Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Study on Evolution of Front Abutment Pressure at Working Face in Repeated Mining of Close-Distance Coal Seams
In order to determine the reasonable width of a stopping coal pillar in close-distance coal seams, the evolution law of front abutment pressure of the working face with repeated mining was studied. Based on the actual engineering project, we conducted field measurement, theoretical analyses, numerical simulations and a physical similarity simulation test to study. The results show that: (1) according to field measurement, the influence range of front abutment pressure increases from 60 m to 75 m with repeated mining; (2) according to theoretical analysis, the arch height and span are negatively and positively correlated with the influence range of front abutment pressure, respectively; (3) with repeated mining, the arch height increased to 165 m, the arch span to 235 m and the influence range to 83.5 m by 14.5 m relative to that before repeated mining; (4) if it is necessary to ensure that the main roadway is less affected by the mining stress, the width of the stopping coal pillar in 2214 working face should be greater than 80 m. The influence range of front abutment pressure increases obviously with repeated mining in close-distance coal seams. The study provides a reference for similar engineering projects.
Study on Evolution of Front Abutment Pressure at Working Face in Repeated Mining of Close-Distance Coal Seams
In order to determine the reasonable width of a stopping coal pillar in close-distance coal seams, the evolution law of front abutment pressure of the working face with repeated mining was studied. Based on the actual engineering project, we conducted field measurement, theoretical analyses, numerical simulations and a physical similarity simulation test to study. The results show that: (1) according to field measurement, the influence range of front abutment pressure increases from 60 m to 75 m with repeated mining; (2) according to theoretical analysis, the arch height and span are negatively and positively correlated with the influence range of front abutment pressure, respectively; (3) with repeated mining, the arch height increased to 165 m, the arch span to 235 m and the influence range to 83.5 m by 14.5 m relative to that before repeated mining; (4) if it is necessary to ensure that the main roadway is less affected by the mining stress, the width of the stopping coal pillar in 2214 working face should be greater than 80 m. The influence range of front abutment pressure increases obviously with repeated mining in close-distance coal seams. The study provides a reference for similar engineering projects.
Study on Evolution of Front Abutment Pressure at Working Face in Repeated Mining of Close-Distance Coal Seams
Fulian He (Autor:in) / Liang Li (Autor:in) / Kai Lv (Autor:in) / Binbin Qin (Autor:in) / Xuhui Xu (Autor:in) / Qing Ma (Autor:in) / Yongqiang Chen (Autor:in)
2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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Pressure-Relief Mining of the Working Face Under the Coal Pillar in the Close Distance Coal Seams
| Online Contents | 2016
Pressure-Relief Mining of the Working Face Under the Coal Pillar in the Close Distance Coal Seams
| Online Contents | 2016
Pressure-Relief Mining of the Working Face Under the Coal Pillar in the Close Distance Coal Seams
| British Library Online Contents | 2016
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