Energy-absorption type impact-resistant tunnel cross-section hydraulic support

Abstract

An energy-absorption type impact-resistant tunnel cross-section hydraulic support comprises an energy-absorption impact-resistant top beam, side protection side beams, an energy-absorption impact-resistant floor-heave-resistant bottom beam and anchoring force energy-absorption impact-resistant hydraulic supporting columns. Energy-absorption impact-resistant back plates with interlayer structures are distributed on the upper surface of the energy-absorption impact-resistant top beam, and therefore the local or large-area rock impact effect borne by the top beam can be relieved; the rising, falling and overall deforming of the support top beam are reasonably guided by the side protection side beams, the support top beam is prevented from collapse caused by unbalance loading or the thrust effect in the third direction, wall caving can be prevented, and the hydraulic supporting columns inside the support are protected; buffering time is provided for opening of a safety valve through the anchoring force energy-absorption impact-resistant hydraulic supporting columns, the safety valve is prevented from instant impact damage, and the impact resistance and the safety coefficient of the hydraulic supporting columns are increased; under the common effect of carbon fiber fabric and impact blocks of the energy-absorption impact-resistant floor-heave-resistant bottom beam, energy-absorption blocks are damaged and deformed to recede, and therefore the impact kinetic energy of the bottom plate surrounding rock is rapidly absorbed, and the impact effect borne by a bottom beam body is relieved.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety support, in particular to an energy-absorbing impact-resistant roadway section hydraulic support. Background technique [0002] Rock burst is one of the most serious dynamic disasters in coal mine production. At present, there are more than 140 pairs of mines that have experienced rock burst in my country, and with the increase of coal mine mining depth and the continuous expansion of mining intensity, the degree of damage to rock burst has become more prominent, and some mines have even experienced rock bursts. The combined disasters of ground pressure, gas outburst, and spontaneous combustion have brought serious economic losses to the coal industry, and also caused a large number of casualties. [0003] In the prevention and control measures of rock burst, support is the most direct barrier to face the risk of impact and prevent the instability and destruction of surrounding rock, and ...

AI Technical Summary

Problems solved by technology

Including the current anchor rod (cable) support, shotcrete support, steel shed support, and portal hydraulic support, etc., are all based on static analysis and are not designed for dynamic problems such as rock burst , it does not have the characteristics of rapid pressure yielding and energy absorption under impact, so only increasing the support strength and increasing the support density to enhance the impact resistance does not fundamentally solve the problem of roadway anti-scour support

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