Method for identifying rock mass failure instability early warning

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...

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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

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