The section mining stage mining method and mining roadway include: stage transportation roadway, district rock drilling roadway, pedestrian ventilation patio, mine discharge well, electric ramp, funnel neck and so on. 1) Stage Transportation Roadway - The location of the stage transportation lane is determined according to the layout of the transportation lanes throughout the stage. Generally arranged along the contact line of the lower part of the ore body. 2) Ventilation Pedestrian Patio - Most of the ventilated pedestrian patios are arranged in the columns, and the broken stones can be 1.6 x 2.2 m2 . It is required that wherever there is a work of people, fresh air should be sent. 3) Electric roadway - by the pedestrians into the eaves. The section of the electric roadway can be 2.2 to 2.2 m 2 or 2.5 x 2.5. 4) Yanjing Mine – Digger mines are drilled from the side of the transport roadway to the electric ramp. The broken rock can be 2 × 2 m 2 , (the ratio of the Gongchangling mine, some of the upper opening slightly) should pay attention to the positional relationship of the wellhead in the ramp. Do not face the bucket at the top of the mine. It should be staggered more than 2.0 meters. 5) Sectional rock drilling roadway 1 Segmented rock drilling roadway by the tunnel. 2 Sectional roadway section is determined by the selected rock drilling equipment. If YG-80 is used, the section can be 2.8 × 2.8 m 2 . 3 Arrangement of section roadway - it is arranged according to the needs of rock drilling and breaking work, and it is closely related to the mining work. 4 The number and location of section roadways shall depend on the thickness of the ore body, the needs of the prospecting project, the nature of the contact between the ore body and the surrounding rock, and the stability of the surrounding rock. Each section can be arranged with 1 or 2 sectioned lanes, usually arranged by the lower disc to reduce the depth of the blasthole and improve the rock drilling efficiency. (See Figure A) When the contact zone between the lower part of the ore body and the surrounding rock is not stable enough, the surrounding rock and the ore body are not easy to be separated, and the prospecting roadway needs to be arranged along the upper plate of the ore. (See Figure B) When the thickness of the ore body is large, the section roadway can be placed in the center of the ore body and rock is drilled on both sides (see Figure C). When the shape of the ore body is complicated and the ore is easy to be separated, the rock roadway can be arranged along the lower and lower plates of the ore body. (See Figure D) The smaller the inclination of the ore body, the more the sectioned rock roadway should be placed on the lower plate. The purpose is to make the depth of the blastholes small, in order to improve the rock drilling efficiency. Perforated Metal Sheet,4X8 Perforated Metal Sheet,Stainless Steel Perforated Metal Sheet,Perforated Metal Sheet For Security Door glorybest industry co.,ltd , https://www.nbhbglorybest.com
6) Funnel neck - the funnel neck is completed once (but the leaking culture can be opened separately to meet the needs of the caving ore) (the funnel neck broken stone can be 2 × 2 m 2 ).