公开(公告)号：US20230384473A1

公开(公告)日：2023-11-30

申请号：US18031715

申请日：2021-10-15

Applicant: SHANDONG UNIVERSITY ,  SHANDONG HI-SPEED GROUP CO., LTD.

Inventor： Lichao NIE ,  Lei CHEN ,  Yong ZHOU ,  Chuan WANG ,  Xinji XU ,  Jian LI ,  Zhengyu LIU ,  Ning ZHANG ,  Peng BAI ,  Yongheng ZHANG ,  Dongdong XIE

IPC: G01V3/38 ,  G01V3/02

CPC classification number: G01V3/38 ,  G01V3/02

Abstract: A method and system for advanced detection and optimization of tunnel resistivity based on depth resolution. The method includes integrating all acquired electrode measurement data into comprehensive set, calculating its model resolution matrix, and selecting plurality of electrode measurement data from comprehensive set to form initial set; adding measurement data of electrodes that are not in initial set to initial set to form plurality of temporary subsets; calculating depth resolution balance goodness function of temporary subset according to model resolution matrix, selecting temporary subset with optimal value of depth resolution balance goodness function as new initial set, and determining whether average relative model resolution of initial set meets optimization requirements; if requirements are not met, continuously updating temporary subset, otherwise outputting initial set; determining number and position of tunnel face measurement electrodes according to updated initial set, and obtaining effective observation mode of advanced detection of optimized borehole resistivity.

公开(公告)号：US20230384470A1

公开(公告)日：2023-11-30

申请号：US18031693

申请日：2021-10-15

Applicant: SHANDONG UNIVERSITY ,  SHANDONG HI-SPEED GROUP CO., LTD.

Inventor： Peng JIANG ,  Yuxiao REN ,  Qifeng WANG ,  Zhiwu ZUO ,  Xinji XU ,  Kai WANG ,  Lei CHEN ,  Chuanyi MA ,  Shuai CAO ,  Senlin YANG ,  Qingyang WANG ,  Xianglong MENG

IPC: G01V1/28

CPC classification number: G01V1/282 ,  G01V2210/642 ,  G01V2210/66 ,  G01V2210/6222

Abstract: A method for three-dimensional velocity geological modeling with structures and velocities randomly arranged, including determining base points in three-dimensional space, building equation according to the base points to determine planar layered model, complicating a tilt layer of planar layered model, and building a fold layer model of a surface in three-dimensional space; building three-dimensional fault folded model based on the three-dimensional surface fold layer model combined with a fault plane of a random reference point and displacement of each point in a global coordinate system; building a velocity model containing a salt body based on the three-dimensional fault folded model, and simulating salt body intrusion in a geological body of a certain depth; and performing a random velocity amplitude to realize three-dimensional velocity modeling according to the layered type which has been set and according to the set velocity range and the velocity difference range between each layer of geology.

公开(公告)号：US20220390635A1

公开(公告)日：2022-12-08

申请号：US17769909

申请日：2020-12-08

Applicant: SHANDONG UNIVERSITY

Inventor： Shucai LI ,  Bin LIU ,  Xinji XU ,  Lei CHEN ,  Chao FU ,  Lei HAO

IPC: G01V1/30 ,  G01V1/18

Abstract: The present invention discloses a system and method for phased array sound wave advanced geological exploration for a shield tunneling machine. The system includes a phased array sound wave emitting and receiving apparatus, a probe automatic telescopic apparatus, an automatic protection and cleaning apparatus, and a signal processing and imaging system. Sonic probes are installed on a side wall of a main spoke, opposite to a rotation direction, of a cutterhead of the shield tunneling machine, on the basis of automatic detection of a telescopic state and a contact state, sonic array probes are enabled to make contact with a tunnel face by a hydraulic push rod, a focus sound wave is emitted by using a phased array emitting technology, and a reflected wave signal with front geological information reflected from the front of the tunnel face is received. A scanning direction of a sound wave beam is controlled and changed continuously through a host system, on the premise of obtaining a suspected abnormal body position, the suspected position is imaged in detail by using a focusing image till scanning of a whole two-dimensional section is completed, then the cutterhead is rotated to change an arrangement direction of an array to continue scanning of a next two-dimensional section, and finally three-dimensional geological exploration in front of the tunnel face is realized.

公开(公告)号：US20220326403A1

公开(公告)日：2022-10-13

申请号：US17430545

申请日：2020-07-13

Applicant: SHANDONG UNIVERSITY

Inventor： Shucai LI ,  Bin LIU ,  Xinji XU ,  Lei CHEN ,  Jiansen WANG ,  Chao FU ,  Yuxiao REN

IPC: G01V1/28 ,  G01V1/30

Abstract: A multi-wavefield seismic detection method and system based on construction noise of a shield machine. Multi-wavefield seismic information such as a body wave and a surface wave formed during propagation of a seismic wave generated by excitation in a stratum is obtained by using noise information caused by the construction of a shield machine as a seismic source, a stratum velocity model along a tunnel is constructed through joint inversion, and reflection wave information or the like is used for migration imaging, to eventually implement relatively accurate detection of a geological condition in front of a tunnel face of shield construction.