注浆充填保水置换煤炭技术实践

Practices of Grout Filling Water Conservation Coal Replacement Technology

新方矿井位于山东省潍坊市坊子区南部,区内地表水缺乏,地下水严重不足。新方矿井4201下山采区地质构造复杂,回采中断层带及附近易发生底板突水,影响工作面安全生产,需留设较多的断层防水煤柱,煤柱内压煤量大。为充分开采煤炭资源,同时有效保护煤层底板太古界花岗片麻岩水资源,确保矿井可持续发展,采用回采工作面超前注浆充填断层破碎带的措施,封堵底板导水裂隙,实现防止底板大量涌水,达到充分开采置换煤炭资源的目的。以该采区3#工作面为例,介绍了注浆钻孔的布置原则及施工过程,进而对保水效果进行了评价。回采证实,工作面注浆充填后,涌水量大幅降低,可确保工作面安全回采,同时有效保护了地下水资源,对减缓潍坊市"水量性缺水"现状起到了积极的作用。

The Xinfang coalmine is situated in the southern Fangzi District, Weifang City, Shandong Province; surface water in the area is insufficient, groundwater serious shortage. The No.4201 dip stoping area has complicated structures, in faulted zone and periphery can easily cause floor water bursting during winning and impact working face safety in production. Thus more fault water barrier is needed and caused large amount of protecting coal. To fully exploit coal resources and effectively protect Archean granite gneiss water resources under coal measures floor, ensuring coalmine sustainable development, thus production face advanced grout filling in shat- tered fault zone is used to plug floor water conducted fractures, prevent floor water gushing, and realize full coal resources replacement target. Taking the No.3 production face in the stoping area as an example, introduced grouting boreholes layout principle and operation procedure, and then assessed water conservation effect. The coal winning has confirmed that after production face grouting, largely reduced water inflow, ensured safety in winning, meanwhile effectively protected groundwater resources, and actively mitigated the ＂quantitative water shortage＂ status in Weifang City.