Artificial retaining dam for coal mine distributed underground reservoir and damming method thereof

Abstract

The invention discloses an artificial retaining dam for a coal mine distributed underground reservoir. The artificial retaining dam comprises a supporting layer, an impermeable layer and a concrete structural layer which are sequentially formed in an auxiliary roadway from inside to outside; the concrete structural layer is embedded into security coal pillars and / or surrounding rocks around the auxiliary roadway. The invention also discloses a damming method of the artificial retaining dam for the coal mine distributed underground reservoir. The concrete structural layer is embedded into the security coal pillars and / or the surrounding rocks around the auxiliary roadway, so that the artificial retaining dam is combined with the security coal pillars to form a retaining dam for the underground reservoir together. Moreover, due to the multilayer design, impermeability and structural intensity of the artificial retaining dam can meet the requirement of the underground reservoir on water storage.

Description

technical field [0001] The invention relates to the intersection field of coal mining and water conservancy engineering, in particular to an artificial retaining dam for distributed underground reservoirs in coal mines and a dam building method thereof. Background technique [0002] Coal resources in the energy "Golden Triangle" (Shanxi, Shaanxi, Mongolia, Gansu and Ningxia) are characterized by shallow burial depth, thin bedrock, and thick coal seams. In 2011, the coal output in this area was 2.382 billion tons, accounting for 67.7% of the country's total output. It has become my country's coal resource main producing area. However, the ecological environment of the western "Golden Energy Triangle" is fragile. The region has long-term drought, water shortage and uneven temporal and spatial distribution. Taking northern Shaanxi as an example, this area is located inland, with little precipitation and large evaporation. The per capita water resource is only 927 cubic meters, ...

AI Technical Summary

Problems solved by technology

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 made more detailed regulations, but it is obviously different from the construction of the retaining dam of the underground reservoir.

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