摘要
通过对嘉禾矿浦溪井2152底板巷围岩变形严重的支护问题进行分析,得出围岩所处泥质砂岩岩层属于软岩序列以及高偏应力引起围岩出现不规则塑性区是锚杆出现整体拔出失效的主要原因。根据蝶形塑性区破坏理论,提出“让抗结合、局部加强支护、全断面协调变形”的支护思路,对2152底板巷支护方案进行了优化,采用“锚杆、钢筋网、喷浆、预应力锚索”的联合支护方式。通过FLAC^(3D)有限元方法对优化支护方案进行了模拟研究并在井下进行了试验,现场试验表明:围岩顶底板移近量在125 mm左右,两帮移近量在140 mm左右,优化的支护方案有效地控制了围岩的变形量,围岩稳定性得到提高。
Through the analysis of the serious deformation of surrounding rock of the 2152 floor roadway of Puxi well in Jiahe mine,it is concluded the overall pull-out failureis caused by surrounding rock composed of argillaceous sandstone belonging to the soft rock and the irregular plastic zone of the surrounding rock.According to butterfly-failure theory of mining roadways,the support idea of"combining resistance with resistance,strengthening support locally,and coordinating deformation of the whole section"is proposed.The support scheme of 2152 roadway is optimized,and the comprehensive support mode of"anchor bolt,reinforcing mesh,shotcrete,and prestressed anchor cable"is adopted.The optimized support scheme was simulated by FLAC^(3D) finite element method and tested underground.The field test shows that the roof and floor displacement is about 125 mm,and the two ribs displacement is about 140 mm.The optimized support scheme effectively controls the deformation of surrounding rock,and the stability of surrounding rock is improved.
作者
董恩远
袁超
李盟
张振全
DONG Enyuan;YUAN Chao;LI Meng;ZHANG Zhenquan(School of Mining and Geomatics Engineering,Hebei University of Engineering,Handan 056038,China;Handan Key Laboratory for Ground Control and Disaster Prevention of Deep Roadways,Handan 056038,China;School of Resource&Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)
出处
《煤炭技术》
CAS
北大核心
2023年第9期54-58,共5页
Coal Technology
基金
河北省自然科学基金青年项目(E2021402050)
邯郸市科技研发计划项目(21422903258)。
关键词
巷道支护
锚固失效
联合支护
稳定性控制
roadway support
anchor failure
combined support
stability control
