Raw Gangue Filling Mining under Construction <br/>—A Case Study in China

In order to recover the strip pillar coal resources, reduce amount of gangue mountain and realize remediation goaf environment in old mining area, raw filling technology was proposed. According previous practical experience, feasibility implementation coal-pressed area analyzed. Through compaction test, deformation under different loading stages obtained. Further, a reasonable prediction beyond experimental limited load made based on results. source analysis whole process filling, key factors for controlling before, during, after were determined. Additionally, proportion during quantified. Considering protection surface buildings, fullness working face technology, production parameters 1209 1210 faces preliminarily numerical simulation, rationality scheme verified. Based practice control system optimized. measured rock movement, can meet requirements building level. Especially, this paper provides method quantitatively calculate equivalent height (EMH) its deformation, which has reference significance areas.