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Deslagging method in vertical shaft excavation process

A technology for shaft and well washing, which is applied to shaft equipment, earth-moving drilling and wellbore flushing, etc., can solve the problems of inability to discharge slag, insufficient drilling gas hydraulic pressure, etc., and achieve the effect of large particle size particle slag discharge

Inactive Publication Date: 2019-05-10
CITIC HEAVY INDUSTRIES CO LTD +1
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  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problem that the slag cannot be discharged due to insufficient gas and hydraulic pressure difference in the initial stage of drilling

Method used

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  • Deslagging method in vertical shaft excavation process
  • Deslagging method in vertical shaft excavation process

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Embodiment Construction

[0018] Such as figure 1 , 2 As shown, a method for removing slag during the excavation of a vertical shaft adopts a multi-absorbing port pump suction lift mixed type well washing and slag removal system; the steps are as follows:

[0019] 1). Install the slag discharge device, install the mud pump on the three-arm tunneling frame of the roadheader; install multiple suction ports evenly through the pipeline to the bottom of the cutter head of the roadheader;

[0020] 2). The pump-suction-lifting mixed-type well washing and slag discharge. During the excavation process, the well is always full of mud and slag. The sinking shaft roadheader drives the cutter head to rotate, and the cutter head begins to dig downward under the action of gravity. The sludge produced by excavation and the water injected into the well form a mud liquid under the agitation of the self-rotating cutterhead of the shaft boring machine;

[0021] a. Pump suction method, under the action of the mud pump 6 ...

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Abstract

The invention belongs to the technical field of vertical shaft construction, and discloses a deslagging method in the vertical shaft excavation process. Slag is discharged by adopting a multi-absorption-port pump suction lift mixed type well flushing and slag discharging system; firstly, a deslagging device is installed, and a slurry pump is installed on a three-arm type heading machine frame of aheading machine; a plurality of absorption ports are uniformly distributed and mounted at the bottom of a cutter head of the heading machine through a pipeline; pumping, lifting and mixing type wellflushing and slag discharging are conducted, and under the pumping effect of the slurry pump, the slurry is discharged into a ground slurry purifying pond; and well flushing and slag discharging are carried out through a gas lift method of compressed air injection. According to the invention, the technical problems of difficult deslagging and low efficiency in the prior art are overcome, and the engineering progress is improved.

Description

technical field [0001] The invention belongs to the technical field of shaft construction, and in particular relates to a method for discharging slag during shaft excavation. Background technique [0002] In recent years, with the shortage of urban land resources and the upgrading of planning concepts, the field of urban underground space has developed rapidly. Among the urban underground space projects, vertical deep well projects are gradually increasing due to their small footprint and high space utilization. At present, the shaft slag discharge method mainly adopts the positive circulation + gas lift type well washing method. During the drilling process, water is injected into the well, and the mud is rotated by the rotation of the cutter head, and the mud drill is discharged into the mud pool, and the mud is settled and purified through the purification pool. It flows into the well again and flushes the working face. After drilling to a certain depth, the slag can be d...

Claims

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Application Information

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IPC IPC(8): E21D7/00E21B21/00E21B21/16
Inventor 孟永红郑立宁苗军克荆伟赵智峰朱文汇赵红红胡熠曹立钢巫晨笛
Owner CITIC HEAVY INDUSTRIES CO LTD
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