Inclined goaf multi-row group column single-bearing load testing device and method under disturbance influence

Abstract

The invention discloses an inclined goaf multi-row group column single-bearing load testing device and method under disturbance influence. An upper sliding clamping seat and a lower sliding clamping seat of the device are semi-cylindrical blocks respectively, a plurality of positioning grooves located in the same center line are formed in the upper surface of the lower sliding clamping seat, and a plurality of coal pillar samples can be subjected to tensile capacity testing at the same time; the upper part of the upper sliding clamping seat is connected with the upper pressure plate; the lower sliding clamping seat is connected with the lower pressure plate; scale marks are arranged on the outer edges of the upper sliding clamping base and the lower sliding clamping base, the angle can be accurately adjusted and controlled, and fixing rings are arranged on the outer sides of the upper sliding clamping base and the lower sliding clamping base and used for being connected with the upper sliding clamping base and the lower sliding clamping base. Arc-shaped clamping blocks are arranged on the outer sides of the fixing rings, and the fixing rings are fixedly connected with the fixing blocks of the upper pressing disc and the lower pressing disc through the arc-shaped clamping blocks; the loading device is composed of a force control device and a force disturbance device. According to the invention, synchronous loading of a plurality of coal, rock, filling bodies, concrete, coal-filling and rock-filling coal column samples can be realized, and the single-bearing loading capacity of the inclined goaf multi-row group column system under the disturbance loading condition can be obtained.

Description

Technical field [0001] The present invention relates to a test apparatus and method for tilting a multi-row column uniaxial carrying capacity under the influence of disturbance, mainly adapted to a plurality of coal, rocks, filling bodies, concrete, coal-charge, rock-filling synchronization Loading equipment and methods 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...

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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