回采面顶板覆岩卸压抽放瓦斯机理及合理参数研究  

Research on Mechanism and Reasonable Parameters of Gas Drainage by Pressure Relief of Overlying Roof Rockin a Working Face

作　　者：周德永[1] 

机构地区：[1]安徽理工大学,安徽淮南232001

出　　处：《矿业安全与环保》2003年第4期3-6,共4页Mining Safety & Environmental Protection

摘　　要：通过理论分析和现场试验分析了煤炭开采顶板覆岩冒落变形动态变化规律,分析了覆岩关键层的层位及岩体特性对煤层回采后顶板岩层的冒落区、裂隙区的扩展影响特征;结合现场工程实际,提出了顶板覆岩卸压抽放技术,分析了影响瓦斯抽放量的因素,给出了顶板卸压钻孔的合理布置参数,为高瓦斯煤田瓦斯抽放提供了一条新途径。On the basis of theoretical analysis and on-the-spot tests,the paper analyzed the dynamic variation law of overlying roof rock caving and deformation in the working face during coal extraction,and the influ ence of the key rock layer position and its characteristics of the overlying roof rock on the exten sion of roof caving and fractured zone of roof rock strata after coal extrac tion.In addition,the paper put forward the gas drainage technique by pressure relief of the overlying roof rock according to the site engineering practice,analyzed the factors affecting gas drainage volume and obtained the reasonable arrangement parameters of draining holes in roof rock,thus providing a new way for gas drainage in a gassy coal field.

关 键 词：回采面 顶板覆岩 卸压抽放 瓦斯 岩层移动规律 冒落 工程试验 裂隙 布置区域 

分 类 号：TD712.6[矿业工程—矿井通风与安全]