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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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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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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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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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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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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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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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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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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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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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Method of blasting multiple layers or levels of rock

24. A method of blasting according to claim 1 wherein in said single cycle the blast in the first body of material is initiated before initiation of the blast in the second body of material. 25. A method of blasting according to claim 1 wherein the explosives in the blast field

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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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CBD-63. Blasting and Building DamageNRC-IRC

 · CBD-63. Blasting and Building Damage. Originally published March 1965. T.D. Northwood and R. Crawford. When blasting operations are undertaken in a settled area the occupants of the surrounding buildings often become aware of the accompanying ground vibrations.

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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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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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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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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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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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