A Blasting Method for Sloping Ore Body Cutting Uphill and Pulling Troughs

Abstract

The invention discloses an oblique ore body upward incision trough broaching detonation method. During upward incision construction, upward incision is conducted two times; a shallow hole drill jambo is used for utilizing the oblique cut for conducting drilling and blasting tunneling on the accurate mining high upper, the compensation space and the free face of secondary blasting are increased, and the oblique length of the upward incision is reduced; and then a medium-deep hole drill jambo is used for utilizing the cylinder cut to conduct one-time throughout detonation on cutting. By means of the oblique ore body upward incision trough broaching detonation method, the oblique ore body upward incision can form the upward incision through one-time shallow hole drilling and blasting and one-time medium-deep hole drilling and blasting, safety risks in the multi-time shallow hole trough broaching operation process of a traditional method are effectively reduced, the problem that in the oblique ore body trough broaching process, a trolley, an excavator and other devices cannot directly work on net anchoring, rock drilling and scraping operation without bottom rising due to the large ore body gradient is solved, and the purposes of increasing the mining speed, improving the ore quality and reducing the safety risks are achieved.

Description

technical field [0001] The invention belongs to the field of mining engineering, and relates to a method for blasting by cutting an inclined ore body and pulling grooves up a mountain. Background technique [0002] At present, in the mining activities of non-coal underground mines, except for a small number of chamber blasting, blasting and collapsing technology are generally used. In the mining process of inclined and gently inclined ore bodies in non-metallic sedimentary deposits, due to the constraints of safety, transportation and other factors, it is usually necessary to divide the ore body into mine units for mining. The cutting groove with the same body inclination angle is very important for the recovery of the mine as the free surface of the mining blast and the compensation space for ore crushing. [0003] Due to the immature one-time trough forming technology for medium and deep holes, the limited climbing ability of domestic mechanized mining equipment, and the ...

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Problems solved by technology

[0003] Due to the immature one-time trough forming technology for medium and deep holes, the limited climbing ability of domestic mechanized mining equipment, and the slope of the inclined ore body is between 30° and 55°, therefore, under the current technical conditions, in the inclined ore The construction of a satisfactory cutting groove in the body usually requires multiple blasting and repeated bottoming, which has caused difficulties such as unguaranteed ore quality, low efficiency of personnel and equipment, and prominent safety hazards for the production of the enterprise.

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