【摘要】 基于岩体结构控制论、土体宏观控制论和地质工程演化论等力学原理，对岩体抗剪切抗滑移、塌方失稳模式及围岩稳定性等进行分析，提出了对掌子面岩体进行分区和高度关注岩体破碎带、软弱层和岩体结构面的影响，引入3个调整系数α、β、ξ对BQ分级公式进行修正，给出了浅埋隧道围岩分级的流程图并进行了实例分析。结果表明：围岩分级与围岩自稳能力、掘进进尺、加固支护方式等有对应的关系；分级还要与跟踪地质调查、超前地质预报和监控量测的结果相比对，各方面综合分析相互印证，提高分级的准确性，才能更准确掌握岩体的工程特性。更多还原

【Abstract】 Resistance of shearing and slipping of rock, collapse instability mode and surrounding rock stability are analyzed based on combined principles of rock structure cybernetics,soil macro cybernetics and geological evolution theory. It is proposed to partition the rock mass of the tunnel face, pay close attention to the effects of rock fracture zone, weak layer and rock mass structural plane. The BQ classification formula is modified by introducing three adjustment coefficients α, β, and ξ. A process diagram of surrounding rock classification for shallow tunnel is presented, and an example is analyzed; It is demonstrated that the classification of surrounding rock is influenced by its stability, tunneling footage, reinforcement and support methods. The classification should also be compared with the results of comprehensive geological survey,geological prediction and monitoring measurement. All aspects should be comprehensively analyzed and mutually verified to improve the accuracy of classification and more accurately grasp the engineering characteristics of rock mass.更多还原