破碎、较破碎岩体渗透系数与埋深关系的研究——以某石灰石矿山为例

吴占廷

吴占廷.破碎、较破碎岩体渗透系数与埋深关系的研究——以某石灰石矿山为例[J].贵州地质,2023,40(2):159-164

破碎、较破碎岩体渗透系数与埋深关系的研究——以某石灰石矿山为例

Research on the Relationship between Permeability Coefficient and Burial Depth of Broken and Relatively Broken Rock Masses——A Case Study of Some Limestone Mine

投稿时间：2023-01-19

DOI：

中文关键词: 破碎岩体渗透系数地表渗透系数深度

英文关键词:Broken rock mass,Permeability coefficient Surface permeability coefficient Depth

基金项目:

作者	单位
吴占廷	西北综合勘察设计研究院贵阳分院，贵州贵阳550001

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中文摘要:

岩体的渗透性与其埋深关系紧密，一般表现为岩体的渗透性随埋深增加而逐渐减小的规律，本文开展破碎、较破碎岩体随单一埋深关系的渗透系数研究，采用负指数相关性模型和幂次函数模型对丽江古城某石灰石矿山在地表浅部55 m深度范围进行的5次压水水样数据进行拟合相关模型计算参数，发现幂次函数模型的相关性(R=0916 5)比负指数模型相关性(R=0884 2)优越。并根据拟合参数与CHEN Y F(2018)通过我国西南地区12个大坝上万组注水试验数据得出的拟合参数进行对比，得出基于常数头注水试验在地表以下较浅深度段的渗透系数可以代替地表渗透系数，采用多段不同埋深渗透系数拟合K0时宜采用负指数相关模型，确定地表渗透系数后或已知地表渗透系数的情况下宜采用幂次函数模型预测不同深度渗透系数。

英文摘要:

The permeability of rock mass is closely related to its burial depth，which is generally shown as the law that the permeability of rock mass decreases gradually with the increase of burial depth. In this paper，the permeability coefficient of broken and relatively broken rock mass with a single burial depth is studied，and the negative exponential correlation model and power function model are used to fit the relevant model calculation parameters for the five times of water pressure sample data of a limestone mine in Lijiang Ancient City at the depth of 55m in the shallow surface，It is found that the correlation of power function model (R=0.916 5) is superior to that of negative exponential model (R=0.884 2). According to the comparison between the fitting parameters and the fitting parameters obtained by Chen Yifeng (2018) through tens of thousands of sets of water injection test data of 12 dams in southwest China，it is concluded that the permeability coefficient based on the constant head water injection test at the shallower depth below the surface can replace the surface permeability coefficient，and the negative exponential correlation model should be used when fitting K0 with the permeability coefficient of multiple sections with different burial depths，After determining the surface permeability coefficient or when the surface permeability coefficient is known，the power function model should be used to predict the permeability coefficient at different depths.

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