基于现场监测的破碎围岩介质垮落失稳及综合分析  

Comprehensive assessment of collapse instability of fractured rockmass mediums based on in-situ monitoring

作　　者：来兴平[1] 周光华[1] 张建华[1] 吕兆海[1] 柴鑫[1] 邹磊[1] 

机构地区：[1]西安科技大学能源学院,陕西西安710054

出　　处：《煤炭学报》2008年第3期246-250,共5页Journal of China Coal Society

基　　金：国家自然科学基金重点资助项目(10402033);陕西省岩层控制重点实验室重点资助项目(04JS19)

摘　　要：进行了现场工程地质、开采技术特征以及动力失稳等调查;研究了项板深部离层、断面收敛变形.采用现场锚杆(索)锚固强度以及声发射等围岩损伤与变形的多元信息监测手段.基于Hoek-Brown强度准则,辅以FLAC^(30)计算,分析其力学特征与失稳机理,根据现场综合监测和测试结果对比及分析,确定了巷道合理支护形式与定量参数,最终确保了巷道安全与稳定.The field engineering geological environment, characteristics of lithologic correlation, mining characters or parameters and dynamical instability of roadway were generally investigated. Furthermore, the field multiple-index monitoring methodologies including roof deep-delamination observation, monitoring of convergence deformation of across-section, field test for bolt-cable anchoring strength, acoustic emission （AE） characterization indicating rock-mass micro-fractures and damages were applied. The consequences of mechanical or strength characterization and collapsing mechanism were assessed based on the Hoek-Brown criterion and FLAC3D program and comparison of observed indicators or information after roof falls and the place of the mining activity ultimately, the effective supporting and reinforcing methods and rational parameters were determined quantitatively by so as to achieve rockmass stability and safe mining.

关 键 词：多元信息监测 破碎围岩介质 垮落失稳 开采扰动区 声发射 

分 类 号：TD327.2[矿业工程—矿井建设]