摘要
通过对底部含水层疏排水沉降的研究成果和底部含水层水压降与竖直附加力试验资料的整理得出 :底部含水层疏排水应变是水压降的线性函数 ,压缩模量受特征粒径和水压降控制 ;井壁平均竖直附加力与底部含水层垂直应变ε可用线性表达式表示 ,回归系数α受土质和埋藏深度的影响 ;根据α随埋藏深度的变化率 ,建议将 1 5 0 m作为浅。
It can be concluded that, with the results of researches on the dewater subsidence of bottom aquifer, and with the help of the materials of experiments about the hydraulic pressure fall of bottom aquifer and the additional vertical force, the dewater strain of bottom aquifer is the linear function of the hydraulic pressure fall, and the compressibility modulus is determinated by the characteristic grain D20 and the hydraulic pressure fall. The relationship of the average additional vertical force and the vertical strain of bottom aquifer can be expressed as follows, among which the regression coefficient-α is affected by soil property and embedding depth. According to the changing rate of α in embedding depth, the author proposes that the depth of 150 m be the boundary between the shallow stratum soil and the deep one.
出处
《矿山压力与顶板管理》
北大核心
2003年第4期1-3,118,共3页
Ground Pressure and Strata Control
基金
焦作工学院博士基金资助项目 ( 2 0 0 0 0 4)
