摘要
针对软硬互层条件下临时支护与快速掘进的匹配问题,采用FLAC^(3D)有限差分程序进行数值模拟分析。研究表明,掘硬支软条件下,施加合适的支护强度能较好发挥锚杆与混凝土的承载能力;掘软支硬条件下,施加支护对围岩影响较小,巷道稳定性主要取决于掘进段围岩的性质。在不同软硬互层条件下,工作面空顶距变化对顶板下沉量的影响不同;顶板为较软岩石时,空顶距变化会对顶板下沉有一定的影响;顶板为较硬岩石时,增加空顶距对顶板下沉影响较小。在榆树岭煤矿进行了试验,在保证巷道稳定情况下减少支护强度,掘进效率显著提高。研究成果可在类似斜井施工中推广应用。
In the context of soft-hard interlayer conditions,the study used FLAC^(3D)finite difference software for numerical simulation analysis of the matching issues between temporary support and rapid excavation.The research shows that when“excavating hard and supporting with soft rocks”,applying suitable support intensity enhances the load-bearing capacity of anchors and concrete effectively.When“excavating soft and supporting with hard sock”,the influence of support on surrounding rock is minimal,with roadway stability primarily determined by the rock mass properties in the excavation section.Under the conditions of different soft and hard interbeds,the influence of the change of empty roof distance on the roof subsidence is different.When the roof is soft rock,the change of empty roof distance will have a certain influence on the roof subsidence.When the roof is hard rock,increasing the empty roof distance has little effect on the roof subsidence.The test was carried out in Yushuling Coal Mine to reduce the support strength under the conditions of ensuring the stability of roadway,and the tunneling efficiency was significantly improved.
作者
秦继龙
聂国豪
朱鹏
李亚楠
佟汉宇
王昆明
QIN Jilong;NIE Guohao;ZHU Peng;LI Yanan;TONG Hanyu;WANG Kunming(Kuqa Yushuling Coal Mine Co.,Ltd.,Kuqa 842000,China;School of Mechanics and Civil Engineering,China University of Mining&Technology,Xuzhou 221116,China)
出处
《陕西煤炭》
2025年第7期51-57,共7页
Shaanxi Coal
关键词
斜井
软硬互层
空顶距
临时支护强度
inclined shaft
soft and hard interlayer
empty roof distance
temporary support strength
