顺层钻孔氮气排渣复合定向钻进试验研究
吴晋军^1，2，罗华贵¹，崔建峰³
（1.山西晋煤集团技术研究院有限责任公司，山西 晋城 048006；2.山西晋煤集团通风处，山西 晋城 048006；3. 山西长平煤业
有限责任公司，山西 高平 048400）
摘要：为解决松软破碎煤层顺层钻孔水排渣钻进工艺钻孔施工效率较低、深孔钻进困难等技术难题，在长平矿开展
了顺层钻孔氮气排渣复合定向钻进试验。介绍了氮气排渣复合定向钻进装备及工艺，对长平矿顺层钻孔氮气排渣复合定
向钻进试验进行了研究。该试验考察了在N₂基本相同压力时，N₂流量对钻孔钻进深度的影响。试验结果表明，N₂压力
0.958 MPa、流量18 000～18 200 m³/h 时， 钻孔最大孔深达到了3 06 m， 成孔深度200 m 以上钻孔的成孔率达到了81.8%。
关键词：松软破碎煤层；氮气排渣复合定向钻进工艺；N₂压力；N₂流量；成孔率
中图分类号：X37     文献标识码：A     文章编号：2095-0802-(2021)01-0146-02
Experimental Study on Compound Directional Drilling of Nitrogen Slag Removal in
Bedding Drilling
WU Jinjun^1,2, LUO Huagui¹, CUI Jianfeng³
(1. Technology Research Institute Co., Ltd., Jincheng Anthracite Mining Group of Shanxi, Jincheng 048006, Shanxi, China;
2. Ventilation Department, Jincheng Anthraciti Mining Group of Shanxi, Jincheng 048006, Shanxi, China; 3. Changping Coal
Industry Co., Ltd. of Shanxi, Gaoping 048400, Shanxi, China)
Abstract: In order to solve the technical problems of drilling technology of water slag removal in bedding drilling of soft broken
coal seams, such as low drilling efficiency and difficult deep hole drilling, the test of compound directional drilling of nitrogen slag
removal was carried out in Changping Coal Mine. This paper introduced the equipment and technology of compound directional
drilling of nitrogen slag removal, and studied the test of compound directional drilling of nitrogen slag removal in Changping Coal
Mine. The test investigated the influence of N2flow rate on drilling depth when N₂ pressure was basically the same. The test
results show that when the N₂ pressure reaches 0.95 MPa and the flow rate reaches 1 000～1 200 m³/h, the maximum hole depth
reaches 306 m, and the hole forming rate reaches 81.8% when the drilling depth is more than 200 m.
Key words: soft broken coal seam; compound directional drilling technology of nitrogen slag removal; N₂ pressure; N₂ flow; poreforming rate