采矿与安全工程学报 ›› 2014, Vol. 31 ›› Issue (3): 340-346.

• 论文 • 上一篇    下一篇

软岩巷道非对称变形破坏特征及稳定性控制

  

  1. 1. 中国矿业大学矿业工程学院,深部煤炭资源开采教育部重点实验室,江苏 徐州 221116; 2. 中国矿业大学煤炭资源与安全开采国家重点实验室,江苏 徐州 221116
  • 出版日期:2014-05-15 发布日期:2014-05-20
  • 作者简介:于洋(1985-),男,山东省新泰市人,博士生,从事巷道围岩控制理论与技术方面的研究。 E-mail:yuyangcumt@126.com Tel:13852004679
  • 基金资助:

    国家自然科学基金项目(51204166,51174195);江苏高校优势学科建设工程项目;江苏省普通高校研究生科研创新计划项目(CXZZ12_0954)

Study on asymmetric distortion and failure characteristics and stability control of soft rock roadway

  • Online:2014-05-15 Published:2014-05-20

摘要: 针对梅河煤矿软岩巷道开挖支护后出现非对称变形破坏、维护困难的问题,综合采用现场地质调研、微观物化实验、理论分析、数值计算的方法,分析了巷道非对称变形破坏的影响因素,发现了巷道变形破坏过程具有明显的阶段性,揭示了无支护条件下巷道围岩应力及塑性区分布规律和原对称支护条件下巷道非对称变形破坏特征。在此基础上,提出了“薄弱结构”的概念及“巷道整体稳定,薄弱结构加强支护”的非对称控制技术,并在现场进行了工业性试验。实践表明:非对称控制技术实现了支护结构与巷道围岩协调变形,显著控制了巷道围岩变形,有效避免了巷道围岩变形进入长时流变状态,保证了巷道的整体稳定。

关键词: 软岩, 非对称, 理论分析, 数值模拟, 薄弱结构, 让压支护系统

Abstract: In response to the issues of asymmetric distortion and failure of roadway and hard maintenance after excavation of support in Meihe coal mine,field geological investigation,rock mechanics experiment,microstructure materialization experiment,theoretical analysis and numerical simulation calculation are used synthetically in this paper to analyze the main factors responsible for asymmetric distortion and failure of the roadway. The research found out that the process of the roadway distortion and failure has significant stages and revealed the distribution of stress and plastic zone in the condition of non-support,the asymmetric distortion and failure characteristics of roadway under the condition of original symmetric support. On this basis, the paper proposed the concept of ‘weak structure’ and asymmetric control technology of ‘roadway overall stability,weak structure reinforced support’,and industrial test is implemented in the field. The practice proves that the compatible deformation of support structure and surrounding rock is realized,the deformation of surrounding rock of roadway is controlled remarkably and avoided getting into the status of long-term rheological; the overall stability of roadway is guaranteed by the asymmetric control technology.

Key words: soft rock, asymmetric, theoretical analysis, numerical simulation, weak structure, yield support system