孤岛工作面回风巷围岩控制与支护技术  

Surrounding Rock Control and Support Technology of Air Returning Gateway in Coal Mining Face in Seam Island

作　　者：何富连[1] 薄云山[1] 吴焕凯 李通达[1] 王宁博[1] 许华威 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《煤炭工程》2014年第8期38-40,44,共4页Coal Engineering

基　　金：国家自然科学基金资助项目(51234005);国家重点基础研究发展计划(2010CB226802);中央高校基本科研业务费专项资金资助(2010YZ02)

摘　　要：以鹤壁四矿2604孤岛工作面回风巷为研究对象,采用FLAC3D模拟了巷道围岩的垂直应力,得出了巷道垂直应力与围岩深度的关系曲线。围岩垂直应力峰值点位置相差较大,顶板和采空侧围岩深部垂直应力趋于一定值,煤柱边缘垂直应力较小。针对围岩破碎,顶煤厚度大,提出了高强高预紧力锚杆与斜拉锚索梁结构联合控制技术,使浅部围岩与深部围岩形成统一的承载结构,矿压观测结果:顶底板相对移近量为215mm,两帮相对移近量为157mm,顶板离层量为35mm,为类似条件下的巷道支护提供借鉴。Based on a air returning gateway of No. 2604 coal mining face in a seam island of Hebi No. 4 Mine as a study object, a FLAC^3D software was applied to simulate vertical stress of the surrounding rock in mining gateway and a relationship curve between the vertical stress and surrounding rock depth of the gateway was obtained. Locations of the surrounding rock vertical stress peaks would have a big difference, the vertical stress of the seam roof and side surrounding rock depth in goaf was in a certain value and the vertical stress of the coal pillar edge was small. According to the broken surrounding rock and high top coal thickness, a control technology combined with high power and high pre - tension bolt and inclined anchor beam structure was provided and thus the shallow depth surrounding rock and the deep surrounding rock were formed a complete loading structure. The mine pressure observation results showed that a related convergence between the floor and roof was 215ram, related convergence between the two sidewalls was 157ram and roof separation value was 35mm. The technology could provide the references to the mine gateway support under a similar condition.

关 键 词：孤岛工作面 围岩控制 垂直应力 支护技术 

分 类 号：TD353[矿业工程—矿井建设]