于世波, 王志修, 原野, 等. 2021. 矿山垮落大体积松散体中水泥-水玻璃浆液可控灌注原理及其应用[J]. 工程地质学报, 29(4): 1094-1104. doi: 10.13544/j.cnki.jeg.2021-0322.
    引用本文: 于世波, 王志修, 原野, 等. 2021. 矿山垮落大体积松散体中水泥-水玻璃浆液可控灌注原理及其应用[J]. 工程地质学报, 29(4): 1094-1104. doi: 10.13544/j.cnki.jeg.2021-0322.
    Yu Shibo, Wang Zhixiu, Yuan Ye, et al. 2021. Principle and application of controllable grouting of cement-sodium silicate slurry in large loose rock mass due to mining caving[J]. Journal of Engineering Geology, 29(4): 1094-1104. doi: 10.13544/j.cnki.jeg.2021-0322.
    Citation: Yu Shibo, Wang Zhixiu, Yuan Ye, et al. 2021. Principle and application of controllable grouting of cement-sodium silicate slurry in large loose rock mass due to mining caving[J]. Journal of Engineering Geology, 29(4): 1094-1104. doi: 10.13544/j.cnki.jeg.2021-0322.

    矿山垮落大体积松散体中水泥-水玻璃浆液可控灌注原理及其应用

    PRINCIPLE AND APPLICATION OF CONTROLLABLE GROUTING OF CEMENT-SODIUM SILICATE SLURRY IN LARGE LOOSE ROCK MASS DUE TO MINING CAVING

    • 摘要: 松散体是采矿、隧道、地下空间等工程中一种常见的岩体结构,具有强度低、稳定性差等特点,注浆改造重构其完整性和强度是现场处理该类问题的重要技术手段之一。为满足河北杏山铁矿大垮塌主溜井满井状态下封堵工程的特殊需求,提出了大体积松散体中水泥-水玻璃浆液可控灌注的理念。通过大体积松散体中水泥-水玻璃浆液灌注试验研究,将灌注历程分为大空隙竖向优势渗流、大空隙周边渗流、上向渗流结石、第1层劈裂与渗流和第n层劈裂与渗流5个阶段。根据浆液扩散的时空演化,将可控灌注问题分解为浆液一维竖向优势渗流和单段灌注浆的周向时空扩散,并揭示了其发生机理,认为松散体中水泥-水玻璃浆液一维竖向优势渗流的扩散距离与时间呈以自然常数e为底的指数函数关系。以此为基础,将松散体中水泥-水玻璃浆液可控灌注应用于杏山铁矿大垮塌主溜井满井状态下的封堵工程中,取得了良好的工程效果。

       

      Abstract: Loose rock mass is a kind of common rock mass structure in mining,tunnel,underground space and other projects. It has the characteristics of low strength and poor stability. Grouting reconstruction is one of the important technologies to enhance its integrity and strength in site. To meet the special needs of the plugging project of the main ore pass with large-scale collapse under the condition of full rocks in Hebei provincial Xingshan Iron Mine,the concept of the controllable grouting of cement-sodium silicate slurry in the large loose rock mass is adopted. Based on the experimental study of cement-sodium silicate slurry grouting in the large volume loose rock mass,the grouting process was divided into the following five stages. They are vertical dominant seepage with macrovoid,circumjacent seepage with macrovoid,superior seepage stone,splitting and seepage of the first layer and splitting and seepage of the nth layer. According to the spatiotemporal propagation of slurry,the controllable grouting problem was divided into the one-dimensional vertical dominant seepage of cement-sodium silicate slurry and the circumferential spatiotemporal diffusion of single-stage grouting. and the mechanism of its occurrence was revealed that there is an exponential function with base e between the diffusion distance and the time of the one-dimensional vertical dominant seepage of cement-silicate slurry in the loose rock mass. On the basis of the above experimental results,the technology of the controllable grouting of cement-silicate slurry in the loose rock mass was applied to the plugging project of the main ore pass fully filled with large-scale collapsed rocks in the Xingshan Iron Mine,and good engineering performance were achieved.

       

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