煤层滑覆顶板水文地质工程地质特征

豫西诸煤田主采煤层二₁煤层顶板非原生顶板,而是滑动构造的滑覆体。其由下而上可分为断层带、破碎带、裂隙带。它的水文地质条件简单,但工程地质条件复杂。岩石破碎,力学强度指标较低,回采中顶板不易管理。按其稳定性可分为较稳定的、不稳定的和极不稳定的三类,且以后两类为主,对这些顶板管理的基本措施是:短工作面,控顶距,快速推进,及时放顶,正常循环,不放大炮。 

THE HYDROGEOLOGIC AND ENGINEERING CHARACTERS OF THE COAL NAPPE ROOF

This paper to put foward the classing plan and the basic Manage measures for this type of the top. Many data make clear that sliding structure broken top of the coal in Ludian can be classed the three bands,which are fault band,broken band and fissure band,from below to upper. The hydrogeologic factors of the broken top are simple and the engineering factors are complex. The broken top is difficult to manage. The stable classing conclusion applied the by four-classing plan is that the broken top only exist the three types,which are the fairly stable, instable and very instable,and the later two types are main.