采矿与安全工程学报2012，Vol.29Issue(3)：307-311,5.
采动覆岩隔水层稳定性力学模型及应用研究
Mechanical Model of Stability of Water-Resistant Strata Under Mining and Its Application
摘要
Abstract
In this paper, to research the stability of overlying water-resistant strata and prevent the roof water inrush accidents as well as implement water-preserved-mining, we regarded the water-resistant strata composed by only one rock stratum as clamped rectangular thick plate on foundation, and took the support effect of broken rock mass under the water-resistant strata into account, then deduced the deflection and stress expression according to energy method, and obtained the stress distribution characteristics of overlying water-resistant strata, as well as the variation rule of critical load along with working face advancement. In addition, combined with specific engineering practice, the stability of overlying water-resistant strata was analyzed by numerical simulation. The results indicate that: 1) after coal seam mining, the stress of overlying strata reaches the maximum value in the middle of longer boundary of the plate, where the rock is easy to be damaged; 2) the supporting effect of broken rock mass have important influence on the stability of overlying water-resistant strata, that is, the thinner the mining thickness is, the stronger the supporting effect of broken rock mass to the overlying water-resistant strata is, and the more difficult the water-resistant strata to be broken. The research results can provide some reference for the prevention of roof water inrush and water-preserved-mining practice.关键词
隔水层/力学模型/薄板理论/能量法Key words
water-resistant strata/ mechanical model/ plate theory/ energy method分类
矿业与冶金引用本文复制引用
姚邦华,白海波,黄汉富,浦海..采动覆岩隔水层稳定性力学模型及应用研究[J].采矿与安全工程学报,2012,29(3):307-311,5.基金项目
国家重点基础研究发展计划(973)项目(2010CB226800) （973）
国家自然科学基金项目(50974115,50904065) （50974115,50904065）
高等学校学科创新引智计划项目(B07028) （B07028）
