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某矿創出一套減少穿孔机鑽具折断的經驗,保持了一年多沒有发生鑽具折断事故。现将該項经驗介紹如下: 1.穿孔机在岩浆浓度不正常的情况下操作,最易发生鑽具的折断。БС—1型穿孔机鑽具的重量;一般为2000公斤左右(有些矿山已增至2700公斤甚至3000公斤)这样重的鑽具,在不到一米高的地方,以自由落体运动降至孔底,冲击功有时将达到9400公斤·米,如果岩浆浓度过稀,鑽具上下运动不平稳,很容易造成鑽具的折断事故。根据实际經驗,我們采用的岩浆密度的数字,如表1所示:
A mine hit a set of experiences to reduce the breakage of drilling tools for piercing machines and kept the drilling tools from breaking off for more than a year. The experience is introduced as follows: 1. Puncher in the magma concentration is not normal operation, the most prone to drill break. БС-1 perforation drilling machine weight; usually about 2000 kg (some mines have been increased to 2700 kg or 3000 kg) such a heavy drill, less than a meter high places, free fall movement to the hole At the end, the impact power will sometimes reach 9,400 kg · m. If the magma concentration is too low, the up-and-down movement of the drilling tool is not stable and it is easy to cause the breaking of the drilling tool. According to actual experience, we use the number of magma density, as shown in Table 1: