摘要
为了保证综采工作面大尺寸回采设备的安装,需要掘进大断面的切眼巷道,然而大断面切眼如何快速成巷、稳固支护,始终是难以解决的问题。为此提出了迈步掘进一次性成巷的施工工艺,即对于6100mm宽的巷道而言,第一次施工宽度4000mm巷道,施工一个班后,迈步至第二次施工剩余的2100mm宽度,往复交替循环,避免了二次扩帮与安装的交叉作业,节省了时间。采用锚杆(索)上钢带、钢筋网支护的主动支护参数,有效控制了围岩变形,顶板下沉量最大为130mm,两帮移近量最大为164mm。现场掘进过程中,从未发生过安全事故,该技术的使用提高了掘进效率,保障了安全。
In order to install the large mining equipment in fully mechanized mining face,large section cut roadway is needed.However,it is always difficult to quickly form and stably support large section cut roadway.The construction technology of one-time roadway formation by step excavation is proposed,that is,the roadway with the first construction width of 4000mm is constructed.After one shift,the remaining 2100mm width from step to the second construction is cycled back and forth,to avoid the cross operation of secondary wall expansion and installation and save time.The active support parameters of steel belt and steel mesh support on anchor bolt(cable)are adopted to control the deformation of surrounding rock.The maximum subsidence of roof is 130mm and the maximum displacement of two sides is 164mm.In the process of on-site excavation,no safety accident occurred.The technology has improved the excavation efficiency and ensured the safety.
作者
魏斌
WEI Bin(CCTEG Coal Mining Research Institute,Beijing 100013,China;Coal Mining and Design Branch,Tiandi Science and Technology Co.,Ltd.,Beijing 100013,China)
出处
《煤炭工程》
北大核心
2022年第7期26-30,共5页
Coal Engineering
基金
国家自然基金资助项目(52174186,52174118)。
关键词
大断面切眼
迈步掘进
一次成巷
主动支护
围岩控制
large section open-off cut
step excavation
roadway formation at one time
active support
surrounding rock control
