A method of excavating a shaft with water
A wellbore and water-carrying technology, used in wellbore lining, well sinking, earthmoving, etc., can solve the problem that the wellbore grouting pressure cannot be guaranteed, the wellbore grouting cannot achieve the expected effect, and the wellbore quality is poor, etc. problems, to ensure the quality of pouring, prevent the influence of rock water, and facilitate the operation.
Active Publication Date: 2022-02-18
CHINA UNIV OF MINING & TECH
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Problems solved by technology
Later, when the borehole wall grouting method is used to control the leakage water of the borehole wall, due to the poor quality of the borehole wall, in order to prevent further rupture of the borehole wall, the grouting pressure has to be controlled, that is, the grouting pressure of the borehole wall cannot be guaranteed, and the borehole wall Grouting did not achieve the desired effect
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[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts all belong to the protection scope of the present invention.
[0033] Such as Figure 1 to Figure 5 As shown, a wellbore with water excavation method specifically includes the following steps:
[0034] 1) After the pre-grouting treatment, in the rock section with a large amount of water inflow or the micro-permeability and weak-permeability rock section, the conventional drilling and blasting method is used to remove the gravel after rock drilling; after the pre-grouting treatment, during the excavation p...
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The invention discloses a method for excavating a wellbore with water. The specific steps are: excavating the water-bearing rock layer section of the wellbore, laying the anti-drainage board on the bare rock wall of the surrounding rock, supporting the formwork on the well wall and pouring concrete, and the total water volume after the anti-drainage board of the wellbore reaches When setting the limit value, construct concrete grout pad at the bottom of the well and grout filling on the well wall, and repeat the above steps to complete the excavation of the aquifer section of the wellbore with water; the principle is simple, the operation is convenient, and it can effectively solve the problem of water discharge when the wellbore crosses the aquifer rock layer. The quality assurance of the lower shaft wall and the treatment of water gushing.
Description
technical field [0001] The invention relates to the field of mine construction, in particular to a method for digging and laying a shaft with water. Background technique [0002] The shaft is vividly called the throat of underground mining mines, and it undertakes the important task of mine personnel, equipment, materials entering and exiting the well and mine ventilation. At present, the main wellbore construction methods are divided into freezing method, drilling method, and common method. The freezing method and drilling method are special drilling methods, which are mainly used in special geological conditions such as thick loose layers. In the actual drilling process, the common method is most widely used. The common method mainly adopts the drilling and blasting method for rock drilling, uses grab buckets and buckets to remove gravel, and the well wall is poured with conventional concrete. In the process of sinking by common method, aiming at the condition that the we...
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IPC IPC(8): E21D5/012E21D5/04E21D1/08E21D1/10
CPCE21D5/012E21D5/04E21D1/08E21D1/10
Inventor 钱自卫孟凡贞吕文茂侯俊华赵迎春蔡逢华范宝江
Owner CHINA UNIV OF MINING & TECH