Novel 90-m high-middle-section fan-shaped deep hole stoping method
The invention discloses a novel 90-m high-middle-section fan-shaped deep hole stoping method, and relates to the technical field of mining processes. The novel 90-m high-middle-section fan-shaped deep hole stoping method comprises the following steps: S1, rock drilling level stoping preparation is d...
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Format: | Patent |
Sprache: | chi ; eng |
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