In order to improve the quality of broken rock blasting and reduce the cost of engineering blasting. In observational analyses,the loca-tion and the main reasons caused blasting boulder. This article produces the control measures to reduce the block rate,as strengthen geological logging,optimization of blasting parameters,charge structure,the regulatory blasting engineering operation,the blasting effect was improved. The experiences of the project provided some references for the future similar blasting projects.%为了提高岩石爆破的破碎质量，降低工程爆破成本，通过观察分析爆破大块出现部位和主要成因，提出了采取加强地质编录、优化爆破参数、改善装药结构、规范爆破操作的工程技术控制措施来降低大块率，爆破效果提高明显，可为类似工程提供科学依据。
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