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东西关水电站闸坝及厂房基础开挖施工工期短，强度高，难度大，特别是工程建基面是在泥质砂岩和砂质粘土岩层上，因此对施工组织设计、钻爆工艺选择、开挖后对建基面岩石的保护等提出了很高的要求。针对施工特点，采取“主攻闸坝、拼抢厂房、全面完成施工”的原则进行施工组织，并在施工中采取预裂爆破、深孔微差爆破、柔性垫层爆破等工艺，保证了施工的顺利进行，取得了较显著的成果。
Due to the short construction period, high strength and great difficulty in the foundation excavation of the dam of Dongxiguan Hydropower Station and the foundation of the plant, in particular, the foundation surface of the project is on shaly sandstone and sandy clay rock formation. Therefore, the selection of construction design, drilling and blasting technology, After digging the protection of the rock on the surface of the proposed high requirements. According to the characteristics of the construction, adopt the principle of “main gate dam, scraping the factory building and completing the construction in an all-round way” to carry out the construction and organization and adopt pre-cracking blasting, deep-hole differential blasting and flexible cushion blasting to ensure the smooth construction Conducted, achieved more significant results.