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Experimental and analytical studies to substantiate the blasting operations rational parameters in the hard media destruction

机译：通过实验和分析研究证实硬介质破坏中的爆破操作合理参数

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The method of sieve analysis studied particle size distribution of the products explosive destruction of sand-cement models with elliptical compensatory cavity in its middle that were destroyed with use of various designs explosive charges and built the cumulative distribution curves. It was established that the area of the newly formed surface of these models destruction products, destroyed by an explosion of variable cross section charges, increased 1.45 times as compared with charges of other structures (boiler in the extension of the charge end, solid structure). The middle diameter of particles increased at 50-60 %. According to the results of the fractional composition, distribution of the products models destruction for different designs and geometric parameters of the compensation cavity has been defined by the regression lines. According to the cumulative distribution curves of the products of destruction of a model with different geometrical parameters of the compensation cavity, around which various designs of explosive charges were exploded, the equations of the regression lines was determined. Based on the obtained dependences of the regression-correlation analysis, mathematical models have been developed to optimize the choice of rational parameters of compensation cavities and explosive charge structures. Recommendations for their use in mines are given.
机译：筛分分析法研究了采用椭圆形补偿腔的砂水泥模型在不同设计炸药的作用下被炸毁的产物的粒度分布，建立了累积分布曲线。可以确定的是，这些模型破坏产品的新形成表面的面积（由可变截面装药的爆炸所破坏）比其他结构的装料（装料端延伸的锅炉，实心结构）增加了1.45倍。 。颗粒的中径增加了50-60％。根据分数组成的结果，通过回归线定义了针对不同设计和补偿腔几何参数的产品模型破坏分布。根据补偿腔几何参数不同的模型破坏产物的累积分布曲线，围绕爆炸模型设计各种炸药，确定了回归线方程。基于获得的回归相关分析的依赖性，开发了数学模型以优化补偿腔和炸药结构的合理参数的选择。给出了在矿山中使用的建议。

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