The 1st- stage empty-field mining method should be applied to the steeply inclined medium-thick ore body and the inclined or gently inclined thick ore body; when the ore body thickness is greater than 50m , the longitudinal column of the room should be retained;
2 The steeply inclined ore body with stable ore should adopt segmental rock drilling and stage mining; for ore body with poor stability or inclination, segmental rock drilling and segmental mining should be adopted;
The height of the 3 sections shall be determined comprehensively according to the rock drilling depth of the rock drilling equipment and the inclination angle of the ore body;
4 The upper and lower adjacent stages of the same ore body and the ore and pillar arrangement of adjacent parallel ore bodies in the same stage shall have the same specifications, and the upper and lower sides and the front and rear shall correspond to each other;
5 Except for the roadway that is used for mining, transportation, filling and ventilation, other roadways shall not be dug in the top pillar of the stope .
2 The steeply inclined ore body with stable ore should adopt segmental rock drilling and stage mining; for ore body with poor stability or inclination, segmental rock drilling and segmental mining should be adopted;
The height of the 3 sections shall be determined comprehensively according to the rock drilling depth of the rock drilling equipment and the inclination angle of the ore body;
4 The upper and lower adjacent stages of the same ore body and the ore and pillar arrangement of adjacent parallel ore bodies in the same stage shall have the same specifications, and the upper and lower sides and the front and rear shall correspond to each other;
5 Except for the roadway that is used for mining, transportation, filling and ventilation, other roadways shall not be dug in the top pillar of the stope .
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