and water level is provided, a three-dimensional hydrogeological conceptual model and a numerical model ofa research area are established, and the multi-working-face goaf water inflow is predicted in a refined mode. By means of the method, the generalization method of the multi-working-face continuous stopping boundary conditions and the multi-working-face goaf water inflow while-mining continuous fine prediction numerical method are perfected, the water inflow prediction result better conforms to theactual on-site water inflow, and the multi-working-face goaf water inflow prediction precision is improved.

Description

technical field [0001] The invention relates to a method for predicting water inflow, which belongs to the technical field of coal, in particular to a fine-tuned prediction method for water inflow in goafs with multiple working faces. Background technique [0002] Mine water inflow refers to the amount of water that enters the mine through different channels from different water sources during the construction or development of the mine. The prediction of mine water inflow is the basis of mine design, mining planning and water disaster prevention and control. Over the years, a series of mine water inflow prediction methods have been formed through the continuous accumulation of hydrogeological workers. At present, the calculation of mine water inflow can be roughly divided into deterministic and non-deterministic calculation methods. Among them, non-deterministic calculation methods include correlation analysis method, gray theory method, hydrogeological analogy method, ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06F30/20G06F111/10G06F111/04
CPCG06Q10/04
Inventor 刘基王皓靳德武赵春虎杨建许峰尚宏波周振方乔伟王强民
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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