CAJ | 학술논문

高家堡煤矿风井深820m ，穿越厚度达380m的高水压、大流速深厚富水软岩含水层，最大涌水量达2219.63m3／h ，采用冻结法施工。为了确保冻结封水效果，采用一次冻全深方案，并采用“三大一小”施工方式，即大直径冻结管、大盐水泵、大装机制冷量、小开孔间距。冻结孔采用外、内圈孔插花加防片帮孔的布置方式。冻结初期，快速降低盐水温度，实现了冻结壁早交圈，井筒早开挖。利用部分冻结孔，对深厚含水层裂隙进行注浆充填加固，减小地下水流速，保证了冻结效果。该井筒冻结施工所取得的成功经验，可为西部富水软岩地层冻结法凿井设计和施工提供借鉴。
고가보매광풍정심820m ，천월후도체380m적고수압、대류속심후부수연암함수층，최대용수량체2219.63m3／h ，채용동결법시공。위료학보동결봉수효과，채용일차동전심방안，병채용“삼대일소”시공방식，즉대직경동결관、대염수빙、대장궤제랭량、소개공간거。동결공채용외、내권공삽화가방편방공적포치방식。동결초기，쾌속강저염수온도，실현료동결벽조교권，정통조개알。이용부분동결공，대심후함수층렬극진행주장충전가고，감소지하수류속，보증료동결효과。해정통동결시공소취득적성공경험，가위서부부수연암지층동결법착정설계화시공제공차감。
A mine ventilation shaft in Gaojiapu Mine had a depth of 820m ,was passed through a deep and 380m thick watery soft rock aquifer with high water pressure and high flow rate ,a max inflow in the shaft was 2 219.63m3/h and was constructed with a ground freezing method.In order to ensure a freezing water sealing effect ,a full depth freezing plan was applied and a “three large and one small”construction method was applied. The construction method was applied with a large diameter freezing tube ,large brine pump ,large unit refrigerating capacity and small space between the boreholes.A scat‐ter and spalling prevention pattern method was applied to the external and internal ring of the freezing boreholes. At a freezing initial period ,a rapid reduction of the brine temperature was conducted and an early cryosphere of the freezing wall could be realized in order to have an early excavation of the mine shaft. Partial freezing boreholes were applied to the grouting and backfill reinforcement of the cracks in the deep and thick aquifer in order to reduce the flow rate of the underground water and to ensure the freezing effect. The successful experiences obtained from the mine freezing shaft construction would provide the references to the design and construction of the mine freezing shaft sinking in the watery soft rock strata in Western China.