US 12,345,687 B1
Method and apparatus for classifying water-rich weak surrounding rock based on in-situ scribing
Fawang Zhang, Tianjin (CN); Liu Yang, Beijing (CN); Manchao He, Beijing (CN); Chengyu Miu, Beijing (CN); Zhehan Yu, Beijing (CN); Guangtao Dong, Beijing (CN); Benchao Xu, Beijing (CN); Fei Gong, Beijing (CN); Shulin Zhang, Beijing (CN); and Jiawei Cai, Beijing (CN)
Assigned to CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING, Beijing (CN); and Center for Hydrogeology and Environmental Geology Survey, CGS, Tianjin (CN)
Filed by CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING, Beijing (CN); and Center for Hydrogeology and Environmental Geology Survey, CGS, Tianjin (CN)
Filed on Jan. 17, 2025, as Appl. No. 19/026,687.
Claims priority of application No. 202410525232.2 (CN), filed on Apr. 29, 2024.
Int. Cl. G01N 3/42 (2006.01); G01N 21/3554 (2014.01); G01N 21/359 (2014.01)
CPC G01N 3/42 (2013.01) [G01N 21/3554 (2013.01); G01N 21/359 (2013.01); G01N 2203/0244 (2013.01); G01N 2203/0676 (2013.01); G01N 2203/0682 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for classifying a water-rich weak surrounding rock based on in-situ scribing, comprising the following steps:
step S1: obtaining a total length of a water-rich weak surrounding rock tunnel, and placing a scribing device on tunnel cross-sections of varying lengths;
step S2: performing the in-situ scribing on the tunnel cross-sections using the scribing device to obtain mechanical parameters of a tunnel surrounding rock, and determining a surrounding rock strength at different locations, wherein the mechanical parameters of the tunnel surrounding rock comprise indentation mechanical parameters and scribing mechanical parameters of the tunnel surrounding rock;
step S3: while the scribing device is performing the in-situ scribing on the tunnel cross-sections, employing a near-infrared spectroscopy to simultaneously measure an in-situ spectrum of the tunnel surrounding rock, and determining a surface water content at the different locations;
step S4: based on the scribing mechanical parameters of the tunnel surrounding rock, establishing a scribing depth curve, and calculating a joint development degree of the tunnel surrounding rock at the different locations from the scribing depth curve; and
step S5: based on the surrounding rock strength, the surface water content, and the joint development degree of the tunnel surrounding rock at the different locations, classifying surrounding rock grades of the tunnel cross-sections.