深厚表土层井壁破裂机理及防治技术研究进展

Research Progress on Mine Shaft Liner Breaking Mechanism and Prevention Technologies in Deep and Thick Overburden

介绍了深厚表土层中立井井壁破裂机理及其防治技术的研究状况及进展,分析了表土段立井井壁的破裂原因,对广泛采用的竖直附加力理论以及其他一些理论进行了讨论,指出采矿活动使地下水位下降,地层固结压缩引起上覆土体下沉,从而产生作用在井壁上的一个竖直附加力,竖直附加力是井壁发生破裂的主要原因。针对这一原因,对目前防治井壁破裂的常用措施进行了阐述、分析和评价,并对井壁破裂机理与防治技术措施中存在的问题进行了探讨。

The paper introduced the research status and progress on mine shaft liner breaking mechanism and the prevention technology in the deep and thick overburden and analyzed the breaking causes of the mine shaft liner in the overburden section.The paper had a discussion on the wide applied the vertical additional force theory and other theories.As pointed out,the mining activities could make underground water table dropping and the strata consolidation and compaction could cause the overburden subsidence.Therefore a vertical additional force would be effected on the mine shaft liner and the vertical additional force would be the main factor to cause breakings on the mine shaft liner.According to the cause,the paper had an introduction,analysis and evaluation on the conventional measures to the present prevention of the mine shaft liner breaking and had a discussion on the mine shaft liner breaking mechanism and existing problems in the technical prevention measures.