Tunnel face blast hole charging method
A technology of face and charge, which is applied in the field of blasting to achieve the effects of improving work efficiency, improving operation accuracy, and improving the effect of controlling blasting
Active Publication Date: 2019-06-21
CHINA 19TH METALLURGICAL CORP
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Problems solved by technology
However, there is little research on how to control the quality of radially uncoupled charges and axial segmented charges and their reasonable charge methods in the actual application of these controlled blasting technologies.
Method used
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[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0028] The blast hole charging method on the tunnel face includes the following steps:
[0029] A. Determine the size of the blast hole 11, the radial non-coupling charge coefficient, the eccentric direction and eccentric amount of the charge roll 8, the axial charge structure and the charge size of the section interval according to the blasting parameter design, and select the charge roll that meets the requirements 8 and prepare the charge device; the charge device includes a charge cartridge 1, a guide head 2, a drug roll gasket 3, a positioning member 5, two fixing rings 6 and two adjustment structures 4; the two adjustment structures 4 are located at the At both ends of the cartridge 1, the adjustment structure 4 includes a jacking rod 4-3, a plurality of fixing heads 4-1 and a plurality of jacking heads 4-2, and each fixing head 4-1 is al...
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The invention discloses a tunnel face blast hole charging method, relates to the technical field of blasting, and provides a charging method capable of guaranteeing charging position precision. The method comprises the following steps that A, a cartridge meeting the requirements is selected, and a charging device is prepared, wherein the charging device comprises a charging barrel, a guide head, acartridge gasket, a positioning piece, two fixing rings and two adjusting structures, the two adjusting structures are located at the two ends of the charging barrel correspondingly, the fixing ringsare formed by bending steel wires, the cross section of the cartridge gasket is in an arc shape, and the shape of the guide head is conical; B, the fixing rings are connected with the adjusting structures, and the positions of the fixing rings are adjusted; C, the cartridge gasket penetrates through the charging barrel to be placed on the fixing rings; D, the cartridge, an axial spacing layer anda radial spacing layer are contained into the charging barrel; E, the guide head is installed to the front end of the charging barrel; and F, the tunnel face blast hole charging device is installed into a blast hole, the charging barrel is rotated to adjust the eccentric direction of the cartridge, and the positioning piece is connected with surrounding rock.
Description
technical field [0001] The invention relates to the technical field of blasting, in particular to a method for charging blastholes on the face of a tunnel. Background technique [0002] With the continuous improvement of the current level of construction technology and the performance of construction equipment, higher and higher standards and requirements have been put forward for underground engineering and tunnel engineering in the construction of drilling and blasting methods. and micro-vibration blasting and other new controlled blasting technologies. However, when using controlled blasting technology in tunnel blasting engineering, it is necessary to strictly control the charge structure and charge quality of the blast hole on the tunnel face. The shock wave and blasting gas cause excessive disturbance to the surrounding rock, and the radial non-coupling charge structure is often used; in order to adjust the excessive concentration of the charge when charging the blast...
Claims
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IPC IPC(8): F42D1/08F42D3/04
Inventor 孙从煌熊德武王一余江
Owner CHINA 19TH METALLURGICAL CORP