Qingsheng Bai
Freiberg University of Mining and Technology
Coal miningGeologyEngineeringLongwall miningMining engineeringDiscrete element methodPermeability (earth sciences)Geotechnical engineeringMaterials scienceRoofOverburdenNumerical modelingCompressive strengthExcavationRock mass classificationFracture (geology)Computer simulationCoalSpallAquiferPetroleum engineeringStress (mechanics)
36Publications
14H-index
767Citations
Publications 27
Newest
#1Cun Zhang (CUMT: China University of Mining and Technology)H-Index: 16
#2Shihao Tu (CUMT: China University of Mining and Technology)H-Index: 19
Last. Lei Zhang (CUMT: China University of Mining and Technology)H-Index: 12
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Abstract Pressure-relief coal mine methane (CMM) surface gas venthole (SGV) has been successfully implemented and accepted as a CMM exploitation and outburst prevention technology. This includes the post-drainage of the protective seam, as well as the pre-drainage of the protected seam with low permeability that is affected by the pressure relief caused by the protective seam mining. Thus, it is important to understand the correlation between the pressure-relief mining and the SGV. Based on this...
52 CitationsSource
#1Qingsheng Bai (CUMT: China University of Mining and Technology)H-Index: 14
#2Shihao Tu (CUMT: China University of Mining and Technology)H-Index: 19
Last. Tu Hongsheng (CUMT: China University of Mining and Technology)H-Index: 9
view all 4 authors...
Abstract Against the background of analyzing coal wall stability in 14101 fully mechanized longwall top coal caving face in Majialiang coal mine, based on the torque equilibrium of the coal wall, shield support and the roof strata, an elastic mechanics model was established to calculate the stress applied on the coal wall. The displacement method was used to obtain the stress and deformation distributions of the coal wall. This study also researched the influence of support resistance, protectiv...
13 CitationsSource
#1Qingsheng Bai (CUMT: China University of Mining and Technology)H-Index: 14
#2Shihao Tu (CUMT: China University of Mining and Technology)H-Index: 19
Last. Yong Yuan (CUMT: China University of Mining and Technology)H-Index: 6
view all 5 authors...
In China, as the shearer cutting height increases in longwall face, serious coal wall failure and spallings occur often, especially for brittle coal seam, which leads to large block spallings, equipment damage, and casualties. In this paper, 2D finite difference models are constructed, aiming to exam the brittle failure of coal wall during longwall mining in Majialiang coal mine, Shuozhou, China. The strain-softening constitutive model is used to reveal the brittle failure characteristics of the...
39 CitationsSource
#1Qingsheng Bai (CUMT: China University of Mining and Technology)H-Index: 14
#2Shihao Tu (CUMT: China University of Mining and Technology)H-Index: 19
Last. Yong Yuan (CUMT: China University of Mining and Technology)H-Index: 6
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There exists a trend in China that high productivity longwall face which produces 8.0–10.0 million tons of raw coal per annum is widely employed. The stability of the gateroads during the life of longwall mining is the main concern of the success of high-production longwall face. After a gateroad is driven into rock strata, the primary equilibrium state is disturbed and, as a result, the surrounding rocks are unavoidably broken or fractured (Dong et al. 1994). The extent of the fractured zones m...
18 CitationsSource
#1Youxi Zhang (CUMT: China University of Mining and Technology)H-Index: 1
#2Shihao Tu (CUMT: China University of Mining and Technology)H-Index: 19
Last. Jianjun LiH-Index: 1
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Abstract Considering the danger of water inrush in mining very thick coal seam under water-rich roof in Majialiang Coal Mine, the universal discrete element (UDEC) software was used to simulate the overburden fracture evolution laws when mining 4# coal seam. Besides, this study researched on the influence of face advancing length, speed and mining height on the height of the water flowing fractured zones (HWFFZ), and analyzed the correlation of face advancing length and change rules of aquifer w...
32 CitationsSource
#1Fangtian Wang (UOW: University of Wollongong)H-Index: 12
#2Shihao Tu (CUMT: China University of Mining and Technology)H-Index: 19
Last. Qingsheng Bai (CUMT: China University of Mining and Technology)H-Index: 14
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Synopsis In China, thin coal seams are rich in resources but are technically challenging. The mineable reserves in these seams account for 20.4% of the total coal resources, while the current production accounts for only 10.4% of the total annual production. Characteristics such as narrow mining space, low level of mechanization, poor working environment, and high cost of mining, restrict the development of mining safety and efficiency. Recently, fully mechanized mining technology has developed ...
10 Citations
#1Shihao TuH-Index: 19
#2Fangtian WangH-Index: 12
Last. Qingsheng BaiH-Index: 14
view all 5 authors...
In China, thin coal seam are rich in resources and complex in conditions, however, the characteristics such as narrow mining space, the low level of mechanised technology, bad working environment and the high cost of mining, directly restrict the development of mining safety and high-efficiency. In thin coal seams with hard gangue which contains concretions of pyrite, LS-DYNA is applied to calculate the rational blasting parameters and carry out the deep-hole pre-splitting blasting technology, t...
1 Citations