A non-explosive mechanized mining method in deep hard rock mines

Abstract

The invention discloses a non-explosive mechanized mining method in deep hard rock mines, which comprises the following steps: arranging a transport roadway and cutting the roadway to form a mine pillar to be mined; using the free surface of the mine pillar close to the transport roadway as a working On the working face, a pressure relief groove is excavated at the bottom of the ore pillar; the ore body above the pressure relief groove is divided into multiple strip-shaped ore bodies distributed side by side along the ore body trend; The strip-shaped ore body is mined; the mining operation is pushed forward by the width of a long strip-shaped ore body, and the above is repeated until all the ore pillars are mined. This mining method utilizes the characteristics of ore rock fragmentation in the excavation loose area formed by stress redistribution after excavating the roadway, and further changes the stress state of the ore body to be mined by excavating a pressure relief groove under the ore pillar to improve the reliability of the ore rock. Cutting performance, this mining method designs a new type of high-frequency breaker, which can improve mining efficiency, so as to realize high-efficiency non-explosive mechanized mining of hard rock mines.

Description

technical field [0001] The invention belongs to the technical field of mining of hard rock mines, in particular to a non-explosive mechanized mining method of deep hard rock mines. Background technique [0002] In order to meet the demand for a large number of mineral resources brought about by economic and technological development, the depth of mining at home and abroad has gradually deepened. Among them, most of the deep non-coal mines are hard rock mines. At present, the mining of non-coal hard rock mines is still dominated by the drilling and blasting method, but due to the disadvantages of large blasting damage, low energy utilization rate, and poor safety, it cannot meet the needs of deep mining, and will gradually be replaced by small-disturbance mines. It is replaced by non-explosive mechanized mining with advantages such as high energy utilization rate. [0003] However, limited by the characteristics of high hardness, high strength, high abrasiveness, and good i...

AI Technical Summary

Problems solved by technology

At present, the mining of non-coal hard rock mines is still dominated by the drilling and blasting method, but due to the disadvantages of large blasting damage, low energy utilization rate, and poor safety, it cannot meet the needs of deep mining, and will gradually be replaced by small-disturbance mines. It is replaced by non-explosive mechanized mining with advantages such as high energy utilization rate

[0003] However, limited by the characteristics of high hardness, high strength, high abrasiveness, and good integrity of hard rock ore bodies, roadheaders currently widely used in coal mining cannot effectively break hard rock, but can efficiently break hard rock. Tunnel boring machine (TBM) is expensive and large in size, which cannot meet the economic considerations in the mining process of hard rock mines

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