厚表土采矿工程非采动环境效应

通过水动力学，土力学及井筒热效应分析，论述了我国一些煤矿近年来发生的井筒破裂及地面沉降形成机理。井筒破裂并非单一因素造成的。而是在特定的地质环境中，由于采矿工上起地质环境及力学机制产生的综合环境效应。研究区深部土体失水压缩变形与渗透变形所产生的地面沉降，与浅部土失水压缩变形所产生的地面沉降具有不同的形成机理，主压轴层不在浅部粘土类土层，而在底含的砂、砂砾石类土层中，而深部粘土地不失水压缩变夺主压轴

NON MINING ENVIRONMENTAL EFFECT ON MININGPROJECTS IN THICK SURFACE SOIL

The mechanism of shaft rupture and ground subsidence which happened in some mines recently was studied on the basis of hydrodynamics, soil mechaniscs and shaft thermal effect. Shaft rupture is not resulted from a single factor but comprehensive environmental effect,i.e.it resulted from change of geological environment and mechanical mechanism under special geological conditions. Surface subsidence due to compressive deformation and permeation deformation of soilmass at depth is different from surface subsidence due to water loss compressive deformation of soilmass at shallow depth. The main compressive strum is sand and gravel in the bottom aquifer not clay at shallow depth. The clay at depth does not have water loss compressive deformation. It is related to resistance to compression of a strong constructional layer with absorbed water in expansion soil.