Results 81 to 90 of about 1,653 (136)
International Journal of Mining Science and Technology, 2015 Abstract The soft rock’s heterogeneity and nonlinear mechanical behavior cause extremely difficult maintenance on the soft rock roadway. Aiming at the asymmetric deformation and destruction phenomenon appearing after excavating and supporting the 7101 air return way in Meihe mine, this paper comprehensively adopted a variety of methods to analyze the
Yang Yu +4 more
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Applied SciencesSpatially intersecting roadways in mines are prone to stress concentration due to disturbances during mining operations, which significantly affects the stability of the inter-roadway surrounding rock between the roadways. Analyzing the stability of underlying roadways under the influence of disturbances from overlying roadways, as well as enhancing ...
Pei Zhang +4 more
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Scientific ReportsAbstract The effects of rock softening and shear dilation in the plastic zone are considered to examine the stability of surrounding rock in deep, weakly cemented soft rock roadways. An elastic-soft fracture mechanical model of the surrounding rock is developed, from which the analytical solutions for the stress and displacement fields are ...
Zhang, Jihua +8 more
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Geomechanics and Geophysics for Geo-Energy and Geo-ResourcesAbstract The mine disaster's essence is the accumulation and release of surrounding rock's energy. By focusing on the full cycle process of rectangular roadway's “excavation-deformation-instability” in a deep non-isobaric stress environment, the mechanical equations of surrounding rock's each part's energy in the elastic/plastic stage ...
Yunliang Tan +5 more
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Energy Science & EngineeringAddressing the challenges of surrounding rock control in gob‐side entry driving near an advancing working face affected by adjacent working faces and gobs, taking 5104 return airway of No.1 well in Checun Coal Mine as the background, using theoretical ...
Delong Cui +6 more
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Stability control of roadway surrounding rocks under repeated mining: a case study
Scientific ReportsRepeated mining makes the deformation and failure of roadway surrounding rocks more complex than those under single-seam conditions. To address the large deformation and support failure in the 40,111 roadway of the Dafosi Coal Mine, this study combined theoretical calculations and numerical simulations to analyze the evolution of stress, displacement ...
Wang, Tong +6 more
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Study on the in-situ modified support method of roadway surrounding rock under vertical impact load
Scientific ReportsWith the deepening of coal mining, the frequency and intensity of rock burst accidents are increasing. According to incomplete statistics, there have been over 200 rock burst accidents in tunnels in China alone from 2005 to 2024, resulting in more than ...
Heng Zhang +11 more
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Analysis and discussion on testing methods of broken rock zone of surrounding rock of roadway
Gong-kuang zidonghua, 2014 The paper introduced different testing methods and testing theories for broken rock zone of surrounding rock of roadway, discussed and analyzed advantages and disadvantages and scope of application of the different testing methods. By comparison, it got conclusion as follows: technology of the acoustic method is advanced and testing method is simple ...
CAI Guannan +3 more
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Influences of Fault on the Stability of Surrounding Rocks in Roadways of Mines
Journal of Engineering Science and Technology Review, 2019 Zhongsi Dou +3 more
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Applied SciencesTo reveal the deformation patterns of the surrounding rock in deeply buried straight-wall arch-shaped roadways under seepage action, this study, based on an FLAC3D numerical simulation and classic elastoplastic theory, investigates the influences of ...
Xuebin Xie, Liang Li
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