To optimize the length-diameter ratio of the impact test specimen under three-dimensional static combination conditions,five mixed granite specimens with different length-diameter ratios(diameter 50 mm,length 30 mm,40 mm,50 mm,60

In practical engineering,rock tensile failures usually occur under impact loads,which is obviously different from its mechanical properties under static loads.Therefore,it is necessary to study the dynamic tensile properties of ro

In order to study the influence of weak interlayer parallel to the blast hole on rock blasting crack propagation,blasting simulation experiments was carried out by pouring cement mortar test blocks with 40 cm×40 cm×36 cm in length

The interface between the inclusion and the medium is not always perfect.That is,the displacement and stress are not continuous and equal on the boundary.The dynamic response of an incident P wave at an imperfect interface is diff

At present,the analytical solutions of tunnel dynamic response under blasting disturbance are mostly steadystate.However,the actual blasting disturbance propagates in engineering construction are in the form of transient wave,and

To treat the tendency term and high-frequency noise of blast vibration signals,a signal processing method based on the CEEMDAN decomposition and the wavelet threshold has been introduced.First of all,a group of IMF components is o

When underwater explosions with different explosive equivalent are conducted near water surface,bubble movement has certain effect on water surface morphology.Thus,the formation of water spike of free surface,which is critical to

Abstract: The influence of blasting construction of new tunnel on the side wall a large-section underground cavern on the stability of adjacent underground caverns is the purpose of this research.Based on the water diversion proje

As a new type of tunnel,a double-arch tunnel is connected by two arches without a middle wall.And too small a distance between them leads to a situation that the blasts in the subsequently excavated tunnel inevitably affect the su

In tunnel construction by drilling and blasting method,the energy generated by explosive inevitably disturbs the surrounding rock.Therefore,the control of surrounding rock damage is very important to the safety and stability of th

Burn cut blasting with uncharged holes was adopted in a large-section tunnel project of Etihad Railway in the United Arab Emirates to ensure timely completion of the construction with a high standard.Engineering mathematical model

In tunnel driving blasting,the construction technique of replacing the stemming material or charge decks with water is also called water pressure blasting.The development of charge structure in tunnel blasting can be divided into

The excavation quality and progress control of slope protection layer of dam shoulder groove is of great significance to realize the safe and efficient construction of hydraulic engineering.In view of blasting excavation of the sl

Research on blasting process plays an important role in reducing mine costs and improving mine benefit.However,field industrial tests have the drawbacks of long period,large workload and high cost.Moreover,blasting simulation soft

During bench blasting in open-pit mines,the surface profile of the muckpile and the movement trajectory of the internal particles are important influencing factors for precision mining in open-pit mines,especially for ore bodies w

In the practice of gas control engineering in coal mine,pre-split blasting is one of the effective measures to improve the permeability of low-permeability coal seams,and its effect depends on the generation and expansion of blast

Taking the controlled blasting engineering of subgrade of a construction project as the research background,the blasting parameters and safety protection measures are designed to eliminate the potential safety hazards caused by bl

The problem during the overall scheme of bidirectional fold implosion technology is the lack of calculation basis for selecting key parameters.Thus the quantitative design method of folding blasting plan is studied.Firstly,a multi

A highway viaduct is a double-line reinforced concrete structure,and the bridge deck width of a single-line is 12 m.The northern section and the southern section of the bridge approach and the main bridge have 6 piers(pier number

The stress wave induced by CO2 phase transition can be used to generate rock fractures.It is important to investigate the propagation and influence law of this stress wave.Based on the self-developed triaxial strain testing device

Coal seams in China have many features，such as low permeability，high gas pressure and large gas content，so it is extremely difficult to extract gas from the original coal seam.The permeability has to be increased in order to impro

In order to study the blasting vibration characteristics of single-base gun propellant,blast experiments of single-base gun propellant and emulsion explosive were conducted.The attenuation law and energy spectrum distribution of t

In this paper,the penetration behaviors of 4.6 mm thickness armor steel under different projectile velocities of type 537.62 mm common steel core bullet were studied by computer simulation analysis.The anti-ballistic performance p

Jinwu Bridge is located in Jinhua,Zhejiang Province,which is an important transportation hub spanning three districts with large blasting workload and complex surrounding environment.In order to guarantee the safety of explosives

The safety control standard of blasting vibration of high-voltage transmission tower is still not clear,which makes it difficult to guide the construction.Based on a highway tunnel under construction,this paper designs the blast h

In order to study the influence of a complex filling body on the propagation characteristics of blasting seismic waves,blasting vibration data have been recorded on the monitoring points placed in the stopes on both sides of a fil

In order to study the anti-explosion stability of a long-span underground chamber under the influence of multiple factors,simulation using FLAC3D,based on model tests,was conducted by changing the parameters of explosion strength,

The influence of impact loading generated during the excavation blasting process on a buried gas pipeline near the blasting source has been widely concerned as a major safety issue in the engineering construction of an urban under

Flyrock is one of the most hazardous events in open-pit mine blasting operations.At present,the flying distance of flyrock is mainly predicted by several empirical formulas.However,due to the great difference between different eng

It is known that the safety management level of blasting operation units during the whole life cycle of purchasing,transporting,using and storing civil explosives still needs to be effectively improved,and the intrinsic safety man

New internet technologies such as the internet of things and big data are playing a significant role in achieving the comprehensive and deep interconnection of all factors of production safety.Risk management has also received sus

In order to solve the game problem between the insurance demand of civil explosive production enterprises for transferring high risks and the declinature from insurance companies,the revised risk analysis method of operating condi