千米深井孤岛工作面临空巷道支护技术

Support in Roadway along Gob at Island Mining Face of Kilometer-deep Shaft

孤岛工作面临空巷道矿压显现剧烈,支护难度大,尤其是千米深井巷道更为显著。针对7121工作面的实际条件,基于孤岛工作面临空巷道围岩稳定性特征及锚网索支护机理,探索深井孤岛工作面临空巷道支护技术。结果表明:孤岛工作面临空巷道覆岩形成弧形三角块结构,对巷道围岩稳定起决定作用;孤岛工作面临空巷道采用巷内锚杆支护、巷顶及临空侧巷帮锚索加强支护,支护效果良好。研究成果为类似条件下的巷道支护提供借鉴和指导。

Aiming at the actual conditions of tremendous strata behavior and difficult support at 7121 mining face, the author probe into the support technology in roadway along gob at island mining face of kilometer--deep shaft on the basis of the stability features of surrounding rock and the mechanism of bolt--mesh--cable support, in which overlying rocks forms an arcuate triangle--block to guarantee the stability of the surroundi bolt support inside the roadway and reinforcement with cable above the roadway and on the road ng rock and side realizes good support effect, kilometer-- deep shaft ; island mining face ; roadway along gob ; bolt-- mesh-- cable support