辛置煤矿2-216工作面底板局部注浆改造技术应用研究

Application Research on Local Grouting Reconstruction Technology of 2-216 Working Face in Xinji Coal Mine

山西焦煤集团公司辛置煤矿2-216工作面为带压开采工作面,为确保工作面的安全正常回采,通过现场勘测调研、理论分析等方法,采用瞬变电磁法对底板异常富水区进行圈定,据此设计采用底板钻孔局部注浆技术对底板进行改造,注浆工程施工完成后瞬变电磁复探结果及后期2-216工作面的生产状况表明,原有的大面积富水异常已经消失或者减小,工作面正常涌水量为35m3/h,最大涌水量为120m3/h,最终有效杜绝了底板承压水的威胁。

The 2-216 working face of Xinjiao Coal Mine of Shanxi Coking Coal Group Co., Ltd. is a working face with pressure mining. In order to ensure the safe and normal mining of the working face, through the site survey and investigation, theoretical analysis and other methods,the abnormal water-rich area of the bottom plate is carried out by transient electromagnetic method. According to this design, the bottom plate is modified by the local grouting technology of the bottom plate drilling. The transient electromagnetic re-exploration result after the completion of the grouting project and the production status of the 2-216 working face in the later stage indicate that the original large-area water-rich anomaly has been Disappearing or reducing, the normal water inflow on the working surface is 35 m3/h, and the maximum water inflow is 120 m3/h, which ultimately eliminates the threat of pressure on the bottom plate.