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Method for evaluating influence degree of coal mining working surface on shallow groundwater

A technology of influence degree and evaluation method, which is applied in the direction of liquid level indicator, engine lubrication, height/horizontal measurement, etc., can solve the lack of dynamic change data of water level buried depth, evaluation of influence degree not involved in shallow groundwater, lack of influence degree Issues such as evaluation methods, evaluation indicators, and classification standards to achieve the effect of predicting water disaster accidents, novel methods, and simple method steps

Active Publication Date: 2021-04-30
XIAN UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] First, some research results use the depth of water level as the main characteristic of mining’s impact on groundwater to describe, but only choose the data of water level and depth at two time points before mining and after mining for comparison and analysis, lacking the mining process. Dynamic change data of buried depth of middle water level
[0005] Second, the scope of research involved in the research results is relatively large, generally a well field or a mining area, and the coal mining process takes the working face as the mining unit for mining, and the research results do not focus on the coal mining face. Research on the evaluation of mining impact degree proposed by small-scale units
[0006] Third, the research results do not involve the evaluation of the degree of impact of coal mining face on shallow groundwater, specifically the lack of evaluation methods, evaluation indicators and Type classification standard

Method used

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  • Method for evaluating influence degree of coal mining working surface on shallow groundwater
  • Method for evaluating influence degree of coal mining working surface on shallow groundwater
  • Method for evaluating influence degree of coal mining working surface on shallow groundwater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Construct the hydrological hole F5 at the central intersection of the direction of the working face and the inclination direction, and install an automatic groundwater monitoring system to monitor the water level of the weathered bedrock aquifer. At the same time, install a GNSS surface mobile automatic monitoring station within 5m of the F5 hole , real-time monitoring of the water level elevation of the differentiated bedrock aquifer and the elevation change of the orifice.

[0051] The weathered bedrock water level elevation change and orifice elevation settlement are continuously monitored before, during and after mining at the working face until the weathered bedrock water level elevation and surface settlement are basically stable.

[0052] The groundwater level data detected by telemetry is corrected with the orifice settlement data at the same time to obtain the absolute groundwater level elevation data.

[0053] Draw the corrected weathered bedrock aquifer water...

Embodiment 2

[0058] Before the mining of the working face, a hydrological hole S5 is arranged in the central position, and an automatic groundwater monitoring system is installed to monitor the water level of the submerged aquifer in real time. At the same time, a settlement GNSS real-time monitoring system is installed at the orifice.

[0059] Continuously monitor the change of the water level of the phreatic aquifer and the settlement of the orifice before, during and after the mining of the working face.

[0060] Using the orifice settlement data at the same time to correct the water level data of the phreatic aquifer measured by telemetry, the absolute groundwater level drawdown data is obtained.

[0061] Draw the corrected water level change curve of the phreatic aquifer and the surface subsidence curve ( Figure 4 , the mining start time of the working face in the figure is 0, it is a negative value before the start, and it is a positive value after the start).

[0062] Analyze the ...

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Abstract

The invention discloses a method for evaluating the degree of influence of a coal mining work surface on shallow groundwater, which comprises the following steps of: monitoring shallow groundwater level drop depth and surface subsidence in a recovery process, obtaining dynamic change data of groundwater level and surface subsidence, analyzing a relationship between the groundwater level drop depth and the surface subsidence; and determining the influence level of mining on underground water. The method is novel, the steps of the method are simple, the evaluation method can be provided for the influence of stoping of the coal face on shallow groundwater, the coal face can be designed according to the evaluation result, water-preserved coal mining is achieved, and water damage accidents can be effectively predicted.

Description

technical field [0001] The invention belongs to the technical field of mine water disaster prevention and control, and in particular relates to a method for evaluating the degree of influence of shallow groundwater on coal mining face. Background technique [0002] With the westward shift of my country's coal resources development strategy, the production of raw coal in the western region accounts for more than 60% of the country's total. For the western coal mining areas, especially the ecologically fragile mining areas, the contradiction between large-scale coal development and utilization and water resource protection has become increasingly prominent. Especially in areas where coal resources are buried shallowly, the recovery of coal resources has caused negative and irreversible impacts on shallow groundwater resources near the surface (diving and weathered bedrock aquifer water), which in turn leads to the degradation of the surface ecological environment. The industri...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/02G01F23/00G01C5/00
CPCG01C5/00G01F23/00G06Q10/06393G06Q50/02
Inventor 侯恩科龙天文谢晓深王双明侯鹏飞
Owner XIAN UNIV OF SCI & TECH
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