Results 141 to 150 of about 2,631 (179)

Research on stability analysis and control technology of roadways in the underlying isolated island working face. [PDF]

Sci Rep
Gao X, Wang Y, Li YM.
europepmc   +1 more source

Energy Evolution Law during Failure Process of Coal–Rock Combination and Roadway Surrounding Rock

Minerals (Basel, Switzerland), 2022
The deformation and failure of a coal–rock system in a deep environment is affected by its own mechanical properties, natural endowments, and geological structures; it is very important to study the energy evolution law of coal–rock systems. For this purpose, a Particle Flow Code in 2 Dimensions (PFC2D) simulation was conducted to assess the coal–rock ...
Dongxiao Zhang, Wei-Yao Guo, Tongbin Zhao   +2 more
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Development of fractures in soft rock surrounding a roadway and their control

Mining Science and Technology (China), 2011
Abstract As the excavation of roadway, new fractures will be formed and the pre-existing fractures extend with the redistribution of stress in surrounding rocks. Eventually, fracture zone and bed separation are formed in rocks because of the developed fractures.
Xuehua Li, Qiangling Yao, Jiankang Man, Chaoqun Chen, Lihui He   +4 more
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Surrounding Rock Classification in Deep Roadway of Coal Mine

Advanced Materials Research, 2011
With the increase of mining depth，most coals in China have been deep mining stage. Compared to the shallow roadway, the characteristics of deformation-failure of surrounding rock show significant differences in the deep roadway, and the deep rock features of the surrounding rock are not considered in the traditional classification of roadway.
Bin Liu, Quan Sheng Liu
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Influence of Rock Burst and Other Disasters on Stability of Surrounding Rock of Roadway

Geotechnical and Geological Engineering, 2017
In this paper, selecting 3 levels and 6 factors with an orthogonal test approach to investigate the stability of roadway surrounding rock under dynamic disturbance. The intuitive analysis results show that the main factors that affect the roadway deformation is period, followed by the location, lateral pressure coefficient, amplitude and buried depth ...
Yushun Yang, Sijiang Wei, Dongming Zhang
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Deformation characteristics of surrounding rock of broken and soft rock roadway

Mining Science and Technology, 2009
Abstract A similar material model and a numerical simulation were constructed and are described herein. The deformation and failure of surrounding rock of broken and soft roadway are studied by using these models. The deformation of the roof and floor, the relative deformation of the two sides and the deformation of the deep surrounding rock are ...
Jin-xi WANG, Ming-yue LIN, Duan-xin TIAN, Cun-liang ZHAO   +3 more
exaly   +2 more sources

Applying Neural Network to Predict Roadway Surrounding Rock Displacement

2020 5th International Conference on Intelligent Informatics and Biomedical Sciences (ICIIBMS), 2020
Apply artificial intelligence methods to solve underground engineering problems. First, the factors affecting the displacement of the surrounding rock of the mine roadway are analyzed, and the four indexes that affect the displacement of the roadway are used as the input layer of the neural network. Then, the approach rate of the roadway is used as the
TANG Jun-Yi, ZHANG Min, ZHANG Miao, YU Wan-Jun, TIAN Yu   +4 more
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FAILURE CHARACTERISTICS OF SURROUNDING ROCKS IN COAL SEAM MINING ROADWAY

Bilimsel Madencilik Dergisi, 2022
In order to provide technical support for grouting engineering of broken surrounding rock in roadway. Taking a certain mine in Jin coal mine area as a test mine, drilling TV and segmented water injection tests were used to detect the damage characteristics of surrounding rocks, and the numerical simulation of stress characteristics during the failure ...
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Risk Analysis and Extension Assessment for the Stability of Surrounding Rock in Deep Coal Roadway [PDF]

International Journal of Environmental Research and Public Health, 2019
In order to evaluate the surrounding rock stability of deep roadways, the diversity of accident hazard sources in deep coal mining is statistically analyzed. To conduct an effective evaluation, first, the risk analysis of the factors affecting the rock mass accidents is carried out, and the comprehensive safety index system of rock accidents in deep ...
Dongmei Huang, Xikun Chang
exaly   +3 more sources

Parameter Optimization on Bolt Supporting of Deep Roadway Surrounding Rock

Advanced Materials Research, 2013
Aimed at the parameter optimization problem of bolt supporting in deep high stress roadway surrounding rock, by the numerical simulation method, support schemes were evaluated and optimized on north wing blind incline shaft in Shi-shang Mine. Based on original support scheme and considering the bolt spacing, row spacing and length, twenty programs were
Yan Kai Zhang, Wei Jian Yu
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