A grouting treatment method for gobs in underlying coal mines along railway lines

Abstract

The invention discloses a grouting treatment method for an underlying coal mine gob area along a railway. By virtue of reasonable design on drill hole arrangement, a drill hole construction method, agrouting mode, grouting parameters, grouting stopping of grouting holes, grouting construction sequence and grouting quality detection, and by virtue of a gob area grouting project, influence of deepformation mining on soil intensity of foundation of a shallow part is reduced, uneven settlement is reduced, and overall performance of foundation rock soil body is improved. Through treatment, potential geological hazards in a gob area are eliminated or reduced to the utmost extent, and safe railway operation and social harmony and stability are guaranteed.

Description

technical field [0001] The invention belongs to the field of goaf treatment methods, and in particular relates to a grouting treatment method for the goaf of an underlying coal mine along a railway. Background technique [0002] Over the years of coal mining in my country, a large number of goafs with different depths, areas, and even multi-levels have been formed or are being formed. The goaf is a very complex geological body, which has the characteristics of concealment, complexity, suddenness and long-term. With the rapid development of railway engineering construction, many railway projects cannot avoid going through coal mine goafs. The increase of railway transport capacity, the construction of double tracks, the impact of complex environments such as train dynamic loads and extreme rain and snow on the mined rock mass are more likely to cause surface deformation and goaf collapse, which affects the stability of the railway subgrade and threatens the safety of railway...

AI Technical Summary

Problems solved by technology

Regarding the governance of gobs under highways, the "Grouting Treatment Method for Highway Goafs" (Chinese Patent Publication No. CN 102330567 A, published on January 25, 2012) has been published, and the "Highway Goafs" has been formed. (Empty) Survey, Design and Construction Management Manual" (Edited by Shanxi Provincial Communications Department and China Communications Highway Survey and Design Engineering Co., Ltd., People's Communications Publishing House, 2005), and the management of goafs along the railway has not yet formed a standard Especially for large-scale and multi-layered complex goafs, there is no systematic achievement in the treatment methods, reinforcement range and depth, and quality evaluation standards. A mature theory and engineering design system have not yet been formed, and there are no norms and procedures to follow.

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