长壁开采老采空区注浆充填范围确定方法

浅部老采空区注浆充填是保证老采空区建筑物地基稳定的有效措施,在确定充填治理范围时,目前大多采用正在开采的地表移动角确定注浆充填范围,这将导致充填范围过大,造成不必要的浪费,为此,基于国内开采沉陷资料,首先建立了正在开采的地表移动角与深厚比的关系,然后在分析老采空区变形机理基础上,提出了残余移动角的思想,根据残余移动与正在开采的地表移动相似性,建立了残余移动角与老采空区开采深度、等效开采厚度之间的关系,给出了老采空区充填注浆范围的确定方法,为老采空区充填治理范围的确定,提供了可靠的理论和方法.

Determination of Grouting Filling Area in Goaf with Longwall Mining

Filling old shallow goaf by grouting is an effective way to assure the stability of foundation of buildings above the old goaf.The filling area is determined mainly by the surface movement angle that comes from active mining face.The determination method will result in too large a filling area,leading to unnecessary waste.Aiming at this problem,we establish the relation between surface movement angle from active mining face and the depth/thickness ratio based on mining induced subsidence data and then propo...