Stripping construction method of open-pit coal mining in plateau area

Abstract

The present invention relates to a stripping construction method for coal mine mining, in particular to a stripping construction method for open-pit coal mines in plateau areas, which sequentially includes: arranging the working surface, arranging the detonation network, drilling, loading explosives, detonation, loading and transportation, the steps of arranging the detonation network Wherein, the detonation network is a differential blasting detonation network, the detonation network includes a number of blastholes arranged at intervals, the blastholes are arranged in four to six rows, and the maximum length of the detonation network is less than or equal to 30 meters. The stripping construction method of the open-pit coal mine in the plateau area of ​​the present invention sets the blasting network as a differential blasting blasting network, which can effectively control the blasting shock wave, vibration, noise and flying stones; the operation is simple, the degree of fragmentation is good, the blasting efficiency is improved, and the blasting The scale is controlled within four to six rows of blastholes, and the maximum length of the detonation network is less than or equal to 30 meters, so as to ensure that the excavator can complete the excavation before the rock and soil clods after blasting fall back and freeze together.

Description

Technical field [0001] The present invention involves the construction method of coal mine mining and peeling, and specially involves the construction method of open -air coal mines in the plateau area. Background technique [0002] In the mining of coal mines in the plateau area, because the coverage layer of mines in these plateau regions is usually thinner, the coverage of the coverage layer is large, and the area of mining areas is large, so most of the open -air mining is used for mining.In the construction of the stripping coverage layer, the coverage layer is usually used to use the blasting method to mine the cover layer, but due to the climate of the plateau region, such as the high altitude and low temperatureTogether, the loading, transportation and unloading of the coverage layer have brought great difficulties, which seriously affects the speed of mining. [0003] At the same time, in the drilling steps in front of the blasting coverage layer, because the coverage la...

AI Technical Summary

Problems solved by technology

With the difference of ice content and freezing degree, its drilling properties are also changing, a large amount of mechanical energy is converted into heat energy through friction, which deteriorates the formation and discharge conditions of drill cuttings, reduces drilling efficiency, and ultimately leads to the inability to continue drilling The main reason is that friction generates heat during the drilling process, which causes the permafrost to melt and forms a mud mass that blocks the formation and discharge of cuttings, further affecting the construction progress of coal mining.

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