采矿与安全工程学报2011，Vol.28Issue(2)：288-292,297,6.
采动底板附加应力计算及其应用研究
Computation of Mining Induced Floor Additional Stress and Its Application
摘要
Abstract
In order to study the stress distribution and deformation law of the floor after the coal seam is excavated, using the elastic theory in the form of increment, we obtain the additional vertical stress, horizontal stress, and shear stress of any point through the MATHCAD software. The distribution map of additional stress of the floor is drawn. According to MohrCoulomb criterion, the additional stress is converted to principal stress, then the failure depth of the floor is predicted with the introduction of the rock strength index and the failure depth of 1022 working face in Taoyuan coal mine is in-situ tested with the hydraulic test method. The results show that the additional concentrated stress near the coal wall decreases gradually with the increase of the depth of floor, and the failure depth of the floor computed is 12％ different from that obtained in the in-situ test, showing a high reliability of the theoretical computation.The results in this paper can provide a theoretical basis for the control of water-inrush in the coal mining under pressure.关键词
采动/底板附加应力/岩石强度指数/突水Key words
mining induced/ additional stress/ rock strength index/ water-inrush分类
矿业与冶金引用本文复制引用
张华磊,王连国..采动底板附加应力计算及其应用研究[J].采矿与安全工程学报,2011,28(2):288-292,297,6.基金项目
国家自然科学基金项目(50874103) （50874103）
江苏省自然科学基金项目(BK2008135) （BK2008135）
国家重点基础研究发展计划(973)项目(2010CB226805) （973）
国家重点实验室开放基金项目(SKLGDUEK0905) （SKLGDUEK0905）
江苏省"333工程"项目 （）
江苏省"六大高峰人才"项目 （）
