I-type rib-reinforcing and seepage-preventing water retaining dam for coal mine underground reservoir

Abstract

The invention discloses an I-type rib-reinforcing and seepage-preventing water retaining dam for a coal mine underground reservoir. The I-type rib-reinforcing and seepage-preventing water retaining dam is located between coal pillar dam bodies on left and right sides of a roadway and used for isolating the underground reservoir from the roadway and blocking a water source in the underground reservoir. A dam body of the I-type rib-reinforcing and seepage-preventing water retaining dam comprises an upper wing plate, a web and a lower wing plate from top to bottom sequentially, wherein the vertical section, perpendicular to the dam surface, of the dam body is I-type; the dam body of the I-type rib-reinforcing and seepage-preventing water retaining dam further comprises reinforced rib parts located on left and right sides of the web, and each reinforced rib part comprises a first seepage preventing part which is formed by extending to one side of the underground reservoir by at least S1 length on the basis of the thickness of the web. The water retaining dam is located in an underground coal seam roadway and receives complicated surrounding rock stress, so that through the adoption ofthe water retaining dam, local instability and failure and water seepage due to overhigh local stress of the coal pillar dam bodies can be reduced, the defect that two rib parts of the roadway of thetraditional water retaining dam are weak and prone to water seepage is overcome effectively, and the requirement for water storage and safety of the coal mine underground reservoir are met.

Description

technical field [0001] The invention relates to the intersecting fields of mining engineering and water conservancy engineering, in particular to an I-shaped dam with strong support and seepage resistance for an underground reservoir in a coal mine. 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 ...

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Problems solved by technology

Although the patent further sets up left and right shoulders on both sides of the dam body, the function of the shoulders is to connect the web and the coal pillar dam body, and at the same time transmit the water pressure of the reservoir from the web plate 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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