Destruction Characteristics and Control Countermeasure of Shaft Surrounding Rock Mass in Complex Geological Environment

Xi Wang (), Zhen Liu, Yuyun Fan, Xingquan Liu, Mingwei Jiang, Li Cheng and Guilin Li
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Xi Wang: Deep Mining Laboratory of Shandong Gold Group Co., Ltd., Laizhou 261442, China
Zhen Liu: Deep Mining Laboratory of Shandong Gold Group Co., Ltd., Laizhou 261442, China
Yuyun Fan: Deep Mining Laboratory of Shandong Gold Group Co., Ltd., Laizhou 261442, China
Xingquan Liu: Deep Mining Laboratory of Shandong Gold Group Co., Ltd., Laizhou 261442, China
Mingwei Jiang: Deep Mining Laboratory of Shandong Gold Group Co., Ltd., Laizhou 261442, China
Li Cheng: Deep Mining Laboratory of Shandong Gold Group Co., Ltd., Laizhou 261442, China
Guilin Li: Deep Mining Laboratory of Shandong Gold Group Co., Ltd., Laizhou 261442, China

Sustainability, 2022, vol. 14, issue 20, 1-11

Abstract: Increasing construction depth, changeable failure formations, and redistributed stress conditions inevitably make the mechanical response of mining shaft rock mass complicated. The design method and construction technology of deep shaft need to be perfected urgently. We studied the stability and control method of a main shaft from −930 m located in a deep gold mine. It is concluded that the surrounding rock of the shaft faces conditions including non-high-stressed, high-stressed, and possible instabilities. The failure types include structural plane-controlled failure, deep stress induced failure, rock burst, low confining pressure shear failure, spalling, and frequent conversion of multiple failure. The damages of the surrounding rock mass at −930~−1500 m displayed “ear-shaped” damage, with damage ranges of less than 2.5 m. The shaft temporary reinforcement adopted bolt mResh beam support, in which the length of the bolt was 2.5~3 m, and the row spacing was 1.5 m. The steel type and diameter were determined by the on-site bolt pull test. This temporary support countermeasure plays an important role in preventing shaft deformation and is worth promoting in similar mines.

Keywords: destruction characteristics; control countermeasures; complex geological environment (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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