A funnel-type construction method for tall and large chambers

Abstract

The invention discloses a funneling construction method of a high and large chamber. According to the method, funneling construction is firstly adopted to expose partial surrounding rock of the arch top of the chamber; after the arch top is exposed, temporary support is carried out; the funneling construction is expanded and brushed to the lower part of the chamber; residues are discharged by a funneling well to enable an operation plane to downwards move step by step to a designed terrace until the construction of the chamber is completed. The funneling construction method is suitable for the high and large chamber which is over 15 m in height and over 30 m in length, and has the advantages that the residue discharging cost is low, the residue discharging technology is simple, a top plate is safe and easier to master, the ventilation is easy to solve, safety and environment protection are better and the like, the safety is realized, the efficiency is high, the ventilation and drainage are simple, the construction cost is reduced, the security risk is reduced, and the quality is easier to control.

Description

technical field [0001] The invention belongs to the technical field of mine construction, and more specifically relates to a funnel-type construction method for tall and large chambers. Background technique [0002] The chamber refers to the underground roadway with the same length of the three axes of the space and does not lead directly to the ground. Its function is usually to install various equipment, machines, store materials or tools, or use it as a machine repair room, rest room or disaster avoidance place. . [0003] Usually, there are methods such as joint road method, full-section construction method, step method, and pilot tunnel method for excavating chambers. However, for tall chambers with a height of more than 15 meters and a length of more than 30 meters, due to problems such as large span, difficult construction, great safety hazards, complex rock geological conditions, high ground pressure, and difficult ventilation and transportation, if using Ordinary ...

AI Technical Summary

Problems solved by technology

However, for tall chambers with a height of more than 15 meters and a length of more than 30 meters, due to problems such as large span, difficult construction, great safety hazards, complex rock geological conditions, high ground pressure, and difficult ventilation and transportation, if using Ordinary joint road construction, the uphill joint road is long and needs to turn several 90° bends, slag discharge and ventilation are difficult to solve; if the step method is used for construction, the exposed area of ​​the chamber vault is large, and the temporary The supporting procedure is complicated and the safety is difficult to guarantee.

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