采矿与安全工程学报
採礦與安全工程學報
채광여안전공정학보
JOURNAL OF MINING AND SAFETY ENGINEERING
2014年
6期
976-981
,共6页
裂隙岩体%渗流地层%人工冻结壁%冻结温度场%交圈时间
裂隙巖體%滲流地層%人工凍結壁%凍結溫度場%交圈時間
렬극암체%삼류지층%인공동결벽%동결온도장%교권시간
fractured rock mass%seepage strata%artificial freezing wall%freezing temperature field%closure time
建立了渗流作用下裂隙岩体双孔冻结的数值计算模型，采用 COMSOL 软件模拟分析了不同裂隙开度、裂隙倾角及渗流速度对裂隙岩体人工冻结壁发育规律的影响。结果表明：1)裂隙开度愈大，冻结壁交圈时间愈长，且增幅愈大；无论是主面冻结壁还是界面冻结壁，上游冻结壁发展速度明显小于下游冻结壁发展速度；2)裂隙倾角为0°的冻结区域和等温线均是关于y轴对称，10°，20°，30°的冻结温度场分布已不再关于y轴对称，并且沿裂隙方向形成“心形”，即在下游裂隙方向上冻结壁是最厚的，而在上游沿着裂隙方向冻结壁是最薄的，随着裂隙倾角的增大，水渗流对冻结温度场的影响逐渐减小；在文中给定条件下，裂隙开度比裂隙倾角对渗流地层冻结壁发育的影响程度较大。
建立瞭滲流作用下裂隙巖體雙孔凍結的數值計算模型，採用 COMSOL 軟件模擬分析瞭不同裂隙開度、裂隙傾角及滲流速度對裂隙巖體人工凍結壁髮育規律的影響。結果錶明：1)裂隙開度愈大，凍結壁交圈時間愈長，且增幅愈大；無論是主麵凍結壁還是界麵凍結壁，上遊凍結壁髮展速度明顯小于下遊凍結壁髮展速度；2)裂隙傾角為0°的凍結區域和等溫線均是關于y軸對稱，10°，20°，30°的凍結溫度場分佈已不再關于y軸對稱，併且沿裂隙方嚮形成“心形”，即在下遊裂隙方嚮上凍結壁是最厚的，而在上遊沿著裂隙方嚮凍結壁是最薄的，隨著裂隙傾角的增大，水滲流對凍結溫度場的影響逐漸減小；在文中給定條件下，裂隙開度比裂隙傾角對滲流地層凍結壁髮育的影響程度較大。
건립료삼류작용하렬극암체쌍공동결적수치계산모형，채용 COMSOL 연건모의분석료불동렬극개도、렬극경각급삼류속도대렬극암체인공동결벽발육규률적영향。결과표명：1)렬극개도유대，동결벽교권시간유장，차증폭유대；무론시주면동결벽환시계면동결벽，상유동결벽발전속도명현소우하유동결벽발전속도；2)렬극경각위0°적동결구역화등온선균시관우y축대칭，10°，20°，30°적동결온도장분포이불재관우y축대칭，병차연렬극방향형성“심형”，즉재하유렬극방향상동결벽시최후적，이재상유연착렬극방향동결벽시최박적，수착렬극경각적증대，수삼류대동결온도장적영향축점감소；재문중급정조건하，렬극개도비렬극경각대삼류지층동결벽발육적영향정도교대。
A numerical calculation model of fractured rock mass frozen with double hollows under the function of seepage has been set up,and the influence of the fracture aperture, the fracture inclination and the influence of the seepage velocity on the development of artificial freezing wall in seepage strata with fractured structure have been analyzed using the COMSOL Multiphysics finite-element analysis software.The results show that:1) The larger the fracture aperture is, the longer the freezing wall clo-sure time becomes and the larger the increase;both in the main section and the interface of frozen wall, the upstream speed of development in the frozen wall is significantly less than that of the downstream speed of development;2) The freezing zone and isotherms of fracture angle of 0 °are symmetric about the y-axis, and the distribution of freezing temperature field for 10 °, 20 ° and 30 ° is no longer symme-trical about the y-axis, and the isotherms outside the frozen wall show“heart-shaped”distribution along the fracture inclination, ie the thickness of the frozen wall is the thickest in the downstream direction while the thinnest in the upstream direction along the fracture inclination. The influence of water see-page on the freezing temperature field distribution decreases gradually as the fracture angle increases. Under the given conditions in this paper, the seepage velocity is the main factor which influences on the frozen wall development, followed by fracture aperture and the fracture inclination.
