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金桥煤矿表土层埋深３８３－１ｍ ，是国内目前冻结凿井表土层最厚的井筒，且地层含砂礓较多，深部有多层强膨胀性厚粘土层。通过采用靶域定向钻进技术，使全部冻结孔都钻入设计靶域，为后续冻结工程的顺利实施创造了有利条件；为今后深表土地下工程中的定向钻孔工程施工积累了新的经验。
The topsoil of Jinqiao Mine is 383-1m in depth, which is the thickest wellbore in the topsoil that is currently frozen in China. There are many sand-bearing formations in the formations, and thick clay layers with multiple layers of strong expansions in depth. Through the use of target-area directional drilling technology, all the frozen holes are drilled into the design target area, which has created favorable conditions for the smooth implementation of the subsequent freezing project; thus, new directional drilling projects have been accumulated in the deep subterranean engineering experience.