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Tunneling roadway impact ground pressure ground sound pre-warning method and device

A technology of ground pressure and ground sound, which is applied in the field of ground sound monitoring, can solve problems such as monitoring data interference and uncertainty, and achieve the effects of promoting development, improving risk assessment, and achieving significant safety benefits

Active Publication Date: 2020-06-30
TIANDI SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electromagnetic radiation is mainly used to monitor and predict rockburst based on the intensity of electromagnetic radiation in surrounding rocks. However, various underground signals often cause great interference to the monitoring data, which is likely to cause uncertainty in the results.

Method used

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  • Tunneling roadway impact ground pressure ground sound pre-warning method and device
  • Tunneling roadway impact ground pressure ground sound pre-warning method and device
  • Tunneling roadway impact ground pressure ground sound pre-warning method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Such as figure 1 As shown, this embodiment proposes a method for early warning of rock burst and ground sound in a driving roadway. The method includes:

[0030] Step 101: Set up a geo-sound probe in a potentially dangerous area of ​​the tunnel driving face.

[0031] In this step, there must be no geological fragmentation zone between the installation site and the monitoring area, and the number of geophones arranged for each area is four, among which two geophones are arranged on the side of the roadway in each area. The ground sound probe should be installed at the outcrop position of the bolt with a diameter of Φ18mm, and the length of the bolt out of the coal rock mass is generally 20mm. The length of the anchor rod deep into the stress change gradient zone is not less than 1.5m, and the anchoring method of the anchor rod is full anchoring. The distance between the two geophones on the same side is 50-100m, and the head-on distance of the first geophone from the tunneli...

Embodiment 2

[0067] 1. The geo-acoustic probe is arranged on the coal sill of the roadway in the area of ​​the driving face of the roadway, and there must be no geological broken zone between the installation site and the monitoring area. The number of ground sound probes arranged for each area is four, of which two ground sound probes are arranged on each side of the roadway. The ground sound probes should be installed at the outcropping position of the bolt with a diameter of Φ18mm, and the bolt shall be exposed to the coal rock mass. The length is generally 20mm. The length of the anchor rod deep into the stress change gradient zone is not less than 1.5m, and the anchoring method of the anchor rod is full anchoring. The distance between the two geophones on the same side is 50-100m, and the head-on distance of the first geophone from the tunneling face is 30-50m. As the tunneling surface advances, the two geophones on the same side move forward alternately. Such as figure 2 As shown, a...

Embodiment 3

[0095] This embodiment proposes an early warning device for rock burst and ground sound in an excavation roadway, such as Figure 4 As shown, the device includes:

[0096] The setting module 41 is used for setting the ground sound probe in the potentially dangerous area of ​​the tunnel driving face;

[0097] The noise reduction module 42 is used to perform noise reduction processing on the ground sound probe;

[0098] The obtaining module 43 is used to obtain the geophonic energy or frequency of the current tunneling surface through the geophonic probe;

[0099] The analysis module 44 is used to analyze the geophonic energy or frequency of the current excavation face using the MK trend check algorithm, determine the time sequence characteristics of the precursors of the rock burst and geophony, and determine the impact risk of the excavation face according to the time series characteristics.

[0100] In a specific embodiment, the analysis module 44 specifically includes:

[0101] A sampl...

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Abstract

The embodiment of the invention discloses a tunneling roadway impact ground pressure ground sound pre-warning method and device. The method includes the steps that ground sound probes are arranged inpotential dangerous zones of a roadway tunneling surface; the ground sound probes are subjected to noise reduction; the ground sound probes are used for acquiring the ground sound energy or frequencyof the current tunneling surface; and the ground sound energy or frequency of the current tunneling surface is analyzed through an MK trend test algorithm, time sequence characteristics of impact ground pressure ground sound precursors are determined, and the impact danger of the tunneling surface is determined according to the time sequence characteristics. The time sequence characteristics of ground sound monitoring data of the roadway tunneling working surface can be fully analyzed, and precursor information of impact ground pressure can be caught in time. By means of the method, danger evaluation and short-time real-time pre-warning of a ground sound monitoring system for the impact ground pressure of the tunneling working surface are effectively improved.

Description

Technical field [0001] The invention belongs to the technical field of ground sound monitoring, and particularly relates to a method and device for early warning of ground pressure ground sound in an excavation roadway. Background technique [0002] Coal mining in my country is dominated by underground mining. With the increasing social demand for coal resources and the gradual depletion of shallow coal resources, coal mines in many places will fully enter the stage of deep mining. Under the environment of "three highs and one disturbance" in deep mining, rock burst disasters will become one of the important problems faced by mine safety production. Rockburst monitoring and early warning is a key part of the rockburst research system. Improving the level of rockburst monitoring and early warning can not only make prevention measures more targeted, but also promote the development of rockburst mechanisms. Rockburst monitoring and early warning is also the weakest part of all rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/18G01V1/155G01V1/20G01V1/30
CPCE21F17/18G01V1/155G01V1/20G01V1/30G01V1/306
Inventor 潘俊锋王元杰路洋波李岩陈法兵孙学波
Owner TIANDI SCI & TECH CO LTD
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