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Method for identifying rock mass failure instability early warning

A rock mass and tangent technology, which is applied to earth-moving drilling, mining equipment, instruments, etc., can solve the problems of false early warning conclusions and poor rock mass failure and instability early warning effects, and achieves a simple method, improves early warning reliability, and is easy to popularize. applied effect

Active Publication Date: 2012-06-20
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

[0005] The present invention is aimed at problems such as mine safety, road and railway traffic tunnels, water conservancy and hydropower chambers and other projects with poor rock mass failure and instability warning effect, and easy to produce wrong early warning conclusions, etc., and proposes to use stress displacement monitoring data to realize rock mass failure and instability A method of early warning is not only simple, but also greatly improves the accuracy of early warning of rock mass failure and instability

Method used

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  • Method for identifying rock mass failure instability early warning
  • Method for identifying rock mass failure instability early warning
  • Method for identifying rock mass failure instability early warning

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Embodiment Construction

[0028] This specific implementation of the new method of early warning of rock mass rupture and instability is carried out as follows:

[0029] (1) Determine the rock mass monitoring and early warning area, divide and number the key monitoring and early warning areas, and the numbers correspond to the data changes of stress increment and displacement increment, so as to obtain a clear monitoring network;

[0030] (2) Carry out stress monitoring and displacement monitoring drilling construction according to the design. The bottom of the stress drilling hole should be located in the rock mass that is prone to failure and instability, and cannot be located in the rock mass in the original rock state; the deepest anchor point of the multi-point displacement meter drilling hole should be at original rock state;

[0031] (3) The installation of the borehole stress gauge should be within 3 times the radius of the excavation space to grasp the stress state of the rock mass; the deepes...

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Abstract

The invention belongs to the field of mine safety, relating to a method for identifying rock mass failure instability early warning by utilizing stress displacement monitoring. The method is characterized by comprising the following steps of: determining a monitoring area in an excavated rock mass and numbering, monitoring stress and deformation changes of the rock mass by utilizing a borehole stressmeter and a multipoint position extensometer and monitoring in real time, converting a tangent modulus value of the rock mass, mastering a change trend of the tangent modulus value of the rock mass, and judging whether the rock mass failure instability early warning is carried out or not. The method disclosed by the invention is simple in construction, low in cost, good in effect, has better reliability and early warning accuracy, has the capabilities of shortening the time of the rock failure instability early warning, improving the safety environment of construction and avoiding the losses of labors and devices, and is suitable for the fields of mines, tunnels, side slopes, hydropower station chambers and the like formed by excavating the rock mass.

Description

technical field [0001] The invention belongs to the field of mine safety, and relates to a method for realizing early warning and identification of rock mass damage and instability by using stress displacement monitoring, which is applicable to mines excavated by rock mass, chambers of hydropower stations, side slopes, tunnels and the like. Background technique [0002] With the depletion of mineral resources in the shallow part of the surface and the increasing depth of mining, the early warning of rock mass failure and instability is becoming more and more important. The early warning of rock mass failure and instability is a kind of rock mass during the excavation process, as well as during the mining process of the mine or ore block. To achieve the purpose of disaster early warning. [0003] In the process of ore body mining, strengthening stress and displacement monitoring is an important task to grasp the change of rock mass. Domestic stress-displacement monitoring g...

Claims

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Application Information

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IPC IPC(8): E21F17/18G01L1/00G01B21/32
Inventor 王春来
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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