Safety anti-blocking construction process of soft aggregate in mine underground ultra-deep hole

Abstract

The invention relates to a safety anti-blocking construction process of soft aggregate in a mine underground ultra-deep hole. The safety anti-blocking construction process includes: drilling, judgingwhether the drilled hole and a water guide structure satisfy soft aggregate filling conditions, mounting a soft aggregate safety anti-blocking device into the drilled hole, filling the soft aggregateinto the water guide structure, starting a drilling rig at the same time to allow a drilling rig chuck to drive a central pipe to rotate rightwards, filling water into the central pipe at the same time through a water filling device connected to the head of the central pipe, ensuring that the high-temperature water flow in the drilled hole and the central pipe is constant before the water guide structure is filled with the soft aggregate until the soft aggregate is completely discharged from the drilled hole to the water guide structure, stopping the water filling and the soft aggregate filling, and taking out the soft aggregate safety anti-blocking device. By the safety anti-blocking construction process, the problem that the aggregate accumulates in the drilled hole and blocks the drilled hole during traditional soft aggregate filling which fills the soft aggregate into the mine underground hole.

Description

technical field The invention relates to a soft aggregate safety anti-blocking construction technology in ultra-deep boreholes in underground coal mines, and belongs to the field of prevention and control of underground water hazards in mines. Background technique Water inrush in coal mine mining face is one of the natural disasters affecting coal mining. Water inrush in coal mines not only threatens the safety of personnel at the operation site, but also threatens project safety and economic benefits. Long-term drainage measures will also increase coal mine operating costs. Therefore, it is one of the most effective methods to control mine water inrush to block the inrush water by drilling underground holes. Due to the deep buried depth of the mining face, some even exceed 1000m. There are many difficulties in downhole drilling construction and utilization of downhole drilling grouting. Especially when the borehole encounters a large water inrush fissure, it is extremely...

AI Technical Summary

Problems solved by technology

After the borehole is blocked, the drill bit needs to be reinserted into the borehole for punching. The process is complicated and the aggregate conveying efficiency is low, which directly affects the water blocking effect of the coal mine and the construction period.

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