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| Practice of grouting reinforcement and support for surrounding rock of deep renovation roadway in Yangdong Mine |
| Guan Weiwei, Zhang Zhiming |
| Yangdong Mine of Jizhong Energy Fengfeng Group, Handan 056200, China |
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Abstract Taking the 160 m renovation section in the middle of No.52 track roadway in Yangdong Mine as the research object, aiming at the surrounding rock structure of roadway, the damage degree and damage range of surrounding rock of roadway were observed by drilling peep instrument, which provided scientific basis for grouting reinforcement design of roadway renovation. Focusing on the joint action of ' support body-surrounding rock ', the full-section grouting reinforcement of roadway was used to control the deformation of surrounding rock. The grouting effect was verified by mine pressure observation. The observation results showed that there was basically no deformation in the deep part of surrounding rock, and the surface convergence of surrounding rock was controlled within 120 mm and tended to be stable. After grouting, the deformation of roadway was effectively controlled to meet the stability requirements of roadway within the service period.
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