Horizontal goaf multi-row group column tensile capacity testing device and method
A capacity test and goaf technology, applied in the direction of measuring devices, using stable tension/pressure testing material strength, instruments, etc., can solve the problem of inability to load coal pillar specimens in group pillars and difficulty in the overall bearing capacity of stope group pillars Realization and other issues
Active Publication Date: 2021-06-04
TAIYUAN UNIV OF TECH
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- Application Information
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Problems solved by technology
At present, it is difficult to monitor the overall bearing capacity of the stope group pillars on site, and it can only be tested by small-sized group pillar coal pillar specimens in the laboratory.
The traditional testing machine can only load a single coal pillar specimen, but cannot load a group of coal pillar specimens
Method used
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Embodiment 1
[0038] like Figure 1~6 As shown in the figure, a test device for the tensile capacity of multi-row columns in horizontal gobs includes: a testing machine base 1, a frame 2, a lower loading jaw 3, an upper loading jaw 4, an upper pressing plate 5, a workbench 6, and a horizontal frame 7. Force control device 11, protective ring 12, hemispherical seat 13, upper pressure plate 14, directional bearing 15;
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Abstract
The invention discloses a horizontal goaf multi-row group column tensile capacity testing device and method. Four protection rings are arranged at the four corners of a testing machine base, a rack is installed in each protection ring, the bottoms of the racks are connected with the testing machine base, the tops of the racks are connected with a transverse frame, and the lower portion of the transverse frame is connected with a plurality of force control devices; the force control device comprises a pressure sensor, a hydraulic oil cylinder and hydraulic push shafts, and each hydraulic push shaft is connected with one upper pressure plate; the pressure sensor is arranged above the upper pressure plate; five rows of lower loading jaws are evenly arranged on the workbench, upper loading jaws are arranged above the lower loading jaws in a matched mode, the upper loading jaws and the lower loading jaws are connected through directional bearings, and an oval cavity is formed inside after the upper loading jaws and the lower loading jaws are buckled and used for containing a test piece and preventing the test piece from bearing eccentric loads. According to the invention, uniform and non-uniform load loading of multiple groups of columns can be realized through a plurality of hydraulic push shafts, and the tensile capacity of a multi-group column system is researched.
Description
technical field [0001] The invention relates to a device and method for testing the tensile capacity of multi-row group columns in a horizontal goaf, which is mainly suitable for synchronous loading of multiple coal, rock, filling body, concrete, coal-filling, rock-coal filling pillar test pieces The invention and method belong to the technical field of mining rock mechanics test. Background technique [0002] Due to the backwardness of the mining methods in the old mining period, a large number of coal pillars have been formed in many mines in my country, mainly including: knife column coal pillars, room pillar coal pillars, strip coal pillars, and short wall coal pillars Coal pillars, roadway-mined coal pillars, storehouse-style coal pillars, jump-mined coal pillars, etc., are densely distributed in space, have different shapes, interact with each other, are intricate and of different sizes, and form coal pillars in the form of communities. column group. Similarly, pillar ...
Claims
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IPC IPC(8): G01N3/10G01N3/02
CPCG01N3/10G01N3/02G01N2203/0017G01N2203/0048G01N2203/0252
Inventor 史旭东白锦文王凯杜献杰冯国瑞崔博强
Owner TAIYUAN UNIV OF TECH