Technology for rapidly constructing air shaft under chill condition and process for sinking vertical shaft pit shaft

A conditional, cold technology, applied in wellbore lining, wellbore/well components, well sinking, etc., can solve problems such as ventilation and gas problems that cannot be fundamentally solved

Inactive Publication Date: 2010-04-14
中煤第一建设有限公司第四十九工程处
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  • Abstract
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Problems solved by technology

Taking some control measures such as conventional ventilation system transformation and gas drainage, although effective, cannot fundamentally solv

Method used

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Embodiment Construction

[0004] The embodiment that the present invention solves its technical problem to take is:

[0005] 1. There are 28 freezing holes, 3 construction temperature measuring holes and 1 hydrological observation hole, and a total of 32 drilling holes with a depth of 115m and a total construction volume of 3540m. Two DZJ500-1000 drilling rigs are used for construction, and the JDT-5 gyro inclinometer is used for orientation, and the eccentric deflector is used for deflection.

[0006] The freezing station is mainly equipped with 3 YSLG20F Freon screw refrigeration units, two of which are running and one is in standby. 2 10SH-9 brine pumps, one running and one standby, 2 12SH-9A cooling water circulation pumps, one running and one standby, 2 NBL-250 cooling towers and other equipment, used for the flow of brine in the main pipe Electromagnetic flowmeter monitoring, single-hole brine flow is measured by a special measurement circuit, and a temperature measuring port is reserved at the ...

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Abstract

The invention discloses a process for rapidly constructing an air shaft under a chill condition, mainly comprising the following steps: creating a pore, freezing the pore, constructing a temperature-measuring pore and a hydrologic observation pore and creating a drill hole together. The process is used for sinking all vertical shaft pit shafts by sealing water through three-synchronization of freezing, slip-casting and shaft sinking in the construction process, wherein the three-synchronization refers to the synchronous construction of the preparation and the installation of a permanent shaft frame, the freezing of a surface soil section and the digging and the building of the pit shaft while the ground preliminarily slip-casting construction is carried out, a freezing method is adopted in the surface soil section, and a group preliminarily slip-casting method is adopted in a bed rock section.

Description

technical field [0001] The invention relates to a well construction technology for all vertical shaft shafts dug by adopting the freezing method for the topsoil section and the ground pre-grouting method for sealing water in the bed rock section, especially a rapid well construction technology suitable for wind wells under cold conditions. Background technique [0002] As the depth and scope of shaft mining have increased in recent years, the amount of gas emitted from mines has also increased, and gas has a great impact on mine safety. Taking some control measures such as conventional ventilation system renovation and gas drainage is effective, but it cannot fundamentally solve the ventilation and gas problems. The construction of boundary ventilation shafts is a major issue for the safety of mine production, and it is imperative. Through special technical means, the freezing, ground pre-grouting, and wellbore excavation work are carried out simultaneously within a period o...

Claims

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Application Information

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IPC IPC(8): E21D1/12E21B7/06E21D5/04E21B47/02
Inventor 赵京虎范聚朝付英军司经胜靳丽娟赵静
Owner 中煤第一建设有限公司第四十九工程处
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