公开(公告)号：US20240384643A1

公开(公告)日：2024-11-21

申请号：US18598189

申请日：2024-03-07

Applicant: Northeastern University

Inventor： Jun ZHAO ,  Xiating FENG ,  Mengfei JIANG ,  Jiachao XUE ,  Chengxiang YANG

IPC: E21B47/002 ,  E21B7/02

Abstract: Disclosed are a borehole fracture-deformation-wave velocity integrated intelligent sensing apparatus and method for an engineering rock mass. The apparatus includes an in-hole monitoring execution unit and an out-hole monitoring unit which are connected by a cable; the in-hole monitoring execution unit includes a hole-diameter-adaptive crawling robot and a combined multifunctional probe assembly; the probe assembly includes a high-definition wide-angle camera, a laser radar probe, and an acoustic transceiver probe, and all the probes may be freely combined; the hole-diameter-adaptive crawling robot is of a waterproof sealed shell structure and is capable of charging a pressure inside to realize leakage detection, and the hole-diameter-adaptive crawling robot adopts lift-type electric crawler walking mechanisms capable of automatically adjusting a supporting force to avoid sliding. The apparatus can be used for intelligent long-term monitoring of borehole fracture, deformation and wave velocity.

公开(公告)号：US20210247283A1

公开(公告)日：2021-08-12

申请号：US16965521

申请日：2019-09-26

Applicant: Northeastern University

Inventor： Xiating FENG ,  Jun ZHAO ,  Jun TIAN ,  Chengxiang YANG

IPC: G01N3/24 ,  G01N3/12

Abstract: The invention provides a multi-functional true triaxial shear test device and method for hard rocks, the device comprises a hydraulic system, a left-end combination tangential loading oil cylinder, a right-end combination tangential loading oil cylinder, a front-end combination lateral loading oil cylinder, a rear-end combination lateral loading oil cylinder, an upper normal loading oil cylinder, a lower normal loading oil cylinder, an annular framework, a lateral auxiliary push-and-pull framework, an annular framework support platform, a horizontal support platform and a test chamber. The stiffness of the device is improved, and besides, a total section stress covering loading manner of the rock samples in a shear process is guaranteed. Through improving a temperature reduction manner of front ends of the oil cylinders, the situation that high temperature does not enable the temperature of hydraulic oil in the oil cylinders to rise to affect normal motion of the actuator can be guaranteed.