深部硐室围岩破坏原因与稳定性控制技术  

Failure Reasons of Surrounding Rock of Deep Chamber and Control Technology for Its Stability

作　　者：李来源[1,2] 林惠立[2,3] 魏夕合[2] 

机构地区：[1]淄博矿业集团有限责任公司葛亭煤矿,山东济宁272100 [2]山东科技大学资源与环境工程学院,山东青岛266510 [3]煤炭科学研究总院,北京100013

出　　处：《矿业安全与环保》2011年第6期25-27,30,共4页Mining Safety & Environmental Protection

基　　金：国家自然科学基金项目(50874070)

摘　　要：煤矿开采逐渐转向深部,深部硐室围岩大变形特征给硐室群稳定性控制带来很大难度。根据深部大断面硐室围岩力学特征及变形特性,通过地质条件分析、原岩应力测试、岩石微观组分分析,对深部硐室围岩破坏的影响因素进行了总结,以抗让结合的原则,提出深部构造复杂区域大断面硐室围岩稳定性控制对策。采用关键部位耦合支护控制技术+底脚锚杆+全断面锚索加强支护对深部大断面硐室进行强抗微让的强力支护方式,在葛亭煤矿230扩容泵房硐室成功应用,并对泵房硐室围岩收敛变形、锚杆索工况、离层进行了长期监测,围岩顶底板移近量仅12.5 mm,两帮内移量7.5 mm,锚杆索受力均匀,内外离层较小,完全满足矿井安全生产需要。With the gradual deepening of coal mining,the large deformation of surrounding rock of the deep chambers has brought a lot of difficulties in stability control of the deep chamber group.In this paper,summarization was carried out on the influence factors of the surrounding rock failure of deep chambers according to mechanical and deformation characteristics of the surrounding rock of the chamber with large cross-section and through the geological condition analysis,the original stress test and the analysis of the rock's micro-components,and on the principle of the combination of resisting with yielding,the control countermeasures for surrounding rock's stability of the chamber with large cross-section in a deep and complicated structure region was put forward.A powerful support pattern for deep large cross-section chamber by adopting the coupling support control technology at the key position plus foot anchor and full size anchor was successfully applied in 230 pump chamber in Geting Coal Mine,a long-term monitoring was conducted on the convergence deformation of the surrounding rock of this chamber,the anchor and cable condition and the bed separation,the monitoring showed that the roof-to-floor convergence of the surrounding rock was only 12.5 mm,the moving quantity of two sides was 7.5 mm,the anchor and cable were acted under a uniform force,and both the external and internal bed separation was small,so it can completely meet the needs for work safety in the mine

关 键 词：深部开采 大断面硐室 围岩稳定 耦合支护 矿压观测 

分 类 号：TD354[矿业工程—矿井建设]