This work uses a combination of simulations performed via numerical models and field observations studied the attenuation deep-hole blasting stress waves evolution mechanism cracks in jointed rock mass. First, we conclude that larger joint angle is, is transmission coefficient smaller fractal dimension. Second, time difference between peak maximum principal on both sides hole horizontal directi...

A methodology for determining overbreaks in hard rock tunnel construction using the drill-and-blast technique is presented this paper. The was developed and applied to crystalline medium- thick-bedded limestone, but it can be used any jointed mass. Overbreaks are inevitable tunnelling a low-confinement environment (shallow tunnels up several hundred meters deep) as result of wedge failures alon...

Drilling and blasting play a very important role in driving the economy of opencast mines, as various mining activities related to strata handling are dependent on size rock mass created due blasting. Thus analysis fragments from explosion is essential order monitor its compatibility with deployed machineries/HEMMs (such shovel, dumper, dragline, etc.). As over fragmentation well under both ten...

The microseismic signals of coal and rock fractures collected by underground sensors contain masses blasting vibration generated mine blasting, the waveforms two are highly similar. In order to identify true with a monitoring system quickly accurately, this paper proposes lightweight network model that combines convolutional neural (CNN) transformer, named CCViT. Of these, CNN is used extract s...

Adhesion strength of exterior or interior coating of steel pipes is too important. Increasing of coating adhesion on surfaces can increase the life time of coating, safety factor of transmitting line pipe and decreasing the rate of corrosion and costs. Preparation of steel pipe surfaces before doing the coating process is done by shot and grit blasting. This is a mechanical way to do it. Some e...

Seismic techniques, which are known as nondestructive geophysical methods, are commonly used by engineers working in various fields such as mining, civil, and geotechnical engineering. They are frequently employed to investigate certain properties of rocks. Ultrasonic measurements can be applied in various application areas such as rockbolt reinforcement1, blasting efficiencies in the rock mass...

Considering the fact that rocks fail faster under tensile stress, rock tensile strength is of greatimportance in applications such as blasting, rock fragmentation, slope stability, hydraulic fracturing,caprock integrity, and geothermal energy extraction. There are two direct and indirect methods tomeasure tensile strength. Since direct methods always encompass difficulties in test setup, indire...

This article aiming at the lack of research on influence rock clamp production cutting blasting under high in-situ stress conditions and damage criteria for RHT constitution in numerical simulation. Combined with critical criterion embedded function constitution, determining constitutive was studied, mechanical parameters Metamorphic sodium lava were substituted to obtain threshold The smooth p...