凤凰矶石厂大跨度溶洞顶部爆破拆除

Blasting demolition of the top of a large-span karst cave in the Fenghuang rock factory

大跨度溶洞爆破在我国工程爆破中很少遇到,其爆破难度大,施工复杂且存在一定的安全隐患。以凤凰矶石厂大跨度溶洞顶部爆破拆除为例,进行数值模拟稳定性分析,采用微差爆破施工方案,确定爆破参数后对爆破方案进行爆破数值模拟计算,并将爆破后的实际情况与爆破数值模拟结果进行对比,经实践,爆破设计方案可行。

The blasting of large-span karst cave is rarely implemented in engineering blasting in China.Because the blasting is difficult,the construction is complex and dangerous.Taking the demolition blasting of the top of large-span karst cave in Fenghuang rock factory as an example,the stability analysis of numerical simulation is carried out.The millisecond blasting construction scheme is adopted,and the blasting numerical simulation calculation is carried out after determining the blasting parameters.The actual results after blasting is compared with the blasting numerical simulation results.The practice shows that the blasting design scheme is feasible.