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1.发明授权公开(公告)号：US11859493B2
公开(公告)日：2024-01-02
申请号：US17269557
申请日：2019-05-14
Inventor： Fenghai Yu , Kai Zhou , Yunliang Tan , Xuepeng Gao , Wei Zhao
Abstract: A device includes a pressure measuring segment, a connecting rod, a hydraulic pump, a pressure gauge, a high-pressure oil pipe, a pressure control valve, a tray, a push rod and a connection casing. The pressure measuring segment is on the connecting rod, a front end of the push rod is connected with the connecting rod, the tray is at a rear end of the push rod, the connection casing is connected with the tray. The pressure measuring segment includes a main pipe, a hydraulic bladder, a fixing ring, a barrier sheet, an outer pillow housing and a connection sleeve. Both ends of the hydraulic bladder are sleeved on the main pipe, an oil inlet is in communication with the hydraulic bladder, the outer pillow housing is sleeved on the main pipe, the connection sleeve is wrapped around the outer pillow housing.
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公开(公告)号：US11067392B2
公开(公告)日：2021-07-20
申请号：US17043778
申请日：2019-05-14
Inventor： Yunliang Tan , Kai Zhou , Fenghai Yu , Tongbin Zhao
Abstract: An anchor bolt length determination method based on monitoring of a roof rock stratum horizontal extrusion force includes drilling a borehole in the middle of a roadway roof to determine a surrounding rock fracturing scope by a borehole television. The method includes selecting the number and locations of horizontal extrusion force measuring points according to the surrounding rock fracturing scope. The method includes monitoring and recording a change of the horizontal extrusion force over time in the borehole by a device for monitoring a roof rock stratum horizontal extrusion force. The method includes selecting a location with the largest horizontal extrusion force as a center of a anchoring segment of an anchor bolt to determine a distance between the anchoring center and the roof. The method includes calculating a total length of the anchor bolt.
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3.发明授权公开(公告)号：US11703432B2
公开(公告)日：2023-07-18
申请号：US17872839
申请日：2022-07-25
Inventor： Fenghai Yu , Xuerui Yang , Yunliang Tan , Qiang Ren , Kai Zhou , Chuang Zhang , Pan Du , Qingduo Wang
IPC: G01N3/12
CPC classification number: G01N3/12
Abstract: An in-situ test device and method for surrounding rock strength of bolt supported roadway is provided. The test device includes a fixing mechanism, a loading mechanism, a measuring mechanism and a control system. The loading mechanism includes a hydraulic pump and a plunger pump, the hydraulic pump drives the plunger pump to work and controls the lifting speed of the loading cylinder; the measuring mechanism includes an infrared ranging unit and a wireless pressure monitoring unit; the control system controls the work of the loading mechanism and processes the monitoring data. The test device is directly installed in the roadway and fixed with the bolt. The device is loaded after leveling, the device is disassembled after the monitoring data are obtained, and the in-situ test for the surrounding rock strength of the bolt supported roadway is completed. The steps are simple and adaptable.
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