Qingyuan He
China University of Mining and Technology
PillarCoal miningFiltrationParametric statisticsGeologyDrop (liquid)BrittlenessHomogeneity (physics)Transverse planeDiscontinuity (geotechnical engineering)Composite materialBasaltMining engineeringDiscrete element methodCaveAcoustic emissionCompression (physics)Geotechnical engineeringField (physics)ModulusPerpendicularExtended finite element methodVariablesNatural (archaeology)Block (telecommunications)Ultimate failureHydraulic fracturingDifferential stressProcess analysisMining industryInclination angleStatistical analysisWater flowAeolian sandFuture studiesIn situ stressPower exponentShadow effectFracture propagationLaboratory resultsLaboratory scaleRock mass classificationIgneous rockFracture (geology)Elastic modulusQuasistatic processCoalParticle-size distributionMagnitude (mathematics)Failure mode and effects analysisHomogeneousFlow (psychology)Petroleum engineeringShear (sheet metal)OutflowOrientation (computer vision)Shear (geology)
18Publications
7H-index
176Citations
Publications 13
Newest
#1Qingyuan He (CUMT: China University of Mining and Technology)H-Index: 7
#2Zhibing Liu (CUMT: China University of Mining and Technology)
Last. Danqi Li (Colorado School of Mines)H-Index: 1
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The mechanical characteristics of brittle materials submitted to combined compression and shear loading (CCSL) have received considerable attention recently. Both dynamic and quasi-static CCSL tests have been experimented to simulate the realistic working conditions encountered by different materials. Nevertheless, how the external shear loading affects the microcrack fracturing of rock still excludes explanation. In this paper, a self-developed loading device, instrumented with acoustic emissio...
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Abstract The study of flow behaviour of water-sand mixtures in fractured rocks is of great necessity to understand the producing mechanism and prevention of water inrush and sand gushing accidents. A self-developed seepage test system is used in this paper to conduct laboratory experiments in order to study the influence of the particle size distribution, the void ratio, and the initial mass of Aeolian sand on the flow behavior. It is concluded that the water flow velocity is insensitive to the ...
2 CitationsSource
#1Qingyuan He (CUMT: China University of Mining and Technology)H-Index: 7
#1Qingyuan He (CUMT: China University of Mining and Technology)
Last. Boyang ZhangH-Index: 1
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Understanding the hydraulic fracture (HF) re-orientation mechanism from artificial weaknesses is critical to screen-out prevention in the petroleum industry and caveability management in the mining industry. An improved discrete element method is proposed and incorporated in the Universal Distinct Element Code (UDEC) to simulate hydraulic fracturing in heterogeneous rocks, and its reliability is validated against previous laboratory experiments. The effects of rock heterogeneity and rock strengt...
1 CitationsSource
#1Qingyuan He (CUMT: China University of Mining and Technology)H-Index: 7
#2Yingchun Li (DUT: Dalian University of Technology)H-Index: 12
Last. Chengguo Zhang (UNSW: University of New South Wales)H-Index: 12
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Abstract Coal pillars are usually loaded under combined compression-shear stresses at underground coal mines. Their long-term stability is critical to the utilization of underground structures, such as underground reservoirs at coal mines. In this study, a modified rock property testing system was used to explore the mechanical properties of coal specimens under quasi-static combined compression-shear loading conditions. The acoustic emission technique was applied to investigating the microcrack...
4 CitationsSource
#1Qingyuan He (CUMT: China University of Mining and Technology)H-Index: 7
#2Yingchun Li (DUT: Dalian University of Technology)H-Index: 12
Last. Chengguo Zhang (UNSW: University of New South Wales)H-Index: 12
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Mechanical responses of rocks to combined compression and shear have attracted increasing attention but still lack comprehensive understanding. Sixty-eight laboratory tests are conducted on basalt and granite specimens sourced from different origins to generalize the effects of specimen inclination on the mechanical properties of igneous rocks. A novel regression model is established to predict peak strength and elastic moduli of igneous specimens at various inclination angles. The model mechani...
21 CitationsSource
#1Qingyuan He (CUMT: China University of Mining and Technology)H-Index: 7
#2Yingchun Li (DUT: Dalian University of Technology)H-Index: 12
Last. Sa She (UNSW: University of New South Wales)H-Index: 1
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11 CitationsSource
#1Rui WuH-Index: 1
#2Qingyuan HeH-Index: 7
Last. Chengguo ZhangH-Index: 12
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7 CitationsSource
#1Qingyuan He (UNSW: University of New South Wales)H-Index: 7
#2F. T. Suorineni (UNSW: University of New South Wales)H-Index: 12
Last. Joung Oh (UNSW: University of New South Wales)H-Index: 13
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Abstract Cave mining has become a popular underground mass mining method and extends its applications to more component orebodies at depths. To ensure continuous cave propagation, effective pre-conditioning of the orebody to improve its caveability and fragmentation sizes is essential. Hydraulic fracturing has been used as a pre-conditioning method in cave mining by creating artificial fractures in the orebody. In a previous study, the requirement for creating orientation-controllable hydraulic ...
10 CitationsSource
#1Qingyuan HeH-Index: 7
#2Jinhai XuH-Index: 2
Last. Chengguo ZhangH-Index: 12
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3 CitationsSource
#1Qingyuan He (UNSW: University of New South Wales)H-Index: 7
#2F. T. Suorineni (UNSW: University of New South Wales)H-Index: 12
Last. Joung Oh (UNSW: University of New South Wales)H-Index: 13
view all 3 authors...
The cave mining method was traditionally applied to massive low-grade, weak orebodies at shallow depths (less than 500 m) that favour cave propagation under gravity. Currently, this method is being applied to stronger orebodies and is taking place at depths of up to 2000 m below the surface. To ensure continuous cave propagation, preconditioning of the orebody is essential in this latter caving environment to improve rock mass caveability and to decrease fragmentation sizes. Hydraulic fracturing...
11 CitationsSource