摘要
边角煤C工作面通过预先留设回撤巷道的方式进行回撤,通过论证认为回撤巷道原设计支护锚杆、锚索间排距过小,增加了支护成本,拟适当扩大支护锚杆、锚索间排距。通过数值模拟分析,对原支护参数进行了优化,实际应用后,通过现场监测,巷道最大两帮移近量、顶板下沉量分别为18 mm、22 mm,不仅能够满足巷道稳定性要求,还使成巷道本降低了37.2%。
In view of the small row spacing between the originally designed support bolts and anchor cables,and the high cost of support,the author proposes to appropriately expand the row spacing between support bolts and anchor cables,and optimizes the original support parameters based on numerical simulation analysis,whose application proves that the maximum convergence of the two sides of the roadway and the roof subsidence are respectively 18 mm and 22 mm,which can not only meet the stability requirements of the roadway,but also reduce the cost of the roadway by 37.2%.
作者
孙端
Sun Duan(Fenhe Coking Coal Co.,Huozhou Coal Power Group,Hongdong,Shanxi 041602)
出处
《江西煤炭科技》
2023年第1期43-45,49,共4页
Jiangxi Coal Science & Technology
关键词
回撤巷道
支护参数
支护成本
顶板下沉量
equipment remove roadway
support parameter
support cost
roof subsidence
