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Ultra-large hole-diameter drilling shaft drilling method

A technology of aperture and shaft, which is applied in well sinking, shaft equipment, earth-moving drilling, etc., can solve the problems of frequent maintenance, low ventilation efficiency, and hanging air ducts occupying the space of construction equipment, so as to save the heating link, eliminate the Accumulation of harmful gas and good effect of underground climatic conditions

Active Publication Date: 2013-12-04
王绍华
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AI Technical Summary

Problems solved by technology

The hanging air duct takes up space for construction equipment, requires frequent maintenance, and has low ventilation efficiency, and separate heating is required for construction in winter

Method used

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  • Ultra-large hole-diameter drilling shaft drilling method

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Embodiment Construction

[0040] Such as figure 1 As shown, the method of drilling a vertical shaft with an extra-large aperture includes drilling, wellhead expansion and well neck construction, installation of equipment, construction of the foundation wall of the wellbore, installation of ballast transportation equipment, reaming of the hole to form a well, and construction of the well wall. Its characteristics are: The concrete steps of its method are as follows:

[0041] (1) Drilling:

[0042] a. Use a drilling rig to drill a hole 8 at a predetermined position, with a diameter of 700mm, and connect it with the underground communication lane 12;

[0043] b. Use sprayed cement mortar to support the hole wall, with a wall thickness of 30mm;

[0044] c. installing a high-strength hole-protecting wear-resistant pipe 9 in the borehole;

[0045] (2), wellhead expansion and well neck 4 construction:

[0046] a. Stripping the topsoil at the wellhead;

[0047] b. Construction of wellhead lock and well ne...

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Abstract

The invention provides an ultra-large hole-diameter drilling shaft drilling method, and belongs to the technical field of coal mining. The ultra-large hole-diameter drilling shaft drilling method is mainly used for solving the problems that according to the shaft construction technology in the prior art, due to constraint of systems such as a lifting system and a drain system, mechanical advancement cannot be carried out on a working face, the construction period is long, and the amount of safety hidden danger is large. The ultra-large hole-diameter drilling shaft drilling method comprises the steps of (1) carrying out drilling, (2) expanding a wellhead in an excavation mode, carrying out construction of a foreshaft, (3) installing devices, constructing a shaft foundation wall, installing a slag conveying device, (4) carrying out hole expansion to form a shaft, and (5) carrying out lining on a shaft wall. The ultra-large hole-diameter drilling shaft drilling method solves the drain problem which has the highest influence on the shaft construction, and omits a drain device of the working face, working procedures are carried out in a non-ponding environment, most of rock slag can automatically slide away, and conditions can be provided for mechanical operation of shaft sinking.

Description

technical field [0001] The invention belongs to the technical field of coal mine engineering construction, and in particular relates to a method for drilling shafts with extra-large apertures. Background technique [0002] The existing technical characteristics of vertical shaft in coal mine engineering construction are as follows: [0003] a. Blasting method is used to break rock. Due to the constraints of the hoisting and drainage systems in the traditional shaft construction process, the working face is currently not equipped with mechanized excavation conditions, and the blasting method is used for all excavation; [0004] b. The winch lifts out the ballast. The lifting container adopts a bucket with a small capacity, and the rock loading adopts a suspended rock grab, which has problems such as heavy transportation workload and poor safety of the working face; [0005] c. Drainage adopts stage water tanks plus lifting pumps, and is continuously lifted and released alo...

Claims

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Application Information

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IPC IPC(8): E21D1/08E21D5/00E21D7/00
Inventor 王绍华肖占文闫玉清张晓峰闫玉宝
Owner 王绍华
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