Strong-upper anti-seepage water retaining dam for underground reservoir of coal mine

Abstract

The invention discloses a strong-upper anti-seepage water retaining dam of an underground reservoir of a coal mine, which is positioned between coal pillar dam bodies to isolate the underground reservoir and a corresponding coal roadway, wherein a dam body comprises a main dam and a strong-upper part, the strong-upper part is formed by extending at least a length of S1 towards the underground reservoir based on the thickness of the main dam, the extended S1 part also forms a first anti-seepage part, the strong-upper part is embedded into the coal pillar dam bodies on both sides, the upper endsof the storing-upper part and main dam are embedded into surrounding rock of the roof of the roadway, and the lower ends of the main dam and the strong-upper part are embedded into the surrounding rock of the floor of the roadway. As the water retaining dam is positioned in the underground coal rock stratum roadway and is subjected to complex surrounding rock stress, the water retaining dam effectively overcomes the phenomena of weak upper parts at two sides of the roadway of a prior water retaining dam and easy water seepage, and also reduces the local pressure of the dam body to the coal pillar dam bodies at two ends of the roadway, the stability of the dam body and the whole body is improved, and the water storage and safety requirements of the underground reservoir of the coal mine are met.

Description

technical field [0001] The invention relates to the intersecting field of mining engineering and water conservancy engineering, in particular to a coal mine underground reservoir with strong support and seepage-retaining dam. Background technique [0002] The construction of sluice gates and sluice walls is regulated in the "Coal Mine Safety Regulations" and "Coal Mine Water Prevention and Control Regulations", which are mainly based on the perspective of water prevention and control, without considering the long-term role of underground reservoir water storage; The construction of the dam body has been stipulated in more detail. Although there have been related studies on the construction of the retaining dam of the distributed underground reservoir in coal mines, the construction of the dam body of the surface reservoir and the construction of the retaining dam of the underground reservoir are obviously different. [0003] Comparing the dam body of the underground reservoi...

AI Technical Summary

Problems solved by technology

Although the patent further sets up left and right shoulders on both sides of the dam body, the role of the shoulders is to connect the main dam and the coal pillar dam body, and at the same time transmit the water pressure of the reservoir from the main dam to the coal pillar dam body, which determines The depth of the embedding of the shoulder into the coal pillar dam is relatively shallow (0.3-0.5m), and the width of the shoulder is also narrow (the same as the thickness of the dam body), and the weak parts of the coal pillar dam on both sides of the coal roadway are not considered. Local stress failure and seepage problems

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