Abstract
By analyzing the stability factors and deformation characteristics of wall rock of dynamical pressure roadway in coal mine, the basic support form of dynamical pressure roadway was summarized. Combined with the geological conditions and the roadway damaged condition of two tape head chamber in ChengZhuang colliery No.2 area, the reinforcement approach was put forward, which adopting the composite grouting of cement and unsaturated polyester chemical pulp, then strengthened by prestressed grouting anchor. Comparing the supporting effect of prestressed grouted anchor with not grouted, it was obviously found that the effect is great improved. The strong deformation of dynamic pressure roadway can be solved effectively in this way.In recent years, with the development of mining technology and high-gas coal mining, the roadway layout that can meet the requirements of production and ventilation is increasingly complicated. The area of roadway increases as equipment have been expanding. The pressure has been apparently increasing because the thickness of mining and the height of caving face increase. The difficulty level of roadway support is also added since the surrounding rock condition become more and more complex [1-3].
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