Cutting construction method of high-strength rock-stratum maintain tunnel

Abstract

The invention provides a cutting construction method of a high-strength rock-stratum maintain tunnel. The method is characterized in that a microseismic blasting technology adopting presplitting smooth blasting is adopted to reduce the vibration fragmenting effect on lower bench rock mass caused by blasting so as to improve the yield rate, the rock mass is cut through a circular saw and a wire saw, and cut rocks are transported outside. The method has the advantages that the use of initiating explosive devices for in-tunnel explosive operations is reduced by performing the cutting of a high-strength rock-stratum maintain tunnel so as to reduce the dust generated by blasting construction, the vibration damage on a mountain is prevented, the goals of energy saving, emission reduction and resource saving are ultimately achieved, and rare and precious natural resources are ensured to be fully utilized while the engineering benefit is effectively improved.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a method for cutting and constructing high-strength rock formation mountain tunnels. Background technique [0002] At present, the environmental protection situation in our country is becoming more and more serious. In order to curb the excessive mining and deforestation caused by the mining of various economic stones, local governments strictly control the scale of quarry mining. Various types of raw materials, especially high-strength rare raw materials, are in short supply. my country is a mountainous country, and the mountainous area accounts for about two-thirds of the country's land area. [0003] According to the actual investigation, the rock cutting technology is generally seen in various stone mining areas at present, and its application in engineering is limited to some local open-air road cuttings and deep foundation pit excavations caused by blasting restrictions, ...

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Problems solved by technology

[0003] According to the actual investigation, the rock cutting technology is generally seen in various stone mining areas at present, and its application in engineering is limited to some local open-air road cuttings and deep foundation pit excavations caused by blasting restrictions, and some of them are used in tunnels. Partial use of sawing equipment for concrete cutting construction, these are measures taken to overcome some unfavorable factors in the construction process, there is no suitable cutting process in mountain tunnels aimed at mining stone

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