Construction method for microseisms monitoring and stress relieving of strong rockburst tunnel

Abstract

The invention discloses a construction method for microseisms monitoring and stress relieving of a strong rockburst tunnel. The construction method comprises the steps that firstly, a microseisms monitoring system is installed, and microseisms monitoring and rockburst predicting are performed; secondly, specific positions where rockburst possibly happens, the scale and the intensity of the rockburst are obtained through the microseisms monitoring system; thirdly, a stress relieving hole is drilled through a drilling jig; fourthly, an explosive is loaded and detonated; fifthly, the treatment of danger eliminating, water spraying and dust falling are performed, and slag is discharged; sixthly, primary concrete spraying is performed on a working face; seventhly, shell-expansion type prestress hollow grouting anchor rods are arranged systematically; eighthly, a reinforcing rib mesh is arranged in a laying mode, and concrete is sprayed again. The construction method for microseisms monitoring and stress relieving of the strong rockburst tunnel overcomes the defects that in a traditional stress releasing process, drilling and explosion are blind and a stress releasing effect is poor. According to the construction method for microseisms monitoring and stress relieving of the strong rockburst tunnel, prediction of a stress concentrating portion is accurate, stress releasing is in place, a detecting result of a releasing effect is reliable, rockburst prevention pertinence is strong, and the construction method for microseisms monitoring and stress relieving of the strong rockburst tunnel is simple, practical, strong in operability and good in effect.

Description

technical field [0001] The invention relates to a microseismic monitoring and stress relief construction method for a strong rockburst tunnel. Background technique [0002] Although during the excavation of tunnels (caves) with large buried depth and high ground stress, rockburst predictions can be made based on methods such as advance forecasting, previous cavern measurements, and energy theory, and corresponding countermeasures can be taken accordingly, but the current prediction level is extremely accurate. Moreover, with the excavation and construction of the tunnel (hole), due to the comprehensive influence of geological conditions, cross-section shape and size, construction method, construction sequence and other factors, the scale and intensity of rockbursts will have large fluctuations. If it is not handled properly, it will lead to a lot of problems such as equipment damage, roof profile damage, support cost increase, personal injury, and psychological barriers of c...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of blind drilling and blasting and poor stress release effect in the previous stress release process, and provide a method with accurate prediction of stress concentration parts, stress release in place, reliable release effect detection results, and targeted rockburst prevention and control. Strong and simple, practical, operable and effective construction method for microseismic monitoring and stress relief in strong rockburst tunnels

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