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随着地下矿山生产的发展,爆破规模也越来越大,一次爆破药量可达200~300吨。炸药量的增加,爆破次数的频繁,由此而产生的爆破地震效应对地下构筑物,如:采场底柱、底柱中的巷道以及临近震源的其他井巷工程的破坏作用愈来愈显得严重。因此,日益引起人们对这一问题的重视。目前对爆破地震安全范围的计算,还停留在经验公式的阶段,广泛采用的公式是:
With the development of underground mine production, the scale of blasting is also getting bigger and bigger, and the quantity of blasting once can reach 200-300 tons. Explosive quantity increases, the frequency of blasting frequent, resulting in blasting seismic effects on the underground structures, such as: stope bottom column, the bottom of the roadway and adjacent to the source of other roadway engineering damage more and more serious . Therefore, people pay more and more attention to this issue. At present, the calculation of the safety range of blasting earthquakes still stays at the stage of empirical formula. The widely adopted formula is: