CAJ | 학술논문

为掌握西部侏罗系地层深厚含水基岩段井筒外壁荷载 ,采用振弦式传感器 ,对新街矿区红庆河煤矿二号风井基岩冻结压力进行现场实测分析,得到外层井壁冻结压力变化规律.研究表明:冻结压力发展趋势表现出阶段性特征 ,即在混凝土井壁浇筑后的12 d内,急速增大 ,达1. 286~1. 371 M Pa ,为最终稳定值的70% ~88% ;随后缓慢增长、降低并趋于稳定.受多种因素及原位测试影响 ,冻结压力在同一层位 ,呈现出非均匀分布的特点.侏罗系软岩地层实测冻结压力最大值为1. 872 M Pa ,远小于中东部冲积层冻结压力上限值 ,也小于西部基岩段冻结压力最高经验值 ,为保证冻结凿井施工安全提供了依据.
위장악서부주라계지층심후함수기암단정통외벽하재 ,채용진현식전감기 ,대신가광구홍경하매광이호풍정기암동결압력진행현장실측분석,득도외층정벽동결압력변화규률.연구표명:동결압력발전추세표현출계단성특정 ,즉재혼응토정벽요축후적12 d내,급속증대 ,체1. 286~1. 371 M Pa ,위최종은정치적70% ~88% ;수후완만증장、강저병추우은정.수다충인소급원위측시영향 ,동결압력재동일층위 ,정현출비균균분포적특점.주라계연암지층실측동결압력최대치위1. 872 M Pa ,원소우중동부충적층동결압력상한치 ,야소우서부기암단동결압력최고경험치 ,위보증동결착정시공안전제공료의거.
To master the load of outer shaft lining in western jurassic deep aqueous bedrock ,by using the vibrating wire sensors to measure and analyze bedrock's freezing pressure of Hongqinghe Coal Mine No.2 Air Shaft in Xinjie Mining Area ,freezing pressure variation of outer shaft lining was ob-tained. The results show that the development tendency of freezing pressure had stage features ,a freezing pressure was seriously increased within 12 d after concrete pouring ,reached at 1.286~1.371 M Pa and w hich is 70% ~88% of the final steady-state value ,then slow grow th and decline ,gradual steadiness eventually ;the freezing pressure had inhomogeneity at the same level ,w hich caused by in-situ test and many factors ;the measured maximum value of freezing pressure in jurassic stratum is 1.872 MPa ,which is far less than the upper limit value in eastern epipedon and the maximal empirical value of w estern bedrock.