煤层底板突水模式及机理研究  

Modes and mechanism for water inrushes from coal seam floor

作　　者：尹尚先[1] 

机构地区：[1]华北科技学院安全工程中心,北京101601

出　　处：《西安科技大学学报》2009年第6期661-665,共5页Journal of Xi’an University of Science and Technology

基　　金：国家自然科学基金项目(40672156);国家"十一五"科技支撑计划项目(2007BAK29B04;2007BAK24B01;2008BAB33B02);国家重点基础研究发展计划(973)项目(2006CB202200);河北省自然科学基金项目(D2007000765)

摘　　要：为了阐明不同地质条件下煤层底板突水机理,划分了3种突水模式:正常岩层底板突水模式、断层裂隙带突水模式、陷落柱突水模式。针对不同模式分析了突水机理。正常岩层分为厚板微观压裂导升、薄板宏观整体破断导水2种突水模式;断层裂隙带包含4种突水模式。断裂直通式、断裂影响承压水导升带式、断裂影响底板破坏带式、断裂影响底板破坏带与裂隙导升带式;陷落柱突水模式分薄板理论子模式、剪切破坏理论子模式、厚壁筒突水子模式和压裂突水子模式等4种子模式。尽管模式不同,但都能统一归结为厚板微观压裂导升、薄板宏观整体破断导水2种最基本的突水机理。For illustrating mechanism of water inrush from coal seam floor at different geological conditions, three modes are classified as normal strata water inrush mode, fault water inrush mode, and paleo-sinkhole water inrush mode. Water inrush mechanism at different geological conditions were analyzed. The normal strata water inrush modes are classified as the sub-mode of microcosmic progressive intrusion in thick plate by hydraulic fractured, and sub-mode of whole break in thin plate ; The fault water inrush mode include sub-mode of falut direct connected, sub-mode of progressive intrusion zone of confined water influenced by fault, sub-mode of floor failure zone influenced by fault, sub-mode of progressive intrusion zone of confined water and floor failure zone influenced by fault; The paleo-sinkhole water inrush mode are divided into four sub-modes, including the sub-mode of water inrush for the thin plate theory, shear failure, thick wall cylinder and hydro-fracture. Although water inrush modes are different, two kinds of basic water inrush mechanism can be concluded as microcosmic progressive intrusion in thick plate by hydraulic fractured and whole break or failure in thin plate.

关 键 词：突水模式 突水机理 煤层底板 薄板整体破断 微观压裂导升 

分 类 号：P642.25[天文地球—工程地质学] TU45[天文地球—地质矿产勘探]