This paper introduces controlled blasting technology on signal chamber of pit-bottom and main haulage roadway, which are of complex condition, lithological character and highly security.
介绍了采用控制爆破技术施工位于井底车场及主要运输大巷的信集闭峒室，条件复杂，岩性变化大，要求安全性高。
The excavation technology and design parameters of a polit chamber blasting of underground drainage system in Xiaowan power station are introduced.
介绍了小湾电站右岸地下排水系统的小洞室开挖爆破技术和设计参数。
The selection of open chamber blasting parameters in our mine has been introduced for communion and improving the technology of open chamber blasting.
通过对本矿露天矿山硐室爆破参数选择介绍，达到相互交流，进一步提高露天硐室爆破技术的目的。
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