贵州省黔西县龙场煤矿南回风立井地面预注浆工程得失探讨

龙场煤矿南回风井采用立井开拓方式,设计直径φ5.5m,掘深268m。根据井检施工报告,揭露断层破碎带一处,含水层3段,预计涌水量37m^3/h。按照立井施工规范,必须进行预注浆处理。为此,设计共分三个层序,每层序各3孔共9孔（其中最后层序3个孔为检验加强孔）。因业主不同意施工第三层序孔,预注浆处理后井筒涌水量将近10m^3/h,但仍未达到全井少于6m^3/h的目的,以致未达到设计目的,增加了施工难度,延缓了工期。本文就注浆施工从设计到施工进行剖析,指出施工中的得失,对类似工程有指导作用。

Discussion on Gains and Losses of Surface Advance Grouting Project for South Upcast Shaft,Longchang Coalmine,Qianxi County,Guizhou Province

The development method of the south upcast, Longchang coalmine uses shaft mode with designed diameter 5.5m, depth268 m. According to wellbore check data, revealed 1 shattered fault zone, 3 aquifers and predicted water inflow 37m^3/h. Comply withshaft construction specifications, advance grouting should be carried out. For this purpose, 3 processes have been designed, 3 boreholesfor each, totally 9,（in which, 3 for last process are checking and strengthening boreholes）. Because of owners do not endorse the thirdprocess boreholes, brought on shaft water inflow near 10m^3/h, fell short of 6m^3/h target. So that the designed goal failed to meet, opera-tion difficulty increased, time limit postponed. The paper analyzed the grouting from design to construction, pointed out gains and loss-es in construction that have instructive significance in similar projects.