Study On Computer Algorithm For Key Parameters Of Railway Tunnel Blasting Scheme

China mostly adopts drilling and blasting construction technology in tunnel construction,and the current blasting scheme is designed based on experience combined with site conditions,and the next blasting scheme is adjusted according to the blasting effect,so as to optimize the scheme.However,the blasting design scheme is often affected by the personal experience of the engineer,and there are many subjective factors to intervene,which is difficult to form an objective and accurate blasting design scheme,resulting in the poor blasting effect of the blasting scheme,serious over-under-digging,and low energy utilization rate of explosives.Therefore,in order to realize the computer intelligent design of the blasting scheme,it is necessary to optimize the blasting scheme design algorithm.This paper studies the theoretical calculation of holes arrange in tunnel blasting schemes,and uses C# language combined with WPF and MVVM frameworks to develop tunnel blasting scheme design software on Visual Studio platform.The main work carried out in this article is as follows:(1)The equivalent load of blasting was studied,and the equivalent method of blasting load was derived theoretically based on the Saint-Venant principle for the equivalent blasting load in the past,and the calculation formula of equivalent load was determined.The numerical simulation method is used to compare the direct load application in the blast hole,the past equivalent load application method and the improved equivalent load application method in this paper,and it is found that the calculation method in this paper is more accurate than the previous algorithm.The attenuation process of stress waves applied to the hole wall is summarized,and the function of stress wave attenuation on the hole wall with time is determined.(2)The load decay process applied to the blasting hole is analyzed,and the function of stress wave attenuation on the gun hole wall with time is determined,which can provide important data for the calculation of hole wall load when grooving,photobursting and auxiliary holes are blasting schemes.(3)Aiming at the problem of calculating the blasting range of the grooved blasting cylindrical gun hole,according to the basic principle of spherical bag blasting funnel calculation,the blast funnel range of the columnar liquid bag is calculated by Starfield superposition algorithm by using the spherical liquid pack stress wave mechanics model.In the calculation process,the attenuation function of the stress wave with the propagation distance is introduced to obtain the blasting funnel range of the columnar medicine pack,which can provide a basis for checking the blasting failure range of the grooved hole.(4)In order to realize the computer-aided design of the blasting scheme,the calculation formula of the row spacing and hole spacing of the peripheral holes,grooved holes and auxiliary holes was derived.The geometric hole layout algorithm of gun hole arrangement is studied,and the graphic indentation algorithm of reasonable hole layout is proposed.A graphical tunnel layout scheme interface was developed.