Grouting process for working surface of deep well

Abstract

The invention relates to a grouting process for a working surface of a deep well, which comprises a pore forming process and a grouting process and is characterized by comprising the following steps of: firstly, after the height of a tunneling section of a grout stop pad meets the requirement, carrying out drilling and water exploration on a lower rock stratum by using an umbrella drill; secondly, arranging a large lining formwork in the tunneling section of the grout stop pad and then constructing a drilling platform by utilizing the large lining formwork; thirdly, embedding an orifice pipe, a water filtering bucket and a water filtering layer and pouring concrete; and finally, perforating pressure relieving holes on the grout stop pad and carrying out drilling and grouting operation. The grouting process for the working surface of the deep well is reasonable, can have universality, can improve the working efficiency of the pre-grouting operation of the working surface of the deep well, guarantees that the waterproofing construction of a mineshaft is carried out successfully, and has a short grouting period and low construction cost.

Description

technical field [0001] The invention belongs to the anti-seepage technology of grouting in deep well working faces during mine mining, and in particular relates to a grouting technology in deep well working faces. Background technique [0002] With the expansion of the scale of mining underground engineering, more and more projects often encounter complex formations such as fractured aquifers, sandstone pore water, limestone cave water, fault fracture zone water, and karst subsidence column water. These formations are often rich in water sources , The large amount of water inflow may cause accidents such as water inrush, collapse, and caving, and even cause safety accidents such as well flooding and casualties. Stratum grouting water blocking construction technology is one of the effective technical methods to control these complex strata to eliminate possible or existing water damage. [0003] The formation grouting water plugging technology has the advantages of simple eq...

AI Technical Summary

Problems solved by technology

In recent years, with the increase of vertical wellbore depth, more and more deep working face pre-grouting tasks are in front of us. For deep well grouting (600 meters deep) projects, we use the original grouting technology , encountered many problems: because the aquifer is deeply buried, water pressure and ground pressure are high, there are higher requirements for drilling, injection equipment, pipeline compression resistance and grouting pressure, etc. There are many problems in deep well grouting technology. It can be solved, leading to the failure of domestic deep well grouting projects in the past two years, which fully shows that there is a big difference between deep well grouting and shallow well grouting