松软含硫化铁结核煤层成孔问题研究

发布时间：2018-03-07 00:30

本文选题：硫化铁结核　切入点：松软煤层　出处：《煤矿安全》2017年11期 　论文类型：期刊论文

【摘要】：针对松软含硫化铁结核煤层在顺层钻孔施工存在的塌孔、卡钻、成孔深度浅等问题,提出深槽螺旋复合钻进技术,开发出相应钻具组合,并通过在实践中的不断试验,对钻具进行了优化改进。研究结果表明,在松软含硫化铁结核地层中钻进,原来一直认为硫化铁结核是影响钻进成孔的决定性因素的这一观点存在认识上的误区,真正起决定性作用的是硫化铁结核影响下的孔壁的稳定性;深槽宽翼片螺旋复合钻进技术在松软含硫化铁结核煤层中成孔率高,有其独特优势。
[Abstract]:Aiming at the problems of hole collapse, drilling jam and shallow hole forming depth in soft iron-sulfide nodule coal seam construction, this paper puts forward the technology of deep groove helical composite drilling, develops the corresponding drilling tool combination, and through the continuous test in practice, puts forward the technology of deep groove helical composite drilling. The optimum improvement of drilling tools has been carried out. The research results show that there is a misunderstanding in the view that iron sulfide nodules are the decisive factors affecting drilling hole formation in soft iron-sulfide nodule formation. The stability of the hole wall under the influence of iron sulfide nodules is really decisive, and the deep groove wide wing helical composite drilling technology has its unique advantages because of its high pore formation rate in soft iron sulfide nodules coal seams.
【作者单位】：中煤科工集团西安研究院有限公司;
【基金】：山西省煤基重点科技攻关资助项目(Q2014-07)
【分类号】：TD712.6

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