40m高钢筋混凝土水塔烟囱定向爆破

介绍了采用定向爆破法成功地拆除了复杂环境下40m高钢筋混凝土水塔烟囱的具体工程实例。通过对钢筋混凝土水塔烟囱的结构分析和各部分的重量计算,以及对铆固螺栓、内衬砖的受力分析和强度计算,初步探索出下部内衬拆除时防止上部内衬下落的方法,可供同类工程参考和借鉴。

Application of digital electronic detonator in blasting of an open pit mine

In the past, mines faced the problems of large specific charge, high boulder ratio, blasting vibration and high production cost in blasting. Therefore, this paper had investigated the application of digital electronic detonator in an open pit mine site, by taking the high-precision delay advantage of digital electronic detonator, the blasting parameters were adapted for blasting optimization test in actual situation. The comprehensive test indicated that the precise control were achieved through digital electronic detonator, the intelligent operation level on site were also enhanced. During the blasting process, there was no vibration experience on the site,the blasting vibration decreases by about 21%-29%,indicating that the blasting vibration was well controlled by the delicate design of the digital detonator;a small amount of boulders were produced, but the efficiency of excavation were not affected, showing that the blasting effect requirements were met; the blasting muckpiles were upheaved and at the rear there were the formation of obvious channels,blasting specific charge decreased by 11%-13%,cost reduction and efficiency increase were obvious. This paper had been based on the blasting application research of digital electronic detonator, in order to provide strong support for the promotion of subsequent digital electronic detonators, blast optimization design and the preparation of scientific construction organization design.