含水砂岩顶板巷道失稳破坏特征及分类研究  

Research on the characteristics and classification of water-enriched sandstone roofs

作　　者：姚强岭[1] 李学华[1] 陈庆峰[1] 

机构地区：[1]中国矿业大学矿业工程学院深部煤炭资源开采教育部重点实验室,江苏徐州221116

出　　处：《中国矿业大学学报》2013年第1期50-56,共7页Journal of China University of Mining & Technology

基　　金：江苏高校优势学科建设工程资助项目(SZBF2011-6-B35);国家自然科学基金项目(50974118);教育部新世纪优秀人才支持计划(NCET-09-0727)

摘　　要：运用理论分析、实验室试验和现场实测方法,研究了宁东煤田主采煤层含水砂岩-水相互作用下物理力学性质及巷道顶板变形破坏特征,提出了富水巷道的内涵并对其进行了分类,阐述了分顶控制的基本思路.结果表明:含水砂岩分为粗粒泥质长石砂岩和中粒泥质长石岩屑砂岩,且在水作用下,含水砂岩破坏形式发生了变化,从干燥状态下沿岩样轴向的拉张破裂向端面碎裂破坏过渡;含水砂岩顶板巷道呈现以软弱岩层扩容变形和含水砂岩离层为主的分阶段变形破坏特征,含水砂岩浸水后强度迅速降低,富水巷道分为第Ⅰ,Ⅱ类富水巷道.The deformation of a coal drift roadway sandstone roof affected by water is studied theoretically, by laboratory testing, and by field measurements. Mechanical properties of this system are described. A concept of a ＂water enriched roadway＂ is presented and roadways are classified in this regard. The results show that water bearing sandstone weakens through interaction with water and the roof deforms following the pattern of soft rock dilation. The water bearing sandstone separates and the roadway may be classified as suffering Type I or II failure. Field conditions in the Ningdong coal field are studied relative to the new theory.

关 键 词：宁东煤田 含水砂岩 富水巷道 分类 

分 类 号：TD353.6[矿业工程—矿井建设]