关键词: 耦合注浆, 地质异常体, 控制机制, 围岩, 深部岩巷

Abstract: Combined the analysis of special geological features and engineering features that appear in the construction process of level -780 m south wing conveyor roadway of Guqiao coal mine，Huainan mining area，that the grouting position and grouting range should adapt to the bearing performance of surrounding rock is considered to explain the connotations of coupling grouting.Mechanism of surrounding rock control via coupling grouting is elaborated based on FLAC^3D numerical simulation software;the results show that for the same thickness of grouting，the smaller grouting depth，the better control effect of surrounding rock;for the same starting grouting position，the greater the range of grouting，the better control effect of surrounding rock.Grouting in the surrounding rock between the position of stress peak and the roadway surface can inhibit the development of the plastic zone effectively，grouting in the rupture zone of surrounding rock can control the deformation of the surrounding rock obviously.In order to achieve effective control of the roadway with instable surrounding rock in large geological anomalous body，a coupling grouting method of “overall grouting-regional grouting-partial grouting” is proposed;Method for determining the optimal grouting range in step grouting of coupling grouting is given.The conclusion is that:the grouting range of overall grouting should be greater than 2 times of the stress peak depth，and the grouting range of regional grouting and partial grouting can be determined by solving elastic-plastic mechanics of surrounding rock.Under the guidance of the coupling grouting concept，surface pre-grouting technology，advance pre-grouting technology and short-grouting and short-tunneling technology were combined to manage roadway construction in Gugui geological anomalous body，with the desired effect of surrounding rock control achieved.

Key words: Coupling grouting, Geological anomalous body, Control mechanism, Surrounding rock, Deep well rock roadway