以3 kg 2，4，6-三硝基甲苯（TNT）炸药在内径和深度均为11 m的内衬钢筒混凝土围堰爆炸水井中的爆炸为研究对象，数值模拟研究了筒壁厚度、混凝土围堰厚度对钢筒受力与变形的影响，以及水井内设置气泡帷幕对提高设施安全性等爆炸水井设计中关注的几个动力学问题。结果表明：水井内水中爆炸冲击波参数与P. Cole公式计算结果基本吻合；钢筒内壁不利的受力与形变部位都出现在装药中心水平线以下的筒体部位，直到壁厚达到50 mm时距筒底1.60 m处等效塑性应变仍可达到0.001 6，不满足强度理论判断条件；取钢筒厚度为20 mm，外加0.5 m厚混凝土围堰时，内衬钢筒爆炸水井符合安全性强度设计要求；在水井底部设置半径为4.9 m、厚度为0.05 m气泡帷幕时，可使筒壁处的冲击波压力峰值降低40.6 %；对于壁厚为20 mm的钢筒，采用气泡帷幕衰减冲击波措施时，混凝土围堰厚度达到0.35 m就能满足安全性设计要求。上述结论可为内衬钢筒爆炸水井结构设计和安全性评估提供方法及依据。

Taking 3 kg 2, 4, 6-trinitrotoluene (TNT) explosive exploding in the explosion water-well with steel-linner with internal diameter and depth both of 11 m as the research object, based on numerical simulation, several concerned dynamics problems in the design of explosion well, such as the influence of thickness of the steel-inner and concrete cofferdam thickness to the force and deformation of the steel, setting the bubble curtain in the well to improve the facilities security and so on, are studied. The results show that the underwater explosion shock wave parameters in the well are consistent with the result of the calculation by P. Cole formula. The biggest force and deformation of the inner wall of the steel-inner appears below the horizontal line of the center of the charge, when the thickness of steel-inner reaches 50 mm. The equivalent plastic strain where is 1.6 m far away from the bottom of steel-inner can attain 0.16 %, but this does not meet the conditions of the strength theory. When the thickness of steel lining is 20 mm, plussing 0.5 m thick concrete cofferdam,the explosion well with steel-inner meets the requirements of safety design. Setting a bubble curtain, the radius of which is 4.9 m and the thickness is 0.05 m, can make the peak pressure of the shock wave near the steel wall be decreased by 40.6 %. When the thickness of the steel-inner is 20 mm and the thickness of concrete cofferdam is over 0.35 m, it will be able to meet the requirements of the security design by taking the bubble curtain method to attenuate the shock wave. The conclusions above can offer the method and the basis for the structural design of the explosion well with steel-inner and safety assessment.