摘要
以湖北云应盐矿水溶造腔现场先导试验为背景,在室内开展了小井间距双井水溶造腔模型试验研究,并压制出一种可用于模拟水溶造腔的大尺寸型盐。基于相似理论中的量纲分析法,建立了现场造腔与模型试验的相似比关系。研究结果表明:卤水平均浓度随造腔时间的增加而增大,并最终达到一个稳定的状态;在造腔速率上,试验1的提管方式要优于试验2,说明提进水管的方式更适合小井间距双井水溶造腔;试验1形成的腔体形状为"台阶状",可通过增加提管的次数来消除边界的不规则,小井间距双井水溶造腔的提管次数可借鉴单井水溶法,以8~10次较为合适,试验2形成的腔体形状为"宝塔状",此形状在空间利用上较差;小井间距双井水溶造腔形成的溶腔横截面为非对称的椭圆形,两组试验溶腔横截面的长短轴之比分别为1.44和1.17。
Based on the solution mining pilot test at field in Yunying salt mine,Hubei province,the two-well solution mining test with small well space was conducted,and a kind of large-size specimen was pressed. Relationship between solution mining at field and indoor was built based on the similar theory of dimensional analysis. The results showed that the average concentration of brine increased with the leaching time,and a steady state appeared at last.The pipe manner in test 1 has advantage on that in test 2 at leaching rate,that means raising injection pipe was fit for two-well solution mining. The shape of cavern in test 1 was sidestep shape,the irregularity boundary could be smoothed by increasing the number of raising pipe times,8 ~ 10 times of raising pipe was appropriate for two-well solution mining. The cavern shape in test 2 is pagoda shape,which is bad in space utilization. The cross section of caverns in these two tests is asymmetrical oval,the major to minor axis ratio was 1.44 and 1.77 respective.
出处
《地下空间与工程学报》
CSCD
北大核心
2017年第S1期155-161,169,共8页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金(51574048
51304256)
关键词
盐岩
地下储库
双井
模型试验
水溶造腔
salt rock
underground storage
two-well
model test
solution mining
