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矿山井下用于安置设备的大断面硐室.其掘凿难度比巷道掘进要大得多,特别是在不稳定岩层中施工难度更大。然而,目前国外在断面为400m2的硐室掘凿方面已经取得了成功的经验。例如,苏联阿奇波尼金属矿联合公司设计院,为了开拓米尔盖尼姆萨斯克矿床的下部水平,提出了先掘帮、切顶,后掘凿中间岩柱的大断面硐室施工方案.在苏联“黄金矿井掘进托拉斯”得到使用。
The large section chamber used for the installation of equipment in the mine shaft is more difficult to excavate than the roadway excavation, especially in unstable rock formations. However, at present, successful experience has been obtained in the excavation of a chamber with a cross section of 400m2. For example, the Design Institute of the Federation of the United States Archieboni Metal Mine, in order to develop the lower level of the Mürgenimsk deposit, proposed a scheme of excavation of the large cross-section chamber with excavation, top cutting and post-excavation of the middle pillar. In the Soviet Union “Gold Mine Excavation Trust” is used.