Qiang Sun
China University of Mining and Technology
Coal miningGeologyEngineeringComposite materialMining engineeringPermeability (earth sciences)Geotechnical engineeringMaterials scienceMineralogyWater contentRoofThermal damageCompressive strengthHydrogeologyThermal diffusivityAtmospheric temperature rangeEnvironmental scienceElastic modulusGroundwater-related subsidenceCoalPorosityAquiferMicrostructureThermal conductivity
72Publications
22H-index
1,306Citations
Publications 72
Newest
#1Qiang Sun (CUMT: China University of Mining and Technology)H-Index: 22
#2Jixiong Zhang (CUMT: China University of Mining and Technology)H-Index: 22
Last. Yanli Huang (CUMT: China University of Mining and Technology)H-Index: 12
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Safety assessments of conventional coal mining under aquifers mainly use the height of the water-conducting zone (HWCZ) above the mining panel as the empirical safety criterion. However, this criterion alone fails to account for mining-induced permeability and porosity variations of key aquiclude strata (KAS) in backfill mining. Backfilling can compact and close developed fractures in the KAS, making it less permeable. In this paper, based on an analysis of KAS’s regional geological and hydrogeo...
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#2Qiang SunH-Index: 22
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Gradual instability of coal pillars left behind underground with room mining is one of the main reasons for sudden roof caving in the gob, surface subsidence, and other significant hazards. Moreover, room mining implies great losses of coal resources. In this paper, the main failure mode and room mining coal pillar process were analyzed according to the coalfield regional engineering geological and hydrogeological conditions. A numerical model was adopted to study the effect of different sizes o...
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#1Dan Ma (CUMT: China University of Mining and Technology)H-Index: 26
#2Jixiong Zhang (CUMT: China University of Mining and Technology)H-Index: 22
Last. Nan Zhou (CUMT: China University of Mining and Technology)H-Index: 16
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Gangue backfilling mining (GBM) can effectively alleviate the gangue accumulation pollution and the overburden aquifer destruction. To efficiently evaluate the reutilization of gangue wastes by GBM and its advantage in overburden aquifer protection, non-Darcy hydraulic properties and deformation behaviors of granular gangues were studied through laboratorial, theoretical, and in-situ aspects. A series of compression and seepage tests on granular gangues under the variable original grain size gra...
39 CitationsSource
#1Xusheng Yan (Xi'an University of Science and Technology)
#2Zhao Duan (Xi'an University of Science and Technology)
Last. Qiang Sun (CUMT: China University of Mining and Technology)H-Index: 22
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In recent years, with the development of geothermal resources, the thermal conductivity of soil has become a research hotspot. In this study, the thermal conductivity measured by the transient plane heat source method was used to evaluate five common thermal conductivity models from the previous literature. The influences of water content and salt content on the internal heat transfer mode of this soil are explored. It was found that the presence of water in soil changes the conventional mode of...
1 CitationsSource
#1Qiang Sun (CUMT: China University of Mining and Technology)H-Index: 22
#2Meng Guohao (CUMT: China University of Mining and Technology)H-Index: 1
Last. Jixiong Zhang (CUMT: China University of Mining and Technology)H-Index: 22
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Solid backfill coal mining technology can be safely and efficiently used to exploit coal resources under aquifers, without causing harm to the water resources and the environment. Nevertheless, the mechanism of fracture development and seepage channel or pathway control in the key aquiclude strata (KAS) in backfill coal mining under fluid–solid coupling have not been studied. Based on the similarity theory of fluid–solid coupling physical simulation, this study involves experimental evaluation o...
2 CitationsSource
#1Qiang Sun (CUMT: China University of Mining and Technology)H-Index: 22
#2Jixiong Zhang (CUMT: China University of Mining and Technology)H-Index: 22
Last. Nan Zhou (CUMT: China University of Mining and Technology)H-Index: 16
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Abstract Coal production safety and protection of water resources in coal mines located under aquifers requires an in-depth analysis of key aquiclude strata (KAS), including their physical, mechanical, and seepage characteristics. Based on hydrogeological conditions of thickness and buried depth of coal seam, thickness and water abundance of the aquifer, KAS thickness, etc., the experimental comprehensive testing method of mechanical and permeability parameters of KAS in the Wugou Coal Mine, Chi...
2 CitationsSource
#1Qiang Sun (CUMT: China University of Mining and Technology)H-Index: 22
#2Jixiong Zhang (CUMT: China University of Mining and Technology)H-Index: 22
Last. Wei YinH-Index: 5
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In solid backfilling mining, gangue and other solid materials are backfilled into the gob to restrain the roof subsidence. As a result, instead of being subjected to periodic collapse, the overlying strata will be able to maintain its integrity and bend or sink as a whole with partial fracture and failure, thus facilitating the gob-side entry to retain. To study the mechanical deformation characteristics and failure mechanism of such gob-side supporting wall, this research analyzes the structure...
9 CitationsSource
#1Qiang Sun (CUMT: China University of Mining and Technology)H-Index: 22
#1Qiang Sun (CUMT: China University of Mining and Technology)H-Index: 3
Last. Meng Li (CUMT: China University of Mining and Technology)H-Index: 12
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This study addresses the major geo-environmental hazards caused by shallow coal mining in China9s western eco-environment frangible area. These hazards are related to the high overburden pressure, surface subsidence, soil and water losses, and land desertification, with consequent vegetation and wildlife losses. To mitigate these hazards, three alternative backfill mining methods are proposed, for three typical shallow coal mining conditions, using aeolian sand-based backfilling materials, which...
3 CitationsSource
#1Jixiong Zhang (CUMT: China University of Mining and Technology)H-Index: 22
#2Qiang Sun (CUMT: China University of Mining and Technology)H-Index: 22
Last. Xu Zhao (UWA: University of Western Australia)H-Index: 1
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When mining coal below aquifers, the height of the water-conducting zone above the mine panel is widely used as one of the main criteria in assessing mine safety. However, its direct application to backfill mining is quite problematic, and alternative approaches have to be used to more accurately reflect the relevant processes. The compaction characteristics and seepage behavior in crushed key aquiclude strata were experimentally investigated by analyzing the hydrogeological characters of aquicl...
5 CitationsSource
#1Qiang Sun (CUMT: China University of Mining and Technology)H-Index: 22
#2Jianjun Hu (CUMT: China University of Mining and Technology)H-Index: 1
Abstract Thermal diffusivity is an important physical parameter for assessing thermal damage to granite. In this paper, hornblende granite and alkaline granite were subjected to cooling and heating cycles at different temperatures. The quenching cycles of hornblende granite are 1, 5, 10, 15 and 20 times between 250 °C and 650 °C. The quenching cycle of the alkaline granite is 1, 5, 10 and 15 times in the range of 250 °C–450 °C, respectively. The thermal diffusivity of the two types of granite wa...
8 CitationsSource