摘要
为了缓解采掘衔接的紧张局面、提高煤炭资源回收率,以晋能控股装备制造集团成庄矿53091巷柔模混凝土沿空留巷工业性试验为背景,在原有锚网索支护体系的基础上,通过锚索对留巷顶板及巷帮进行补强施工,同时,超前5309工作面进行顶板深孔预裂爆破卸压作业,切断覆岩应力传递路径;在53091巷采空区侧布置规格3 000 mm×1 000 mm×3 500 mm混凝土充填模袋,并配合对拉锚杆提高混凝土挡墙整体强度。现场矿压监测数据表明:滞后工作面120 m后留巷围岩收敛变形趋于稳定,留巷围岩变形量均处于可控范围内,混凝土挡墙未发生开裂、大变形等情况,实体煤帮侧顶底板最大移近量310 mm,充填体侧顶底板最大移近量256 mm,两帮最大移近量155 mm。
In order to alleviate the tense situation of mining connection and improve the coal resource recovery rate,taking the industrial test of flexible formwork concrete gob-side entry retaining in Lane 53091 of Chengzhuang Mine as the background,on the basis of the original anchor-mesh-cable support system,reinforcement construction is carried out on the roof and roadway sides of the retaining roadway through anchor cables.At the same time,the roof deep hole pre-cracking blasting pressure relief operation is carried out in advance of the 5309 working face to cut off the stress transmission path of the overlying rock;Arrange a concrete filling bag with a size of 3000 mm×1000 mm×3500 mm on the side of the goaf in Lane 53091,and cooperate with tension anchor rods to improve the overall strength of the concrete retaining wall.The on-site mine pressure monitoring data shows that after a delay of 120 m in the working face,the convergence deformation of the surrounding rock of the retained roadway tends to be stable,and the deformation of the surrounding rock of the retained roadway is within a controllable range.The concrete retaining wall has not cracked or deformed significantly,and the maximum movement of the roof and floor of the entity coal side is 310 mm,the maximum movement of the filling body side roof and floor is 256 mm,and the maximum movement of the two sides is 155 mm.
作者
祝贺
ZHU He(Chengzhuang Mine of Jinneng Holding Equipment Manufacturing Group,Jincheng 048000,China)
出处
《晋控科学技术》
2025年第3期34-37,共4页
Jinneng Holding Science and Technology
关键词
柔模
沿空留巷
支护
flexible mold
gob-side entry retaining
support
