A mine-used frictional energy-absorbing anti-shock bolt

Abstract

The invention discloses a mining abdication friction-type energy absorption and impact prevention anchor rod, which belongs to the technical field of mining safety production support equipment, and is simple in structure, high in impact resistance and easy to use again after being repaired. The mining abdication friction-type energy absorption and impact prevention anchor rod comprises an anchor rod body and is characterized in that a corrugated pipe sleeves the anchor rod body; a non-corrugated section at the upper end of the corrugated pipe and a non-corrugated section at the lower end of the corrugated pipe are arranged at two ends of the corrugated segment of the corrugated pipe; a rod end stop block is arranged at the lower end of the anchor rod body, is in threaded connection with the anchor rod body and is arranged in the non-corrugated section at the lower end of the corrugated pipe; the size of the rod end stop block is greater than the inner diameter of the corrugated pipe; a fastening cable sleeves the non-corrugated section, in contact with the anchor rod body, at the upper end of the corrugated pipe; a tray sleeves the non-corrugated section, in contact with the rod end stop block, at the lower end of the corrugated pipe; a locking nut sleeves the non-corrugated section at the lower end of the corrugated pipe below the tray; and the locking nut and the non-corrugated section at the lower end of the corrugated pipe are in threaded connection.

Description

technical field [0001] The invention belongs to the technical field of support equipment for mine safety production, and relates to a support structure for high-stress rock mass, in particular to a relief friction type energy-absorbing anti-shock bolt for mines. Background technique [0002] Mine dynamic disasters such as rock burst and coal and gas outburst are major disasters encountered in the mining process, and the resulting impact damage to the roadway surrounding rock is one of the key issues affecting mine safety. Because of its advantages of convenient installation and low cost, bolts have always been widely used in roadway surrounding rock support equipment in mine safety production. [0003] With the gradual increase of the mining depth, the geological conditions become more and more complex, and the surrounding rocks of the roadway often show the characteristics of high stress and large deformation. Once the deformation of the roadway surrounding rock exceeds th...

AI Technical Summary

Problems solved by technology

[0003] With the gradual increase of the mining depth, the geological conditions become more and more complex, and the surrounding rocks of the roadway often show the characteristics of high stress and large deformation. Once the deformation of the roadway surrounding rock exceeds the range that the bolt can bear, accidents will occur due to the failure of the support equipment, which will pose a serious threat to mining safety and cause serious losses to the enterprise; in addition , in mining production, the use of bolts is very large, but most of the existing bolts are one-time support, which will not be able to continue to be used after the mine disaster, and in many cases, after the mine disaster, the roadway still needs to continue However, the bolts at this time can no longer be used, or due to the complex structure, it is not easy to replace parts, so we can only choose to replace all the bolts with new ones, or to re-excavate the roadway, which will inevitably lead to an increase in production costs.

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