Device and method for testing tensile capacity of inclined goaf under disturbance load of multiple rows of group columns

Abstract

The invention discloses a device and a method for testing the tensile capacity of an inclined goaf under a disturbance load of multiple rows of group columns. Four protection rings are arranged on a base of the device, a machine frame is installed in each protection ring, five rows of lower loading jaws located on the same center line are arranged on a lower sliding clamping seat, and variable-angle synchronous stretching of 1-25 test pieces can be achieved. According to the invention, synchronous loading of a plurality of coal, rock, filling bodies, concrete, coal-filling and rock-filling test pieces can be realized, the tensile capacity of the multi-row group column system of the inclined goaf under a disturbance loading condition can be obtained, and the mutual influence relationship among group column individuals of the inclined goaf can be obtained, a foundation is laid for revealing chain type instability response characteristics and mechanisms of the multiple rows of group columns of the inclined goaf under the disturbance influence, and guidance is provided for research and development of a chain type instability prevention and control technology of the multiple rows of group columns of the inclined goaf.

Description

Technical field [0001] The present invention relates to a multi-row of multi-ruin column disturbance load under inclined tilting regions, mainly adapted to multiple coal, rock, filling body, concrete, coal-charge, rock - filling synchronous loading Device and method belong to the field of mining rock mechanics test technology. Background technique [0002] Due to the backwardness of the old timing mining, a large number of legacy coal columns formed in many mines in my country, mainly include: cutting column leggings, housing column leggings, strip legs, short wall legacy coal Columns, lane-like legs, warehouse legacy coal pillars, jump legacy coal pillars, etc., in the spatial intensive distribution, different forms, interaction, intricate and size, and combined with communities Column group. Similarly, in the metal mine mining, a mine column column is also formed in the hollow region to carry the jacket load and protect the long-term stability of the store. [0003] Filling min...

AI Technical Summary

Problems solved by technology

At present, it is difficult to monitor the overall bearing capacity of stope group columns on site, and can only rely on small-sized group column samples in the laboratory to test

Traditional testing machines can only load a single column sample, but cannot load a group of column samples

In actual engineering, the coal seam usually has a certain inclination angle and is not distributed horizontally. Therefore, it is very necessary to study the bearing capacity of the column group system at variable angles. However, the traditional testing machine cannot study the single-axis bearing capacity of the column group system at variable angles.

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