Control method for excavation, over-excavation and under-excavation of underground rock engineering through automatic full-section drilling and blasting method
A control method and technology of over and under excavation, which are applied in the automatic control system of drilling, blasting, seismology, etc., can solve the problems of high cost, low efficiency of detection means, and it is difficult to substantively solve the problems of over and under excavation.
Active Publication Date: 2021-04-27
WUHAN UNIV OF TECH
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Problems solved by technology
However, due to the low efficiency, high cost and large construction disturbance of the existing detection methods, in actual projects, the blasting effect is often observed with the naked eye, and then the blasting parameters are constantly adjusted to reduce the occurrence of over- and under-excavation.
Obviously, it is difficult to substantively solve the problem of over-under-excavation only by observing the blasting effect with the naked eye
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[0034] In order to make the technical solutions and beneficial effects of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0035] Such as figure 1 As shown, an embodiment of the present invention introduces a control method for excavating over and under excavation by automatic full-face drilling and blasting in underground rock engineering, including the following steps:
[0036] S1: Before rock drilling, according to the blasthole layout design plan for cavern blasting, number the blastholes. In this example, the blastholes are classified and numbered as: peripheral holes (Z1~Z19), auxiliary holes (F1~F14), cut holes ( T1~T6);
[0037] S2: Take multiple groups of original rock samples for acoustic detection, according to the relationship C 0 =Max{C 1 , C 2 , C 3 ,...,C n} Determine the wave velocity value C in the intact rock mass 0 , because the rock mass con...
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The invention discloses a control method for excavation, over-excavation and under-excavation of underground rock engineering through an automatic full-section drilling and blasting method. The method comprises the steps that multiple sets of primary rock samples are taken for sound wave detection to determine a wave velocity value C0 in a complete rock mass; based on intelligent control of a multi-arm rock drill, an excitation source is formed by drilling operation of a single drill rod, other blast holes achieve vibration wave response detection from the excitation source through sensors arranged in the drill rod, and a plurality of detection paths are formed; and three-dimensional cloud charts of the wave velocity Ci, the main frequency Fi and the maximum amplitude Ai are respectively drawn, the cross structural plane is comprehensively determined by combining the three-dimensional cloud charts of the wave velocity Ci, the main frequency Fi and the maximum amplitude Ai, and the potential risk area of over-excavation and under-excavation of the current drilling and blasting area is further determined. The technology of the method is used for automatic and full-section drilling and blasting method construction, the drilling efficiency is guaranteed, the detection efficiency of vibration waves between adjacent drilled holes is intelligently improved, the calculation accuracy of spatial scale parameters of a complex structural plane in the rock mass is improved, the blasting process is optimized, the explosive waste is reduced, and the blasting effect is improved.
Description
technical field [0001] The invention relates to the technical field of underground rock engineering full-section blasting excavation technology, in particular to a control method for automatic full-section drilling and blasting excavation of underground rock engineering over and under excavation. Background technique [0002] With the vigorous development of my country's railway transportation, water conservancy and hydropower projects, various underground rock infrastructure constructions such as traffic tunnels and hydraulic tunnels can be seen everywhere. As the main method of underground rock engineering excavation, the drill and blast method is used to control the excavation contour shape of underground caverns. The fully automatic and full-section drill and blast excavation technology has been widely promoted and applied at home and abroad. However, due to the subjective factors of the construction operation and the objective conditions of the surrounding rock, the dri...
Claims
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IPC IPC(8): F42D3/04F42D1/00E21D9/00E21B44/00E21B49/00G01N29/07G01V1/30
CPCF42D3/04F42D1/00E21D9/006E21B44/00E21B49/00G01N29/07G01V1/306G01N2291/011G01N2291/0232G01V2210/624
Inventor 罗忆龚航里袁景凌李新平邓运辰黄俊红瞿登星郭运华马瑞秋谢方王婧
Owner WUHAN UNIV OF TECH