MTW European Type Trapezium Mill
Input size:30-50mm
Capacity: 3-50t/h
LM Vertical Roller Mill
Input size:38-65mm
Capacity: 13-70t/h
Raymond Mill
Input size:20-30mm
Capacity: 0.8-9.5t/h
Sand powder vertical mill
Input size:30-55mm
Capacity: 30-900t/h
LUM series superfine vertical roller grinding mill
Input size:10-20mm
Capacity: 5-18t/h
MW Micro Powder Mill
Input size:≤20mm
Capacity: 0.5-12t/h
LM Vertical Slag Mill
Input size:38-65mm
Capacity: 7-100t/h
LM Vertical Coal Mill
Input size:≤50mm
Capacity: 5-100t/h
TGM Trapezium Mill
Input size:25-40mm
Capacity: 3-36t/h
MB5X Pendulum Roller Grinding Mill
Input size:25-55mm
Capacity: 4-100t/h
Straight-Through Centrifugal Mill
Input size:30-40mm
Capacity: 15-45t/h
influence of blasting noise
Vibration effect and ocean environmental impact of blasting
2023年1月1日 Considering the influence of the burial depth of tunnel blasting source, a mathematical prediction model of the attenuation law of underwater sound pressure in water Blasting operations can have unacceptable noise and vibration impacts if not conducted correctly Excessive levels of structural vibration due to ground vibration from blasting can cause Noise and vibration from blasting Department of Environment, 2023年9月1日 In this paper, the frequency spectra induced by blasting vibration under different delay times and distances are calculated, the frequency distribution and energy characteristics Frequency spectrum characteristics of blastinduced vibration with 2024年9月1日 In this paper, the propagation attenuation characteristics of blastinduced vibration (PPV, peak particle velocity) on different tunnel structures were systematically Attenuation of blastinduced vibration on tunnel structures
Assessment of the ground vibration during blasting in mining
2023年10月30日 One of the most severe environmental impacts of blasting is ground vibration, which also causes issues for individuals in the proximity of the blasting zone 62024年10月8日 Blasting vibration (BV) may cause the instability and damage to the surrounding structures and infrastructures, even leading to serious accident As far as slope blasting is Influence of the elevation effect of slope blasting on the vibration 2023年11月27日 The current study proposes a blasting vibration denoising method based on CEEMDANICA to alleviate the noise component in the blasting signals effectively The Denoising of blasting vibration signals based on CEEMDANICA2020年8月1日 Wang used monitoring instruments to assess the impact of blasting vibrations; the results revealed that blasting vibration influences the lining structure of existing tunnels during Influence of Blasting Vibrations Generated by Tunnel Construction
Noise from sandblasting The Journal of the AIP Publishing
1998年5月1日 For sandblasting, three different aspects that influence the noise exposure have been evaluated: (a) Noise from the nozzle and the blasting object, (b) noise generated by the 2023年1月1日 The priority detonation of cut holes can provide new free surface and space for rock fragmentation in subsequent borehole blasting, which affects the effect of smooth blasting and tunneling cycle advance (Agrawal et al, 2019), so the effectiveness of cut hole blasting is particularly important for obtaining a good excavation qualityVibration effect and ocean environmental impact of blasting 2019年11月16日 PDF In the blasting construction of new tunnels adjacent to existing tunnels, it is important to properly evaluate and control the influence of Find, read and cite all the research you need (PDF) Influence of tunnel blasting construction on 2020年8月5日 Ground vibrations are an integral part of the process of rock blasting The analysis of blasting vibration attenuation is the basis for a blasting risk assessment To study the influence of rock joints on the blasting vibration attenuation, an autoclaved aerated concrete block was used as a similar material of rock in model tests of blasting vibration propagation The Scale model test study of influence of joints on blasting vibration
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Influences of background noise on infants and children PMC
The goal of this review is to provide a highlevel, selected overview of the consequences of background noise on health, perception, cognition, and learning during early development, Influences of background noise on infants and children Lucy C Erickson Lucy C Erickson 1 University of Maryland, College Parklining due to adjacent blasting Some studies derived the basic influence mechanism of blasting adjacent to existing tunnels based on field monitoring and theoretical analysis (eg Hao et al, 2002;Influence of tunnel blasting construction on adjacent highway 2019年8月8日 Scientific Reports The Influence of Occupational Noise Exposure on Cardiovascular and Hearing Conditions among Industrial Workers Skip to main content Thank you for visiting natureThe Influence of Occupational Noise Exposure on Cardiovascular 2022年1月4日 Blasting is accompanied by a number of side effects that have a negative impact on the environment, such as ground vibration, flyrock, AOp, and backbreaks [33, 42]These effects are more severe if they are carried out in close proximity to residential buildings, factories, offices or if they are improperly designed []Proper designing of a blasting operation plays a An Overview of Blasting Operations and Possible Techniques to
Influence analysis of blasting on adjacent highrise buildings for
2022年6月8日 This paper focuses on an influence analysis of blasting of a deep rock excavation on adjacent highrise buildings in urban area, taking a foundation pit in Chongqing, China, as a case study Onsite monitoring tests are adopted to investigate the surface attenuation of blasting vibration and the dynamic response law of buildings under different conditions of the 2016年11月23日 21 Investigation, Including Photography and Surveying, of the Current Condition of All Facilities Within the Zone of Influence by Blasting All buildings, houses, structures, public utilities, railways, subways, and roads within the zone of influence by blasting should be investigated in situ, including photography and surveying, and record all information Blasting Assessment Report SpringerLink2014年3月30日 Vibrations generated by blasting carried out during the quarrying of material induce dynamic stresses that can give rise to damage of diverse considerations in surrounding buildings and structures The adverse effects of vibrations caused by explosives used in mining and civil works can be controlled by suitably planning blasting operations, appropriately Influence of depth and geological structure on the transmission 2011年1月1日 The blasting Engineer is, therefore, faced with the challenge of determining which rock mass properties most influence blasting performance in each situation and thereof deciding how blast designs Geological controls on drilling and blasting operations
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Attenuation model of tunnel blast vibration velocity based on
2021年10月26日 In tunnel blasting excavation, it is important to clarify the attenuation law of blast wave propagation and predict the blast vibration velocity effectively to ensure safe tunnel construction and 2021年3月3日 Through a tunnelblasting project, the effect of tunnelblasting vibration has been analyzed from the perspective of vibration energy transfer The nonlinear regression method was used to obtain the prediction equation for blast vibration velocity based on the field blast vibration data Then, the maximum charge per delay of the blasting construction of the tunnel was Research on vibration effect of tunnel blasting based on an 2020年8月1日 Download Citation Influence of Blasting Vibrations Generated by Tunnel Construction on an Existing Road Tunnel excavations are commonly carried out using the drill and blast method, which may Influence of Blasting Vibrations Generated by Tunnel2023年9月1日 And related studies have shown that blasting vibration frequency is also influenced by delay time [[24], [25], [26]]For example, Zhao et al [27] studied blastinduced vibration's time–frequency characteristics from energy distributionIt was indicated that the delay time directly affects the energy distribution of the vibration signals in different frequency bands, Frequency spectrum characteristics of blastinduced vibration with
Study on the Equivalence Transformation between Blasting
2024年3月7日 The evaluation of blasting vibrations primarily hinges on two physical quantities: velocity and acceleration A significant challenge arises when attempting to reference the two types of vibration data in relation to one another, such as different types of seismometers, noise, etc, necessitating a method for their equivalent transformation To address this, a 2023年11月14日 Used to evaluate the interaction and influence of relevant parameters to reduce uncertainty and to determine the influence of parameters on the overall system (Faramarzi, et al, 2014) Empirical and statistical analysis: Foundation Understanding The Risks of Flyrock in Mine and Quarry BlastingScale model test study of influence of joints on blasting vibration attenuation Chong Yu1,2 Haozhen Yue1,2 Haibo Li1,2 Xiang Xia1,2 Bo Liu1,2 Received: 25 September 2019/Accepted: CEEMDAN method, Gaussian white noise is added at each stage of the decomposition,and a uniqueresidue is computed to obtain each IMFScale model test study of influence of joints on blasting vibration 2020年4月20日 From blasting to downstream, processes are linked through the continuous reduction of the size of the rock The effect of blasting is traditionally limited to fragmentation, although effects on crushing and grinding are also recognized and examined in the paper Fragmentation prediction methods are reviewed to identify issues that need to be addressed in Analysis of the Effects of Blasting on Comminution Using Experimental
(PDF) Optimum Design of Nozzle Geometry of Dry Ice Blasting
2018年10月1日 Dry ice blasting has been used in the modern cleaning industry However, the primary disadvantage of dry ice blasting is high noise exposure At a high blasting pressure, the process reaches a 2018年10月25日 The primary operation in openpit mines is rock blasting In blasting, only 20%–30% of the energy produced by the explosives is converted into mechanical energy to fragment and displace the rock mass The remainder of the explosive energy is wasted in the form of blast disturbances, such as rock vibrations, noise, and fly rock, among othersAssessment of Blasting‐Induced Ground Vibration in an Open‐Pit 2024年6月30日 Tunnel excavation blasting operations often result in important negative impacts The negative effects of blastinginduced blast earthquakes, in particular the hazards caused by blast earthquakes to surrounding buildings and facilities, are receiving increasing attention and emphasis [1]Reducing the vibration hazards caused by blasting has been a research hot spotAnalysis of blasting vibration duration considering frequency and Request PDF On Mar 1, 2023, Mingnan Xu and others published Influence of the spatial distribution of underground tunnel group on its blasting vibration response Find, read and cite all the Influence of the spatial distribution of underground tunnel group
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Surface mineral workings: control of blasting govscot
2000年2月1日 Although the majority of energy generated within the atmosphere from any surface mineral blasting will be of a subaudible nature, there will also be a component that is audible, ie at frequencies greater than 20 Hz, and as such can be heard as noise and measured in terms of dB(A) see PAN 50 Annex A: The Control of Noise at Surface Mineral 2019年11月16日 In the blasting construction of new tunnels adjacent to existing tunnels, it is important to properly evaluate and control the influence of blasting vibration Influence of tunnel blasting construction on adjacent highway 2019年10月31日 The influence of the blasting excavation of the new tunnel on the existing tunnel below was found in the tunnel with a small clear distance up and down This paper mainly analyzed the vibration velocity, stress, and displacement of the Influence of Small, Clear Distance Cross‐Tunnel Blasting 2019年12月12日 Optimal values are shown for speech intelligibility expressed by the parameters C50 and U50, in the classroom with GA, as well as lower values of noise level during group activity, L Ngr, that is strictly related to reverberation timeIn contrast, noise level in silence, L Nsil, does not show decreased values in GA No such clear tendency is shown for the Frontiers Influence of Classroom Acoustics on Noise
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Denoising of blasting vibration signals based on CEEMDANICA
2023年11月27日 In order to effectively reduce the influence of noise in blasting vibration signals on subsequent analysis, this paper proposes a blasting vibration denoising approach by combining the CEEMDAN and 2023年2月28日 Sciencebased and accurate means for the evaluation of vibration caused by blasting are important for controlling hazards associated with blasting This paper proposes a system for evaluating safety as it relates to blasting vibration The system applies the Hilbert–Huang transform (HHT) energy analysis method combined with the signal energy ratio Safety Evaluation and Application of Blasting Vibration Based on 2009年7月1日 Request PDF Assessment of noise and ground vibration induced during blasting operations in an open pit mine — A case study on Ewekoro limestone quarry, Nigeria Our study was carried out to Assessment of noise and ground vibration induced during blasting 1998年5月1日 For sandblasting, three different aspects that influence the noise exposure have been evaluated: (a) Noise from the nozzle and the blasting object, (b) (without earplugs) is 97–107 dB with today’s most common equipment in Norway Noise from UHP‐water blasting can also reach levels up to 110–120 dB, Noise from sandblasting The Journal of the AIP Publishing
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Prediction of Tunnel Blasting Vibration Velocity
2023年1月20日 Tunnel blasting vibration has a negative impact on the surrounding buildings [1,2,3,4], and the reasonable prediction of vibration velocity can provide a theoretical basis for field charge designCurrently, the charge in 2024年1月12日 Underwater drilling and blasting techniques have been developed to overcome the challenges posed by various subaquatic operations, including marine construction, oil and gas exploration, and underwater mining, demolition, dredging and excavation, seismic surveys and marine research The drilling operation is followed by underwater blasting, which involves the Comprehensive review on principles and practices of underwater Article history: Received 21 March 2019 Received in revised form 14 May 2019 Accepted 9 June 2019 Available online 3 July 2019 The primary disadvantage of dry ice blasting (dib) is high noise emission The process may reach an alarming sound level of up to 130 dBA (safe noise exposure 85 dBA for eight working hours) at high blasting pressure(PDF) Influence of nozzle area ratio on the gasparticle flow for ASSESSMENT OF BLASTING NOISE ON FISH AND MARINE MAMMALS FROM EXPLOSIVES USED DURING BERTH EXPANSION AT BAE SYSTEMS, SCOTSTOUN Beaufort sea state 0, temperature of 8 ˚C, salinity of 33 PSU, and no influence of currents or ambient noise floor, ie worst case scenario signalpropagation conditions These conditions can, and do occur Assessment of Blasting Noise on Fish and Marine Mammals Form
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Analysis of vibration signals near ground surface during blasting
2024年9月19日 Characterization of engineering geological profile in field As shown in Fig 1, the stratigraphic conditions of the blasting vibration monitoring area near ground surface predominantly comprised 2020年8月5日 Request PDF Scale model test study of influence of joints on blasting vibration attenuation Ground vibrations are an integral part of the process of rock blasting The analysis of blasting Scale model test study of influence of joints on blasting vibration 2015年9月20日 The ground vibration generated by mine blasting is popularly also called Blast Induced Ground Motion (BIGM) Allowable intensity of shaking due to mine blast for residential structures near an (PDF) Optimization of Blasting Parameters A case study2024年9月1日 Based on the empirical equation and safe PPV provided by the blasting vibration safe standards on tunnels of China (GB67222014), and considering the influence of all structures and directions, it is determined that the safe distance of blasting vibration in the tested tunnel project should be larger than 2028–1831 m, 1831–1616 m, and 1616–1375 m for blasting Attenuation of blastinduced vibration on tunnel structures
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Evaluation of influence of vibrations generated by blasting
2014年7月1日 3 Blasting construction and field monitoring31 Blasting scheme and its implementation In the blasting construction, four sections of diaphragm wall are divided to be exploded in three groups, ie the first and second blasting constructions for the east and west sections of diaphragm wall close to the southline tunnel, respectively, while the third blasting