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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 physical and mechanical properties of the main mining coalbed sandstone-water interaction and the deformation and failure characteristics of roadway roof are studied by means of theoretical analysis, laboratory tests and field measurement. The connotation of the water-rich roadway is proposed and carried out The results show that the water-bearing sandstone is divided into coarse-grained argillaceous feldspar sandstone and medium-grained arboreal fossil litharge sandstone, and under the action of water, the destruction form of the water-bearing sandstone has changed, From the dry state, the tensile fracture along the axial direction of the rock specimen changes to the fragmentation of the end face. The roadway of the water-bearing sandstone shows the staged deformation and failure characterized mainly by the expansion and deformation of the soft rock and the water-bearing sandstones. The water- Reduce, rich waterway is divided into Ⅰ, Ⅱ class of water-rich roadway.