An artificial dam of distributed coal mine underground reservoir and its constructing method

摘要

A man-made retaining dam for an underground reservoir with a coal mine distributed around, and a damming method of same. The man-made retaining dam comprises a support layer (10), an anti-seepage layer (20), and a concrete structure layer (30) that are successively formed in an auxiliary tunnel (1) from inside to outside, the concrete structure layer (30) being embedded into a safety coal pillar (2) and/or surrounding rock (3) around the auxiliary tunnel (1). Because the concrete structure layer (30) is embedded into the safety coal pillar (2) and/or the surrounding rock (3) around the auxiliary tunnel (1), the man-made retaining dam is combined to the safety coal pillar (2) to together form a retaining dam for an underground reservoir. Due to multi-layer design, anti-seepage performance and structural strength of the retaining dam can meet the water storage requirements of the underground reservoir.