Segmented curtain grouting method for fault working face with too large inclination angle of shaft

Abstract

The invention discloses a segmented curtain grouting method for a fault working face with a too large inclination angle of a shaft. The driving working face of the shaft is casted with a concrete grouting stop cushion, an initial drilling stage of construction is started in the grouting stop cushion along the concentric circumference of the shaft, an orifice pipe is mounted in a boring orifice position, construction drilling is continued via the orifice pipe till a grouting depth position, a flange is installed in the orifice pipe, and connected with a high-pressure grouting hose and a grouting device, the orifice pipe is sealed and fixed in a gravity grouting manner, and space between the orifice pipe and a boring is filled tightly by a cement slurry. A segmented boring grouting manner isused to avoid construction of multiple grouting holes in a narrow space of the shaft, the number of grouting holes is reduced much, the drilling efficiency is improved, and shaft construction periodis shortened; and grouting is carried out in a cyclic manner by alternation among penetration, soil compaction and cleavage, the water blocking performance of grouting is improved, fragmented surrounding rocks are more reliable, and it is ensured that the shaft penetrates 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

Images