摘要
针对深部高应力软岩巷道围岩破碎、变形大、支护困难等问题,本文以小康矿S2S2工作面运输巷为工程背景,首先通过现场观测归纳巷道变形破坏特征为变形大且速度快、顶板严重流变、底鼓量大、支护构件发生屈服破断。然后,根据软岩巷道支护原理,提出了S2S2工作面运输巷支护优化方案,即采用"高强锚(索)喷网配合U型钢可缩支架及壁后充填"的支护技术。并利用ANSYS模拟软件对原方案和优化方案的支护效果模拟验证,同时在S2S2工作面运输巷进行现场试验。结果表明:优化方案可有效限制巷道变形,巷道服务期间顶板最大下沉量588mm,两帮最大移近量为211mm,无冒顶、片帮事故发生,发挥了巷道围岩承载能力,支护效果好。
The research aims at the problems of large deformation,broken surrounding rock and difficult supporting in the deep roadway which has a high stress level.Firstly,through the field observation,the deformation and failure characteristics of the roadway are summed up as follows:large deformation and fast speed,serious rheology of the roof,large amount of bottom drum,and yielding and breaking of the supporting component.Then,according to the supporting principle of soft rock roadway,the optimization support scheme of S2S2 working face haulage roadway is put forward,that is the support technology of high strength anchorage shotcrete and U steel retractable support and backwall filling is used.Finally,ANSYS simulation software is used to simulate and verify the effect of the original support scheme and optimization scheme.The results show that the optimization scheme can effectively limit the deformation of laneway,the maximum subsidence of roof is 588 mm,and the maximum distance between two-side is 211 mm,no roof and side fall accident and occurred supporting results are good.
作者
王国强
王海东
WANG Guoqiang;WANG Haidong(Qinhe Energy Group Co.,Ltd.,Jincheng 048200,China;Safety Engineering College,North China Institute of Science and Technology,Sanhe 065201,China)
出处
《中国矿业》
北大核心
2018年第B10期126-129,158,共5页
China Mining Magazine
基金
国家自然科学基金项目资助(编号:50704024)
关键词
深部
软岩巷道
高应力
支护优化
deep roadway
soft rock roadway
high stress
support optimization
