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Research on Coal Pillar Width in Roadway Driving Along Goaf Based on The Stability of Key Block

Zhengzheng Cao1, Yuejin Zhou1,2

1 State Key Laboratory for Geomechanics & Deep Underground Engineering, School of Mechanics & Civil Engineering, China University of Mining & Technology, Xuzhou 221116, China
2 Corresponding author: Zhou Yuejin. Tel: +86-13914884696. Email: yuejinzh@163.com

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