Asymmetrical Support Technology for Dynamic Pressure Roadway: A Case Study from Guotun Coal Mine in China

作者：Zhang, Jinpeng; Liu, Limin^*; Yan, Xu; Li, Yanhui

来源：Geotechnical and Geological Engineering, 2019, 37(2): 823-832.

DOI：10.1007/s10706-018-0652-2

• Asymmetric support scheme
• Deformation of surrounding rock
• Dynamic pressures
• Engineering applications
• Field observations
• Roadway surrounding rock
• Support technology
• Surrounding rock structures

To form a kind of support technology that was universally applicable to all kinds of dynamic pressure roadways, This paper proposes asymmetrical support technology for dynamic pressure roadway. Firstly, the asymmetry characteristics of surrounding rock structure and stress distribution in dynamic pressure roadway were analyzed. The mechanism of asymmetric support technology for dynamic pressure roadway was preliminarily explored. Taking the 1303 dynamic pressure roadway in Guotun Coal Mine as the engineering background, the coal pillar width and support parameter were determined by numerical simulation and theoretical analysis. In the asymmetric support scheme, the roof bolts and the side bolts are respectively Φ20 ×2200 and Φ20 ×2000 mm, the spacing-discharge distance of roof bolts, coal pillar side bolts and coal body side bolts are respectively 800 ×900, 600 ×900 and 800 ×900 mm. Through field observation, the overall deformation of roadway surrounding rock supported by the asymmetric support scheme was not large and the deformation of the roof, coal pillar side and coal body side were basically equal. So, this asymmetric support technology can effectively control the deformation of surrounding rock in dynamic pressure roadway.

• 出版日期2019
• 单位山东科技大学