【摘要】 为掌握地表沉陷的一般变形规律,需研究厚松散层下采煤地表沉陷终态变形特征和地表沉陷动态变形特征,对云驾岭矿三采区开展了系统的地表沉陷监测,分析研究了地表沉陷终态移动变形特征及角量参数求取,地表下沉速度,地表下沉速度滞后和地表移动延续时间。研究结果表明:地表沉陷范围广,充分采动角为:走向左70°、走向右61°、走向边界角57°、下山边界角81°、走向移动角67°,下沉速度快,下沉活跃阶段仅为15 d,占整个地表移动时间的6%,最大下沉速度滞后距分别为146 m和143 m,衰退阶段下沉量小,但周期较长,上述结果验证了厚松散层下重复采动时,地表下沉与采动程度呈正比,活跃期的下沉周期短,衰退阶段周期长等特征。更多还原

【Abstract】 Based on the general deformation law of surface subsidence,the characteristics of the final deformation of the surface subsidence and the dynamic deformation characteristics of the surface subsidence under the thick loose layers were studied,and the systematic surface subsidence monitoring was carried out in the third mining area of Yunjialing Mine,and the characteristics of the final movement and deformation of the surface subsidence,the calculation of the angular parameters,the subsidence rate of the ground surface,the velocity of ground subsidence and the duration of ground movement were analyzed and studied.The results show that the subsidence area is wide,and the full mining angle is 70° to the left,61° to the right,57° to the boundary angle,81° to the lower boundary angle,and the strike angle is 67°.The sinking speed is fast and the active phase is only 15 days,accounting for 6% of the total surface movement time.The maximum subsidence velocity lag distance is 146 m and 143 m respectively,and the subsidence amount is smaller but the cycle is longer in the recession stage.The above results show that when the mining is repeated under thick loose layer,the subsidence of the ground surface is directly proportional to the degree of mining,the subsidence period of active period is short,and the period of the decline stage is long.更多还原