摘要
地下工程围岩分类是支护设计和施工的基础,国内外学者已提出了多种分类方法并取得满意成果,但诸如巷道上覆严重风化层等复杂地层的围岩分类,其研究成果还极为有限。以极限平衡区深入围岩深度为指标的分类方法为基础,首先考虑矿山采动及煤岩体力学性质的影响,其次考虑煤层顶板风化程度,最后得到最终塑性破坏区半径并进行分类。方法核心在于分析塑性破坏区和顶板严重风化区是否贯通,并根据贯通情况对塑性区半径进行修正。针对葛泉矿11912工作面回采巷道情况复杂、部分顶板严重风化的情况,利用上述方法进行巷道围岩分类,根据分类结果提出相应的支护对策并取得了良好支护效果。
A new classification method,which considers the depth of limit equilibrium zone in the surrounding rock as its indicator,was put forward.This method takes the impact of mining and coal rock mechanical properties and the degree of weathering of seam roof into consideration to get the final plastic failure zone radius,which is revised in accordance with connecting situation between the plastic damage zone and the weathered zone of seam roof,as the core of this method.The application in 11912 working face of Gequan mine,which is complex and severely weathered in some roof,showed that this classification method has good supporting effect.
出处
《四川大学学报（工程科学版）》
EI
CSCD
北大核心
2014年第4期33-38,共6页
Journal of Sichuan University (Engineering Science Edition)
基金
国家"973"重点基础研究发展计划资助项目(2010CB226802)
四川省教育厅重点资助项目(12ZA143)
四川师范大学校级资助项目(14YB01)
关键词
顶板
风化
塑性区
支护
分类
seam roof
weathering
plastic zone
support
classification
