Numerical modelling of the effects of weak immediate roof lithology on coal mine roadway stability

Coggan, John; Gao, Fuqiang; Stead, Doug; Elmo, Davide

doi:10.1016/j.coal.2011.11.003

Cited by 171 publications

(55 citation statements)

References 17 publications

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“…A great number of tasks to solve are focused on studying specifics of stress-strain state (SSS) of the massif (for instance, Prusek, 2010;Manoj, 2010;Yu, Kong, Niu, Zhu, & Jing, 2013;Coggan, Gao, Stead, & Elmo, 2012), the choice of technological parameters for mineral deposits' mining (Zhang, Zhang, Hou, Wu, & Zhou, 2014;Shi, Liu, & Wang, 2015) and improvement of constructive schemes of mine workings support, including resourcesaving ways of strengthening the marginal massif by anchor support (Manoj, 2010;Yu, Kong, Niu, Zhu, & Jing, 2013;Coggan, Gao, Stead, & Elmo, 2012;Garg & Jaiswal, 2015;Franklin, Fraley, & Burnham, 1974).…”

Section: Introductionmentioning

confidence: 99%

Numerical methods of geomechanics tasks solution during coal deposits’ development

Bondarenko¹,

Hardygóra²,

Symanovych³

et al. 2016

Min. miner. depos.

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Purpose. Generalization of numerical modeling of geomechanical processes in the vicinity of mine workings by finite elements method and making recommendations for substantiation of suitable construction and behavior of rock massif physical model. Methods.Software packages SolidWorks Simulation (COSMOS/М) and ANSYS are used for geomechanical tasks solution.Findings. Solutions of geomechanical tasks dealing with topical issues of estimating stress-strain state of rock massif around underground workings of different functions are given. Data on the rock massif stress-strain state are received and recommendations on adequate and authentic reflection of its structural peculiarities (stratification and fracturing) are made. Physical model of rock condition (elastic, elastic-plastic, rheological diagrams and complete diagram of deformation taking into account weakening and fracturing) is presented.Originality. New data about the mechanism of movement processes of coal-bearing massif around mine workings considering stratification and cracks content, limit and out-of-limit deflection state in separate areas, and also the impact of rheological rock properties are received.Practical implications. Complex of geomechanical tasks solutions allow to increase credibility of rock pressure manifestations prediction and substantiate technical solutions for effective and safe operations at coal mines.

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Section: Introductionmentioning

confidence: 99%

Numerical methods of geomechanics tasks solution during coal deposits’ development

Bondarenko¹,

Hardygóra²,

Symanovych³

et al. 2016

Min. miner. depos.

View full text Add to dashboard Cite

show abstract

“…Numerical simulations which can overcome some complicated problems in the analytic method are widely used in engineering and theoretical analysis [7,23]. 3DEC, is developed by Itasca Consulting Group Inc., which based on discrete element method to describe the discrete media behavior [13].…”

Section: Analysis Of Fracture Failure Processed In the Main Roofmentioning

confidence: 99%

Fracture failure analysis of hard–thick sandstone roof and its controlling effect on gas emission in underground ultra-thick coal extraction

Wei

Wang

et al. 2015

Engineering Failure Analysis

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“…Bai et al revealed the law of crack expansion of surrounding rock and the failure process of bolt and anchor cable under the rich water layer by numerical calculation method. John et al adopted finite element method and discrete element method to reveal the roof failure process of coal roadway under high stress and soft immediately roof. They put forward that the roof separation was mainly subjected to shear failure.…”

Section: Introductionmentioning

confidence: 99%

Failure mechanism of the large‐section roadway under mined zones in the ultra‐thick coal seam and its control technology

Tai

Xia

Meng

et al. 2019

Energy Science & Engineering

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Aiming at serious deformation and failure of large‐section coal roadway under mined zones in ultra‐thick coal seam, its deformation and failure characteristics are analyzed based on the field measurement. This paper reveals the mechanism of roadway roof separation, roof leakage, and right rib extrusion. Based on the mechanism, two kinds of secondary support schemes are proposed, that is, “grouting + I‐steel support + bolt” (scheme I) and “grouting + U steel support + anchor + anchor cable” (scheme II). The industrial experiment is carried out at 1070 auxiliary transportation roadway in Tashan Coal Mine. The measured results show that the roadway roof separations of the secondary support scheme I and II are only 1/11 and 1/46 of the original support scheme, respectively, while the lateral displacements of the roadway are only 1/7 and 1/44 of the original support scheme. It could be seen that the deformation and failure of the roadway surrounding rock have been well controlled.

show abstract

Numerical modelling of the effects of weak immediate roof lithology on coal mine roadway stability

Cited by 171 publications

References 17 publications

Numerical methods of geomechanics tasks solution during coal deposits’ development

Numerical methods of geomechanics tasks solution during coal deposits’ development

Fracture failure analysis of hard–thick sandstone roof and its controlling effect on gas emission in underground ultra-thick coal extraction

Failure mechanism of the large‐section roadway under mined zones in the ultra‐thick coal seam and its control technology

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