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Full-mechanized caving mining technology of extremely thick and hard coal-seam with hard roof in shallow

Zhang Zhongwen,Wu Jinan

Strategic Study of CAE 2011, Volume 13, Issue 11,   Pages 107-112

Abstract:

Top-coal caving difficulty degree and rational mining method were analyzedby theoretical method on the basis of the 4th coal-seam condition of Pingshuo Mining area.For improving top-coal caving degree, the parameters of full-mechanized caving mining face were obtainedrecovery ratio would be realized by lengthening mining face and adding mining height in shallow buried hardcoal-seam with hard roof.

Keywords： shallow buried depth     hard coal-seam with hard roof     top-coal caving difficulty degree     full-mechanized    

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Technology of Coal-Rock Mass Hydraulic Fracture Weakeningand Its Development

Huang Bingxiang,Deng Guangzhe,Liu Changyou

Strategic Study of CAE 2007, Volume 9, Issue 4,   Pages 83-88

Abstract:

Technologic problems of top coal recovery ratio, rock burst, coal spontaneouscombustion and gas accumulation induced by hard top-coal or roof's fall in coal mining were introducedCurrent research and development trend of hydraulic fracture weakening for hard top-coal or roof was

Keywords： hard top-coal(roof)     hydraulic fracture     crack expanding     mescoscopic structure    

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Longwall Top Coal Caving Method and Its Future in China

Zhao Jingche

Strategic Study of CAE 2001, Volume 3, Issue 4,   Pages 9-16

Abstract:

This paper gives a brief introduction of the longwall top coal caving (LTCC) method which has hada strong impact on China´s coal mining industry since 1980 s.Great contribution to LTCC has been

Keywords： coal mining     longwall top coal caving     roof control     recovery     coalmine safety    

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Design and construction of steel roof truss on top of Three Gorges Project ship lift machine room

Sun Changzhong

Strategic Study of CAE 2013, Volume 15, Issue 9,   Pages 33-39

Abstract:

According to the use of the steel roof truss on top of the Three GorgesProject ship lift machine room, steel roof truss structure is analyzed.construction work at the top of the room environment.rack, roof panel, etc.the top room truss ensure the smooth installation of the steel roof truss and safe operation.

Keywords： ship lift     computer room     steel roof truss     design     construction     Three Gorges Project    

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Effects of green roof damping and configuration on structural seismic response

Frontiers of Structural and Civil Engineering   Pages 1133-1144 doi: 10.1007/s11709-023-0959-9

Abstract: The soil of a green roof can serve as a damper to dissipate the energy generated by earthquakes or otherResults of preliminary analysis show that a green roof soil can increase localized damping by 2.5% underconducted on a three-story building in SAP2000 to monitor the structural behavior with and without a green roofThe increased damping in the green roof soil is beneficial to the structural performance, i.e., it reduces

Keywords： green infrastructure     green roof     structural resilience     seismic design    

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Coal seam roof and floor hydrogeology conditions evaluation of Pingshuo No.1 mine and measures of preventing

Zhang Zhongwen,Wu Qiang,Fu Enjun,Fan Zhenli

Strategic Study of CAE 2011, Volume 13, Issue 11,   Pages 94-101

Abstract:

Aiming at water hazards menace of Pingshuo No.1 coal mine roof and floor, the paper ascertains relevant factors of coal mine water bursting on the base of analyzing the miningand geology conditions, and evaluates the roof hydrogeology conditions and floor water bursting vulnerability

Keywords： three maps method     vulnerability index method     water hazards of coal mine     prevented measures of water    

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Analysis of load and adaptability of disc cutters during shield tunneling in soft–hard varied strata

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 533-545 doi: 10.1007/s11709-023-0946-1

Abstract: disc cutters of shield machines exhibit unsatisfactory adaptability and performance during the soft–hardrotation state, cutting performance, and adaptability of disc cutters during shield tunneling in soft–hard

Keywords： shield tunneling     disc cutter load     laboratory excavation test     numerical calculation     soft–hard varied    

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Advances in molecular dynamics simulation of ultra-precision machining of hard and brittle materials

Xiaoguang GUO,Qiang LI,Tao LIU,Renke KANG,Zhuji JIN,Dongming GUO

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 1,   Pages 89-98 doi: 10.1007/s11465-017-0412-7

Abstract:

Hard and brittle materials, such as silicon, SiC, and optical glasses, are widely used in aerospaceHowever, these materials display poor machinability because of their hard and brittle properties.Damages such as surface micro-crack and subsurface damage often occur during machining of hard and brittleUltra-precision machining is widely used in processing hard and brittle materials to obtain nanoscaleprovides a review of present research on the molecular dynamics simulation of ultra-precision machining of hard

Keywords： MD simulation     ultra-precision machining     hard and brittle materials     machining mechanism     review    

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Primary cilia in hard tissue development and diseases

Frontiers of Medicine 2021, Volume 15, Issue 5,   Pages 657-678 doi: 10.1007/s11684-021-0829-6

Abstract: Bone and teeth are hard tissues.Hard tissue diseases have a serious effect on human survival and quality of life.mutations present overt changes in the skeletal system, suggesting that primary cilia are involved in hardIn addition, the cilium-related diseases of hard tissue and the manifestations of mutant cilia in theWe believe that all the findings will help with the intervention and treatment of related hard tissue

Keywords： primary cilia     bone     mechanical sensing     hard tissue     cilium-related bone disease     tooth    

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Crystalline mesoporous transition metal oxides: hard-templating synthesis and application in environmental

Zhen MA, Bei ZHOU, Yu REN

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 3,   Pages 341-355 doi: 10.1007/s11783-012-0472-1

Abstract: Mesoporous metal oxides can be synthesized via a soft-templating or hard-templating approach, and thesereview, we summarize the synthesis of mesoporous transition metal oxides using mesoporous silicas as hard

Keywords： mesoporous materials     silica     metal oxide     hard-templating     environmental catalysis    

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Study on Coal Seam Roof Gas Drainage from the Strike of Annular Fracture Areas by the Long Drill Method

Liu Zegong,Yuan Liang,Dai Guanglong,Shi Biming,Lu Ping,Tu Min

Strategic Study of CAE 2004, Volume 6, Issue 5,   Pages 32-38

Abstract:

Gas in working faces is mainly produced in the destressing and desorption process of the coal bed,The coal beds are too soft to carry out bedding drilling and draw gas effectively.Mining in coal beds with gas of high conentration and low permeability and gas suction can be operatodDuring mining activities in the working faces,gas released from roof fracture areas will not flow intoupper corners, so the technically drilling problem in soft coal beds with low permeability and high

Keywords： coal seam     similar material experiment     numerical simulation     gas drainage     annular fracture area    

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Field and laboratory experimental studies on hard-rock tunnel excavation based on disc cutter coupled

Frontiers of Structural and Civil Engineering   Pages 1370-1386 doi: 10.1007/s11709-023-0947-0

Abstract: The tunnel boring machine (TBM) is typically used in hard-rock tunnel excavation.nozzle diameter, and nozzle speed on cutting are investigated via laboratory experiments of cutting hard

Keywords： tunnel boring machine     hard-rock cutting     free face     disc cutter     rock-cutting efficiency    

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Improved CO

Mahboube Ghahramaninezhad, Fatemeh Mohajer, Mahdi Niknam Shahrak

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 3,   Pages 425-435 doi: 10.1007/s11705-019-1873-5

Abstract: capturing was developed via functionalization of zeolitic imidazolate framework-91 (ZIF-91) to generate a hard/hard (metal-oxygen) structure named as lithium-modified ZIF-91 (ZIF-91-OLi compound).

Keywords： hard/hard structure     acidic hydrogen     ZIF-91     carbon capture     ZIF-91-OLi    

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Fragility assessment of wood sheathing panels and roof-to-wall connections subjected to wind loading

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 867-876 doi: 10.1007/s11709-021-0745-5

Abstract: majority of the wind damage resulted from building envelope failure most typically due to the loss of the roofwith a focus on the roofs, fragility analysis can be used to estimate the probability of failure of a roofThus, this paper examines the fragility of specific types of nails, roof-to-wall (RW) connection detailsThe eight fragility models suggest that the safest roof sheathing (RS) is the 1.22 m × 1.22 m sheathing

Keywords： tornadoes     wind loads     low-rise buildings     fragility analysis     risk assessment     structural failures    

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Microstructure investigation of dynamic recrystallization in hard machining: From thermodynamic irreversibility

Binxun LI, Xinzhi ZHANG, Song ZHANG

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 2,   Pages 315-330 doi: 10.1007/s11465-020-0612-4

Abstract: drastically changed thermal, mechanical, and chemical energies within the machined surface layer during hard

Keywords： thermodynamic irreversibility     Helmholtz free energy     microstructure evolution     dynamic recrystallization     hard    

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Title Author Date Type Operation

Full-mechanized caving mining technology of extremely thick and hard coal-seam with hard roof in shallow

Zhang Zhongwen,Wu Jinan

Journal Article

Technology of Coal-Rock Mass Hydraulic Fracture Weakeningand Its Development

Huang Bingxiang,Deng Guangzhe,Liu Changyou

Journal Article

Longwall Top Coal Caving Method and Its Future in China

Zhao Jingche

Journal Article

Design and construction of steel roof truss on top of Three Gorges Project ship lift machine room

Sun Changzhong

Journal Article

Effects of green roof damping and configuration on structural seismic response

Journal Article

Coal seam roof and floor hydrogeology conditions evaluation of Pingshuo No.1 mine and measures of preventing

Zhang Zhongwen,Wu Qiang,Fu Enjun,Fan Zhenli

Journal Article

Analysis of load and adaptability of disc cutters during shield tunneling in soft–hard varied strata

Journal Article

Advances in molecular dynamics simulation of ultra-precision machining of hard and brittle materials

Xiaoguang GUO,Qiang LI,Tao LIU,Renke KANG,Zhuji JIN,Dongming GUO

Journal Article

Primary cilia in hard tissue development and diseases

Journal Article

Crystalline mesoporous transition metal oxides: hard-templating synthesis and application in environmental

Zhen MA, Bei ZHOU, Yu REN

Journal Article

Study on Coal Seam Roof Gas Drainage from the Strike of Annular Fracture Areas by the Long Drill Method

Liu Zegong,Yuan Liang,Dai Guanglong,Shi Biming,Lu Ping,Tu Min

Journal Article

Field and laboratory experimental studies on hard-rock tunnel excavation based on disc cutter coupled

Journal Article

Improved CO

Mahboube Ghahramaninezhad, Fatemeh Mohajer, Mahdi Niknam Shahrak

Journal Article

Fragility assessment of wood sheathing panels and roof-to-wall connections subjected to wind loading

Journal Article

Microstructure investigation of dynamic recrystallization in hard machining: From thermodynamic irreversibility

Binxun LI, Xinzhi ZHANG, Song ZHANG

Journal Article