论文部分内容阅读
为实现硫化矿床的安全开采,采用室内测试与数值模拟相结合的方法,预测某高硫矿山矿体爆破作业过程中发生炸药自爆的危险性。用作者设计的炸药自爆模拟装置,选取具有代表性的矿样与矿山常用炸药进行爆燃点测定。建立爆破区域硫化矿自热温度场的数学模型。结合现场边界条件,运用数值分析软件进行仿真模拟。研究结果表明,炸药的爆燃点与炸药种类及矿样的含水率均存在很大关系,不同试样的爆燃点温度均高于230℃,发生爆燃时的环境温度在210℃以上;在第80天时,爆破区域内的最高温度达到189.9℃,低于炸药爆燃需要的环境温度。因此,在该时间段内完成矿体的爆破作业,能有效预防炸药自爆事故。
In order to realize the safe mining of sulphide ore deposit, indoor testing and numerical simulation are combined to predict the danger of explosive detonation during the blasting operation of a high-sulfur ore body. With the explosives detonation simulation device designed by the author, the representative explosives are selected for the deflagration point determination. Establishing Mathematical Model of Self - heating Temperature Field of Sulfide Mine in Blasting Area. Combining with the scene boundary conditions, numerical simulation software was used to simulate. The results show that explosive detonation point is closely related to the types of explosives and the water content of the ore samples. The detonation temperature of different samples is higher than 230 ℃, and the ambient temperature of deflagration is above 210 ℃. In the 80th Day, the maximum temperature in the blasting area reaches 189.9 ℃, which is lower than the ambient temperature required for the deflagration of explosives. Therefore, in this period of time to complete the demolition blasting operations, explosives can effectively prevent accidents.