Medium-length hole ore matching type mining method for steeply inclined thin vein

Abstract

According to the medium-length hole ore matching type mining method for the steeply inclined thin vein, mining engineering arrangement is reasonably planned, medium-length hole blasting is adopted, the mining engineering amount is reduced, the number of mining blocks of high-grade ore is increased, utilization of the high-grade ore is accelerated, and ore matching type mining of a stope is achieved; comprising the steps that an ore body is divided into sections in the depth direction, the height is determined according to the stability of ore rocks, and all the sections are connected and communicated through ramps; arranging a free space for blasting the segmented ore body and an along-vein roadway of a main transportation road of the segmented ore body in the segmented lower ore body along the trend of the ore body, and excavating the along-vein roadway to extract by-product ore in advance; dividing the ore body of each section into high-grade, medium-grade and low-grade sections and corresponding mining rooms along the trend, setting the minimum length limit value of the mining rooms, and adjusting the lengths of the mining rooms; according to the method, mining rooms are preferentially arranged for high-grade subareas in all the subareas, then middle-grade mining rooms are arranged, and all the mining rooms are connected with the roadways along the vein through room staggered lanes to form transportation channels outside the vein of all the mining rooms, so that the single-cycle ore blasting amount and the mining capacity of the steeply-inclined thin vein are greatly improved; and large-scale mining of the steeply inclined thin vein can be realized.

Description

technical field [0001] The invention relates to a mining method, in particular to a medium-deep hole ore blending mining method with steeply inclined thin veins. Background technique [0002] The mining technology of steeply inclined thin veins mainly includes shallow hole ore retention method, wall cutting and filling method, and layered filling method. One is shallow hole ore retention method; the ore block is divided into ore room and ore pillar, first mining room and then mining pillar; mining in the mine room from bottom to top, releasing 1 / 3 of the caving ore each time (local ore drawing) , the remaining part is kept in the stope as a working platform for continued mining, and will be released after the entire mine is mined (concentrated ore output); after all the ore in the mine is released, return to the mining pillar and deal with the goaf. Its advantage is that the structure and production process are simple, the management is convenient, the ore can be discharged...

AI Technical Summary

Problems solved by technology

The advantage is that the loss and dilution rate is low, and the disadvantage is that the quality of the backing plate cannot meet the requirements, the ore loss rate and the dilution rate are high, the process is complex, the efficiency is low, and the labor intensity is high; the layered filling method; according to the stability of the ore rock It is the upward filling method and the downward filling method. The ore blocks are divided into ore rooms and ore pillars. Maintain the surrounding rocks of the upper and lower panels, and create mining operation conditions for upward or downward mining; after several ore rooms or all-stage mines are mined, the back-mining ore pillar is carried out; the mining space and range can be controlled, and personnel and equipment are placed on the exposed roof The roof needs to be effectively controlled for lower operations; its advantages include many mining schemes and flexible layout, which can meet the needs of various mining technical conditions; the loss rate and dilution rate are low; it is conducive to ground pressure management and good safety, and its disadvantages are: The filling process is added, the mining operation management is complicated, the cost is high, and the efficiency is low

[0003] These three types of traditional mining methods have a common problem in that they all use shallow hole blasting, and the mining capacity is extremely low, which is manifested in large-scale mining projects, difficulty in realizing large-scale mining, high mining costs, and poor mine economic benefits

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