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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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Numerical simulation of blasting effect with divided charge structure

Hu Tao ,Li Xianglong,Guan Si ,He Lihua

Strategic Study of CAE 2014, Volume 16, Issue 11, Pages 36-41

Abstract: numerically simulates the stress development and generates a three-dimensional model of the medium-deep hole blastingin infinite rock mass for continuous charge and divided charge in blasting by using the large-scaleThe difference of the decreasing rate in Von Mises effective stress of blasting, element effective stressIt is shown that divided charge could greatly improve the blasting effect by engineering blasting practice

Keywords： Moderate long hole bench blasting Divided charge ANSYS/LS-DYNA Numerical simulation

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Effect of potassium carbonate on catalytic synthesis of calcium carbide at moderate temperature

Dejun SHI, Ke QIAO, Zifeng YAN

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 3, Pages 372-375 doi: 10.1007/s11705-010-0570-1

Abstract: Calcium carbide was successfully synthesized by carbothermal reduction of lime with coke at 1973 K for 1.5 h. The effect of potassium carbonate as additive on the composition and morphology of the product was investigated using X-ray diffraction and scanning electron microscope. Addition of potassium carbonate increased the yield of calcium carbide. The sample in the presence of potassium carbonate generated acetylene gas of 168.3 L/kg, which was 10% higher than that in the absence of potassium carbonate. This result confirmed the catalytic effect of potassium carbonate on the synthesis of calcium carbide. A possible mechanism of the above effects was that the additive, which was melted at the reduction temperature, dissolved CaO and so promoted the contact between CaO and carbon, which was essential for the solid-solid reaction to form calcium carbide.

Keywords： calcium carbide synthesis catalysis

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Development of an H reduction and moderate oxidation method for 3,5-dimethylpyridine hydrogenation in

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 12, Pages 1807-1817 doi: 10.1007/s11705-022-2243-2

Abstract: Therefore, an in-situ H₂ reduction and moderate oxidation method was developed to increaseconversion was obtained for the Ru/C-i1 catalyst prepared by in-situ H₂ reduction and moderatesignificant decrease in the Ru/RuO_x ratio of the in-situ H₂ reduction and moderateThe developed in-situ H₂ reduction and moderate oxidation method eliminated the step

Keywords： Ru/C catalyst in-situ H₂ reduction and moderate oxidation in-situ reduction

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LEVERAGING LIVESTOCK TO PROMOTE A CIRCULAR FOOD SYSTEM

Zhengxia DOU

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 1, Pages 188-192 doi: 10.15302/J-FASE-2020370

Abstract: animal-derived food is slowing while attention is growing over the role of livestock farming in an enhanced circular

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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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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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LEVERAGING LIVESTOCK TO PROMOTE A CIRCULAR FOOD SYSTEM

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 1,

Abstract: animal-derived food is slowing while attention is growing over the role of livestock farming in an enhanced circular

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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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Circular economy：ideas and innovation

Jin Yong,Feng Zhijun,Chen Dingjiang

Strategic Study of CAE 2010, Volume 12, Issue 1, Pages 4-11

Abstract: "text-align: justify;">It has been over a decade since China paid close attention to the concept of circularDuring this period the country made promoting circular economy as one of the basic national developmentimportant ideas and theories, which could be used as general guidelines for innovation to boost the circular

Keywords： circular economy circular economics

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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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Current Situation and Prospect of Precision Blasting

Xie Xianqi

Strategic Study of CAE 2014, Volume 16, Issue 11, Pages 14-19

Abstract:

Precision blasting is different from control blasting, was regarded as the symbol of development newstage of engineering blasting.With regard to the prospect of precision blasting, following aspects should be studied furthermore: (1) In order to provide theoretical basis of explosive energy release and quantitative blasting designNumerical simulation was an important method for engineering blasting scheme optimization and blasting

Keywords： Precision blasting current situation information technology standardization prospect

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Frequencies of circular plate with concentric ring and elastic edge support

Lokavarapu Bhaskara RAO,Chellapilla Kameswara RAO

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 2, Pages 168-176 doi: 10.1007/s11465-014-0299-5

Abstract:

Exact solutions for the flexural vibrations of circular plates having elastic edge conditions alongValues of frequency parameter for the considered circular plate are computed for different sets of valuesrotational and linear restraints and the radius of the rigid ring support on the vibration behavior of circular

Keywords： circular plate frequency elastic edge rigid ring mode switching

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New technology of double-pipe protecting borehole wall blasting

Pu Chuanjin,Xiao Zhengxue,Zhang Zhicheng,Hao Yafei

Strategic Study of CAE 2009, Volume 11, Issue 8, Pages 88-92

Abstract:

Double-pipe protecting borehole wall balsting,a new control blastingand directional fracture controlled blasting.The characteristics of the new blasting technology, matching sets and explosion mechanism are detailedlyintroduced in the paper.The results of experiment on single borehole model blasting and tunnel diggingtesting indicate that it has very good blasting effect.

Keywords： blasting engineering double-pipe protecting borehole wall balasting sets blasting mechanism dynamic

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Blasting Technologies of Decreasing Vibration in Subway Tunnel Underpass Adjacent Upper Buildings

Fang Junbo

Strategic Study of CAE 2014, Volume 16, Issue 11, Pages 58-64

Abstract:

Reduce the blasting vibration is important for blasting excavation inproblems of shock conducting tube detonator delay number difficulty to meet large cross-section tunnel blasting

Keywords： blasting design parallel cut big empty hole delay- time initiation short- hole blasting