Xi’an Research Institute,CCTEG,Xi’an ,China

为了治理潘集二矿重大突水事故,提出了地面定向水平孔技术截流堵源的方案。潘集二矿12123工作面上、下底抽巷联络巷底板发生突水,瞬时最大突水量达14 000 m3/h,矿井部分被淹。因工作面上方存在湖泊和多个采空区,遂选择地面定向水平钻孔施工方案,即在地面施工一个定向水平堵源主孔对突水点灌注沙石骨料完成充填、形成顶板盖层,再通过主孔由地面注浆站灌注水泥浆完成陷落柱的封堵工作,并施工四个水平分支孔探查了陷落柱形态特征。结果表明,陷落柱导水通道被成功封堵,堵水率达到100%,显示了地面定向水平钻孔技术在陷落柱突水治理中的优越性,为今后类似突水事故的治理提供了宝贵的经验。

In order to control the major water inrush accident in Panji No.2 coal mine, a scheme for intercepting the source of the ground oriented horizontal hole technology was proposed. The water inrush occurred on the bottom of the No.12123 working face and the lower bottom pumping roadway of Panji No. 2 coal mine. The instantaneous maximum water inrush reached 14 000 m3/h, and the mine was partially flooded. Because there are lakes and multiple goafs above the working face, choose the ground-oriented horizontal drilling construction scheme, construct a horizontal horizontal plugging main hole on the ground to fill the sandstone aggregates at the water inrush point to complete the filling and form the roof cap. Then, through the main hole, the grouting station is filled with cement slurry to complete the plugging work of the collapse column, and four horizontal branch holes are constructed to explore the morphological characteristics of the collapse column. The results show that the water channel of the collapse column was successfully blocked and the water shutoff rate reached 100%. It shows the superiority of the ground-oriented horizontal drilling technology in the water inrush of the collapse column, and provides valuable experience for the treatment of similar water inrush accidents in the future.

国家重点研发计划资助项目(2017YFC0804100)；