Analysis on Water Abundance of Loose Aquifer and Quality Evaluation of Overburden Strata during Mining under Loose Aquifer

Abstract:

The establishment of pillars is one of the most effective methods to keep mining safety under loose aquifer. Water abundance of bottom aquifer of loose strata,strength and structure of overburden strata are the main factors controlling type and height of coal pillar.Taking Xiyi area in Pansan coal mine as an example, hydrogeology characteristics of the bottom aquifer of quaternaty system and engineering geological properties of overburden strata of No.8 seam were analyzed.The characteristics of weathered rock was particularly analyzed.The results indicated that the type of the water abundance and permeability in this aquifer were medium.When the No.8 seam in Xiyi area was at shallow depths mining, water-proof pillar had to be designed.The structure of overburden strata of No.8 seam belonged to the type of upper soft and lower hard,which can restrain the failure of overburden strata.The thickness of weathering zone was thick and distribution was also stable.Weathered rock had good water-resisting property and crack resistance.

• Periodical: Advanced Materials Research (Volumes 1006-1007)
• Pages: 73-77
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1006-1007.73
• Online since: August 2014
• Authors: Hai Feng Lu*, Lin Wang
• Keywords: Safe Coal Pillar, Structure of Overburden Strata, Water Abundance, Weathering Zone

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