地下煤层开采覆岩离层注浆减少地面沉陷技术

GROUTING INTO ABSCISSION LAYER TO REDUCE SUBSIDENCE OF SURFACE

煤矿井下开采使上覆岩层陷落而造成地面沉陷及建筑物破坏 ,严重制约当地经济发展、影响企业经济效益和煤炭资源的回收 ,并由此引发一系列社会矛盾 ,成为煤矿开采亟待解决的紧迫问题。开滦集团公司唐山矿在建筑物下特厚煤层开采中 ,采用地面钻孔对覆岩离层缝隙灌注粉煤灰浆 ,取得减少地面沉陷 ,实现综采放顶煤。高产高效安全开采、提高经济效益和社会效益的综合效果 ,是解决地下煤层开采和减少地面沉陷矛盾的一项值得推广应用的有效技术。

Due to underground mining of coal,there occurs always subsidence of surface.The subsidence not only causes demage of buildings influencing negatively the normal production and living order but also creates a series of social troubles.To ensure safe underground mining of coal without losses resulted from surface subsidence,Tangshan Coal Mine of Kailuan Groups Inc\^has successfully adopted the technology of grouting into abscission layer and achieved good economic as well as social benefits.This technology is of great worth to be spreaded.