The combined peak particle velocity (PPV) and frequency safety criterion for blast vibration is widely used in blasting engineering. ... blast-induced ground vibration focused on establishing empirical allowable ground vibration levels in terms of either ... seismic waves plays an important role in situations of a small distance from an ...
The axial vibration of buried pipeline allowable strain value is shown in Table 1. Table 1. Allowable tensile strain (GB50470-2008, 2009) ... Explosive and blasting distance on pipeline safety ...
Summaries of the PPV limits of the most important standards worldwide can also be found in the CVDG Pro's Reference chapter and in the Reference section of the Vibrationdamage.com Ground Vibration PPV and Safe Distance Calculator, which includes a construction vibration calculator and two different blasting vibration …
In the area with overlying soil layer, the safe allowable distance of blasting vibration safety can be appropriately reduced to increase the land utilization rate, which has important reference value for the blasting design and safety prediction of deep rock mass. ... In the area with overlying soil layer, the safe allowable distance of ...
The effect range of rock breaking-induced vibration can be obtained through the attenuation curve of peak particle velocity (PPV) with distance and allowable blasting vibration safety threshold (for general buildings, the allowable PPV is less than 25 mm/s in China) (Liu and Huang 2019; Kumar and Mishra 2020).
According to the "Blasting Safety Technical Regulations" (GB6722–2014), the safety standards allowable for blasting vibrations in traffic tunnels are presented in Table 4: Table 4. ... With the increase of the blast center distance, the vibration velocity law diverges, and the vibration velocity in all directions with the increase of the ...
An increase in the blast load causes a significant increase in the fracture area, residual stress and lateral displacement caused to the tunnel by the action of blast load. The standoff distance ...
Ground blast vibrations always cause cosmetic and structural damage and pose a nuisance to residents (Wang et al. 2023).Various prediction models, safety standards and criteria have been proposed to determine the potential for structural damage induced by ground vibrations (Yan et al. 2020).For instance, the scaling law for ground …
The charge weights per delay corresponding to this le vel of vibration for a distance of 1.0 km and 1.5 . ... [Show full abstract] presented how the seismic safety of blasting works is checked ...
Blasting vibration-distance relationships are usually depicted differently in scientific contexts than other kinds of construction vibration. The diagram below, depicting actual blasting vibration data from a construction project involving leveling and terracing of a planned housing development area on a volcanic rock site, shows how blasting …
By the end of the 1980s, most Chinese experts started to conduct more studies on blasting-vibration frequency and structure response. According to types and quality of different structures, and their sensitivity to ground vibration, Wu and Tang (Wu and Ye 1997; Tang et al. 2001) established a classification for buildings, and divided the …
The allowable particle vibration speed standard for blast ing vibration safety of permanent rock high slope in the Blasting Safety Code (GB6722-2014) is 𝑓 < 10 Hz, 𝑣 = 5-9 cm/s,
The allowable particle vibration speed standard for blasting vibration safety of permanent rock high slope in the Blasting Safety Code (GB6722-2014) is f < 10 Hz, v = 5-9 cm/s, ... where R is safety allowable distance of blasting vibration (m). Q is explosive quantity (kg). Simultaneous blasting is the total charge, and delayed blasting …
Combined with the circumferential allowable stress control criterion of the pipeline, the safety control standard of the blasting vibration velocity of the HDPE water supply pipeline under different …
Measuring the blast-induced ground vibration at blasting sites is very important, to plan and avoid adverse effects of blasting in terms of the peak particle velocity (PPV). However, the measurement of PPV often requires time, cost, and logistic commitment, which may not be economical for small-scale mining operations. This has …
The research results show that the safety allowable distance of blasting vibration is 30.0 m for 120 mm blasthole. The safety allowable distance of blasting shock wave is about 193 …
The distance between the upper and lower step excavation surface is 5 ∼ 10 m to avoid the superposition of blasting vibration as much as possible and reduce the blasting vibration hazard. In this paper, the blasting excavation of the upper bench tunnel is studied and analyzed. ... it is obtained that the blasting safety allowable vibration ...
tests are performed to determine changes in the peak blasting vibration velocity based on the blast distance and free surface area. LS-DYNA is used to establish tunnel blasting excavation models under
This paper presents some basic procedures for avoiding vibration damage to residences when blasting. Particle velocity of the ground near the residence is presented as the …
Therefore, to elevate personnel safety and also protection of nearby structures against harmful effects of this phenomenon, blasting operation should factor in allowable limits and safe thresholds. Some regulations have been established by different researchers to form damage scales that are fundamentally based on peak particle …
The range of the allowable blasting vibration velocity of different classes of rock mass is proposed according to the mechanism of shallow landslide. ... The safety threshold of blasting vibration ...
According to the "Technical Regulations on Safety of Blasting Vibration in Railway Engineering" TB10313-2019, the allowable safe range of blasting vibration velocity in railway tunnels is 5–8 cm/s. ... The monitoring report shows that the blasting distance corresponding to Measuring Point 3 was the smallest, and the blasting …
Furthermore, by analyzing the relationships between blast-induced dynamic displacements, dynamic strains, and PPV, as well as determining permissible dynamic displacements and dynamic strains for support structures, a methodology was proposed to establish allowable safety vibration velocity standards for TSL support structures. This …
The current Blasting Safety Regulations (GB 6722-2014) stipulate that different safety criteria should be used to evaluate the vibration effects of blasting on different types of buildings (structures), …
be expected to increase as the distance to the blast becomes smaller. When the distance between the recording point and the blast becomes large enough, there is little the blaster can do to alter the frequency of the vibration. The greater the distance from the blast, waves that have traveled different paths arrive at different times and overlap.
The results show that the circumferential compressive strain of the HDPE pipe is the most affected by blasting vibration, and the pipe with the shortest blasting …
Table 6.3 Safety limitation of blasting vibration in China (GB6722 ... When the explosives charge of one blast do not exceed 25 kg in surface blasting, the safe distance between the charge and the …
Francini R [ 104] studied the vibration velocity response of buried pipelines under the action of mining blasting in nearby pipelines, established the relationship …
Among the three directions of ground surface vibrations, the energy decay was the most significant in the x-direction (tunnel excavation direction), which amounted to …
This paper proposes a system for evaluating safety as it relates to blasting vibration. The system applies the Hilbert–Huang transform (HHT) energy analysis …