摘要
研究表明,拱顶易受拉最先破坏,巷道跨度增大时,拱顶传递到两直墙的载荷超过直墙极限承载能力,直墙将先于拱顶受压破坏;影响碹体稳定的因素有巷道的跨度、直墙厚度、料石强度和顶板对碹体载荷分布状态;柳林矿区5#煤层巷道采用砌碹支护时,跨度不宜超过直墙厚度的11.78(遇水时5.86)倍,在顶板应力不平衡时,不宜采用砌碹支护。
The study showed that, the vault is susceptible to pull the ifrst failure, the span of roadway increases, the load that the vault is transferred to two straight wall also increase, when it exceed the ultimate bearing capacity of the straight wall, the straight wall will be compressed failure in the vault;inlfuence factors of the lining stability include the roadway span, straight wall thickness, strength and the roof load distribution state;Liulin Mining Area 5# coal roadway with arching support, span is not more than 11.78 times of straight wall thickness （water 5.86） , when the roof stress is imbalance, it is inappropriate to use the arching support.
出处
《山东煤炭科技》
2014年第12期40-42,共3页
Shandong Coal Science and Technology
关键词
砂岩料石
稳定性
充填层
直墙厚度
复合支护
Sandstone ashlar
stability
iflling layer
vertical wall thickness
composite support
