建井技术
建井技術
건정기술
2014年
z1期
14-17
,共4页
瓦斯抽放%水平钻孔%孔壁稳定性%最优钻孔液压力%侧压力系数
瓦斯抽放%水平鑽孔%孔壁穩定性%最優鑽孔液壓力%側壓力繫數
와사추방%수평찬공%공벽은정성%최우찬공액압력%측압력계수
gas drainage%horizontal drilling%hole-wall stability%optimal drilling fluid pressure%lateral pressure coefficient
应用弹性理论，分析水平瓦斯抽放钻孔在原始地应力和钻孔液压力共同作用下钻孔孔壁应力场。以Coulomb强度准则和最大拉应力理论作为钻孔孔壁剪切破坏和张性破坏的判据，推导出不同侧压力系数条件下的水平瓦斯抽放钻孔孔壁坍塌压力和破裂压力计算公式。结合工程实例，提出适用于不同地层的水平瓦斯抽放钻孔最优钻孔液压力值确定方法，为水平瓦斯抽放钻进施工提供了更可靠、更实用的参考。
應用彈性理論，分析水平瓦斯抽放鑽孔在原始地應力和鑽孔液壓力共同作用下鑽孔孔壁應力場。以Coulomb彊度準則和最大拉應力理論作為鑽孔孔壁剪切破壞和張性破壞的判據，推導齣不同側壓力繫數條件下的水平瓦斯抽放鑽孔孔壁坍塌壓力和破裂壓力計算公式。結閤工程實例，提齣適用于不同地層的水平瓦斯抽放鑽孔最優鑽孔液壓力值確定方法，為水平瓦斯抽放鑽進施工提供瞭更可靠、更實用的參攷。
응용탄성이론，분석수평와사추방찬공재원시지응력화찬공액압력공동작용하찬공공벽응력장。이Coulomb강도준칙화최대랍응력이론작위찬공공벽전절파배화장성파배적판거，추도출불동측압력계수조건하적수평와사추방찬공공벽담탑압력화파렬압력계산공식。결합공정실례，제출괄용우불동지층적수평와사추방찬공최우찬공액압력치학정방법，위수평와사추방찬진시공제공료경가고、경실용적삼고。
Application of elastic theory analysis of horizontal gas drainage drilling in the original stress and drilling fluid under pressure from a common drill hole wall stress field. With coulomb strength criterion and the maximum normal stress theory as the drill hole wall shear failure and tensile crack criteria. Collapse pressure and fracture pressure calculation formula is derived under different lateral pressure coefficient. Combined with engineering examples are applicable to different strata proposed optimal drilling horizontal gas drainage drilling fluid pressure method. This method will be horizontal gas drainage drilling project to provide more reliable and more practical reference.
