Digging method for preventing strong or strong rock burst on active face

A tunnel face and rockburst technology, which is applied in the field of excavation with strong or extremely strong rockburst prevention and control, to ensure personal safety, ensure construction progress, and improve the ability to resist rockburst impact.
CN101560882AActive Publication Date: 2009-10-21POWERCHINA HUADONG ENG COPORATION LTD
0 Cites 43 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
POWERCHINA HUADONG ENG COPORATION LTD
Publication Date
2009-10-21

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a digging method for preventing a strong or strong rock burst on an active face. The technical problem to be solved is to provide an active face strong or strong rock burst prevention digging method capable of effectively reducing the rock burst frequency on the active face and reducing the destructiveness of the rock burst. The method comprises the following specific steps: a, carrying out the shothole arrangement and charging design according to a conventional slotting proposal; b, drilling tunneling shotholes and stress-relief shotholes on the slotted active face; c, charging the tunneling shotholes in a convention mode, and charging the stress-relief shotholes in the 32 mm hole bottom within a deep buried range from 2 to 3m; d, detonating the stress-relief shotholes and the tunneling shotholes in turn; and e, tapping slag, and repeating the steps till the digging is completed. The method is mainly applied to deep buried hard rock tunnel projects for traffic, mining, water conservancy and hydraulic power, and the like.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to an excavation method for prevention and control of strong or extremely strong rockburst on the face of the face. It is mainly suitable for deep buried hard rock tunnel projects such as transportation, mining, water conservancy and hydropower. Background technique

[0002] In areas with intense tectonic movement, various forms of rockbursts are often encountered during the construction of deep-buried hard rock tunnels. Among them, the strong and extremely strong rockbursts that occur on the face of the tunnel seriously threaten the safety of construction workers and mechanical equipment. most serious threat. Such as figure 1 The conventional face shown is prone to rockburst if excavation and blasting are carried out directly. Moreover, the rockburst on the working face has a strong deterrent effect on the psychology of the construction workers. Once entering the potential strong rockburst section, it is not uncommon for worke...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More