Study on the Waste Backfill-Mining Method with Back Forward Style and Relevant Laws
|School||Shandong University of Science and Technology|
|Keywords||Research stone filling Critical layer Surface deformation Along goaf Floor Failure Depth Filling step|
Mine gangue emissions large coal resources for the sluggish coal reserves in the present, China's coal mine \serious pollution , such as a series of economic and environmental issues , combined with the actual production of the co- Mine geological conditions , study and formulate facing away from advancing waste filling mining method . The method has high production efficiency , production system layout simple and low cost of filling the many advantages of the three next \The waste filling purpose is to ensure that the surface deformation within the allowable range , to reduce the depth of the destruction of the exploitation of mining floor . Based on a critical layer of strata control theory and the theory of waste filling the integrated use of theoretical analysis , numerical simulation and field measurement methods and means to study the movement of the overlying strata and surface deformation characteristics and laws of the waste filling mining conditions , research the results show that the field measurement , the native waste filling the goaf defines the critical layer bending sinking , can effectively control surface deformation . Overlying strata movement research based on a combination of theoretical studies and numerical simulation methods , forward style along goaf surrounding rock stress and displacement evolution of the law as well as the surrounding rock deformation under mining waste filling , failure characteristics . Discovered through research , and fill mining conditions , the use of the forward style along goaf technology can reduce the surrounding rock deformation rheology and the timing and extent of mining influence , good control to stay Lane . Finally, theoretical calculations of filling mining conditions backplane stress distribution , numerical simulation analysis the influence of different filling parameters on the destruction of the coal seam floor fill mining conditions . And field measurement method validation the waste filling mining can effectively reduce the depth of the destruction of the coal seam floor , provides a new mining basis and method for bearing water in mining .