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A Classification Method for Water Conservation Coal Mining Mine/Mining Area

A technology for water-retaining coal mining and mines, which is applied in ground mining, underground mining, special mining, etc., can solve the problems of spring and lake water reduction, drying up, vegetation withering and desertification intensification, and achieve the effect of simple and practical division method

Active Publication Date: 2019-06-28
CHINA UNIV OF MINING & TECH
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Problems solved by technology

However, coal mining for more than ten years has caused large-scale damage to the shallow surface water resources in the area, cut off the flow of valleys, reduced or even dried up springs and lakes, resulting in difficulties in water use for industry and agriculture, surface drought, vegetation withering, and desertification, and other secondary ecological geology. disaster

Method used

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  • A Classification Method for Water Conservation Coal Mining Mine/Mining Area
  • A Classification Method for Water Conservation Coal Mining Mine/Mining Area
  • A Classification Method for Water Conservation Coal Mining Mine/Mining Area

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Embodiment

[0071] The area where the Yushen mining area is located is an arid-semi-arid area (annual average precipitation is less than 500mm). The water resources with direct water supply significance and ecological value in the well field are the surface water system and the phreatic water of Salawusu Formation sand layer. For the unit area of ​​surface water system water resources (1km 2 ) storage capacity, first calculate the static total storage capacity of each river’s water resources based on the following formula, and then calculate the unit area of ​​each river (1km 2 ) storage capacity.

[0072] The static reserves of each river are:

[0073] Q j =Q×L / V

[0074] In the formula, Q j is the static reserve of the river (in m 3 ); Q is the flow rate (in L / s); L is the length of the river (in m); V is the flow velocity (in m / s).

[0075] For the unit area (1km 2 ) storage capacity, count the drilling data in the mining area, sort out the thickness of the phreatic aquifer in ...

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Abstract

A grading method of mines / mining areas for water-preserved mining, comprising: using a mine as a calculating unit to calculate the ton-coal water resource amount, and dividing the mine in a study area into different types according to the relationship between the distribution of the ton-coal water resource amount and the ton-coal water resource consumption amount, and forming a mine ton-coal water resource storage amount grade map; determining the thickness of a protective layer according to the relationship between the water leakage of a shallow surface layer and the water supply of the shallow surface layer, dividing the mine in the study area into different environmental engineering geological modes, and forming a mine environmental engineering geological mode distribution map; and finally, grading the mines / mining areas for water-preserved mining in the study area. The method is simple and practical, the water-preserved mining grade of the mines is divided visually, a basis for selecting a mining method in the mining area is provided, and a great significance for the water-preserved mining in fragile ecological environment areas in northwest China is achieved.

Description

technical field [0001] The invention relates to the field of coal mining, in particular to a method for classifying water-retaining coal mines / mining areas. Background technique [0002] The western part of my country is an arid-semi-arid area, with a serious shortage of water resources and a fragile ecological and geological environment, which seriously restricts and affects regional economic and social development. When the regional topography and stratum conditions are suitable, the shallow surface water formed is a very precious water resource. For example, in the northern Shaanxi coalfield, the Mu Us Desert beach is widely distributed in the upper Pleistocene Salawusu Formation (Q3s) sand bed, the runoff water formed by atmospheric rainfall in the loess gully distribution area, and the surface reservoir (Haizi), etc. In addition, the Jurassic coalfields in western my country have huge resource reserves, and the coal quality is good, so the mining prospect is broad. Du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/18
CPCE21C41/18
Inventor 李文平王启庆范开放刘士亮
Owner CHINA UNIV OF MINING & TECH
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