冻土层条件下探槽爆破施工技术

Technology of Exploration Ditch Blasting Beneath Frozen Ground

介绍了季节性冻土的爆破类型、特点及破碎机理。通过对黑龙江省宝兴沟矿区冻土层下球状药包爆破工艺研究,成功解决了冻土层中探槽爆破施工难题。实践表明,只要根据当地气候、土质等实际情况合理选定爆破参数和技术经济指标,就可以有效控制爆破飞石,降低成本,提高施工效率,取得良好的爆破效果。给出了技术参数和参数指标,可为同类型探槽爆破施工提供参考。

The paper introduces the blasting types,characteristics and fracturing mechanism in seasonal frozen soil. By the study on blastin technology of spherical charge beneath frozen ground in Baoxinggou mining area of Heilongjiang,the construction difficulties in exploration ditch of frozen ground are successfully solved. The practice shows that blasting flyrock can be effectively controlled by rational blasting parameters and economic and technical indexes selected on basis of the actual situation of the local climate and soil to lower the construction cost and improve the construction efficiency. The paper presents the technical parameters and parameter indexes which can be reference to the similar exploration ditch blasting construction.