Study On The Foundational Problems Of Mining Subsidence Controlled In Waste Stow

Waste filling is a late-model environment compatible mining technical measures which achieve to reduce subsidence and emission, also one of core content of green mining technology system. This article aims at some problems about waste filling mining.The work of waste on-site screening is developed, and particle diameter law of distribution from raw waste is acquired, adopt fractal and mathematical statistics methods to decide essential screening quantity during waste screening test. On the basis that analysis the reliability of waste compression test and compression performance, test method of waste compression performance is brought forward, and test work of that is developed .Also adopt continuous grading, even grading project methods, and put against compression performance as evaluation criterion to optimize waste graduation. Based on that , combining strata movement similarity criterion, deduce static and dynamic simulation criterion of waste filling , similar material collocation method which is filled with sponge, foam to simulate different compression performance of waste is advanced ; at the same time, analyses waste non-linear deformation nature , numerical model parameter influence surface subsidence,damage height of overlying rock .On the basis of that, utilizing similar material simulation, numerical simulation to research on the law of strata movement, subsidence control mechanism, and combing theory analysis further define that influence mechanism and span of control of subsidence control factor ,subsidence reduction (delaying), damage height of overlying rock, equivalent mining height computational model of waste filling surface subsidence prediction is put forward. Analyses that the relation between waste production and filling in the mining area; based on elastic foundation beam, key strata deformation mechanics model is founded. Adopt numerical simulation and theoretical analysis method to research about the synergistic action relation among key strata, filling and coal pillar, computational method of coal pillar and bearing characteristics of filling is proposed.