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随着露天大区微差爆破规模的不断扩大,采用混药车混合炸药直接向炮孔中装入浆状或乳化炸药的装药方法也日益增加。目前,混药车混合的乳化炸药,出口处药温达72～76℃,因此对起爆器材的耐高温性能提出了新的要求。预装药的持续时间有的长达7～15昼夜。然而,按GB6722～86《爆破安全规程》的规定,在高温矿井爆破,孔底温度为60～80℃时,炸药应用沥青牛皮纸包装完好,不得与孔壁接触,向孔内装药至起爆时间不应超过1小时。据测定,用混药车直接装填的乳化炸药,药温高达70℃以上,
With the continuous expansion of the micro-scale blasting in the open-air area, the method of charging slurry or emulsion explosives directly into the blast hole by using the mixed-drug mixed explosives is also increasing. At present, the mixing emulsion emulsion explosives, the drug outlet temperature of 72 ~ 76 ℃, so the high temperature performance of the detonating equipment put forward new requirements. Some of the duration of pre-loaded as long as 7 to 15 days and nights. However, according to GB6722 ~ 86 “blasting safety regulations”, blasting in high temperature mine, the hole bottom temperature is 60 ~ 80 ℃, the explosive kraft paper packaging intact shall not be in contact with the hole wall, to the hole charge to the initiation time is not Should be more than 1 hour. According to the determination, with a mixture of direct injection of emulsion explosives, drug temperature up to 70 ℃ or more,