联合支护技术在深部软岩巷道中的应用

摘要

Large deformation phenomena are induced by the high in-situ stresses for the red shale laneways in the phosphorite mine of Guizhou Kailin group, such as rock fracturing, rock expansion and squeezing deforma-tions. To avoid the failure of the laneway and multi-repairs, a combined rock support technology is proposed based on mechanical characteristics of the red shale and modern support theory. It is included that combining the long cable, shot-crete, rock-bolt and steel meshes. The results show that the proposed rock support method can significantly improve the support strength and stiffness by engineering practical comparison, which has reference value to the development and application of deep soft rock supporting technology.%贵州开磷集团深部矿山红页岩软岩巷道由于高地应力的作用，诱发衬砌开裂、蹦壳和围岩挤压大变形问题。为避免巷道破坏和多次返修，根据矿山红页岩的力学特性和现代支护理论，基于“先刚后柔再刚，先抗后让再抗”的支护理念，提出长锚索加喷锚网刚柔相济联合支护技术方案。通过工程实践比较，发现该方案可以提高软岩巷道的支护强度和刚度，对深部软岩巷道支护技术的发展和应用具有一定的参考价值。