综放工作面回风巷超前段破坏及控制技术

Research and Application on Development Area of Return Airway Damage and Controlling Technology in Fully Mechanized Caving Face

基于某矿705综放工作面回采过程中回风巷超前段矿压显现频发难题,分析了超前段巷道破坏机理,提出采取锚网索支护+高压水射流巷帮卸压的协同控制技术。数值模拟结果表明,该协同控制技术能够有效降低工作面上端头煤体中的应力集中现象,且现场应用效果良好。研究成果为回采工作面回风巷超前区域围岩稳定性改善提供了一定的控制理论和现场指导意义。

Based on the frequent occur rence of rockpressure in the development section of the No. 705 fully mechanized top coal caving mining face in a mine, the failure mechanism of the development section roadway is ana-lyzed ,and the coordination controlling technology for the anchor and the high-pressure water inject ion are put for-ward. The numerical simulation results show that the co-control technique can effectively reduce the stress concentra-tion in the top head of the working face with better effect. The research results provide some control theory, and is of certain significance for the improvement of the stability of the surrounding area of the return airway in the working face.