摘要
为进一步完善实际工程应用中工作面沿空留巷围岩控制技术,减少留巷成本,以11101工作面为背景,通过工程现场实践,分析了矸石开采沿空留巷围岩结构,留巷围岩受力过程以及围岩变形和上覆岩层运动特征,并基于留巷围岩应力分析结果以及矸石填充工作面沿空留巷围岩控制原理,提出了“锚索+加强锚杆”等支护方案,并设计了监测系统,对留巷围岩变形及留巷隔离墙体承载性能进行了监测。现场监测结果表明:11101工作面运输平巷变形量较小,处于可控范围内,留巷获得成功,可为相似条件下的留巷围岩控制技术提供了参考。
The method of gob-side entry retaining of waste filling working face plays an important role in the technology of non-pillar mining in coal mines,which is widely used in mining thin and medium thickness coal seams,nevertheless,the roof weighting is still drastic,and the entry retaining effect is poor.In order to further perfect the wall rock control technology of gob-side entry retaining of working face in actual engineering application,and to reduce the entry retaining cost,the 11101 working face is used as the background,through engineering site practice,the wall rock structure of gob-side entry retaining in waste rock mining,the stress process of entry retaining wall rock,the wall rock deformation and the movement features of overburden are analyzed;and based on the results of stress analysis of entry retaining wall rock and the wall rock control principles of gob-side entry retaining of waste filling working face,the Anchor Cable+Reinforcing Rock Bolt and other solutions are rolled out.The monitoring system is designed to monitor the deformation of entry retaining wall rock and the bearing performance of the separating wall of entry retaining.The site monitoring results show that the deformation of the haulage drift is small,within the controllable range,which means that the entry retaining is successful and can provide a reference for using the entry retaining wall rock control technology under similar conditions.
出处
《中国矿山工程》
2022年第2期54-59,共6页
China Mine Engineering
关键词
充填采矿
沿空留巷
围岩稳定规律
围岩控制
cut-and-fill mining
gob-side entry retaining
law of wall rock stability
wall rock control
