金矿超深立井含水围岩注浆加固的应力场和渗流场研究

doi:10.13722/j.cnki.jrme.2020.0271

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摘要为了适应矿山超深竖井建设发展，首先在引言中通过超深竖井实际施工和永久支护设计中存在的矛盾和难点，提出基于弹性状态解决工程问题的目的和思路。其次，基于达西渗流定律、太沙基有效应力原理和连续介质弹性力学理论，研究黄金矿超深竖井含水地层注浆加固渗流场与应力场耦合的数学模型，推导渗流场及应力场的解析表达式。通过与数值方法对比，验证解析公式的准确性。第三，通过公式图形化展示，研究注浆加固体的渗透系数、注浆半径、泊松比、弹性模量等对于井筒注浆加固体及附近围岩应力场和渗流场的影响规律；运用山东新城金矿新主井算例分析得出的曲线和数据表格，定量展示以注浆半径和渗透系数来对井筒涌水量进行控制的注浆设计方法。研究表明，降低加固体渗透系数和泊松比、增大注浆半径等能有效降低加固体和围岩的有效应力，即有利于改善围岩受力，同时能有效地降低井筒涌水量；上述研究可为井筒注浆设计提供理论参考。

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	周晓敏1
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	徐衍1
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	刘书杰1
	和晓楠1

关键词 ：采矿工程, 超深竖井, 金矿竖井, 流固耦合, 井筒注浆, 基岩渗流, 有效应力

Abstract：In order to meet with the development of ultra-deep mine shaft construction，the conflicts and tough technical problems existing in design and construction are discussed，and the aim and strategy of the solution based on the elastic state and theory of deep shaft lining design and construction are put forward in introduction. Based on Darcy¢s seepage law，Terzaghi¢s effective stress principal and continuous medium elasticity theory，the mathematical model of coupled seepage and stress fields under grouting consolidation in deep gold mine shafts is studied, and the expressional formulas of seepage and effective stress fields are deduced. Comparison with the numerical method verifies the accuracy of the implicit analytical expressions. By using graphical method，is the effects of the grouting radius，the permeability，the possion¢s ratio and the elastic modulus of grouting area on seepage and effective stress fields are discussed. A case study on Xincheng new main shaft in Shandong province，China，is illustrated, presenting the controlling design method of grouting consolidation based on the grouting radius and the seepage conductivity. It is shown that enlarging the grouting radius or decreasing the seepage conductivity of and the Possion¢s ratio can decrease the effective stress of grouting and surrounding rock，which is benefit to enhance the stability of shafts and to decrease the water flow to the shafts. The research results could provide a theoretical reference for designers and constructors.

Key words： mining engineering ultra-deep shaft gold mine shaft coupled fluid and solid shaft grouting rock seepage effective stress

引用本文:

周晓敏1，2，徐衍1，2，刘书杰1，和晓楠1. 金矿超深立井含水围岩注浆加固的应力场和渗流场研究[J]. 岩石力学与工程学报, 2020, 39(8): 1611-1621.
ZHOU Xiaomin1，2，XU Yan1，2，LIU Shujie1，HE Xiaonan1. Research on stress and seepage fields of surrounding rock grouting of ultra-deep shafts of gold mines. , 2020, 39(8): 1611-1621.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2020.0271 或 http://rockmech.whrsm.ac.cn/CN/Y2020/V39/I8/1611

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