高瓦斯综放工作面瓦排巷墩柱支护技术研究

摘要

高瓦斯矿井综放工作面采用双“U ”型通风方式解除瓦斯的制约，但外圈巷道受动压影响变形大（底鼓量高达2．0 m），严重影响通风和行人的安全，一般采用木垛进行加强支护，效果不好。为此，提出了用高水速凝材料墩柱代替木垛进行加强支护。 FLAC3D数值模拟及现场矿压观测结果显示，墩柱支护优于木垛支护，并能有效地控制巷道围岩变形，平均每米巷道节约4243元，效益明显，为类似地质条件下巷道支护提供一种行之有效的方案。%The fully mechanized coal face of high-methane coal mine adopting double “U” type ventilation way remove the threat of methane.But the outer roadway affected by the dynamic pressure bringing about severe deformation ( the heaving floor reach up to 2.0 m), seriously affect the ventilation and pedestrians'safety.The general use of the crib timbering to reinforce supporting is unsatis-fied.Therefore, the reinforcement method of high-water and quick-setting pier instead of crib timbering is put forward.FLAC3D nu-merical simulation and field-observation results of rock pressure showed that the supporting can effectively control the deformation of surrounding rock of roadways and better than crib timbering, and save 4 243 yuan per meter roadway , benefit is obvious .This pro-vides an effective support scheme for roadway support in the similar geological conditions.