关键词: 千米深井, 巷道支护, 岩体质量等级, RMR法, 分区分级支护

Abstract: In order to ensure the support effect of deep mine roadway，taking Ruihai mining submarine kilometer deep gold mine as the engineering background，combined with its engineering geological survey，the numerical simulation was used to study the stress and displacement variation law of roadway under different surrounding rocks，aiming to explore the failure mechanism of roadway and determine the reasonable roadway support method. Combined with the buried depth of roadway and the physical and chemical characteristics of surrounding rock，the "partition classification" support technology in this area is proposed. The support method of "bolt+shotcrete+metal mesh" is adopted in the -1 060 m middle section，and the support method of "bolt+shotcrete +metal mesh+anchor cable+steel arch" is adopted in the -1 300 and -1 480 m middle sections，which effectively controls the deformation and failure of the roadway.

Key words: kilometer deep well, roadway supporting, rock mass quality grade, RMR method, partition classification support