Soft broken surrounding rock exhibits obvious rheological properties and time-dependent weakening effects under the action of deep high-ground stress, leading to the increasingly prominent problem of sustained large deformation in deep roadways. In this study, with the II5 Rail Rise in Zhuxianzhuang Coal Mine as an example, the mechanism and control technology of time-dependent damage and instability in a deep soft-rock roadway were explored through a field observation and numerical simulation. The research results show that the range of the loose circle in the deep fractured surrounding rock can reach 3.0 m. The expansion of shallow and deep cracks causes the primary plastic deformation and secondary rheological deformation of the surrounding rock, with the rheological deformation rate increasing by 21.4% every 55 days on average, which ultimately induces the instability and failure of the surrounding rock. Based on the mechanism of roadway instability, a control technology of high-preload bolt + deep- and shallow-borehole crack filling was proposed. The technology reduces deformation and ensures the stability of the roadway surrounding rock by inhibiting the propagation of deep and shallow cracks and reinforcing the surrounding rock.
机构:
China Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R China
China Univ Min & Technol Beijing, Beijing Key Lab Precise Min Intergrown Energy & Re, Beijing 100083, Peoples R ChinaChina Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R China
He, Fulian
Zhai, Wenli
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China Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R ChinaChina Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R China
Zhai, Wenli
Xu, Xuhui
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China Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R ChinaChina Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R China
Xu, Xuhui
Song, Jiayu
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China Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R ChinaChina Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R China
Song, Jiayu
Li, Liang
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China Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R ChinaChina Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R China
Li, Liang
Lv, Kai
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China Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R ChinaChina Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R China
机构:
China Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R China
China Univ Min & Technol Beijing, Beijing Key Lab Precise Min Intergrown Energy & Re, Beijing 100083, Peoples R ChinaChina Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R China
He, Fulian
Zhai, Wenli
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h-index: 0
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China Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R ChinaChina Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R China
Zhai, Wenli
Xu, Xuhui
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China Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R ChinaChina Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R China
Xu, Xuhui
Song, Jiayu
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机构:
China Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R ChinaChina Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R China
Song, Jiayu
Li, Liang
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机构:
China Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R ChinaChina Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R China
Li, Liang
Lv, Kai
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China Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R ChinaChina Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R China