煤矿安全2018，Vol.49Issue(1)：222-225,229,5.DOI:10.13347/j.cnki.mkaq.2018.01.059
大采高厚顶煤回采巷道围岩破坏分析及支护
Surrounding Rock Failure Analysis and Its Support in Large Mining Height and Thick Top Coal Roadway
赵涛1
作者信息
- 1. 煤科集团沈阳研究院有限公司,辽宁抚顺113122;煤矿安全技术国家重点实验室,辽宁抚顺113122
- 折叠
摘要
Abstract
To solve the surrounding rock control of large carving and thick top coal roadway,2101 haulage roadway was treated as engineering background and mechanical properties and deformation failure mechanism of surrounding rock were studied with laboratory experiments,numerical analysis and field monitoring,and at last,roadway support plan was determined.Study shows that peak strength and deformation of coal and rock samples are increasing significantly due to the confining pressure,obvious plastic deformation and plastic strengthening and expansion phenomenon occur to transform coal from ductility to brittle.The roof,two sides and the two shoulders of roadway are main deformation and failure areas,high concentrated shear stress and horizontal compressive stress are the main causes of surrounding rock failure.The stress areas of roadway roof and the two sides are connected with each other to form the surrounding rock bearing structure,and the broken coal and rock is the main object of roadway surrounding rock control.Feasible plans are proposed and the support effect simulation analysis of every plan is done,the optimal plan is determined and carried on by field test.According to monitoring,the deformation of roadway is small,surrounding rock is complete and stable,and the supporting effect is good.关键词
厚顶煤/回采巷道/变形破坏/围岩控制/锚杆支护Key words
thick top coal/mining roadway/deformation and destruction/surrounding rock control/bolt support分类
矿业与冶金引用本文复制引用
赵涛..大采高厚顶煤回采巷道围岩破坏分析及支护[J].煤矿安全,2018,49(1):222-225,229,5.
