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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 holeblasting in 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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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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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 in, in order to insure the safety of the upper buildings, technologies of parallel cut with big empty holeproblems 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    

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

Shen Zhenyu,Zhang Pengjun,Wang Xuguang,Yu Yalun

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

Abstract:

The application of the technique of the excavation by long-hole typeblasting in the Olympic Games flying-saucer stadium was introduced in the article.In 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 that

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

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Study on Blasting at Ever-frost Ground in Qinghai-Tibet Plateau

He Guangyi

Strategic Study of CAE 2001, Volume 3, Issue 6,   Pages 57-64

Abstract:

The paper introduces the research achievements on blasting while the writer participated the railwayIt describes the blasting methods and technology, and practicable cumulative blasting technology according

Keywords： ever-frost ground     cutting     foundation pit     drilling hole     cumulative shell     cumulative blasting    

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Combined Fenton process and sulfide precipitation for removal of heavy metals from industrial wastewater: Bench

Huosheng Li, Hongguo Zhang, Jianyou Long, Ping Zhang, Yongheng Chen

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 4, doi: 10.1007/s11783-019-1130-7

Abstract:

Bench and pilot studies demonstrated the effectiveness

Keywords： Thallium     Pilot     Fenton     Sulfide precipitation     Heavy metal     Industrial wastewater    

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Long-Term Performance and Microstructural Characterization of Dam Concrete in the Three Gorges Project

Chen Lyu,Cheng Yu,Chao Lu,Li Pan,Wenwei Li,Jiaping Liu,

Engineering doi: 10.1016/j.eng.2023.04.017

Abstract: This study investigates the long-term performance of laboratory dam concrete in different curing environmentsHowever, curing and long-term exposure to the local natural environment reduced the frost resistance.Microstructural analyses of the laboratory concrete samples demonstrated that moderate-heat cement andThis dense and homogenous microstructure was the crucial reason for the excellent long-term performanceIn this study, both macro performance and microstructural analyses revealed that the application of moderate-heat

Keywords： Three Gorges Dam     Long-term performance     Microstructural analysis     Moderate-heat cement     Fly ash    

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Key technologies of precision demolition blasting of ultra-long urban viaduct in complicated surroundings

Xie Xianqi,Jia Yongsheng,Yao Yingkang,Sun Jinshan,Wu Xinxia,Liu Changbang

Strategic Study of CAE 2014, Volume 16, Issue 11,   Pages 65-71

Abstract:

Key technologies of precision blasting were put forward based on characteristics of urban viaductblasting demolition in complicated surroundings.and sequenced collapsed dynamics model were established for quantitative blasting design.initiation network of non-electric duplication crossover was adopted for safety and reliability of ultra-longThe rationality of blasting scheme and parameters were validated by physical model test.

Keywords： viaduct     blasting demolition     precision blasting     instability model     initiation network     adverse effects control    

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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/RuOx 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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Improving hole transfer of boron nitride quantum dots modified PDI for efficient photodegradation

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11,   Pages 1718-1727 doi: 10.1007/s11705-023-2319-7

Abstract: In recent years, organic photocatalyst under visible-light absorption has shown significant potential for solving environmental problems. However, it is still a great challenge for constructing a highly active organic photocatalyst due to the low separation efficiency of photogenerated carriers. Herein, an effective and robust photocatalyst perylene-3,4,9,10-tetracarboxylic diamide/boron nitride quantum dots (PDI/BNQDs), consisting of self-assemble PDI with π–π stacking structure and BNQDs, has been constructed and researched under visible light irradiation. The PDI/BNQDs composite gradually increases organic pollutant photodegradation with the loading amount of BNQDs. With 10 mL of BNQDs solution added (PDI/BNQDs-10), the organic pollutant photodegradation performance reaches a maximum, about 6.16 times higher with methylene blue and 1.68 times higher with ciprofloxacin than that of pure PDI supramolecular. The enhancement is attributed to improved separation of photogenerated carriers from self-assembled PDI by BNQDs due to their preeminent ability to extract holes. This work is significant for the supplement of PDI supramolecular composite materials. We believe that this photocatalytic design is capable of expanding organic semiconductors’ potential for their applications in photocatalysis.

Keywords： PDI     boron nitride     quantum dots     photocatalysis     hole transfer    

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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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Recent advances in systemic lupus erythematosus and microbiota: from bench to bedside

Frontiers of Medicine 2022, Volume 16, Issue 5,   Pages 686-700 doi: 10.1007/s11684-022-0957-7

Abstract: Systemic lupus erythematosus (SLE) is a complicated autoimmune disease affecting multiple systems and organs. It is highly heterogeneous, and it preferentially affects women at childbearing age, causing worldwide social burden. The pathogenesis of SLE mostly involves genetic predisposition, epigenetic dysregulation, overactivation of the immune system, and environment factors. Human microbiome, which is mostly composed of microbiota colonized in the gut, skin, and oral cavity, provides a natural microbiome barrier against environmental risks. The past decade of research has demonstrated a strong association between microbiota and metabolic diseases or gastrointestinal diseases. However, the role of microbiota in autoimmunity remains largely unknown until recently, when the technological and methodological progress facilitates further microbiota research in SLE. In this review, the latest research about the role and mechanisms of microbiota in SLE and the advances in the development of diagnostic and therapeutic strategies based on microbiota for SLE were summarized.

Keywords： systemic lupus erythematosus     microbiota     biotherapy    

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A novel intravenous general anesthetic--- emulsified isoflurane: from bench to bedside

Cheng Zhou, Jin Liu

Frontiers of Medicine 2012, Volume 6, Issue 4,   Pages 381-387 doi: 10.1007/s11684-012-0229-z

Abstract:

Application of volatile anesthetics greatly alters modern medicine. There are obvious advantages of volatile anesthetics such as strong anesthetic potency, rapid onset and elimination through respiration system. Isoflurane is one of the most widely used volatile anesthetics in clinic. Emulsified isoflurane, the emulsion of isoflurane, is a novel intravenous general anesthetic. With the development of emulsified isoflurane in the past fifteen years, its utility has spread from intravenous general anesthesia to various fields including regional anesthesia, organ protection, as well as anesthetic pharmacological study. In this review, we will summarize literatures of emulsified isoflurane about its history, clinical application and future potential utility in the above mentioned fields.

Keywords： emulsified isoflurane (EI)     general anesthesia     regional anesthesia     organ protection     anesthetic pharmacological study    

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Title Author Date Type Operation

Numerical simulation of blasting effect with divided charge structure

Hu Tao ,Li Xianglong,Guan Si ,He Lihua

Journal Article

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

Zhao Yanwei,He Dongmei,Li Xianglong,Liu Junxuan

Journal Article

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

Fang Junbo

Journal Article

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

Shen Zhenyu,Wang Xuguang,Yu Yalun,Liu Honggang

Journal Article

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

Shen Zhenyu,Zhang Pengjun,Wang Xuguang,Yu Yalun

Journal Article

Study on Blasting at Ever-frost Ground in Qinghai-Tibet Plateau

He Guangyi

Journal Article

Combined Fenton process and sulfide precipitation for removal of heavy metals from industrial wastewater: Bench

Huosheng Li, Hongguo Zhang, Jianyou Long, Ping Zhang, Yongheng Chen

Journal Article

Long-Term Performance and Microstructural Characterization of Dam Concrete in the Three Gorges Project

Chen Lyu,Cheng Yu,Chao Lu,Li Pan,Wenwei Li,Jiaping Liu,

Journal Article

Key technologies of precision demolition blasting of ultra-long urban viaduct in complicated surroundings

Xie Xianqi,Jia Yongsheng,Yao Yingkang,Sun Jinshan,Wu Xinxia,Liu Changbang

Journal Article

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

Dejun SHI, Ke QIAO, Zifeng YAN

Journal Article

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

Journal Article

Improving hole transfer of boron nitride quantum dots modified PDI for efficient photodegradation

Journal Article

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

Journal Article

Recent advances in systemic lupus erythematosus and microbiota: from bench to bedside

Journal Article

A novel intravenous general anesthetic--- emulsified isoflurane: from bench to bedside

Cheng Zhou, Jin Liu

Journal Article