深部土K0参量在井壁稳定性验算中的研究  

APPLICATION OF K0 PARAMETER OF DEEP BURIED SOILS IN CHECKING COMPUTATION OF SHAFT STABILITY

作　　者：孙如华[1] 李文平[1] 张志勇 王维理[3] 

机构地区：[1]中国矿业大学资源学院,徐州221116 [2]上海市地矿建设有限责任公司,上海200072 [3]北京市勘察设计研究院,北京100038

出　　处：《地质与勘探》2008年第4期83-86,共4页Geology and Exploration

基　　金：国家自然科学基金项目(编号:40272114,40572160);中国矿业大学青年科研基金项目(编号:206A017)共同资助

摘　　要：水平地压计算方式考虑了土的天然特性,利用自行设计的高压K0蠕变试验系统试验得到深部土的K0参量,作为研究山东省巨野矿区埋深近700m的巨厚土层中煤矿立井水平地压大小计算参数,模拟实际状况。分析表明,在厚表土地区进行井筒建设中,由于含水层失水造成井壁竖向附加应力的存在,所以在该类地区进行井筒建设时,不但要进行环向稳定性验算,还应该进行竖向稳定性验算,该类地区井筒破坏主要是由于竖向附加应力引起的。Natural feature of soils is considered during calculation of horizontal geopressure. K0 parameter gained from the high - pressure creep equipment is used to calculate horizontal stress of shaft lining with nearly 700 m buried soils in the Juye coal mine, Shandong province. Analyses prove that there exists a vertical additional stress due to dehydration of aquifer during shaft construction in a thick regolith area. Checking computations of the vertical stability and the hoop stability are needed. Destruction of shaft is mainly caused by vertical additional stress.

关 键 词：深部土 井壁稳定性K0参量 地压 附加应力 

分 类 号：P628[天文地球—地质矿产勘探]