大倾角煤层开采围岩空间非对称结构特征分析

基于目前大倾角煤层开采研究成果和工程实践，结合理论分析、相似材料模拟实验、多元数值仿真技术结果，建立了大倾角煤层采场力学模型。分析认为，采场围岩具有非对称应力特征，岩层破坏易形成倾向堆砌和反倾向堆砌结构，且岩层沿倾向不同区域存在不同的破坏结构形式；同时，大倾角煤层采场存在三维“似壳”力学结构，其倾向和走向剖面包络形状可以用包含煤层倾角、开采高度、工作面倾斜长度、顶板岩性等参数非线性二次函数来表示。

Analysis of asymmetric structure around coal face of steeply dipping seam mining

Based on the research and projects practice of mining steeply dipping seam,used results of the theoretical analysis,physical simulation experiments and multi-numerical-simulation-technology,asymmetry mechanics along the tendency of working face were summarized. In the roof strata,the tendency extrusion structure and countertendency structure are formed,and different kinds of structure exist in different area along the tendency,the homo-shell structure is formed around the coalface,the envelope shape of homo...