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

Sen Yang | Zendy; Xinzhu Hua | Zendy; Liu Xiao | Zendy; Chen Li | Zendy

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

Author(s) -

Sen Yang,

Xinzhu Hua,

Liu Xiao,

Chen Li

Publication year - 2021

Publication title -

shock and vibration

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.418

H-Index - 45

eISSN - 1875-9203

pISSN - 1070-9622

DOI - 10.1155/2021/2271257

Subject(s) - roof , excavation , geotechnical engineering , safety factor , ultimate tensile strength , engineering , coal mining , mining engineering , geology , structural engineering , coal , materials science , metallurgy , waste management

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.

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