Method for judging impact risk of inclined shaft stope by window intervention method

A dangerous and interventional technology, applied in mining installations, mining equipment, earth-moving drilling, etc., can solve the problems of difficult stress distribution, energy release range, difficult quantitative early warning of the risk of stope impact at the oblique axis, etc.

Pending Publication Date: 2021-03-26
SHANDONG UNIV OF SCI & TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

Conventional methods and conventional monitoring techniques are difficult to quantitatively warn the impact risk of the stope at the syncline axis, and it is difficult to monitor the stress distribution and energy release range caused by the unreasonable relationship between ground stress and engineering layout

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  • Method for judging impact risk of inclined shaft stope by window intervention method
  • Method for judging impact risk of inclined shaft stope by window intervention method
  • Method for judging impact risk of inclined shaft stope by window intervention method

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Embodiment Construction

[0016] An embodiment of the present invention provides a method for judging the impact risk of a syncline shaft stope by window intervention method, which includes the following steps:

[0017] 1. According to the specific mining environment of the stope, the rock burst risk assessment report and other data, combined with the specific ground stress observation data, determine the impact risk monitoring area, see figure 1 ;

[0018] 2. Construct multiple observation boreholes along the direction of the roadway and in accordance with the vertical direction of the principal stress. The depth of the boreholes is generally 12-15m. Install pressure-bearing stress gauges. figure 2 ;

[0019] 3. Continuously observe the displacement change of the stress gauge, combined with the dynamic performance, judge the degree of impact risk according to the sudden change of displacement, see image 3 .

[0020] The basic principles and main features of the present invention and the advantage...

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Abstract

The invention discloses a method for judging the impact risk of an inclined shaft stope by a window intervention method. The method comprises the following steps of: step 1, ground stress observationand analysis: according to the specific position of the stope and geological mining conditions, carrying out ground stress field observation, and in an area where a ground stress field is observed, studying and judging the damage trace of ground stress on a roadway on site as a basis for impact risk prediction; step 2, artificial window intervention technology: for the inclined shaft stope, arranging observation drill holes in the direction vertical to the main stress direction according to the observation result of the ground stress field, installing pressure-bearing stress meters vertical totop plates and bottom plates in the drill holes, observing the change of stress, and converting the change into displacement; and step 3, judging the impact risk by sudden change of displacement in the window: continuously observing the displacement condition of the stress meters, and taking the sudden change of the displacement of the stress meters in the plurality of drill holes as impact riskearly warning.

Description

technical field [0001] The invention belongs to the technical field of coal mining, and specifically relates to a method for judging the impact risk of a stope at a syncline axis through a window intervention method. Background technique [0002] Rock burst is one of the most serious disasters in coal mines, and it is becoming more and more serious. The geological conditions of deep mines in my country are complex and changeable, and the deeper the geological factors play a decisive role, the factors affecting rock burst include structure, buried depth, roof, coal seam hardness, mining factors, etc. Among them, the rock burst caused by syncline structure Occupies a large proportion, and is prone to coupling damage. How to solve structural rock burst is a major technical problem faced by coal mines. Under such conditions, conventional measures such as improved roadway layout, coal seam water injection, strong support, coal seam pressure relief, broken top, broken bottom and ...

Claims

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Application Information

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IPC IPC(8): E21F17/18
CPCE21F17/18
Inventor潘立友周脉来欧阳振华
OwnerSHANDONG UNIV OF SCI & TECH