A roadway excavation method for electrode directional impact operation

Abstract

A roadway excavation method for electrode directional impact operation, in which a borehole is opened on the roadway excavation surface; one borehole is opened in the center as the first group of boreholes; six boreholes are arranged outside the central borehole as the second group of boreholes, Eight drill holes are arranged outside the second group of drill holes as the third group of drill holes; sixteen drill holes are arranged outside the third group of drill holes as the fourth group of drill holes; Carry out rock-breaking operations with technology; carry out rock-breaking operations for holes drilled between the first and second groups of holes; carry out rock-breaking operations for any two adjacent holes in the second group of holes; carry out the second and third groups of holes Rock-breaking operations for drilling holes between groups of drilling holes; performing rock-breaking operations for any two adjacent drilling holes in the third group of drilling holes; performing rock-breaking operations for drilling holes between the third and fourth groups of drilling holes; Carry out the rock-breaking operation of any two adjacent drilling holes in the fourth group of drilling holes; clean up the rock and continue the follow-up rock-breaking operation. The method has simple steps, high excavation efficiency and low cost.

Description

technical field [0001] The invention belongs to the technical field of underground rock roadway excavation in mines, and in particular relates to a roadway excavation method for electrode directional impact operation. Background technique [0002] At present, my country's coal mining is mainly in the underground mining mode. In this mode, underground roadway excavation is the main process of mine mining. Underground roadway excavation has problems such as slow progress and high cost. At present, mine roadway excavation mainly adopts full-face excavation method, drill and blast method, pilot tunnel method, partial excavation method and comprehensive excavation method; when mechanized excavation cannot be effectively implemented, blasting excavation method is usually used instead, but blasting The tunneling method is easy to cause secondary pollution, and has the disadvantages of high cost and complicated process, which is very unfavorable for the mine's environmental protecti...

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Problems solved by technology

[0002] At this stage, my country's coal mining is mainly in the underground mining mode. In this mode, underground roadway excavation is the main process of mine mining. Underground roadway excavation has problems such as slow progress and high cost.

At present, mine roadway excavation mainly adopts full-face excavation method, drill and blast method, pilot tunnel method, partial excavation method and comprehensive excavation method; when mechanized excavation cannot be effectively implemented, blasting excavation method is usually used instead, but blasting The tunneling method is easy to cause secondary pollution, and has the disadvantages of high cost and complicated process, which is very unfavorable for the mine's environmental protection and efficient production work; in addition, in the traditional blasting tunneling method, the actual footage after blasting is about 1.0-1.5m, and the monthly The amount of excavation is only about 120-150m, the blasting efficiency is poor, the single-cycle blasting progress is low, the excavation is time-consuming and laborious, and the efficiency is slow, which affects the normal progress of the excavation project; therefore, there is an urgent need for a fast and effective method for rapid excavation of the roadway

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