孤立覆岩注浆工作面突水识别与预测方法

IF 3.4 3区 工程技术 Q3 ENERGY & FUELS
Chaochao Wang, Jialin Xu, Dayang Xuan
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引用次数: 0

摘要

孤立覆岩注浆是一种经济、高效的绿色采矿技术。在注浆过程中,大量浆体渗水会进入注浆层下方的下伏岩层。在一定条件下,浆体渗水可能沿上覆岩层渗入导水裂隙带,导致工作面突水增大,影响生产安全和注浆效果。因此,迫切需要建立工作面突水预测模型,建立安全的注浆层选择方法,防止注浆充填过程中注浆水进入工作面。本文提出了一种新的IOGI工作面突水识别与预测方法。根据渗流边界的特点,建立了浆体渗水渗流边界的“半椭球”理论模型,并构造了模型参数的无因次公式。根据渗流边界影响因素的试验结果,求解了无量纲公式。根据注浆充填中自由水的分布特点,建立了IOGI工作面突水识别与预测方法。将该预测方法结合实际矿山进行了分析,验证了预测方法的正确性。利用提出的预测方法,采用注浆层(注浆层与煤层顶板之间的距离>;为保证注浆过程中浆体渗水不进入工作面,给出了渗流边界|c| + WCFZ高度Hd)。从而保证注浆工作的有效实施。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Identification and Prediction Method of Working Face Water Inrush of Isolated Overburden Grout Injection

Identification and Prediction Method of Working Face Water Inrush of Isolated Overburden Grout Injection

Identification and Prediction Method of Working Face Water Inrush of Isolated Overburden Grout Injection

Identification and Prediction Method of Working Face Water Inrush of Isolated Overburden Grout Injection

Identification and Prediction Method of Working Face Water Inrush of Isolated Overburden Grout Injection

Isolated overburden grout injection (IOGI) is an economical and efficient green mining technology. During the grout injection process, a large amount of slurry bled water will enter the underlying rock strata below the grouting layer. Under certain conditions, the slurry bled water may seep along the overlying rock layer into the water-conducting fractured zone (WCFZ), resulting in the increase of water inrush in the working face, which affects the production safety and the grouting effectiveness. Therefore, it is urgent to establish the prediction model of working face water inrush and establish a safe grouting layer selection method to prevent the grouting water from entering the working face in the process of grouting filling. In this article, a new identification and prediction method of working face water inrush of IOGI were proposed. According to the characteristics of seepage boundary, a “semi-ellipsoid” theoretical model of seepage boundary of slurry bled water was established, and a dimensionless Formula of the model parameters was constructed. The dimensionless Formula was solved based on the experimental results of influencing factors of seepage boundary. Based on the distribution characteristics of free water in grouting filling, the identification and prediction method of working face water inrush of IOGI were established. The prediction method was analyzed to the actual mine, and the correctness of the prediction method was verified. Using the proposed prediction method, a selection method of grouting layer (the distance between grouting layer and coal seam roof > seepage boundary |c| + the height of WCFZ Hd) was given to ensure that the slurry bled water will not enter the working face during the grout injection process. So as to ensure the effective implementation of grout injection work.

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来源期刊
Energy Science & Engineering
Energy Science & Engineering Engineering-Safety, Risk, Reliability and Quality
CiteScore
6.80
自引率
7.90%
发文量
298
审稿时长
11 weeks
期刊介绍: Energy Science & Engineering is a peer reviewed, open access journal dedicated to fundamental and applied research on energy and supply and use. Published as a co-operative venture of Wiley and SCI (Society of Chemical Industry), the journal offers authors a fast route to publication and the ability to share their research with the widest possible audience of scientists, professionals and other interested people across the globe. Securing an affordable and low carbon energy supply is a critical challenge of the 21st century and the solutions will require collaboration between scientists and engineers worldwide. This new journal aims to facilitate collaboration and spark innovation in energy research and development. Due to the importance of this topic to society and economic development the journal will give priority to quality research papers that are accessible to a broad readership and discuss sustainable, state-of-the art approaches to shaping the future of energy. This multidisciplinary journal will appeal to all researchers and professionals working in any area of energy in academia, industry or government, including scientists, engineers, consultants, policy-makers, government officials, economists and corporate organisations.
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