US 12,352,914 B2
Stereoscopic identification method and apparatus for disturbance stress evolution process of underground cave surrounding rock
Shaojun Li, Wuhan (CN); Guangliang Feng, Wuhan (CN); and Minzong Zheng, Wuhan (CN)
Assigned to INSTITUTE OF ROCK AND SOIL MECHANICS, CHINESE ACADEMY OF SCIENCES, Wuhan (CN)
Filed by INSTITUTE OF ROCK AND SOIL MECHANICS, CHINESE ACADEMY OF SCIENCES, Wuhan (CN)
Filed on Oct. 31, 2022, as Appl. No. 18/051,503.
Claims priority of application No. 202210376484.4 (CN), filed on Apr. 12, 2022.
Prior Publication US 2023/0324574 A1, Oct. 12, 2023
Int. Cl. G01V 1/28 (2006.01); G01V 1/30 (2006.01)
CPC G01V 1/288 (2013.01) [G01V 1/30 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A stereoscopic identification method for disturbance stress evolution process of rock that surrounds an underground cave, comprising:
collecting rock structural characteristics of a borehole between a target underground cave of which the disturbance stress evolution process is to be measured and a nearby excavated cave through a borehole camera before the target underground cave is excavated;
collecting rock fracture vibration wave information on the periphery of the borehole through a three-component microseismometer placed in the borehole between the target underground cave and the nearby excavated cave during the process of excavating the target underground cave;
calculating microseismic apparent stress evolution information at each source location of rock fracture based on the rock fracture vibration wave information;
collecting disturbance stress evolution information, at a position where a disturbance stress gauge is mounted, through the disturbance stress gauge placed in the borehole during the process of excavating the target underground cave; and
performing a numerical inverse analysis of three-dimensional stereoscopic disturbance stress of a surrounding rock of the target underground cave in combination with the rock structural characteristics of the borehole, the microseismic apparent stress evolution information at each source location of rock fracture, and the disturbance stress evolution information at a position where the disturbance stress gauge is mounted, the result of analysis being taken as a stereoscopic identification result of the disturbance stress evolution process of rock that surrounds an underground cave of the target underground cave.