Safe mining method for footwall broken surrounding rock ore body under seabed
A mining method and a technology for crushing surrounding rocks, which are applied in mining minerals, mining equipment, special mining, etc., can solve the problems that mining is not universal, achieve reduced support engineering, less waste rock excavation, and ensure safety Effect
Active Publication Date: 2021-04-13
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
However, this method is not universally applicable to the mining of medium-thick ore bodies with broken surrounding rocks on the upper and lower walls.
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[0037] see Figure 1-6 , a method for safe mining of the broken wall rock ore body of the upper and lower plates under the seabed, comprising the steps of:
[0038] S1, in the unsealed original lower vein outer vein roadway 1, adopt the pipe jacking device to construct the pipe jacking through the vein 2 to reach the ore body 3;
[0039] S2, arrange the ore body 3 according to the vertical direction of the ore body 3, and divide it into mutually spaced mine rooms and ore pillars;
[0040] S3, mining the quasi-slope 4 in the vein, cutting the roadway in the vein, and using the bolt 5 to support the roadway in the vein in time; S4, dividing the ore body 3 into mining and cutting layers 6 and 6 arranged at intervals in terms of spatial height relationship The reserved layer 7 and the mining and cutting layer 6 are connected by the vein along the vein roadway 8 and the ramp 4 as the ore exit channel. The mining sequence is to mine the mining and cutting layer 6 from bottom to top...
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The invention relates to the technical field of mining, and discloses a safe mining method for a footwall broken surrounding rock ore body under the seabed. An original footwall outside-vein-following roadway is utilized, a pipe jacking method is adopted for vein penetrating construction, a large number of supporting projects of roadway connection construction are reduced, meanwhile, disturbance of the pipe jacking method is small, disturbance to footwall broken surrounding rock is reduced, and the construction safety is guaranteed; an arrangement form of intra-vein accurate mining is adopted, ores produced through tunneling can be used as byproduct ores, and compared with original footwall outside-vein construction, the tunneling amount of waste rock is greatly reduced; and mining and cutting layers and reserved layers are arranged at intervals, one layer is reserved for stoping from bottom to top, the reserved layers serve as horizontal layered supports, a stope is filled in time after each mining and cutting layer is stoped, the risk of overlying ore rock deformation is greatly reduced, and safe stoping of the footwall surrounding rock ore body under the offshore can be achieved.
Description
technical field [0001] The invention relates to the technical field of mining, in particular to a method for safe mining of an upper and lower disc broken surrounding rock ore body under the seabed. Background technique [0002] The safe, high-efficiency and low-cost mining of ore bodies that occur under the sea has gradually received more attention. At present, the main mining methods of this type of ore body are upward horizontal filling mining method, downward approach filling mining method and upward approach filling mining method. The implementation of these mining methods all relies on vertical shafts or ramps, and in the hanging wall or footwall construction stage transport roadway, segmental transport roadway and stope access road and other shaft engineering. For the working conditions where the surrounding rocks of the upper and lower walls are broken, a large number of roadway excavations will greatly disturb the surrounding rocks. If the surrounding rocks with de...
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IPC IPC(8): E21C50/00E21F15/00E21F15/08E21F15/04E21F1/00F42D3/04F42D1/00F42D1/08F42D1/18F42D1/04
CPCE21C50/00E21F1/006E21F15/005E21F15/04E21F15/08F42D1/00F42D1/043F42D1/08F42D1/18F42D3/04
Inventor 曹帅宋卫东李佳建黄智强郑迪
Owner UNIV OF SCI & TECH BEIJING