Multiple-working-face parallel working process for shaft ground pre-grouting

Abstract

The invention provides a multiple-working-face parallel working process for shaft ground pre-grouting. The process is accurate in positioning and high in working efficiency. The technical scheme includes that the process comprises the steps of implementing an innovative process route which is different from traditional grouting for ground pre-grouting, dividing a shaft into a plurality of working faces, conducting multi-section grouting, during 800-1000m ultra-deep shaft operation, according to field conditions, enabling the 200-300m section to serve as a main grouting section, and dividing the main grouting section into three layers, wherein the first layer is the straight-hole grouting section, the second layer is the S-hole grouting section, and the third layer is the S-hole grouting section. According to the process, the technology of a straight hole and multiple-working-face S holes is adopted, the parallel working process that the vertical shaft ground pre-grouting is divided into a plurality of portions for simultaneous construction is initiated, specific positions in traditional processes are not required to be adopted, parallel operation of construction such as freezing and shaft sinking is possible, while the quality is guaranteed, the construction speed is accelerated, and the shaft building cycle is shortened for construction units.

Description

technical field [0001] The invention relates to the technical field of pre-grouting, in particular to a multi-face parallel operation process for pre-grouting on the surface of a shaft. Background technique [0002] At present, domestic wellbore surface pre-grouting mainly includes two types of schemes: full straight hole and S hole. The traditional solution of straight hole grouting uses a water source drilling rig to drill the grouting hole, which occupies the position of the wellhead. Subsequent construction such as freezing or sinking can only be carried out after the grouting is completed. Parallel operations such as injection, freezing, and drilling cannot be performed. Relatively long, generally 800 to 1,000 meters of wellbore, the grouting cycle is about one and a half years. S-hole directional technology is relatively backward. The difficulty of S-hole construction technology lies in the inaccuracy of directional trajectory. This has a lot to do with the domestic s...

AI Technical Summary

Problems solved by technology

The traditional solution of straight hole grouting uses a water source drilling rig to drill the grouting hole, which occupies the position of the wellhead. Subsequent construction such as freezing or sinking can only be carried out after the grouting is completed. Parallel operations such as injection, freezing, and drilling cannot be performed. Relatively long, generally 800 to 1,000 meters of wellbore, the grouting cycle is about one and a half years

S-hole directional technology is relatively backward. The difficulty of S-hole construction technology lies in the inaccuracy of directional trajectory. This has a lot to do with the domestic self-developed directional technology adopted by the current geology and mining industry. The directional technology of my country's geology and mining industry is relatively backward. relatively simple means

Often because the directional trajectory control is not up to standard, the grouting diffusion range cannot be crossed, the grouting effect is not ideal, and there is a considerable risk. At present, the failure of some engineering examples has caused many construction units to resist when choosing a construction plan mood

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