煤矿立井次生地压分布规律研究之一——底含层大幅疏水沉降情况下  

Research on Distribution Regulation of Secondary Stress of Shaft——Under Condition of Bottom Aquifer Great Subsidence by Dewatering

作　　者：经来旺[1] 薛学贵[1] 郝朋伟[1] 叶丽萍[1] 赵克秀[1] 张宏学[1] 张宁[1] 

机构地区：[1]安徽理工大学理学院力学系,安徽淮南232001

出　　处：《安徽理工大学学报（自然科学版）》2011年第1期1-4,共4页Journal of Anhui University of Science and Technology:Natural Science

基　　金：国家十一五科技支撑项目(2007BAK24B01);安徽省自然科学基金资助项目(11040606M101)

摘　　要：针对第四纪冲积层底部含水层疏水引发立井次生地压发生与变动的情况,展开次生地压分布规律的研究。通过将底部含水层之上的表土划分成若干薄板单元进行受力与变形的解析分析,揭示立井次生地压与原始地压相比已经发生了巨大的变化,随着距地表距离的增大,立井次生地压显现出趋于稳定值的特征。因为次生地压的分布规律直接关系着作用于外井壁之上的竖向附加力分布规律,因此,研究结果对煤矿立井井壁破裂规律的研究具有重要意义,对深厚表土层中立井井壁结构的优化设计具有重要的参考价值。Aiming at secondary strata stress occurrence and change in shaft of coal mine caused by dewatering of bottom aquifer of thick silting deposit formed in quaternary period,the secondary strata stress distribution regulation was studied.Surface soil on bottom aquifer was divided into some thin-plate elements in order to analyze stress and deformation.The results showed that the secondary stress changes a lot compared with the initial strata stress,and the secondary stress levels off with increase of the distance from the ground surface.As distribution regulation of secondary stress influences on regulation of vertical additional stress acting on outside shaft lining,the results have great significance for research of shaft lining fracturing regulation,and important reference value to optimal design of shaft lining structure in deep alluvium.

关 键 词：立井 次生地压 薄板单元 

分 类 号：TD262.11[矿业工程—矿井建设]