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矿山或其他土石方工程采用大爆破方法时,爆破区附近的地下建筑物(如隧道、巷道、涵洞、地下厂房、峒室库房等),必须确保其安全。因此,在爆破设计中应正确地评价爆破对其安全影响的程度。由于对爆破给予地下巷道(包括峒室)动载荷作用,及其造成破坏的规律认识不足,往往难于对安全距离作出正确估计。利用爆破安全规程规定的地震安全距离计算公式验算,往往过于保守,限制了爆破规模,以致不能采用更为合理的爆破方案。有时又
When large-scale blasting methods are used in mines or other earth-rock works, underground structures (such as tunnels, tunnels, culverts, underground buildings, galley houses, etc.) near the blasting area must be secured. Therefore, blasting design should correctly evaluate the extent of blasting on its safety. It is often difficult to make a correct estimate of the safety distance due to the lack of knowledge of the dynamic load applied to the underground tunnels (including the chimney chamber) during blasting and the law of its destruction. Making use of the formula for calculating the seismic safety distance prescribed in the blasting safety regulations is often too conservative and limits the scale of blasting so that a more reasonable blasting scheme can not be adopted. Sometimes again