Shandong University

Shaanxi Xitan Geological Equipment

Shaoshuai Shi

Shucai Li

Liping Li

Zongqing Zhou

Hongliang Liu

Jing Wang

Jie Hu

Chunjin Lin

Zhijie Wen

Weimin Yang

Chenglu Gao

Shangqu Sun

Zhenhao Xu

Zhenhua Liu

Zhaofeng Li

Lei Yang

Xuguang Chen

Hanpeng Wang

Mengtian Li

Cong Liu

Zhaohui Dong

Shuaixun Luo

Jianbo Zhao

Xingzhi Ba

Hongyun Fan

Chengshun Shang

Yang Geng

Chengshuai Qin

Wenfeng Tu

Lei Tian

Guangyu Yang

Songsong Bai

Fanbao Meng

Qinghan Wang

Enrui Xing

Qianqing Zhang

Cong Hu

Meixia Wang

Shuai Cheng

Zhongdong Fang

Shengli Yang

Zizheng Sun

Shen Zhou

The present invention provides a whole-space drilling-grouting integrated device, comprising: a traveling mechanism comprising a drilling-grouting mechanism of which one side is provided with a rod-changing robotic arm and comprising an adjusting mechanism; the adjusting mechanism is connected to a platform that connected to a supporting platform through a drilling-moving mechanism; an output shaft of a power mechanism fixed on the supporting platform is detachably connected with a drilling tool; a first drilling tool clamping mechanism arranged at tail end of the platform is connected to arc-shaped guide rail arranged on the platform in a sliding way and is further connected to rotating driving member of the platform so as to realize rotation around an axis of output shaft of the power mechanism; and, a second drilling tool clamping mechanism fixedly connected to tail end of the platform where far away from power head.

Whole-space drilling-grouting integrated device

A platform, system, and method for simulating critical rock collapse of surrounding rock in underground engineering includes: four vertically arranged reaction walls defining a square reaction space, and a base mounted at a lower end opening of the wall; and a row of horizontally arranged stress loading plates at a side of each wall close to the reaction space, and a reaction beam above this space, where the reaction beam, the stress loading plate, and the base define a loading space, and the loading space is configured for placement of a surrounding rock simulation block to be tested; the stress loading plate capable of moving horizontally in a direction of the reaction wall, and the reaction beam capable of moving in a vertical direction, so as to load the surrounding rock simulation block; and the stress loading plate and the reaction beam being driven by linear motion units for movement.

Platform, system and method for simulating critical rock collapse of surrounding rock in underground engineering

A system and method for rock mass structure detection and dangerous rock detection including a rock mass structure automated detection device and a server. The rock mass structure automated detection device includes a three-dimensional laser scanning device and a two-dimensional image acquisition device for respectively acquiring three-dimensional laser point cloud data and a two-dimensional image of a tunnel construction region. The server communicates with the rock mass structure automated detection device and includes a block structure three-dimensional modeling module and a block structure geometric stability analysis module. By considering the influence of the same group of structural faces in a rock mass, the effect of a newly-generated structural face subjected to blasting disturbance, and the finite dimension of a structural face, blocks in shapes of polygonal pyramid and polygonal frustum can be constructed to comply with engineering practices, and the geometric stability of any polygonal pyramid can be rapidly analyzed.

System and method for rock mass structure detection and dangerous rock detection

A discrete element method contact model building method includes: selecting a filling body in a disaster-causing structure to obtain a change rule of cumulative loss of the filling body; performing test simulation, and determining a relation function of each group of corresponding mesoscopic mechanical parameters in each time period and mesoscopic parameters of a DEM contact model representing a change rule of macroscopical parameters of the filling body; embedding each mesoscopic parameter relation function into an existing particle contact model, performing test simulation, and updating a fracture failure criterion of the contact model according to a corresponding relation of macro-mesoscopic strength during model failure; and based on a seepage failure indoor test, building a seepage failure discrete element calculation model, and simulating the seepage failure process of a rock and soil mass by using the obtained particle contact model and the fracture criterion of the particle contact model.

Discrete element method (DEM) contact model building method for reflecting weakening of seepage on rock and soil mass strength

A volume measurement system and method for a closed water-filled karst cave, including a water collecting device, concentration tester and control system. The control system is connected to the water collecting device by a connecting piece. The water collecting device is a container with a top closed and bottom open. The water collecting device top is a piston. The piston is connected to a propulsion rod, and propulsion rod is controlled by control system to extend or retract, so as to realize the forward or backward movement of the piston. An openable and closeable placement table is hinged to the water collecting device's inner wall. The placement table is connected to piston, the placement table moves upward when piston is raised, and placement table moves downward when piston is lowered. The placement table is configured to accommodate a chemical substance. The concentration tester is configured to detect the solution's concentration.

Volume measurement system and method for closed water-filled karst cave

Fully automatic true triaxial tunnel and underground project model test system, including a triaxial loading device for loading model test piece, automatic data collection and analysis device, power system and control system; triaxial loading device includes test bench, vertical loading system, horizontal front and back, and left and right loading systems, and the vertical, horizontal front and back, and left and right loading systems apply three-way pressure to model test body; test bench functions for supporting, fixing, and providing counter-force; automatic data collection and analysis device includes micro optical fiber sensor embedded in model test piece, optical fiber monitoring system, micro pressure box and strain brick, and can collect multi-field information.

Fully automatic true triaxial tunnel and underground project model test system

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.

Grouting anchor bolt and grouting anchor cable for supporting of large deformation and constant resistance and quantitative roadway supporting method

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.

Test device and test method of fractured rock mass collapse and rockfall and fracture water inrush

Device and method for measuring true triaxial creep of a geotechnical engineering test block, including a supporting structure; the device includes four confining pressure-plates and upper-and-lower compression-plates forming an enclosed cavity for the test block; confining pressure-plates include two long confining pressure-plates and two short-confining pressure-plates, upper-and-lower compression-plates are rectangular top and bottom steel-plates, two L-shaped long confining pressure-plates bent towards the outer side lapped on two adjacent side faces of the bottom steel-plate, two L-shaped short-confining pressure-plates bent towards the outer side lapped on remaining two-side faces of the bottom steel-plate, and bottom ends of the short-confining pressure-plates are placed on the bottom steel-plate; top ends of long confining pressure-plates lapped on the top steel-plate, and top steel-plate leans against inner side faces of two short-confining pressure-plates; vertically pressure sensors corresponds to four confining pressure-plates and upper-and-lower compression-plates in the supporting structure, and grating shortrulers on pressure sensors.

Device and method for measuring true triaxial creep of geotechnical engineering test block

Growing community of inventors

Jinan, China

Shaoshuai Shi