长距离定向近水平顺层分支钻孔注浆堵水技术研究

华北地区浅部煤炭资源的开采进入末期,越来越多的矿井进入深部开采,深部开采面临的高水压、高地温、高地应力等地质灾害,且浅部开采中的治理方法措施对于深部开采并不适用。邯邢地区随着采深的增大,煤层底板受高承压的奥陶系灰岩水的威胁日趋严重,以冀中股份邢东矿为例,该矿采深达1 000 m以深,生产区域受奥陶系灰岩承压水威胁且奥陶系灰岩裂隙、构造发育,传统地面注浆治理方法直孔段工程量大、效率低、费用高,跟不上工作面生产接替;井下注浆治理又面临超高底板水压控制问题,安全风险大。因此,有必要采用新的技术手段,本文致力于长距离定向近水平顺层分支钻孔进行注浆堵水技术工艺研究,提高探查效率,降低探查治理费用。

Study on grouting and water blocking technology for long distance oriented nearly horizontal bedding

The mining of shallow coal resources in North China entered the final stage. More and more mines entered deep mining. The high water pressure, high ground temperature, high ground stress and other geological disasters faced by deep mining were serious, and the treatment methods in shallow mining were taken, but not suitable for deep mining. With the increase of deep mining in the Hanxing area, the threat of high-pressure Ordovician limestone water in the coal seam floor was becoming more and more serious. Xingdong Mine was taken as an example. The mining depth was 1 000 m deep. It was threatened by the Ordovician limestone confined water and the Ordovician limestone fissures and tectonic development. The traditional ground grouting treatment method had large amount of engineering, low efficiency and high cost, which could not keep up with the production of the working face;The slurry treatment was faced with the problem of ultra-high floor water pressure control and had a high safety risk. Therefore, it was necessary to adopt new technical means. Long-distance oriented near-horizontal bedding branch drilling was adopted to carry out grouting and water blocking technology research,improve exploration efficiency and reduce exploration and management costs.