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结合深厚表土层立井冻结井壁融化阶段井壁破裂的具体位置,重点分析了温度差对井壁强度的影响,并建立了井壁结构破裂的力学机理和判断井壁破裂的经验公式,依据该经验公式提出了井壁破裂修复及预防措施。最后通过结合现场井壁修复实例,验证了该公式在类似矿井井壁结构破裂应用中的适用性。
Combined with the specific location of wellbore wall rupture in deep wellbore freezing shaft wall melting stage, the influence of temperature difference on wellbore strength is analyzed emphatically. The mechanical mechanism of wellbore wall structure rupture and the empirical formula for judging wall rupture are established. According to this The empirical formula proposed the wellbore rupture repair and preventive measures. Finally, by combining the example of repairing the borehole in the field, the applicability of the formula in the rupture of the shaft wall structure is verified.