Abstract: A geomechanical fluid-solid coupling testing device for water inrush from coal mine collapse column is disclosed, which comprises a testing bed and a collapse column simulating device, wherein the testing bed has a box type structure with an opening at its top and is provided therein with multiple layers of similar materials in which a tunnel or a mining face can be dug out; and the collapse column simulating device comprises a plexiglass barrel with openings at both its top and bottom, the plexiglass barrel is provided at its top opening with a plexiglass lifting device and a hard plastic baffle, and the plexiglass lifting device is provided with a lifting level which is connected with a lifting rope.
Type:
Application
Filed:
July 17, 2015
Publication date:
January 21, 2016
Applicant:
CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING
Abstract: A method for determining a weight-adjusting parameter in a variable-weight vulnerability assessment method for water-outburst from coal seam floor, comprising the steps of determining a dominant factors and a constant-weight weighting value, further comprising the following steps: 1) building a state variable-weight vector formula; 2) selecting or giving an assessment unit in accordance with constraint conditions; 3) determining an optimum variable-weight weighting value of the selected assessment unit; and 4) solving a value of the weight-adjusting parameter according to a parameter solving model. The method for determining a weight-adjusting parameter in assessment and prediction of vulnerability for water-outburst from coal seam floor by means of a variable-weight model is proposed at the first time. In this method, an optimum variable-weight weighting value of the selected assessment unit is set, and then a value of the weight-adjusting parameter is solved according to a built parameter solving model.
Type:
Application
Filed:
February 13, 2015
Publication date:
August 20, 2015
Applicant:
CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING
Inventors:
Qiang WU, Bo LI, Shouqiang LIU, Yifan ZENG
Abstract: The present disclosure relates to a simulated impact-type rock burst experiment apparatus comprising a bracket, a specimen box assembly, an X-direction, Y-direction and Z-direction loading mechanisms mounted on the bracket, and control systems. Loading mechanism comprises: four supporting posts in a rectangular arrangement, a first and second frames aligned with each other and fixedly connected to both ends of the four supporting posts, a loading hydraulic cylinder and a lead screw mounted on the two frames respectively. The present disclosure is able to load static and dynamic loads to the rock sample in three directions perpendicular with each other, thereby performing experimental method for simulating an impact rockburst. Furthermore, the structures of the three sets of loading mechanisms are substantially the same, which have good symmetry, therefore, it is more easily and accurately to control the operation for loading static or dynamic load to the rock sample.
Type:
Application
Filed:
March 31, 2012
Publication date:
June 18, 2015
Applicant:
China University of Mining & Technology (Beijing)
Abstract: A tension meter of an anchor rod with constant resistance and large deformation comprises a pull rod and a hollow jack (13). The meter further includes: a rotation device for controlling the rotation angle of the hollow jack (3); a lifter for adjusting the height of the hollow jack (13) and the rotation device; a first hydraulic pump (1) for driving the hollow jack (13), wherein the hollow jack (13) is fixed on the rotation device mounted on the lifter. The meter has a large measurement range and a high load capacity.
Type:
Application
Filed:
June 13, 2011
Publication date:
October 30, 2014
Applicant:
CHINA UNIVERSITY OF MINING & TECHNOLOGY (BEIJING)
Inventors:
Manchao He, Zhibiao Guo, Jiong Wang, Jun Yang, Xiaoming Sun
Abstract: A constant-resistance and large deformation anchor cable and a constant-resistance device are provided. The constant-resistance and large deformation anchor cable comprises cables (7), an anchoring device (13), a loading plate (12) and clipping sheets (4). The upper end of cables (7) is fixed on the anchoring device (13) and the loading plate (12) by clipping sheets (4). The constant-resistance and large deformation anchor cable also comprises a constant-resistance device, and the constant-resistance device comprises a sleeve (8) and a constant-resistance body (5). The sleeve (8) is a straight tube. The constant-resistance body is conical, and the diameter of the lower end of the constant-resistance body is bigger than the diameter of the upper end of the constant-resistance body. The inner diameter of the sleeve (8) is smaller than the diameter of the lower end of the constant-resistance body.
Type:
Application
Filed:
June 13, 2011
Publication date:
August 14, 2014
Applicant:
CHINA UNIVERSITY OF MINING & TECHNOLOGY (BEIJING)
Inventors:
Manchao He, Zhigang Tao, Bin Zhang, Xiaojie Yang
Abstract: A system and method for testing gas migration process in the coal and rock mass are disclosed. The method includes the following steps: selecting a cylindrical coal sample, applying an axial pressure and a radial pressure to the coal sample under a sealing state, and/or increasing temperature, to desorb gas absorbed by the coal sample; guiding the gas desorbed from the coal sample by a guiding passage, detecting gas flow rate and pressure, analyzing gas composition and content, and achieving a data statistics. The method provides a theory and data basis for researching the forming and occurring process of gas outburst accident in coal mine. The system is simple and easy to use, and is suitable for migration research of the gas absorbed in the deep coal-rock mass.
Type:
Grant
Filed:
July 15, 2010
Date of Patent:
April 16, 2013
Assignee:
China University of Mining & Technology ( Beijing)
Inventors:
Manchao He, Chunguang Wang, Haijiang Zhang, Dejian Li
Abstract: A system and method for testing gas migration process in the coal and rock mass are disclosed. The method includes the following steps: selecting a cylindrical coal sample, applying an axial pressure and a radial pressure to the coal sample under a sealing state, and/or increasing temperature, to desorb gas absorbed by the coal sample; guiding the gas desorbed from the coal sample by a guiding passage, detecting gas flow rate and pressure, analyzing gas composition and content, and achieving a data statistics. The method provides a theory and data basis for researching the forming and occurring process of gas outburst accident in coal mine. The system is simple and easy to use, and is suitable for migration research of the gas absorbed in the deep coal-rock mass.
Type:
Application
Filed:
July 15, 2010
Publication date:
May 17, 2012
Applicant:
CHINA UNIVERSITY OF MINING & TECHNOLOGY (BEIJING)
Inventors:
Manchao He, Chunguang Wang, Haijiang Zhang, Dejian Li