Rock lane digging method

Abstract

The invention discloses a rock gangway drifting method. Firstly, directional blasting technology is adopted, and presplitting cracks are arranged close to the periphery of a rock gangway through blasting. Secondly, loosening blasting technology is adopted to break rocks in the presplitting cracks; directional blasting and loosening blasting can be performed separately and also can be performed synchronously and initiated in sequence; the directional blasting is initiated before the loosening blasting. Finally, a rock gangway drifting machine is adopted to drill broken rocks. By adoption of combination of drifting of the drifting machine and controlled blastings, the invention has the advantages of great reduction of damage on surrounding rocks, increase of safety, improvement of drifting speed and reduction of cost, and is a rock gangway drifting method having the advantages of high efficiency, safety, low cost, good operating environment and low labor intensity. The invention is suitable for drifting various rock gangways and particularly suitable for drifting rock drifts with high hardness.

Description

technical field [0001] The invention relates to a rock roadway excavation technology, in particular to a rock roadway excavation method combining a controlled blasting technology and a roadhead machine excavation technology. technical background [0002] At present, in the construction of rock roadways in mines, there are generally two methods of rock roadheader excavation and drill-and-blast method, mainly adopting the drill-and-blast method. The tunneling efficiency of the two methods is not high, and it is difficult to break through 100m per month. [0003] At present, in the construction of rock roadways, the drilling and blasting method accounts for more than 90%. The drilling and blasting method uses rock drills to drill rocks, and uses explosives to achieve instant blasting, which has the characteristics of fast rock breaking speed, which is an important factor that still accounts for the main proportion of the development of drilling and blasting methods. The main ...

AI Technical Summary

Problems solved by technology

[0008] However, when the rock roadheader breaks through the hard rock formation, the specific energy consumption per unit is large, the power consumption and the excavation cost are more than 10 times higher than that of the drill and blast method, and the rock breaking speed is slow, the excavation speed is limited, and the cutting teeth of the roadheader are seriously worn out. , The machine is bulky, the equipment failure rate is high, the reliability and adaptability are poor

Especially in high-strength and highly abrasive rock formations, not only the efficiency is very low, but also the power consumption and the cost of tunneling materials are quite high

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