Discussion And Apply About Tunnel Controlled Blasting Technoligy

This paper aims at the rock tunnel diging by the blasting homework process, expatiating its key technique, combining combination different from fish mouth No.2 Railroad tunnel actually circumstance, aiming at geologic strata in tunnel characteristic and two tunnel close quarter constructions explode the result to influence and lights that blow up the parameters.Raised the principle to the rock blasting, the calculation method of amount of explosive is obtained. Explain plain noodles blasting, split the function principle blasting hi advance, the parameter is designed, medicine amount computing technology and plain noodles blaste various kinds of factors that result influence analyse.The design principle of explosive construction in tunnel and the blasting parameter are explained in detail in this paper. Combining the smoth blasting parameter and the design of blasting networking in tunnel, the explosive construction process in tunnel is describled. According to project geological condition, excavate section, excavate method , tunnel circulation footage , get into eyes machines and blasting apparatus ,etc. blasting! is designed, confirm porthole assign, figure, depth , angle, powder charge amount, powder charge structure, detonating method, detonating order, circulation homework, etc. rationally., in order to apply to practise in project.The cuthole construction is the key technology to the explosive construction in tunnel, which has an direct effect on explosive, cutting method not many kinds of not frank not empty, can overcome the restricted effects there aren't strabismus the cuttings, phenomenon of and the porthole of low utilization ratio. Yuhuai Railway Yuzui 2 No. single track railway tunnel, adopt vertical Tenneco cutting scheme; Luopanji highway tunnel, adopt one shape full of cracks cutting scheme, make better project result, realize the whole section first plain noodles blow up and excavate shaping.Though the controlled blasting construction have developed in decades years, but the overbreak and underbreak generated ground disturbance is still a long-term problem confusing tunnel construction, it explain by control of eyes not peripheral for this reason it blasting - blasting and not splitting not blasting and not lightenning plain noodles in advance blasting technology of control of vibration. Combine Yuzui 2 No. tunnel, Luopanji highway tunnel blaste and construct, among different kinds of country rock, through test and adjust constantly, flexible to use plain noodles is it blaste technology and control technology to blaste networking to control, better settlement is it is it dig to owe to exceed, country rock perturbation and tunnel stand side by side nearly interval homework blasting and interfering.