Adjustable double-resistance energy absorption anti-impact hydraulic support frame

Abstract

The invention belongs to the field of coal mine tunnel support technology, and relates to an adjustable double-resistance energy-absorption anti-impact hydraulic support frame, in particular to an adjustable double-resistance energy-absorption anti-impact hydraulic support frame applied to a coal mining area with deep impact ground pressure. The adjustable double-resistance energy-absorption anti-impact hydraulic support frame carries out abdicating and pressure relief through hydraulic safety valves under a static load condition and carries out abdicating and shock absorption through energy-absorption top beams under a dynamic load condition. The adjustable double-resistance energy-absorption anti-impact hydraulic support frame comprises a front top beam, a rear top beam, connection bodies and hydraulic support pillars, wherein the front top beam and the rear top beam are respectively composed of an upper box-type beam, a lower box-type beam, upper friction plates and lower friction plates, a plurality of the upper friction plates are vertically arranged at the lower end of the upper box-type beam, a plurality of the lower friction plates are vertically arranged at the upper end of the lower box-type beam, a plurality of through holes are formed in each upper friction plate, a plurality of second through holes are formed in each lower friction plate, fastening bolts are respectively arranged in the through holes and the second through holes, the hydraulic support pillars are arranged under the top beams, and the connection bodies are respectively arranged between two oil cylinders of the hydraulic support pillars at the same side of the front top beam and the rear top beam.

Description

Technical field [0001] The invention belongs to the technical field of coal mine tunnel support, and in particular relates to an adjustable double-resistance energy-absorbing anti-scour hydraulic support applied to coal mining areas with deep rock bursts. Background technique [0002] As my country's energy demand increases and mining intensity continues to increase, the excavation depth is getting deeper, and mines with a depth of several thousand meters are not uncommon. In the next few years, most mines will enter the deep mining stage. With the mining of deep mines, the unique mechanical properties of deep surrounding rocks and severe challenges to existing supports have emerged. The frequency and intensity of rock bursts have also increased, causing a large number of roadway support damage, collapse, and casualties. , Which seriously affected the safety production of coal mines. Therefore, the problem of deep working face mining roadway support to prevent rock burst has be...

AI Technical Summary

Problems solved by technology

[0005] Most of the current hydraulic supports use safety valves to relieve pressure, it is difficult to quickly give way to relieve pressure, and it is impossible to absorb the energy released in the process of rock burst in time

The existing energy-absorbing anti-shock abdication hydraulic support, its anti-shock energy-absorbing material has been subjected to a lot of pressure under static load and quasi-static load conditions, causing it to deform and absorb part of the energy, which greatly weakens its The energy absorption capacity at high-speed impact, so the existing hydraulic supports have limitations

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