Mining method for large-inclined angle laminar non-coal solid mineral deposit

Abstract

The invention provides a mining method for large-inclined angle laminar non-coal solid mineral deposit, which comprises the following steps of: tunneling open-off cut, section tailgate, section haulage way, finishing cut and cut-off, remaining and setting a protective jamb at one side of the finishing cut adjacent to a working face, and setting a fake slant angle beta along with a working face boosting direction from a through place between the finishing cut and the section tailgate; and recovering from the tailgate to the haulage way according to the set direction of the fake slant angle beta, and along with the boosting of the working face, additionally increasing a horizontal dense support isolated gob, so that the working face mine pressure control can be obviously improved by a horizontal sectionalized dense support cutting supporting, waste rock baffling and isolating gob. The steps are sequentially circulated till that the large-inclined angle laminar non-coal mining of the whole mining area is completed. The method is particularly suitable for the laminar thin mineral deposit with the ore bed inclined angle of 30-60 degrees, and can be suitable for the thickness change of the ore bed; and the method is safe and convenient for workers to work on the working face, and the working face is quick in boosting speed, and the method is high in efficiency.

Description

technical field [0001] The invention relates to the technical field of mining of non-coal solid mines, and relates to a mining method suitable for thin ore bodies with large dip angle layered non-coal solid deposits. technical background [0002] For layered thin ore bodies with thickness less than 3m and dip angle α less than 30°, the long-wall caving method currently used is an effective mining method. This method has relatively simple mining work and working face layout, and is a mining method with large production capacity, high labor productivity, small loss and dilution, and good ventilation conditions. However, when the inclination angle of the ore seam is further increased to a large inclination angle of 30°~60°, the roof management of the longwall caving method is complicated, and the support work is labor-intensive; The conversion rate affects the normal production. In addition, the transportation roadway and the ore retention hole are arranged outside the ore se...

AI Technical Summary

Problems solved by technology

However, when the inclination angle of the ore seam is further increased to a large inclination angle of 30°~60°, the roof management of the longwall caving method is complicated, and the support work is labor-intensive; rate, affecting the normal production

In addition, the transportation roadway and the ore retaining hole are arranged outside the ore seam, which greatly increases the amount of rock excavation outside the vein. These problems have greatly reduced the production speed and output of the long-wall caving method, so it is not suitable for use.

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