提高低渗透铀矿床地浸采铀钻孔涌水量的成井工艺研究

Study on Improving Borehole Water Inflow at Low-Permeable Uranium Deposits

钻孔涌水量是评价地浸采铀钻孔质量的关键。在地浸采铀成井施工中,采用合理有效的成井工艺,对提高和稳定钻孔的抽注液能力具有非常重要的意义。在通辽铀矿床地浸采铀钻孔成井施工经验的基础上,作者对低渗透矿床矿层泥浆比重设计、矿层部位局部扩孔、空压机洗井参数设计三个施工关键工艺进行了研究。

Borehole water-inflow is the key to evaluate the drilling quality of in-situ leaching of uranium. Low-permeable deposits need small inj ection volume for uranium mining hole.In well construction of in-si-tu leaching of uranium,rational and effective well drilling technology to improve and stabilize the borehole pump priming ability plays a very important role.Based on the drilling experience in well construction technologies of in-situ leaching uranium in Tong Liao,we study three key construction technologies of low-permeable deposits,including mud design,local seam reaming and flushing parameters by air compressor.