岩土力学2011，Vol.32Issue(2)：533-536,4.
采动覆岩裂隙分布及其空隙率特征
Study of distribution of overlying strata fissures and its porosity characteristics
摘要
Abstract
Based on elastic thin plate theory and key strata theory, the stratum subsidence was described quantitatively.The characterization of fissures distribution in overlying strata under the influence of mining is studied.Then, an approximate formula of porosity in the regular movement zone of overlying strata along strikes is achieved.The results show that the amount of the fissures on both sides of fissure field is more than that in central area, while the bigger separation appears below the key strata.The porosity is lessening along with the decreasing of depth.Generally, the curve of porosity of bottom area in mining overburden takes on a saddle shape; and the change is located around the key strata or hard rocks.The porosity curve of top area along the strikes is symmetric arched.The conclusions can be applied to the research of rock mass seepage and the comprehensive gas control.关键词
采空区/离层裂隙/分布规律/空隙率/瓦斯治理分类
矿业与冶金引用本文复制引用
宋颜金,程国强,郭惟嘉..采动覆岩裂隙分布及其空隙率特征[J].岩土力学,2011,32(2):533-536,4.基金项目
国家重点基础研究发展计划(973)基金项目(No.2005CB221504) （973）
国家自然科学基金重点资助项目(No.50534080) （No.50534080）
国家自然科学基金资助项目(No.50874070). （No.50874070）
