摘要
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。
Based on the research and projects practice of mining steeply dipping seam, used results of the theoretical a- nalysis,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-shell structure section along the tendency and strike can be described by the nonlinear quadratic function which contain the parameter coal seam dip angle, mining height, face length and roof rock properties, ect.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2010年第2期182-184,共3页
Journal of China Coal Society
基金
教育部新世纪优秀人才支持计划(CET-04-0972)
关键词
大倾角煤层
围岩
非对称力学特征
倾向堆砌结构
“似壳”结构
steeply dipping seam
surrounding rock
asymmetry mechanics characteristics
tendency extrusion struc- ture
homo-shell structure
