Asymmetric supporting device of gob side entry

Abstract

The invention discloses an asymmetric supporting device of a gob side entry. The asymmetric supporting device comprises an upright supporting steel plate, curve-shaped spacer bands, an upper supporting steel plate, a lower supporting steel plate, anchor cables, anchor rods and anchor rod fixing components, wherein the curve-shaped spacer bands are fixedly arranged on two gob side entry sides of the gob side entry. By the asymmetric supporting device of the gob side entry disclosed by the invention, the safety and stability of gob side entry supporting are improved well; by arranging the waved curve-shaped spacer bands, the gob side entry sides can be supported well, and the supporting stability of the gob side entry sides is improved; meanwhile, the anchor rod fixing components are arranged, and each anchor rod fixing component is in a form of a hinged link rod; the link rods use straining blocks to strain the anchor rods, and grouting is performed on fixed grouting slots; a steel wire net is arranged, so that the link rods can be fixed well by grouting, and the fixing effect of the anchor rods is improved well. The asymmetric supporting device of the gob side entry disclosed by the invention is novel in design, independent in structure, and capable of improving the supporting stability and safety of gob side entry asymmetric support in a maximum extent.

Description

technical field [0001] The invention belongs to the field of coal mine mining, in particular to an asymmetric support device for a gob-side roadway, and belongs to the technical field of coal mine roadway support. Background technique [0002] With the increasing demand for coal, the shallow coal resources are depleting day by day, and the mining depth increases year by year. The stress state of the roadway in the deep surrounding rock is very different from that in the shallow part, and the geomechanical environment of the surrounding rock of the roadway is more complicated. The structure of the surrounding rock is asymmetrical. In addition to the effect of high ground stress, most of the roadway surrounding rock is in an asymmetric stress state, and the surrounding rock is asymmetrically deformed and damaged. At this time, the conventional symmetrical support concept is adopted. can no longer meet the requirements. The existence of the local high stress area makes this pa...

AI Technical Summary

Problems solved by technology

[0003] However, the current asymmetric support structure still has many unreasonable features. For example, after the support of anchor rods and anchor cables, due to asymmetry, it is easy to cause asymmetric stress on the anchor rods and anchor cables, resulting in individual anchor rods and anchor cables are loose, threatening the safety of roadway support along the gob

In addition, the anchor rod and anchor cable are relatively cumbersome during the construction process, which affects the support efficiency and support effect.

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