摘要
沿空留巷实现了无煤柱开采,是煤矿生产中的重大技术改革。整体浇注巷旁充填技术是我国近年来研究和应用的先进巷旁支护技术。为了保持正常生产,就必须保证巷旁充填墙体稳定性。应用现场观测法,根据沿空留巷围岩应力随工作面推进的变化规律,研究了下区段煤体应力变化规律以及充填墙体稳定性。运用FLAC-3D数值模拟软件,模拟了4种不同宽度时的充填墙体稳定性,研究表明,墙体宽度大于或等于2m时,巷道围岩塑性区范围明显减小,支护效果较好。
Gob roadway achieved mining without pillar,which is a major technological reform.The wholly casting fill technology is an advanced supportting technology which is widely researched and applicated in china recently.In order to maintain normal production,we must ensure the stability of the filling wall.Applying the observation method,based on the changing law between the stress in wall rock and the distance of face,we have studyed the changing law of the stress in the next sublevel coal body and the stablility of the filling wall.Applying FLAC-3D numerical simulation software,simulating the stablility of the filling wall in four different width.Research shows： when the filling wall width is equal to or greater than 2 m,the plastic zone will be decreased obviously,the supporting effect is good.
关键词
沿空留巷
充填墙体
数值模拟
塑性区
Gob Roadway
Filling Wall
Numerical Simulation
Plastic Zone
