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“三多爆破法”是多面临空地形爆破的最新发展。目前国内外还没有相应的爆破理论和设计方法。苏联仍采用单层一次爆破,超炸往往达到30～45％,有效抛掷率不高,边坡破坏严重。我国某些部门采用上层抛掷,下层松动,分层爆破,但最大抛掷率只能达到40％,设计方法均停滞在“断面——最小抵抗线折线图”的平面设计方法上,没有同时照顾数个临空面。美国则多用钻孔爆破,但由于重型机具甚多,在微地形变化甚大,波浪起袱的地貌条件下亦难使用。
“More than three blasting law” is the new face of more than the latest developments in terrain blasting. At present, there is no corresponding blasting theory and design method at home and abroad. The Soviet Union is still using a single-stage blasting, ultra-fried often reach 30 to 45%, the effective throw rate is not high, serious damage to the slope. Some departments in our country use the upper throw, the lower loosening, stratified blasting, but the maximum throw rate can only reach 40%, the design methods are stagnant in the “section - minimum resistance line chart” graphic design method, there is no simultaneous care number A temporary empty surface. The United States is more use of drilling blasting, but because of the large number of heavy machinery in the micro-topography changes greatly, the burden of the wave topography is also difficult to use conditions.