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CN-121993202-A - Large-dip-angle ore body mining method based on space deconstruction-discrete chamber formation

CN121993202ACN 121993202 ACN121993202 ACN 121993202ACN-121993202-A

Abstract

The invention discloses a large-dip-angle ore body mining method based on space deconstruction-discrete chamber formation, which relates to the technical field of mine mining and comprises the following steps of S1, constructing a three-dimensional discrete engineering topological structure, S2, conducting key parametric design, S3, conducting blast hole collaborative arrangement and extraction in a single discrete extraction chamber, S4, conducting multi-middle section collaborative mining, S5, conducting tissue parallel production and ventilation, and fundamentally improving the intrinsic safety level of mining operation by constructing a forced discrete engineering topological structure of an extra-pulse trunk roadway-short-distance horizontal connecting roadway-discrete extraction chamber and decoupling a traditional large-area continuous mining field into a series of mining units which are independent in space and complete in function.

Inventors

  • WU CHUANXING
  • YAN JIANGXIN

Assignees

  • 吴传兴

Dates

Publication Date
20260508
Application Date
20260316

Claims (7)

  1. 1. The large-dip-angle ore body mining method based on space deconstruction-discrete chamber formation is characterized by comprising the following steps of: S1, constructing a three-dimensional discrete engineering topological structure, namely arranging an extra-vein trunk tunnel in a stable rock stratum outside an ore body, wherein the tunnel is parallel to the running direction of the ore body, tunneling a plurality of independent short-distance horizontal connecting tunnels at a preset interval D from the vertical direction of the ore body of the extra-vein trunk tunnel, wherein each short-distance horizontal connecting tunnel only serves one stoping chamber; S2, carrying out key parameterization design, namely determining the distance D of the short-distance horizontal connecting lane, wherein the calculation mode is D=2.L sides.cos alpha+delta S, wherein L sides are the design length of side holes for controlling trend boundaries, alpha is the inclination angle of the side holes, alpha is larger than the natural repose angle phi of ores, and delta S is the safety and synergistic allowance; s3, carrying out collaborative arrangement and stoping of blast holes in a single discrete stoping chamber, wherein the blast holes are arranged on the section of the chamber, Arranging fan-shaped holes on the trend side according to the inclination angle alpha of the side holes to form a side slope profile; arranging blastholes by pressing a disc side profile angle beta down at the lower disc side, wherein beta down is equal to the ore body inclination delta; arranging blast holes at an upper disc side contour angle beta up at the upper disc side, wherein beta up is larger than the ore body inclination delta; S4, implementing multi-middle section collaborative mining, namely arranging a plurality of mining middle sections in the vertical direction, wherein the inlets of the short-distance horizontal connecting roadways of the upper and lower adjacent middle sections are staggered by a distance of D/2 along the trend; S5, organizing parallel production and ventilation, namely organizing a plurality of chambers to operate in parallel by taking each discrete extraction chamber as an independent production unit, forming an air inlet and air return channel by using each short-distance horizontal connecting lane as a unique air inlet and air return channel by the ventilation system, and returning the polluted air to an extravenous trunk lane along the same connecting lane after fresh air flows into a chamber cleaning operation surface through the connecting lanes, so as to form a short-circuit circulating ventilation mode.
  2. 2. The large-dip mining method based on space deconstruction-discrete cave formulation according to claim 1, wherein in step S1, the length of the short-distance horizontal connecting roadway is 10m to 30 m, and the construction gradient is 10% or less.
  3. 3. The method for mining the large-dip-angle ore body based on the space deconstruction-discrete chamber according to claim 1, wherein in the step S2, the dip angle alpha of the side holes is 50-60 degrees, and the safety and cooperative allowance delta S is 0.5-1.5 m.
  4. 4. A method of mining large dip ore bodies based on spatial deconstruction-discrete cave formulation according to claim 1, wherein in step S3 the upper disc side profile angle βup is the ore body dip delta plus 10 ° to 15 °.
  5. 5. The method of mining a large dip angle ore body based on spatial deconstruction-discrete chamber formation of claim 1, further comprising setting a roof compensation angle θ of 8 ° to 12 ° for inducing roof fall in cooperation with βup in step S3.
  6. 6. The method for mining large-dip-angle ore bodies based on space deconstruction-discrete chamber formation according to claim 1, wherein in step S4, the height H of the single mining middle section satisfies H≤Lside.sin. Alpha.
  7. 7. The method of mining a large dip angle ore body based on spatial deconstruction-discrete cave formulation of claim 1, wherein in step S4, the length of the elongated central bore is greater than the length of the side bore L-edge.

Description

Large-dip-angle ore body mining method based on space deconstruction-discrete chamber formation Technical Field The invention relates to the technical field of mining, in particular to a large-dip-angle ore body mining method based on space deconstruction-discrete cave. Background Along with the continuous development of mining engineering technology, the mining efficiency and safety problems of large-dip-angle ore bodies are increasingly focused by industries, and the traditional large-dip-angle ore body mining methods, such as a segmented open-stope method, a filling mining method and the like, have certain effects under specific conditions, but still face a plurality of technical bottlenecks when processing complex geological structures and high-stress environments, particularly in the areas with complex spatial structures of ore bodies and frequent ground pressure activities, the traditional continuous stope layout is difficult to effectively cope with systematic risks such as unsmooth ventilation, ground pressure concentration and the like, so that the mining efficiency is low, and safety accidents are frequent. However, one of the significant problems in the current large-dip angle mining technology is that the traditional continuous stope design causes long ventilation path and large resistance, and is difficult to effectively ensure fresh air supply and timely discharge of polluted air on a working surface, the problem is particularly prominent in the large-dip angle and high-stress mining technology, because the inclination angle of the mining body is large, the air flow direction in the continuous stope is difficult to control, and a vortex or breeze area is often formed, so that the working environment is deteriorated, the health and safety of operators are seriously affected, meanwhile, the potential safety hazards such as gas accumulation are possibly caused due to unsmooth ventilation, the improvement of the mining strength and the efficient recovery of resources are further limited, and therefore the improvement is needed. Disclosure of Invention The invention aims to provide a large-dip-angle ore body mining method based on space deconstruction-discrete cave formulation, which aims to solve the problems that the ventilation path is long and the resistance is large due to the traditional continuous stope design in the prior art, and the fresh air supply and the timely discharge of the polluted air on a working face cannot be effectively ensured, so that the health and the safety of operators are affected, the mining intensity is limited, and the resources are efficiently recovered. In order to achieve the purpose, the invention provides the following technical scheme that the large-dip-angle ore body mining method based on space deconstruction-discrete cave formulation comprises the following steps: S1, constructing a three-dimensional discrete engineering topological structure, namely arranging an extra-vein trunk tunnel in a stable rock stratum outside an ore body, wherein the tunnel is parallel to the running direction of the ore body, tunneling a plurality of independent short-distance horizontal connecting tunnels at a preset interval D from the vertical direction of the ore body of the extra-vein trunk tunnel, wherein each short-distance horizontal connecting tunnel only serves one stoping chamber; S2, carrying out key parameterization design, namely determining the distance D of the short-distance horizontal connecting lane, wherein the calculation mode is D=2.L sides.cos alpha+delta S, wherein L sides are the design length of side holes for controlling trend boundaries, alpha is the inclination angle of the side holes, alpha is larger than the natural repose angle phi of ores, and delta S is the safety and synergistic allowance; s3, carrying out collaborative arrangement and stoping of blast holes in a single discrete stoping chamber, wherein the blast holes are arranged on the section of the chamber, Arranging fan-shaped holes on the trend side according to the inclination angle alpha of the side holes to form a side slope profile; arranging blastholes by pressing a disc side profile angle beta down at the lower disc side, wherein beta down is equal to the ore body inclination delta; arranging blast holes at an upper disc side contour angle beta up at the upper disc side, wherein beta up is larger than the ore body inclination delta; S4, implementing multi-middle section collaborative mining, namely arranging a plurality of mining middle sections in the vertical direction, wherein the inlets of the short-distance horizontal connecting roadways of the upper and lower adjacent middle sections are staggered by a distance of D/2 along the trend; S5, organizing parallel production and ventilation, namely organizing a plurality of chambers to operate in parallel by taking each discrete extraction chamber as an independent production unit, forming an air inlet and air return channel by usin