摘要
基于河东矿23采区皮带下山围岩软弱破碎、锚网索支护困难的问题,分析巷道失稳破坏的原因,并建立巷道复合支护技术体系。结果表明:围岩性质差、埋深大及支护体与围岩不耦合是巷道破坏的主要因素;U型钢-锚网索联合支护能够实现二者的优势互补,使支护体与围岩构成统一的承载体,确保巷道的稳定;巷道主体采用U36型钢支护,配合高强预应力锚杆(索)加强支护,现场效果较好。
Aiming at the weak-broken surrounding rock and the disadvantages of bolt -mesh-cable support in 23 mining area of Hedong Colliery ,the paper suggests the combined support system with U -shaped steel and bolt -mesh-cable ,which would make the support and surrounding rock a unified supporting body ,and ensure the roadway stability .
出处
《江西煤炭科技》
2015年第3期56-58,共3页
Jiangxi Coal Science & Technology
关键词
深井
软弱破碎围岩
皮带下山
U型钢-锚网索联合支护
deep shaft
weak-broken surrounding rock
combined support with U -shaped steel and bolt -mesh-cable
