Box type water retaining dam for coal mine underground reservoir

Abstract

The invention discloses a box type water retaining dam for a coal mine underground reservoir. The box type water retaining dam is located between coal pillar dam bodies on the left side and the rightside of a roadway and used for isolating the underground reservoir and the roadway and blocking a water source in the underground reservoir. The box type water retaining dam comprises a main dam bodyand water retaining wings, wherein the main dam body is of a box type structure, the left side and the right side of the main dam body are embedded in the coal pillar dam bodies on the two sides, thetop of the main dam body is embedded in roadway roof surrounding rock, and the bottom of the main dam body is embedded in roadway bottom plate surrounding rock; and the water retaining wings compriseside wings, the side wings are connected with the left side and the right side of the main dam body and arranged along at least the whole height range of the main dam body, the side wings are embeddedinto the coal pillar dam bodies on the two sides to a certain depth, and thus side wing seepage prevention areas are formed. The box type water retaining dam can reduce crippling and water seepage caused by excessive local stress of the surrounding rock at the same time, adjusts differential settlement, prevents the surrounding rock from being softened due to water entering, and ensures the stability and safety of the dam bodies.

Description

technical field [0001] The invention relates to the intersecting fields of mining engineering and water conservancy engineering, in particular to a box-type retaining dam of underground reservoirs in coal mines. 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 reservoir of the coal ...

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Problems solved by technology

[0008] The applicant’s prior invention patent applications CN201910087850.2, CN201910086889.2 and CN201910087871.4 all disclose a coal mine underground reservoir retaining dam, which is located between the coal pillar dams on the left and right sides of the roadway and is used to isolate the underground reservoir and The roadway blocks the water source in the underground reservoir, but the main structure of the dam body adopts the I-shaped concrete structure dam body, and the left and right ends of the "I"-shaped upper flange, web and lower flange are embedded in the In the coal pillar dam, the upper wing plate is embedded in the surrounding rock of the roadway roof, and the lower wing plate is embedded in the surrounding rock of the roadway floor. The combined structure of the I-shaped wing and web is relatively complicated, and the effect of the upper and lower wings in solving local stress damage is limited. Not very good

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