Rocks surrounding deep, high-stress roadways typically undergo a vicious cycle of destruction → repair → re-destruction → re-repair over a long time. This article uses the roadway restoration project of Pingmei Mine No. 6 (400 m underground) as research object. Starting from the plastic area, the characteristics of the distribution of rock surrounding the circular roadway are analyzed, and the influence of the side pressure coefficient, cohesive force, inside friction angle, support strength, and roadway radius on the plastic area is studied. Four types of distribution patterns were observed in rocks surrounding the plastic area of the roadway: round, oval, rounded rectangle, and butterfly. The side pressure coefficient, cohesive force, and inside friction angle affected the distribution and range of rocks surrounding the plastic area of the roadway. The support radius of the roadway and the support strength of its face did not change the distribution of the plastic area, but only affected its size. Therefore, to maintain the long-term stability of weak and broken roadways, the strength of the surrounding rocks must be increased, and roadway renovation should be avoided as it affects the distribution of the plastic area and reduces its scope. Engineering practice has shown that the “anchor net spray + hollow grouting anchor cable” technology for the combined, step-by-step repair and support of roadways, with a hollow grouting anchor cable as core, can suppress the distribution and scope of the plastic area to guarantee safe and long-term use of the roadway.

长时间处于深层，高应力巷道周围的岩石通常经历破坏→修复→破坏→修复的恶性循环。本文以平煤6号（地下400 m）巷道修复工程为研究对象。从塑性区开始，分析了圆形巷道周围岩石的分布特征，研究了侧压力系数，内聚力，内摩擦角，支护强度和巷道半径对塑性区的影响。在巷道可塑性区域周围的岩石中观察到四种类型的分布模式：圆形，椭圆形，圆形矩形和蝴蝶形。侧压力系数，内聚力，内部摩擦角影响巷道塑性区周围岩石的分布和范围。巷道的支护半径和其工作面的支护强度不会改变塑料区域的分布，而只会影响其尺寸。因此，为了保持弱小和破碎的巷道的长期稳定性，必须提高围岩的强度，并应避免巷道翻新，因为它影响塑性区域的分布并缩小其范围。工程实践表明，以空心注浆锚索为核心的巷道组合，逐步修复和支护的“锚喷网+空心注浆锚索”技术可以抑制塑料的分布和范围。区域以确保安全和长期使用道路。巷道的支护半径和其工作面的支护强度不会改变塑料区域的分布，而只会影响其尺寸。因此，为了保持弱小和破碎的巷道的长期稳定性，必须提高围岩的强度，并应避免巷道翻新，因为它影响塑性区域的分布并缩小其范围。工程实践表明，以空心注浆锚索为核心的巷道组合，逐步修复和支护的“锚喷网+空心注浆锚索”技术可以抑制塑料的分布和范围。区域以确保安全和长期使用道路。巷道的支护半径和其工作面的支护强度不会改变塑料区域的分布，而只会影响其尺寸。因此，为了保持弱小和破碎的巷道的长期稳定性，必须提高围岩的强度，并应避免巷道翻新，因为它影响塑性区域的分布并缩小其范围。工程实践表明，以空心注浆锚索为核心的巷道组合，逐步修复和支护的“锚喷网+空心注浆锚索”技术可以抑制塑料的分布和范围。区域以确保安全和长期使用道路。因此，为了保持弱小和破碎的巷道的长期稳定性，必须提高围岩的强度，并应避免巷道翻新，因为它影响塑性区域的分布并缩小其范围。工程实践表明，以空心注浆锚索为核心的巷道组合，逐步修复和支护的“锚喷网+空心注浆锚索”技术可以抑制塑料的分布和范围。区域以确保安全和长期使用道路。因此，为了保持弱小和破碎的巷道的长期稳定性，必须提高围岩的强度，并应避免巷道翻新，因为它影响塑性区域的分布并缩小其范围。工程实践表明，以空心注浆锚索为核心的巷道组合，逐步修复和支护的“锚喷网+空心注浆锚索”技术可以抑制塑料的分布和范围。区域以确保安全和长期使用道路。