Study on Shape Characteristics of Plastic Zone in Heterogeneous Roadway-Surrounding Rock
نویسندگان
چکیده
Aiming at the surrounding rock failure of heterogeneous and unequal pressure circular roadways, approximate analytical algorithm plastic zone is proposed. Through comparison calculations numerical simulation, shape characteristics evolution law rock’s are studied, relative error two calculation methods analyzed. The results show following: (1) With an increase or decrease in lateral coefficient, roadway-surrounding presents a circular-ellipse-butterfly change law, outer edge scattered shape, without continuous boundary. (2) In butterfly-shaped zone, butterfly leaf always lies between maximum confining minimum rotates with pressure. (3) There certain amount value solved by positively related to burial depth coefficient roadway negatively strength rock. (4) addition, multi-layer combination larger than that single roadway.
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ژورنال
عنوان ژورنال: Sustainability
سال: 2022
ISSN: ['2071-1050']
DOI: https://doi.org/10.3390/su14159480