公开(公告)号：US11780773B1

公开(公告)日：2023-10-10

申请号：US18300462

申请日：2023-04-14

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Jiangyu Wu ,  Dan Ma ,  Hai Pu ,  Qian Yin ,  Haixiang Zhang ,  Zhengfu Bian ,  Liyuan Yu ,  Hongwen Jing ,  Shuo Yang ,  Yiming Wang

IPC: C04B18/14 ,  C04B24/42 ,  C04B14/46 ,  C04B16/06 ,  C04B24/30 ,  C04B24/28 ,  C04B111/70 ,  C04B111/27 ,  C04B111/00

CPC classification number: C04B18/146 ,  C04B14/4643 ,  C04B16/0633 ,  C04B24/282 ,  C04B24/283 ,  C04B24/307 ,  C04B24/42 ,  C04B2111/00008 ,  C04B2111/27 ,  C04B2111/70 ,  C04B2201/50

Abstract: Disclosed are a grouting material for modifying mudstone, a preparation method and an application thereof, belonging to the technical field of material science and geotechnical engineering. The grouting material for modifying mudstone includes the following raw materials: cement, water, superfine micronized powder, water reducer, silane, fiber, diatomite, urea-formaldehyde resin and waterborne polyurethane. The preparation method of the grouting material for modifying mudstone includes steps of: (1) weighing the raw materials in parts by weight, mixing water of 40% of a total amount of water with water reducer, superfine micronized powder, fiber and diatomite, stirring to obtain a material A; (2) adding silane, urea-formaldehyde resin, waterborne polyurethane and residual water into the material A, obtaining a material B after continuous stirring; and (3) adding cement into the material B, and uniformly stirring to obtain the grouting material for modifying mudstone.

公开(公告)号：US20200240269A1

公开(公告)日：2020-07-30

申请号：US16756082

申请日：2019-03-12

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Yanlong Chen ,  Hai Pu ,  Feng Ju ,  Kai Zhang ,  Yu Wu ,  Ming Li ,  Jiangfeng Liu ,  Peng Wu ,  Jincheng Fan ,  Zhiwei Feng

IPC: E21D15/58 ,  E21D15/60

Abstract: A mechanical constant-resistance single prop continuous prop lifting pre-tightening device, structurally composed of a continuous prop lifting device, a pressurizing system, an oil supply line and a monitoring unit. The continuous prop lifting device is a core component, comprising a hydraulic cylinder, a prop barrel clamping sleeve ring and a prop rod clamping sleeve ring. The prop rod clamping sleeve ring is fixedly connected with a piston rod of the hydraulic cylinder by means of a cylinder head seat, and the prop barrel clamping sleeve ring is fixedly connected with a cylinder body of the hydraulic cylinder. With continuous pressurization of the pressurizing system, a cohesion occurs between the continuous prop lifting device and a prop rod, so that the prop rod of a single prop is lifted up to come into contact with a top plate and provide a pre-tightening force.

公开(公告)号：US11966672B2

公开(公告)日：2024-04-23

申请号：US18352344

申请日：2023-07-14

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Qian Yin ,  Jiangyu Wu ,  Hongwen Jing ,  Zheng Jiang ,  Tianci Deng ,  Hai Pu ,  Qiang Zhang ,  Bo Meng

IPC: G06F30/25 ,  G06F111/10

CPC classification number: G06F30/25 ,  G06F2111/10

Abstract: A method and a system for simulating contact and interaction between a support member and a chamber surrounding rock mass are provided in the application. The method includes: obtaining a support scheme of a roadway to be simulated, dividing the roadway to be simulated based on the support scheme to obtain several roadway sections; obtaining physical and mechanical parameters of each rock stratum in each roadway section and an occurrence state of the roadway surrounding rock; constructing particle flow numerical models corresponding to the roadway section; through the particle flow numerical models of every two adjacent roadway sections, obtaining a particle flow meso-structural evolution model of the roadway to be simulated; obtaining meso-mechanical parameters of the roadway to be simulated based on the particle flow numerical models, calibrating the meso-mechanical parameters through the physical and mechanical parameters, establishing the particle flow meso-structural evolution model of the roadway to be simulated.