摘要
杭来湾煤矿煤层埋深230 m,为典型近浅埋煤层,矿井地表为毛乌素沙漠与黄土高原交接地带,环境较为脆弱。为满足301盘区和302盘区分区通风及安全需求,在井田中部采用普通法施工开凿了一号进风立井和一号回风立井。由于井筒凿进过程需要通过3层承压含水层,为保障凿进工作面的安全、减小对承压含水层的破坏、保护脆弱的地表环境,提出了近浅埋煤层立井施工注浆过承压含水层技术。在分析地质资料的基础上,通过在开凿过程中预先探测承压含水层涌水量,并利用超前预注浆施工工艺控制凿进工作面的涌水量。技术应用后,井筒最大涌水量从75 m^(3)/h降到1 m^(3)/h以下,提高了作业环境质量、加快了井筒工程进度、保障了凿进工作面的安全,具有一定的推广价值。
The coal seam of Hanglaiwan Coal Mine is 230 m deep,which is a typical near shallow coal seam.The surface of the mine is the junction zone between Maowusu Desert and Loess Plateau,and the environment is relatively fragile.In order to meet the zoning ventilation and safety requirements of panel 301 and panel 302,No.1 air inlet shaft and No.1 air return shaft are excavated by common method in the middle of the mine field.In the process of shaft construction,it is necessary to pass through three layers of confined aquifer.In order to ensure the safety of shaft construction,reduce the damage to the confined aquifer and protect the fragile surface environment,the technology of grouting through confined aquifer in the construction of vertical shaft in near shallow coal seam is proposed.Based on the analysis of geological data,by detecting the water inflow of confined aquifer in advance,the water inflow of working face is controlled by advanced pre-grouting construction technology.After the application of the technology,the maximum water inflow of the shaft is reduced from 75 m^(3)/h to less than 1 m^(3)/h,which improves the quality of the working environment,speeds up the progress of the shaft project,and ensures the safety of working face,which has a certain popularization value.
作者
姚纪凯
YAO Jikai(Shaanxi Yulin Energy Group Co.,Ltd.,Yulin 719099,China)
出处
《陕西煤炭》
2021年第5期147-150,179,共5页
Shaanxi Coal
关键词
榆神矿区
立井普通法施工
超前预注浆
过承压含水层
Yushen mining area
common method construction of shaft
advance pre-grouting
confined aquifer
