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blasting energy
    The technology of large hole spacing and small burden is experienced for borehole blasting, which is augmenting the space between the holes and reducing the space between the rows. The blasting energy is reasonably distributed, and the power rate is reduced accordingly.
    大孔距小抵抗线爆破技术是比较成熟的深孔爆破技术,它是适当增大孔间距减少排间距以使爆破能量得以合理分布,爆炸能量的做功范围将相应增大,周边区域内单位体积所获的动能必然降低,由于补充破碎能量的减少,粉矿率也将相应减少。
    Large holespacing and small burden blast can enlarge the angle of crater,produce an arc free face beneficial to the intensification of reflecting tensile stress and the distribution of volocity field,anhance the utilization of blasting energy and improve blast efficiency,the parameters of hole patterm are better to be defermined by the test of double hole explosion crater and in light of the principle of free face with equal resistance.
    大孔距小抵抗线爆破使爆破漏斗角增大,产生有利于反射拉应力增强及速度场分布的弧形自由面,爆炸能量利用率高,爆破效果好。 其孔网参数宜采用双孔爆破漏斗试验,根据等阻力自由面原理确定。
    Deep hole bench blasting method adopts largely spaced holes to bring explosives blasting energy into full play, to increase breaking rate and to reduce the number of large size blocks, thus to produce desirable rockfill materials.
    深孔梯段爆破采用大孔距布孔方式,使炸药爆炸能量得以充分发挥,破碎率提高,大块度降低,从而获得较理想的堆石坝石料。
    Applying elastic theory and fluctuating theory, the article deduces the shock pressure on the rock of hole wall in case of normal incidence, and compares it with the hole wall pressure in air-uncoupling charge blasting with the same charge and rock property . The result shows that the water-couple charge in the hole can significantly increase the utilization ratio of blasting energy and strengthen the capability of crushing rock than air-uncouple charge.
    应用弹性理论和波动理论推导出了正入射情况下孔壁岩面上的冲击压力,并与同样装药和岩石条件下空气不耦合装药爆破时的孔壁压力进行了比较,结果证明:炮孔水耦合装药比空气不耦合装药爆更能提高爆炸能量利用率,增强破岩能力。
    The results show that there is a critical value in the rate constants,and that the blasting energy can be used efficiently only if the rate constant is larger than the critical value.
    结果表明,反应速率常数存在阈值,只有反应速率足够大,才能充分利用爆炸能量
    It comes to the conclusion that as for the slope wall bank, the inclined hole blasting has advantages over the straight hole blasting in high utilization rate of explosive blasting energy and good blasting effect, and it is an effective measure to increase the explosive blasting potential.
    并得出初步结论:对于坡面台阶采用斜孔爆破比直孔爆破的炸药爆炸能量利用率高、爆破效果好,是提高炸药爆破潜能的有效措施。
 

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