Analysis of Stability Factors of Roadway Roof and Determination of Unsupported Roof Distance

To determine the impact of influencing factors on unsupported roof stability in coal mine roadway, a mechanical model of the unsupported roof was built. FLAC 3D numerical simulation was utilized to study the stability of the unsupported roof under the influence of the depth of the roadway, the thick...

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Bibliographic Details
Published inShock and vibration Vol. 2021; no. 1
Main Authors Yang, Sen, Hua, Xinzhu, Liu, Xiao, Li, Chen
Format Journal Article
LanguageEnglish
Published Cairo Hindawi 2021
Hindawi Limited
Wiley
Subjects
Boundary conditions
Coal mines
Coal mining
Deformation
Excavation
Geology
Lithology
Mathematical models
Roads
Roads & highways
Roofs
Safety factors
Simulation
Stability analysis
Tensile strength
Tensile stress
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Summary:To determine the impact of influencing factors on unsupported roof stability in coal mine roadway, a mechanical model of the unsupported roof was built. FLAC 3D numerical simulation was utilized to study the stability of the unsupported roof under the influence of the depth of the roadway, the thickness of the roof, and the unsupported-support distance. In view of the key influencing factors, the geological conditions of the site, and the relationship between the tensile stress and tensile strength of the unsupported roof, the maximum unsupported roof distance during roadway excavation was determined. Considering the surplus safety factor of the unsupported roof, the reasonable unsupported roof distance during the excavation of roadway 150802 was finally determined to be 2.08 m. The comprehensive roadway excavation speed increased by 62.7%, achieving a monthly progress over 500 m.
ISSN:1070-9622
1875-9203
DOI:10.1155/2021/2271257