School of Energy Science and Engineering,Henan Polytechnic University School of Resources and Safety
Engineering,China University of Mining and Technology(Beiing)

针对深井巷道围岩变形剧烈、变形持续时间长、支护难度大等问题,分析可知深井巷道围岩变形可控性较差,拟采用一次支护控制围岩变形,但现有工程技术条件下很难实现,且经济效益较差,据此提出基于高强多边形封闭式型钢支架的巷道围岩分次控制技术,对多边形封闭式型钢支架进行优化设计,一次支护采用锚杆+锚索联合支护让压,二次支护在巷道变形量接近锚索极限延伸量的80%时进行,采用高强多边形封闭式型钢支架强力支护,在邢东矿应用结果表明:采用新支护方式的巷道围岩变形量较小,顶板总变形量能够控制在52~72 mm,该支护技术能较好地保证围岩稳定性。

According to serious deformation,long sustained deformation,difficult support and other problems of the surrounding rock in deep mine roadway,the paper a nalyzed to know poor controllable deformation of the surrounding rock in the deep mine roadway. A primary support was applied to control the deformation of surrounding r ock by surpporting at once. Under the available engineering and technical condition,the primary support to control the deformation would be hardly realized and the econo mic benefit was poor. Thus based on high strength polygon closed type steel support,the multi control technology of roadway surrounding rock was provided and an optimiz ed design was conducted on the polygon closed type steel support. A bolt + anchor combined yield support was applied to primary support and the second support would b e conducted when the deformation value of the roadway would be 80% of the anchor extension value limit. The high strength polygon closed type steel support was applied to the powerful support. The application results in Xingdong Mine showed that with the application of the new support method,the deformation value of the surrounding rock in the mine roadway was less small,the total deformation value of the roof could be controlled within 52 ~ 72 mm and the support technology could well ensure the stability of the surrounding rock.

国家自然科学基金资助项目(51434006)；