Double-shaft static force-disturbance coupling inclined goaf group column bearing test device and method

Abstract

The invention discloses a double-shaft static force-disturbance coupling inclined goaf group column bearing testing device and a double-shaft static force-disturbance coupling inclined goaf group column bearing testing method. The device can realize variable-angle synchronous loading of 1-5 test pieces, four protection rings are arranged on a base, a rack is mounted in each protection ring, the bottom ends of the racks are connected with the base, the top ends of the racks are connected with a transverse frame, sliding rails are arranged on the two sides of the base, side frames are mounted on the sliding rails through telescopic stand columns and pulleys, a vertical force loading device is arranged at the bottom of the workbench, transverse force loading devices are arranged on the inner sides of the side frames respectively, a force disturbance device is arranged at the bottom of the transverse frame, an upper sliding clamping base and an upper pressing disc are arranged above the sample, and a lower sliding clamping base is arranged at the bottom of the sample. Synchronous loading of a plurality of coal, rock, filling bodies, concrete, coal-filling and rock-filling test pieces can be achieved, the double-bearing loading capacity of the single-row group column system of the inclined goaf under the disturbance loading condition can be obtained, and the mutual influence relation between group column individuals of the inclined goaf is obtained.

Description

technical field [0001] The invention relates to a test device and method for the bearing capacity of a single row group column in a sloping goaf under the coupling action of biaxial static force and disturbance stress, which is mainly suitable for a plurality of coal, rock, backfill, concrete, coal-fill, rock-fill A device and method for synchronous loading of charging samples belong to the technical field of mining rock mechanics test. Background technique [0002] Due to the backward mining methods in the old mining period, a large number of leftover coal pillars have been formed in many mines in my country, mainly including: knife-pillar leftover coal pillars, room-and-pillar leftover coal pillars, strip-type leftover coal pillars, and short-wall leftover coal pillars Pillars, roadway mining type leftover coal pillars, warehouse type leftover coal pillars, jump mining type leftover coal pillars, etc. are densely distributed in space, have different shapes, interact with ea...

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 group column system under variable angles. However, the traditional testing machine cannot study the double-bearing bearing capacity of the group column system under variable angles.

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