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High water pressure releasing and blocking mining method for mining area

A mining method and high water pressure technology, which can be used in drainage, mining equipment, earth-moving drilling, etc., and can solve the problems of uneven distribution, difficult development of coal resources, and large karst water volume.

Inactive Publication Date: 2007-10-10
郭国政
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Due to the large amount of karst water and its uneven distribution, it frequently breaks into the mine, causing well flooding accidents, or it is difficult to develop a large amount of coal resources due to the excessively high water discharge coal pillars left to prevent water inrush from the floor

Method used

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  • High water pressure releasing and blocking mining method for mining area

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Embodiment Construction

[0008] Implement technical description of the present invention's technical situation of the present invention below by Jiaozuo Guhanshan mine test implementation:

[0009] 1. Mine overview

[0010] 1.1 Basic information:

[0011] The construction of Guhanshan Mine started in 1991 and was officially put into operation on November 1, 2003. The first level elevation is -450m. The designed annual production capacity of the mine is 1.2 million tons, and the service life is 53.8 years.

[0012] 1.2 Geological and hydrogeological conditions

[0013] (1) Geological conditions

[0014] From the old to the new, the strata of the ancient Hanshan minefield consist of Ordovician, Carboniferous, Permian, Triassic and Tertiary and Quaternary. The Lower Permian Shanxi Formation is mainly coal-bearing formation, composed of sandstone, sandy mudstone, Mudstone and main recoverable coal seam II of this minefield 1 coal composition. two 1 The coal is located in the lower part of the Shanx...

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Abstract

The present invention discloses a mining area high hydraulic pressure block-dreging mining method. Said method includes the following several steps: in the mining area coal bed floor excavating water discharge tunnel along the coal bed tendency, in the water discharge tunnel placing drilling yard and constructing water discharge drill hole into working face, fully utilizing cracks produced in the coral bed floor due to mine pressure to make the water be flowed into drillhole and discharged out from water discharge tunnel.

Description

technical field [0001] The invention relates to a method for preventing water inrush in the mining process of coal mines, in particular to a high water pressure dredging mining method in a mining area. Background technique [0002] Many coal mines in my country are threatened by floor karst water. Because there are various types of structural planes in the coal seam floor rock mass, stress concentration is most likely to occur at the end of the structural plane. The degree of stress concentration increases with the increase of water pressure and mine pressure and the decrease of horizontal stress. These parts are most likely to cause the expansion of rock mass fractures, instability and damage, and water inrush. Due to the large amount of karst water and uneven distribution, it frequently breaks into the mine, causing well flooding accidents, or it is difficult to develop a large amount of coal resources due to the excessively high water discharge coal pillars left to preve...

Claims

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Application Information

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IPC IPC(8): E21F16/00
Inventor 郭国政
Owner 郭国政
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