西部地区钻井法凿井新型马头门力学特性研究

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中图分类号：TD264.2 文献标志码：A 文章编号：1672-1098（2025）01-0083-09

Abstract：Objective In order to solvethe problem that thedrilling well wallconnected to the lining is easy to produce damage sincethe deep shaft ingate，constructedby using drilling methods in the western region，is located in the Jurassiccoal bearing strata with soft lithology，lowstrength，and poorsurrounding rock stability.Methods A newstructural form of drilling wellbore horsehead gate was proposed，inwhichthe asphalt product panels wereused tochange the driling well wall and horsehead gate lining from arigid connection to a weak connection.Thelarge calculation software was used to analyze and compare the displacement and stress distribution characteristics of the new horsehead gate structureand the conventional horsehead gate structure，and to compare the support ffect of different thicknesses of asphalt panels.Results The numerical simulation results revealed the stress deformation mechanism of the new type of ingate structure，Compared with conventional structures，the first principal stress and vertical deformation in the shaft structure had decreased by 67.30% and 18.51% ，indicating that the stress state of the structure was more reasonable when the thickness of the asphalt product board was between 8mm and 14mm.Conclusion After adopting the new structure，the asphalt product plate plays a good role in deformation and pressureregulation，which effectively improves the stress condition of the well wall at theconnection.The research results provide reference for the design and construction of ingate under special geological conditions.

Key words：shaft driling;weak-cemented soft rock ;deep shaft ingate;new structure;numerical simulation

钻井法凿井马头门施工是在井筒钻进到底、悬浮下沉井壁、壁后充填固井、排水等工艺后，将井壁中预留钢筋与马头门衬砌钢筋焊接在一起[1]，形成整体受力结构。（剩余8252字）