Strong resistance and strong evasion floor heave governing construction method of high-stress large-deformation soft rock drift

Abstract

The invention discloses a strong resistance and strong evasion floor heave governing construction method of a high-stress large-deformation soft rock drift, belonging to the technical field of coal mine drift support. The strong resistance and strong evasion floor heave governing construction method is designed for solving the problems of large deformation and difficult support of the floor heaves of coal mine soft rock drifts. Certain depth is firstly dug downwards on a drift soleplate from a designed elevation, and then, a high strength deformed steel bar anchor rod, a grouting anchor rod, a steel beam and a concrete layer are used for supporting the drift soleplate to form a strong resistance supporting structure, a layer of aerated rubber air bags containing rubber granules is paved on the strong-resistance supporting structure, the air bags are used as strong evasion devices to release the pressure of the soleplate and buffer the deformation of the floor heave, and finally, a layer of reinforced concrete is poured on the rubber air bags to control the floor heave of the high-stress large-deformation soft rock drift. According to the invention, resistance is combined with evasion, the construction technique is simple, the construction speed is high, the repair rate low, the method is generally suitable for governing the floor heaves of various kinds of coal mine drifts and chambers, and the engineering practicability is strong.

Description

technical field [0001] The invention relates to a construction method for treating the bottom of a deep well roadway, in particular to a construction method for treating the bottom of a high-stress and large-deformation soft rock roadway with strong resistance to strength, and belongs to the technical field of coal mine roadway support. Background technique [0002] In deep mine mining, due to the influence of high stress and rock mass engineering properties, the stability control of large deformation soft rock roadways has become an urgent problem to be solved. The situation of large deformation and difficult support of deep roadways is becoming more and more serious. Main characteristics and manifestations of deformation and failure of high-stress soft rock roadway. A large number of engineering practices have shown that in deep mining without floor support, the amount of undercut in the roadway accounts for about 70% of the total movement of the roof and floor of the road...

AI Technical Summary

Problems solved by technology

[0004] Practice shows that the existing bottom swell treatment methods often fail in high-stress soft rock roadways with a large amount of bottom swell, and the consumption of materials is large, the cost of support is high, the construction process is complex, the amount of engineering is large, the construction speed is slow, and the repair rate is high , the bottom sag problem of high-stress soft rock roadway in deep wells has not been effectively solved, and the phenomenon of roadway scrapping due to serious bottom sag occurs from time to time, which seriously restricts the healthy and sustainable development of deep mine mining. Therefore, it is necessary to invent a new The high-stress and large-deformation soft rock roadway has strong anti-strength and let the bottom sag treatment method to effectively control the bottom sag of the high-stress soft rock roadway

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