A Construction Method of Segmented Curtain Grouting in Fault Working Face with Excessive Dip Angle of Shaft Shaft

Abstract

The invention discloses a segmental curtain grouting construction method for a working face of a fault with an excessively large dip angle in a vertical shaft shaft. A concrete anti-grouting cushion is poured on the excavation working face of the vertical shaft shaft, and the construction starts on the grouting mat and along the concentric circle of the vertical shaft shaft. Drill the initial section, then install the orifice pipe at the hole position of the drilled hole, continue drilling through the orifice pipe to the grouting depth position, then install the flange on the orifice pipe, and connect the high-pressure grouting through the flange For hose and grouting equipment, the orifice pipe is sealed and fixed by gravity grouting, and then the space between the orifice pipe and the drill hole is filled and compacted with cement grout. The present invention can avoid constructing multiple grouting holes in the narrow space of the wellbore through segmental drilling and grouting, greatly reduces the number of grouting holes, improves drilling efficiency and shortens the well construction period; through penetration and The compaction and splitting alternate cycle grouting technology improves the reliability of grouting water blocking and reinforcement of broken surrounding rock mass, and ensures that the wellbore can pass through the fault efficiently and safely.

Description

technical field [0001] The invention relates to the technical field of mine shaft excavation, in particular to a segmented curtain grouting construction method for a fault working face with an excessively large inclination angle of a shaft shaft. Background technique [0002] With the rapid development of the national economy, the demand for mineral resources is increasing day by day. The construction of deep mines and other underground projects is extending and shifting to complex and changeable geological conditions, and project construction is moving to difficult areas. In particular, most of the mine fields in my country encountered problems such as many aquifers, large water content, and large water inflow during the shaft construction period, which seriously affected the construction speed and quality of the shaft engineering, and even accidents where the mine was submerged by sudden water gushing occurred. Major economic losses and casualties. Therefore, properly hand...

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: In order to overcome the technical problems of many grouting holes in faults with excessively large dip angles in the prior art, a large amount of pore-making engineering, and poor grouting effects, the present invention provides a shaft shaft that passes through faults with high dip angles efficiently and safely curtain grouting method

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