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CALCULATING METHOD FOR BORE-HOLE LENGTH, BORE-HOLE DIAMETER AND BLASTING FACTOR IN BORE-HOLE BLASTING

机译：孔眼爆破中孔眼长，孔眼直径及爆破系数的计算方法

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摘要

PURPOSE: To perform a safety, efficient blasting work without a stone flying accident by a method wherein a bore-hole length is calculated by substituting optionally pre-selected figures of bore-hole diameter, minimum resistant line length, and blasting factor into a specified equation. ;CONSTITUTION: An unknown minimum resistance line length W is expressed by the following equation: W=(-(πd²/4)+((πd²/4)²+πd²CH²)^1/2)/2CH, where H is bore-hole length, d is bore-hole diameter, and C is blasting factor and they are optionally-selected figures. The equation is changed to 2CHW =-(πd²/4)+-((πd²/4)²+πd²CH²)^1/2, further to H=Wπd²/πd-4CW²)(4C²W²-θd²C) H²+-CWθd²H=0 and then to H((4C²W²-πd²C)H+CWπd²=0. When H=0, the equation is changed to (4C²W²C)H=-CWπd², and this equation is changed to HWπd²/(πd²-4CW²). The bore-hole length H can be quickly, accurately calculated by using this equation and a bore-hole blasting work can be performed without a stone flying accident.;COPYRIGHT: (C)1995,JPO

机译：用途：为了进行安全，有效的爆破工作，而不会发生石方飞扬事故，该方法通过将可选的钻孔直径，最小阻力线长度和爆破系数替换为指定值来计算钻孔长度方程。 ;构成：未知最小电阻线长W由以下公式表示：W =（-（πd^{2 / 4）+（（πd^{2 / 4）< Sup> 2 +πd^{2 CH ^{2 ）^{1/2 ）/ 2CH，其中H为钻孔长度，d是钻孔直径，C是爆破系数，它们是可选的数字。该公式变为2CHW =-（πd^{2 / 4）+-（（πd^{2 / 4）^{2 +πd^{2 CH ^{2 ）^{1/2 ，进一步达到H =Wπd^{2 /πd-4CW^{2 ）（4C ^{2 W ^{2 -θd^{2 C）H ^{2 +-CWθd^{2 < / Sup> H = 0，然后到H（（4C ^{2 W ^{2 -πd^{2 C）H +CWπd^{2 < / Sup> = 0。当H = 0时，方程变为（4C ^{2 W ^{2 C）H =-CWπd^{2 ，将该等式更改为HWπd^{2 /（πd^{2 -4CW ^{2 ），可以快速，准确地计算出孔长H通过使用该方程式，可以在不发生飞石事故的情况下进行钻孔爆破工作。;版权所有：（C）1995，日本特许厅}}}}}}}}}}}}}}}}}}}}}}}}}}}}

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公开/公告号JPH0712500A

专利类型
公开/公告日1995-01-17

原文格式PDF
申请/专利权人 NAKAJIMA YASUJI;
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申请/专利号JP19930180633
发明设计人 NAKAJIMA YASUJI;
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申请日1993-06-25
分类号F42D1/00;
国家 JP
入库时间 2022-08-22 04:26:42

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