Stress Evolution and Deformation Control Technology for Deep Mining Influenced Roadway

Abstract:

In order to effectively control deep roadway under mining influence, based on the typical engineering geological conditions of Dingji coalmine in Huainan mining area, we researched on the laws of stress evolution and failure mechanism of roadway influenced by working face advancing by using numerical simulation and applying field test. The results showed that the surrounding rock stress of roadway ribs increased gradually with face advancing, vertical stress peak transfer to in-depth of roadway surrounding rock, the trend of roadway surface displacement variation consistent with corresponding stress variation. An appropriate coal pillar size (105 m) was proposed. We put forward the basic ideas for surrounding rock controlling and surrounding rock reinforce technology, namely U-steel support back grouting and bolt-cable cooperative supporting. By roadway deformation, roof layer separation and borehole detecting, we found out that displacement of roadway ribs was less than 250 mm, subsidence of roof was less than 110 mm, and the roadway deformation has been effectively controlled.

• Periodical: Applied Mechanics and Materials (Volumes 90-93)
• Pages: 137-145
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.90-93.137
• Online since: September 2011
• Authors: Jia Guang Kan, Nong Zhang, Hai Wei Zhang, Zhi Yi Zhang, Guang Yao Si
• Keywords: Cooperative Loading, Deformation Control Technology, Mining Influenced Roadway, Stress Evolution

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