DOI: 10.11799/ce201611049
Ground grouting reconstruction practice for thin limestone aquifer in working face floor in syncline axis area
WEI Da-yong
Abstract：Ⅱ632 and Ⅱ633 working face of Hengyuan coal mine deep mining area distribute across Wenzhuang syncline structure. Wenzhuang syncline structure presents some special properties including complex geological structure, good water-abundance and high groundwater pressure. To mine the deep resource of No. 6 coal seam, and eliminate the water inrush risk from the floor confined limestone aquifer, an advance grouting program to reconstruct the thin-layer limestone by ground bedding holes is proposed to find a safe, efficient and feasible technology method for water prevention and control. The field test results show that the average bedding rate of limestone aquifer, the unit water absorption of grouted layer, the resistivity of limestone after grouting and flow out from the holes all reach the expected values. In addition, during the mining of Ⅱ632 and Ⅱ633 working face, there is no water flow out from the grouted limestone aquifer.
Keywords：syncline axis areaadvance grouting reconstructiontechnology for water prevention and controllimestone aquifer
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 23-26,30 )