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Study on Cumulalive Energy Effect in Directional Fracture Controlled Blasting in Rock

Luo Yong,Shen Zhaowu

Strategic Study of CAE 2006, Volume 8, Issue 6, Pages 78-82

Abstract: to solve the problems of stone exploitation, the mechanism of crack initiation and its expansion of directionalfracture controlled blasting with linear cavity effect cutter in rock were roughly studied based onthe theories of cumulative energy effect, mechanics of explosive and rock fracture mechanics, then theThe directional expansion of crack is satisfactory.Model test and field test suggest that the directional fracture controlled blasting with linear cavity

Keywords： cumulative energy effect directional fracture controlled blasting model test liner fracture

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Safety and Rapid Construction Technology in Expand Cutting at Existing Line with Controlled Rock Blasting

He Guangyi,Jing Shan,Wang Zhaoyou

Strategic Study of CAE 2000, Volume 2, Issue 6, Pages 73-79

Abstract:

The blasting conditions, topography and geology of rock blasting for expanding cutting at the existingline of electrified railway are more complicated and difficult than that of rock blasting or foundationelectrify overhead contact line and short space to the existing line, it is much more difficult than blasting

Keywords： eclectrified overhead contact line existing line expanding of cutting controlled rock blasting non-electric

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The analysis & effect of excavation of rock by controlled blastingin the Olympic Games flying saucer

Shen Zhenyu,Zhang Pengjun,Wang Xuguang,Yu Yalun

Strategic Study of CAE 2009, Volume 11, Issue 11, Pages 13-16

Abstract: p style="text-align: justify;">The application of the technique of the excavation by long-hole type blastingIn the complicated surroundings,some techniques were adopted such as out-hole millisecond delay blasting, underload, the longer length of stemming to control the danger of blasting vibration and fly rock,atthe same time,in view of the complex geological condition, presplitting blasting was adopted so thatblasting parameters were optimized to make the side slope integrated.The paper summarized and provided

Keywords： excavation of rock long-hole type blasting presplitting blasting overbreak rock

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Improved directional-distance filter

JIN Lianghai, LI Dehua

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 2, Pages 205-211 doi: 10.1007/s11465-008-0025-2

Abstract: By combining the weighting function and the traditional directional-distance filter (DDF) in a novelway, a new vector filter - the adaptive distance-weighted directional-distance filter (ADWDDF) - is presented

Keywords： information distance-weighted directional-distance ADWDDF traditional DDF spatial-distance weighting

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A Bayesian modeling approach to bi-directional pedestrian flows in carnival events

S. Q. XIE, S. C. WONG, William H. K. LAM

Frontiers of Engineering Management 2017, Volume 4, Issue 4, Pages 483-489 doi: 10.15302/J-FEM-2017023

Abstract: Bi-directional pedestrian flows are common at crosswalks, footpaths, and shopping areas.Bayesian inference was employed to calibrate the model by using prior data obtained from a previous controlled

Keywords： pedestrian flow model bi-directional interactions empirical studies Bayesian inference

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Safety assessment for buried drainage box culvert under influence of underground connected aisle blasting

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 2, Pages 191-204 doi: 10.1007/s11709-022-0906-1

Abstract: Blasting engineering in complex urban environments is considered to influence the safety and stabilityTherefore, field blasting and vibration tests were performed on the blasting engineering of the Wuhanused to analyze the dynamic response characteristics of an underground drainage box culvert during the blastingThe vibration response evolution law of the buried drainage box culvert under blasting vibration was

Keywords： drainage box culvert underpass blasting dynamic response numerical simulation safety assessment

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Acoustic characteristics of bi-directional turbines for thermoacoustic generators

Dongdong LIU, Yanyan CHEN, Wei DAI, Ercang LUO

Frontiers in Energy 2022, Volume 16, Issue 6, Pages 1027-1036 doi: 10.1007/s11708-020-0702-3

Abstract: Bi-directional turbines combined with rotary motors may be a feasible option for developing high powerA general expression for the acoustic characteristics of the bi-directional turbine was proposed basedThe good fit of the correlations shows that these characteristics are valid for describing the bi-directional

Keywords： thermoacoustic power generator acoustic characteristics bi-directional impulse turbine energy conversion

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Progresses in Explosive Materials and Engineering Blasting

Wang Xuguang

Strategic Study of CAE 2002, Volume 4, Issue 4, Pages 36-40

Abstract:

The progresses in explosive materials and engineering blasting in the recent five years at home and

Keywords： explosive blasting accessories blasting

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Study on Blasting Fragmentation Control for Moderate Deep Hole in Underground Mine

Zhao Yanwei,He Dongmei,Li Xianglong,Liu Junxuan

Strategic Study of CAE 2014, Volume 16, Issue 11, Pages 48-52

Abstract:

The scallop moderate longhole blasting mining method in Da Hong-shanIn order to realize the mine production efficient development, the circular moderate longhole blastingThe test results show that circular hole blasting can reduce the block rate is reduced to 10.3%, andthe traditional scallop moderate longhole blasting mining compared with the average lump ore decreasedof detonators, the efficiency of drawing and at the same time, reduce the mining cost ,achieved good blasting

Keywords： The scallop moderate longhole blasting the circular moderate longhole blasting lump ore blasting effect

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Synthesis and characterization of biocompatible polyurethanes for controlled release of hydrophobic and

Juichen YANG,Hong CHEN,Yuan YUAN,Debanjan SARKAR,Jie ZHENG

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 4, Pages 498-510 doi: 10.1007/s11705-014-1451-9

Abstract: Design of biocompatible and biodegradable polymer systems for sustained and controlled release of bioactiveHere, we designed, synthesized, and characterized four polyurethane carrier systems for controlled release

Keywords： phase structure degradation polyurethanes controlled release drug delivery

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Design，test and construction of the LKP1000-type movable shot blasting machine

Zhou Chang,Kan Rong ,Zhou Yi,Jiang Qin,Zhu Liang

Strategic Study of CAE 2013, Volume 15, Issue 8, Pages 84-88

Abstract:

Shot blasting process is a process which use of shot blasting materialIn order to make the working efficiency and process of shot blasting machine more optimization, thisthrough mathematical analysis and validation adjustment by experimental machine design new type of shot blastingThis research conduct optimize design and discussion for the size and position of key parts of shot blastingwidth reach 1 000 mm, and at the same time ensure best shot blasting effect.

Keywords： shot blasting machine shot blasting apparatus surface treatment experimental machine shot blastingwidth shot blasting effect

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Tests on impact effect of partial fracture at steel frame connections

CHEN Yiyi, BIAN Ruoning

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 4, Pages 295-301 doi: 10.1007/s11709-008-0049-z

Abstract: Impact effect of sudden fracture at steel frame connections under severe earthquake or other extremeThe relation of impulse caused by structural fracture to the release of inner force at the cracked locationIt is also revealed that the instant fracture of structural connection is characterized by progressiveand partial fracture.Numerical evaluation of the impact effect of connection fracture is carried out.

Keywords： structural fracture natural fracture progressive high-frequency

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Effect of fly ash replacement level on the fracture behavior of concrete

Mahdi AREZOUMANDI, Jeffery S. VOLZ

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 4, Pages 411-418 doi: 10.1007/s11709-013-0228-4

Abstract: results of an experimental investigation that evaluates effect of fly ash replacement level on the fractureThis experimental program consisted of 32 fracture beams to study the fracture behavior of concrete.The experimental fracture energies were compared with the fracture energy provisions of different designevaluate whether or not there is any statistically significant difference between the experimental fracturethese statistical tests show that the mix with higher level of fly ash replacement level has higher fracture

Keywords： concrete fracture energy fly ash

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The Vibration Testing Analysis of Chamber & Deep-hole Pre-splitting Blasting

Shen Zhenyu,Wang Xuguang,Yu Yalun,Liu Honggang

Strategic Study of CAE 2006, Volume 8, Issue 3, Pages 70-74

Abstract:

The vibration testing analysis of blasting in Tai-Chang freeway show that it is chamber & deep-holepre-splitting blasting that can strikingly drop the seismic effect of chamber blasting, so it effectivelysolves some problems of slope stability, slope quality and safety of building & structure that blastingThe improved technique of chamber blasting is beneficial to extending its scope of application so that

Keywords： chamber blasting deep-hole pre-splitting blasting blasting vibration vibration testing analysis

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Computational modeling of fracture in concrete: A review

Luthﬁ Muhammad Mauludin, Chahmi Oucif

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3, Pages 586-598 doi: 10.1007/s11709-020-0573-z

Abstract: This paper presents a review of fracture modeling of concrete.Based on comprehensive literature review, there are two main approaches considered to-date of concrete fractureThe purpose of this review is to provide insight comparison from different techniques in modeling of fractureIn the first section, an overview of fracture modeling in general is highlighted.

Keywords： concrete fracture macroscopic micromechanical heterogeneity