公开(公告)号：US20210040849A1

公开(公告)日：2021-02-11

申请号：US16475561

申请日：2018-01-10

Applicant: SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Zhijie WEN ,  Shaoshuai SHI ,  Shengli YANG ,  Lei TIAN ,  Fanbao MENG ,  Enrui XING

IPC: E21D20/02 ,  E21D21/00 ,  G06F30/20

Abstract: Provided are a grouting anchor bolt and a grouting anchor cable for supporting of large deformation and constant resistance and a quantitative roadway supporting method, wherein an anchor bolt comprises a casing, a hollow rod body, an anchor cylinder, a tray, a fastening nut and a clamping pin, a front end of the casing is sealed and a rear end of the casing is opened, a middle position of the casing is provided with a plurality of grouting holes, an inner diameter of the casing from the middle position of the casing to the rear end becomes small gradually, a side surface of a front end of the hollow rod body is sleeved with an anchor cylinder, the anchor cylinder is inserted into the casing and movably connected with the casing, the anchor cylinder is connected with the casing through the clamping pin, a rear end of the hollow rod body is sequentially assembled and connected with the tray and the fastening nut. The beneficial effects herein are as follows: the anchor bolt and the anchor cable simple in structure, easy to process, simplifies operations of supporting and grouting, and therefore particularly suitable for supporting of large deformation for surrounding rocks. The self-bearing capability of surrounding rocks is improved, and the supporting of large deformation of surrounding rocks is provided through constant resistance, thereby realizing organic combination of “yielding-supporting” and “active-passive supporting”; the quantitative roadway supporting method may realize quantitative supporting for a roadway.

公开(公告)号：US20190285525A1

公开(公告)日：2019-09-19

申请号：US16314607

申请日：2017-09-13

Applicant: SHANDONG UNIVERSITY

Inventor： Shucai LI ,  Liping LI ,  Shaoshuai SHI ,  Zongqing ZHOU ,  Hongliang LIU ,  Jie HU ,  Shangqu SUN ,  Jing WANG ,  Wenfeng TU ,  Zhijie WEN

IPC: G01N3/36 ,  G01N33/24 ,  G01N3/12

Abstract: A test device and a test method of fractured rock mass collapse and blockfall and fracture water inrush includes a fractured rock mass preparation device, a water source loading device, a surrounding rock pressurization device and a slide rail, wherein the fractured rock mass preparation device is fixed at one end of the slide rail, and the water source loading device is fixed on the other side of the slide rail. An opening is formed in the rock mass water storage structure, and the size of the opening is adapted to the size of the fractured rock mass; the surrounding rock pressurization device includes one bracket and a pressurization structure arranged below the bracket, and a space for accommodating the fractured rock mass is reserved below the pressurization structure; and the bottom support and the bracket are both movably installed on the slide rail.

公开(公告)号：US20240167943A1

公开(公告)日：2024-05-23

申请号：US18505930

申请日：2023-11-09

Applicant: Guizhou University ,  SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Zhijie WEN ,  Zhenqi Song ,  Yujing Jiang ,  Shucai Li ,  Yujun Zuo ,  Jianping Zuo ,  Kang Peng ,  Shankun Zhao

IPC: G01N21/31

CPC classification number: G01N21/31 ,  G01N2201/06113 ,  G01N2201/0636

Abstract: A method and a system for determining a supporting structure by combining a stress environment and an underground surrounding rock structure are provided in the disclosure, which relates to the technical field of stability analysis of coal-mine rock mass. The method includes: defining a stress peak position and an in-situ stress position by determining the stress environment; identifying the underground surrounding rock structure, identifying lithology and constructing a three-dimensional model of a rock stratum to analyze damage degree of the rock stratum; pretreating, namely normalizing, the damage degree of the rock stratum at two sides and comparing the damage degree of the rock stratum at a roof and the floor; and identifying the supporting structure and determining supporting effectiveness and a supporting length. The method of the disclosure is different from related art, and ensures that the supporting structure meets mechanical foundation and practical engineering requirements as a whole.

公开(公告)号：US20230008988A1

公开(公告)日：2023-01-12

申请号：US17786596

申请日：2020-11-26

Applicant: SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Zhijie WEN ,  Jing HUANG ,  Peng XIAO ,  Jingkai ZHANG ,  Hengzhong ZHU

IPC: E21B43/295

Abstract: An underground gasifier pre-control structure includes a flame retardant injection system. The flame retardant injection system includes a flame retardant injection shaft pipe channel drilled from ground to a coal seam and a flame retardant injection channel located in the coal seam. The flame retardant injection channel includes a first flame retardant injection channel and a second flame retardant injection channel at both sides of each gasifier and a third flame retardant injection channel located in a horizontal direction of an adjacent gasifier. The first flame retardant injection channel includes a horizontal section along a strike of the coal seam and a bypass section offset toward the gasifier. The flame retardant injection system forms a wet coal wall in the coal seam to achieve pre-control for the gasifier. The pre-control structure wets the coal masses at both sides of the gasifier and the gasifier does not spread toward both sides.