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  • Application of HHT Method in Identification of Blasting

    The identification of delay of millisecond blasting is an important basis for the adjustment and optimization of blasting scheme. Based on the HHT (Transform Hilbert-Huang) theory the millisecond delay of blasting vibration signal collected by the actual tunnel engineering is identified by the HHT method. By using the EMD (Empirical Mode Decomposition) of HHT transformation the typical

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  • Analysis on Time-frequency Characteristics and Delay

     · monitoring and initiative control of blast vibration damage 12-13 . The study on how to determine vibration characteristics and delay time of blasting vibration signal has important and imminently practical significance. In the present paper the regressive analysis about propagation characteristics of blasting vibration signal along

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  • OSM Blasting Performance Standards 30 Code of Federal

     · (2) Identification of the specific areas in which blasting will take place (3) Dates and time periods when explosives are to be detonated (4) Methods to be used to control access to the blasting area and (5) Type and patterns of audible warning and all-clear signals to be used before and after blasting.

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  • A Damage Identification Method of a Breathing Cracked

     · A Damage Identification Method of a Breathing Cracked Beam by Natural Frequency J . China Mechanical Engineering 2017 28(06) 713. URL

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  • Prediction and Calculation of Construction Vibrations

     · Construction vibration sources have a wide range of energy and velocity as a function of time transmitted on the ground. Analysis of existing methods for predicting ground and structure vibrations shows that empirical equations provide calculations only of amplitudes of vertical soil vibrations with insufficient accuracy.

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  • Vibration‐Based Damage Identification Methods

    Summary This chapter offers a comprehensive and updated review on various methods for detecting and localising damage in a structure using measured vibration modal data. First proper structural mo

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  • Reducing vibration damage claims Field application of

     · Reducing vibration damage claims Field application of strong public relations and one method of using commonly available seismograph and video taping equipment to document blast vibration regression at the nearest structure

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  • Figure 1 from Identification of blasting vibration and

    DOI 10.1007/s Corpus ID . Identification of blasting vibration and coal-rock fracturing microseismic signals article Zhang2018IdentificationOB title= Identification of blasting vibration and coal-rock fracturing microseismic signals author= X. Zhang and Ruisheng Jia and Xin-ming Lu and Yanjun Peng and W. Zhao journal= Applied Geophysics year= 2018 volume

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  • Structural Identification and Damage Characterization of a

    Structural identification by global optimization of a modal parameter-based objective function using genetic algorithm is employed over two stages to produce calibrated finite-element models of the wall in the preblast and postblast conditions. Damage characterization is explored through changes in the structural properties of the calibrated

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  • EFFECT OF TRAIN VIBRATION ON BUILDINGS -

    The literature suggests that the hearing range begins at 16 Hz. Additionally the sound generated by the vibration of the ground ranges from 15 Hz to 125 Hz. A comparison of this data and the above mentioned scope of ground vibration between 1 and 80 Hz allows one to observe that the identification of received

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  • A Damage Identification Method of a Breathing Cracked

     · A Damage Identification Method of a Breathing Cracked Beam by Natural Frequency J . China Mechanical Engineering 2017 28(06) 713. URL

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  • Measurement of blast damageOSMRE

     · blast damage it is important to distinguish between dam­ age related to blasting (vibrations and high-pressure gases) and damage caused by ground-stress redistribu­ tion. Although the impact of damage is perhaps more evident underground the causes of the overall rock-mass damage such as inherent damage caused by tectonic

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  • Mine blasting vibration and its effects on buildings and

     · Mine blasting vibration and its effects on buildings and in a few of these cases vibration damage cannot be positively ruled out and the damage attributed to the more common reactive clay foundation movement vibration modes being in the 12 Hz to 16 Hz range

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  • A comparative study of delay time identification by

     · Different from Zhang s method this paper proposes an instantaneous energy analysis method to identify delay time of millisecond blasting and it is found that the instantaneous energy of the vibration signal is a precise indicator of the initiation sequence. Finally a

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  • Vibration‐Based Damage Identification MethodsStructural

    Summary This chapter offers a comprehensive and updated review on various methods for detecting and localising damage in a structure using measured vibration modal data. First proper structural mo

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  • SEISMIC TOMOGRAPHY TECHNIQUE FOR DETERMINING DAMAGE RANGE

     · SEISMIC TOMOGRAPHY TECHNIQUE FOR DETERMINING DAMAGE RANGE IN BED ROCK BLASTING. A new method for determining rock damage ranges is presented for the first time on the basis of combining seismic tomography technique and elastic wave method. In addition the critical vibration speed in the jointed rock mass in Three Gorges Project the largest

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  • Study on a Novel Fault Damage Degree Identification Method

    A damage degree identification method based on high-order difference mathematical morphology gradient spectrum entropy (HMGSEDI) is proposed in this paper to solve the problem that fault signal of rolling bearings are weak and difficult to be quantitatively measured. In the HMGSEDI method on the ba

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  • 827. Influence of concave groove on transmission of

     · 827. INFLUENCE OF CONCAVE GROOVE ON TRANSMISSION OF BLASTING VIBRATION WAVE. IAU-TEH WANG CHIN-YU LEE 1032 VIBROENGINEERING.JOURNAL OF VIBROENGINEERING.SEPTEMBER 2012.VOLUME 14 ISSUE 3.ISSN in the explosion as well as the theory of conservation of mass energy and momentum in the propagation of detonation

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  • Noise and vibration from blasting Guideline

     · Guideline Noise and vibration from blasting Page 4 of 5 • ESR/2016/2169 • Version 3.01 • Last reviewed 18 MAR 20 Department of Environment and Science RecordingDetails of the measurement instrumentation measurement procedure location date and time of recording and conditions prevailing during measurements must be recorded for each assessment.

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  • Blasting VibrationsVibrationdamage

     · Blasting Vibrations. Blasting is by far the most-studied source of ground vibration as the potential for that vibration to damage structures was recognized far earlier than that of construction heavy equipment. There is a large scientific and technical literature of blasting vibration effects on homes and other structures worldwide. 1

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  • Review of criteria for estimating damage to residences

    OSTI.GOV Technical Report Review of criteria for estimating damage to residences from blasting vibrations

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  • A novel method for automatic identification of rock

     · Based on the methods described above this section summarizes our proposed method to achieve automatic identification of MS and blasting signals. Fig. 9 shows the detailed process of our method with some successive stages using different strategies and methods. Download Download high-res image (936KB) Download Download full-size image Fig. 9.

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  • Law of blasting vibration damage and stability analysis to

    Abstract In order to explore the law of blasting vibration damage to slope in open-pit mine and improve its safety an experimental study was carried out on the west slope of Zahanaoer open-pit mine in Huolinhe of Inner Mongolia taken as the research object. On the basis of the engineering geological survey the slope damage degree by blasting load was quantified and a damage function on the

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  • Blasting vibrations and building damageNRC Publications

    Building vibration and building damage resulting from blasting operations were studied in a series of experiments on expendable buildings. Sixty charges ranging from 0.3 lb to 1 600 lb were set off at distances of 3ft to 300ft from the buildings under study. For this range the primary evidence of damage was in basement walls.

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  • MONITORING OF DILATION CRACKS AND VIBRATIONS

    4. Vibration gauge The vibration gauges are placed in a box that is permanently fixed next to the dilation sensors. The sensors are vertically and horizontally oriented respectively. The vibration gauges are consti-tuted by two piezoelectric accelerometers. Nevertheless the required parameter for seismic effect evaluation of blasting works on con-

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  • Non-modal vibration-based methods for Bridge Damage

     · Non-modal vibration-based methods for Bridge Damage Identification Rick M. Delgadilloa and Joan R. Casasa aDepartment of Civil and Environmental Engin eering Technical University of Catalonia (BarcelonaTech) Catalonia Spain Campus Nord C1 building. Jordi Girona 1-3 08034 Barcelona Spain e-mail.

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  • Research on Time-frequency Characteristics for Blasting

     · blasting vibration signal in the frequency range of 0-20 Hz is more obvious and reach 92.9 of the total energy meanwhile the CO2 blasting vibration energy within 20-100 Hz is relatively small with 6.4 energy percentage. The analysis results can provide reference for similar design and construction of carbon dioxide blasting.

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  • STUDY ON THE BLASTING SEISMIC DAMAGE CONTROL

     · of blasting vibration damage 20 21 and have made a lot of achievements. However due to the complexity and uncertainty of the geological conditions of the tunnel the control and reinforcement technology of the blasting damage of small spacing tunnel is still a difficult problem.

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  • Construction Vibration Damage GuideIntro

     · The Construction Vibration Damage Guide (CVDG) Introduction and Summary. This chapter of the Construction Vibration Damage Guide ("CVDG") in the free Homeowners edition and the comprehensive Professional Edition is your key to the extensive information provided in the CVDG s other chapters about most aspects of vibration damage to houses buildings and other structures.

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  • Pier Column Type I Pile ShaftCalifornia Department

     · Piers W2 project blasting shall conform to Sections 7-1.10 "Use of Explosives " and 19-2.03 "Blasting " of the Standard Specifications and these special provisions. The Contractor shall control project blasting effects (fly rock ground motion and air noise levels) within the safe limits so as not to cause damage to neighboring improvements.

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  • Monitoring and analysis of blasting vibration in tunnel

    Vibration monitoring of blasting excavation of drainage tunnel in Lufeng Nuclear Power Plant is carried out and the data of blasting vibration is analyzed in this paper. The results show that (1) The vertical vibration velocity of the rock mass is greater than the horizontal radial and horizontal tangential vibration velocity (2) The blasting vibration velocity of rock mass decreases with

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  • Assessing vibration a technical guideline

     · occupational vibration blasting vibration effects or vibration-induced damage to buildings or structures. Section 1 provides information on how the guideline was developed what extra features have been included since the previous guideline (Environmental noise control manual Chapter 174) and who the guideline is for.

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  • Study on Distribution Characteristics of Damage Range

     · The damage range of surrounding rock has an important influence on optimization of blasting parameters. This study based on the vibration attenuation law near the blasting source and the characteristics of the load acting on the wall of the smooth blasting hole derives the distribution formulas of the damage range along the borehole during the expansion and quasistatic processes of

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  • Application of HHT Method in Identification of Blasting

    The identification of delay of millisecond blasting is an important basis for the adjustment and optimization of blasting scheme. Based on the HHT (Transform Hilbert-Huang) theory the millisecond delay of blasting vibration signal collected by the actual tunnel engineering is identified by the HHT method. By using the EMD (Empirical Mode Decomposition) of HHT transformation the typical

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  • COMPARATION OF SOME VIBRATION BASED DAMAGE

     · The method of using vibration data for detecting cracks appeared in the 1940s. A comprehensive survey of the available literature can be found in 6 7 . These reports reviewed various methods on detection and identification of structural damage using vibration based testing. This paper compares the results of damage identification presented in

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  • AN IDENTIFICATION OF GROUND VIBRATION IN NORTH

     · An Identification of Ground Vibration in North-East of Thailand by Blasting . . . .1553 Journal of Engineering Science and Technology June 2018 Vol. 13(6) Many parts of structures will have their natural frequency between 4-12 Hz 7 .

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  • Method of S Wave Identification Application to Measured

    S wave identification is an indispensable step in the process of deriving the dynamic parameters of rock masses which are highly significant in guiding the design and constructio

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  • Blasting Solutions for the Construction Market

     · • Measurement Orica uses a range of measurement systems for the assessment of blast impacts such as rock movement fragmentation blast damage prediction modelling flyrock vibration and airblast as well as product performance and cycle time. Blast Based Services Through our vast global experience in construction projects we

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  • Application of HHT Method in Identification of Blasting

    Accurate identification of delay time in millisecond blasting has always been a hot is-sue in the field of blasting 1-2 . At present the method of identifying the delay in mil-lisecond blasting is mainly based on the wavelet transform time energy density meth-od EMD (Empirical Mode Decomposition) identification method etc. However due

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  • Application of the vibration method for damage

     · Application of the vibration method for damage identification of a beam with a variable cross-sectional area Izabela Zamorska1 Dawid Cekus1 Mateusz Miara1 1Czestochowa University ofTechnology Faculty of Mechanical Engineering and Computer Science Czestochowa Poland Abstract.

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  • Blasting Vibrations and Building Damage Semantic

    Building vibration and building damage resulting from blasting operations were studied in a series of experiments on expendable buildings. Sixty charges · ranging from 0·31b to 1 600 lb were set off at distances of 3ft to 300ft from the buildings under study. For this range the primary evidence of damage was in basement walls. Observations were made of vibration displacement velocity

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  • Minimising the adverse impacts of blastingQuarry

     · Maxam views the identification and proactive management of risk as fundamental in its business. We must assist our customers with environmental risks due to blasting operations which is a challenge as we are often dealing with the emotions of community members not facts.. Management of environmental effects of blasting is time-consuming to most operators as it continually changes.

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