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Rapid maintaining method for broken roof in stope

A broken roof and rapid maintenance technology, applied in drilling equipment and methods, mining equipment, earthwork drilling and mining, etc., can solve the problems of insufficient effect and untimely prevention, and achieve the effect of preventing expansion and improving the strength of rock formations

Inactive Publication Date: 2013-10-23
SHANDONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a new, timely and fast effective method for maintaining the broken roof in order to solve the serious problems of untimely prevention and ineffective effect in the control of the broken roof in the multi-structure and high-stress areas of deep mining

Method used

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  • Rapid maintaining method for broken roof in stope
  • Rapid maintaining method for broken roof in stope
  • Rapid maintaining method for broken roof in stope

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Experimental program
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Effect test

Embodiment Construction

[0018] The inventive method step is as follows:

[0019] Step 1: Design and maintain the anchor drilling for the broken roof of the stope

[0020] During the mining process of the working face, when there are areas where roof cracks develop, small-scale fractures, and pressure expansion tend to be obvious, two drill holes are arranged within every 1.4m, the drill hole spacing is controlled at 0.9-1.0m, and the pre-drilling depth is 1.0-3.mm. Such as figure 1 shown.

[0021] Step 2: self-drilling anchor rod with steel bar roof protection

[0022] First, use common anchor drilling tools to detect the depth of the bolt on the pre-drilled hole. When the drilling tool reaches a certain depth and it is difficult to drill, it means that the drill hole has entered the complete rock formation, which is the effective depth. See figure 2 .

[0023] When the span of the broken roof is less than 100 meters and the depth is less than 15 meters, choose a self-drilling anchor with a len...

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Abstract

The invention discloses a rapid maintaining method for a broken roof in a stope. The rapid maintaining method comprises the steps of: firstly, designing an anchoring rod drill hole for maintaining the broken roof in the stope; secondly, carrying out canopy guard by adopting a self-drilling anchoring rod in combination with a reinforcing steel bar belt; and during the canopy guard, carrying out anchoring rod depth detection on a pre-drilled drill hole by using a common anchoring rod drill, and then selecting the type of the anchoring rod according to the breaking range of the roof. The invention solves the problems of multiple constructions, high stress, and immediate, rapid and effective maintenance of the broken roof under the condition of large embedding depth.

Description

technical field [0001] The invention belongs to the technical field of mining. Background technique [0002] Mine mining roof accident is one of the major disaster accidents in mines. With the increase of mining depth and the application of large mining height mining technology, roof breakage often occurs during the mining process, resulting in local or large-scale roof fall accidents, which not only affect production, but also cause safety hazards. Hidden danger. Roof accidents are common in coal mines in my country, including roof accidents during the installation and advancement of mining face equipment, roof accidents during the advancement of tunneling face, and accidents during roadway maintenance. At present, the prevention and control of such accidents is basically the same as the conventional prevention and control methods, mainly adopting artificial filling and temporary support measures. With the increase of mining depth and the popularization and application of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D19/06E21D20/02E21D21/00E21B7/00
Inventor 潘立友刘兆明蔡世忠刘秉明陈友武
Owner SHANDONG UNIV OF SCI & TECH
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