Rock burst prevention steel structural part roadway support shrinkage structure

Abstract

The invention discloses a rock burst prevention steel structural part roadway support shrinkage structure. The structure comprises a curve structure and a straight line structure, wherein the curve structure and the straight line structure are both connected with first connecting pipes and second connecting pipes; the first connecting pipe and the second connecting pipe in the curve structure are both arched; the first connecting pipe and the second connecting pipe in the straight line structure are both straight lines; the first connecting pipes and the second connecting pipes are rectangular or circular; the cross sections of the first connecting pipes and the second connecting pipes are respectively provided with opposite left and right sides and opposite upper and lower sides; the first connecting pipes comprise first connecting pipe bodies, middle sections and wrapping sections integrally connected in sequence; when the first connecting pipes and the second connecting pipes are arched, the middle sections are called as arched sections; and in a roadway support with the shrinkage structure, the shrinkage quantity is set according to the pressure value magnitude of a roadway. The local or whole shrinkage of the whole support is realized through the shrinkage of the shrinkage structure to relieve or absorb the pressure of the roadway in each direction.

Description

technical field [0001] The invention relates to the field of mine support equipment, in particular to a tunnel support retractable structure used in deep wells, tunnels with rock bursts, and large-section tunnels. Background technique [0002] With the long-term rapid growth of the global economy, especially the domestic economy, a large amount of coal and various mineral deposits buried in the shallow strata have been exploited, so the mine mining gradually extends to the depth of the stratum below 800 or 1000 meters. With the increase of roadway support problems such as deep wells, rock bursts, and large sections, etc. have appeared. [0003] At present, the main roadway support used for mine roadway support is made of various types of U-shaped steel, I-beam, channel steel and other profiles, including a new type of support, the name is poured concrete-filled steel pipe support ( Partial mine use in 2014). [0004] Because they are all made of profiles, if you want to in...

AI Technical Summary

Problems solved by technology

Although this type of roadway support makes up for the shortcomings of the weak supporting force of the roadway support made of profiles, it gradually shows many shortcomings in the process of use: the anti-shock ground pressure hydraulic roadway support is arranged horizontally in the roadway, due to its The structure itself is not perfect, there is no support for the side of the roadway side pressure, no continuous support for the cross-section of the roadway, and the stability of the support is insufficient; the hydraulic support of the shed lifting beam is arranged longitudinally in the middle of the roadway, and strengthened under the U-shaped steel support The supporting function of U-shaped steel cannot be supported alone, and the roadway is divided into two, which affects the laying of roadway equipment

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