Coal seam floor limestone confined aquifer grouting reinforcement transformation method

A technology for confined aquifers and coal seam floors, applied in earthwork drilling, shaft equipment, wellbore lining, etc., can solve problems such as water damage threats, and achieve the effects of improved compressive strength and high-quality and efficient mining

Inactive Publication Date: 2020-04-21
BEIZHING LONGRUAN TEKNOLODZHIS INK
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Problems solved by technology

[0003] In view of the above problems, the application provides a method for grouting reinforcement of the coal seam floor limestone confined aquifer to solve the problem of water damage threat that the coal seam floor limestone confined aquifer exists in coal seam mining

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  • Coal seam floor limestone confined aquifer grouting reinforcement transformation method
  • Coal seam floor limestone confined aquifer grouting reinforcement transformation method
  • Coal seam floor limestone confined aquifer grouting reinforcement transformation method

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Embodiment Construction

[0033] In order to make the above purpose, features and advantages of the present application more obvious and understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] my country's coal seam floor limestone confined aquifer water disaster control has mainly gone through the following six stages: (1) surface pumping test; (2) underground water discharge test; (3) underground drainage and pressure reduction; (4) surface grouting reinforcement; 5) Downhole grouting reinforcement; (6) Surface downhole combined grouting reinforcement. The grouting material used gradually transitions from cement to clay cement grouting material. The purpose of grouting has also gone through the process from grouting to strengthen the aquifer of the coal seam floor to grouting to transform the confined aquifer of the floor. The grouting reinforcement reconstruction method for the limes...

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Abstract

The invention relates to the technical field of coal mine water disaster prevention and control, and provides a coal seam floor limestone confined aquifer grouting reinforcement transformation method.The method comprises the steps that a coal seam floor limestone confined aquifer grouting reinforcement transformation engineering scheme is designed, the grouting reinforcement transformation rangeis determined, then the drill hole plane position is designed according to a grid method, and drill holes are evenly distributed; the drill holes are evenly distributed in a drill site in an umbrellashape, and the design direction of the drill holes is perpendicular to or obliquely intersects with the development direction of a fracture structure and a crack; then drilling and grouting engineering construction is carried out, one drill site is arranged for the same gate road for drilling and grouting work, one drilling and grouting device is arranged for the same drill site, drilling and grouting continuous operation is carried out, grouting should be carried out immediately after one drill hole is constructed, and then another drill hole is constructed; and finally, the grouting effect is checked and evaluated. According to the method, through grouting reinforcement transformation of a coal seam floor limestone confined aquifer, safe, environment-friendly, high-quality and efficientmining of a fully mechanized coal mining face threatened by water damage of the coal seam floor limestone confined aquifer is achieved.

Description

technical field [0001] The application relates to the technical field of coal mine water disaster prevention and control, in particular to a grouting reinforcement reconstruction method for the limestone confined aquifer of the coal seam floor. Background technique [0002] my country's limestone karst area is large and widely distributed, with an area of ​​about 2Mkm 2 , accounting for about one-fifth of the total area of ​​the country. These areas are also important coal producing areas. 60% of the coal mines are threatened by floor karst confined water in different intensities, and the area and severity of water damage rank first among the major coal mining countries in the world. In the long-term large-scale development, shallow resources are gradually reduced and exhausted, and the depth of underground mining is also increasing. At present, many mines have entered deep mining, and the deepest one is nearly 1500m. The coal seam floor bears a lot of pressure from kars...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21D11/38
CPCE21D11/10E21D11/38
Inventor 毛善君陈玉华郭兵陈华洲李鑫超张鹏鹏
Owner BEIZHING LONGRUAN TEKNOLODZHIS INK
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