A microseismic monitoring method during the operation period of an underground water-sealed cavern

Abstract

The invention relates to a method for monitoring operation period slight earthquakes of an underground water sealed cavern. The method comprises the steps of determining a monitoring area; arranging slight earthquake monitoring holes with different depths in a water curtain tunnel; arranging a speed type sensor in each slight earthquake monitoring hole; based on a random simulating method and an optimization method, calculating a positioning error expected value of each sensor configuration solution, and determining an optimal configuration solution; arranging an instrument well at an appropriate position on ground, arranging an instrument chamber next to a well head, placing a data acquisition instrument and a data acquisition computer; arranging a central control room, and placing a dataanalysis computer. The method for monitoring the operation period slight earthquakes of the underground water sealed cavern realizes an operation period slight earthquake sensor monitoring network which covers the whole cavern, and can greatly improve accuracy of a monitoring result, safety, durability and maintainability of an instrument.

Description

technical field [0001] The invention relates to the technical field of microseismic monitoring for underground rock engineering, in particular to a method for microseismic monitoring during the operation period of an underground water-sealed cavern. Background technique [0002] Rock engineering microseismic monitoring technology takes the microseismic wave signal released during rock fracture as the monitoring object. Through mathematical and mechanical analysis of the microseismic information, the location and characteristic parameters of the microseismic source can be determined, and the stability and safety of the underground engineering can be judged accordingly. The application of microseismic monitoring technology in underground engineering began at the beginning of the last century in gold mining in the Johannesburg area of ​​South Africa. By the middle of the last century, mining microseismic monitoring research and development have been carried out in Poland, the Un...

AI Technical Summary

Problems solved by technology

[0004] At present, there are relatively few patents on microseismic monitoring of underground water-sealed caverns, and they focus on the microseismic monitoring system and the introduction of microseismic monitoring methods during construction. The main technical content basically follows the microseismic monitoring technology experience in mining, water conservancy and hydropower projects There are almost no microseismic monitoring schemes designed in combination with the engineering characteristics of underground water-sealed caverns.

In addition, how to use microseismic monitoring technology in a timely, efficient and accurate manner to systematically monitor the possible microcracks in the rock mass of the underground water-sealed cavern during the operation period, evaluate the damage and damage of the surrounding rock, and identify the potential instability area of ​​the rock mass in advance , so as to correctly judge the water sealing effect and the stability of the surrounding rock. At present, there is still a lack of technical research on this aspect at home and abroad.

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