巷道顶板岩层沉积稳定性分析  

Analysis of Sediment Stability of Roof Strata in Roadway

作　　者：刘洪涛[1] 樊龙[1] 宋高峰[1] 赵海啸[1] 汤达[1] 韩斌[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《煤矿开采》2012年第2期54-56,共3页Coal Mining Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB201204);中央高校基本科研业务专项基金(2009QZ01)

摘　　要：为了确定巷道顶板不同区域的稳定性,采用岩芯采取和描述、岩石切片显微观测为主要研究方法,以煤岩沉积学为理论基础,以岩层砂泥比值为主要指标,将矿井顶板稳定性分为Ⅰ～Ⅴ级。结果表明:将砂泥比进行标准化处理后,可以做为顶板岩层稳定性分类的重要依据,并据此得出矿井的顶板稳定性分类图;试验矿井顶板砂岩层强度低、湿式钻眼时岩层强度弱化、锚杆锚索锚固质量达不到设计要求的主要原因是由于原始沉积环境的不同而使砂泥比值过小、泥岩含量大、顶板稳定性大部分区域为Ⅲ～Ⅴ级所致。在进行Ⅳ,Ⅴ级顶板支护参数设计时,要重点监控岩层强度下降造成的支护结构失稳。In order to ensure roof stability at different areas,applying drilling core,microstructure observation by rock slice and taking ratio of sand to mud as main index on the basis of coal and rock sedimentology,roof stability was classified into 5 degrees from Ⅰ~Ⅴ.Results showed that ratio of sand to mud might be as important basis of roof stability classification after it was standardized.Thus mine roof stability classification map was obtained.In test mine,roof sandstone strength was low,rock strength reduced in wet drilling and anchored quality could not meet design requirement.Main reason included that the ratio of sand to mud was low,mudstone content was large,roof stability of most areas was between Ⅲ~Ⅴ.In designing Ⅳ and Ⅴ degree roof supporting parameters,supporting structure instability because of rock strength decrease should be monitored especially.

关 键 词：沉积 强度差异性 稳定性分类 

分 类 号：TD353.6[矿业工程—矿井建设]