Method to make a shielding slot in pit wall rock mass using non-explosive destructive mixture

Conventional blasting technologies cause disintegration, fracturing and weakening of pit wall rock mass. The use of lower explosive agents, relay detonators and special charge designs abates the impact on the pit wall rock mass but increases expenses connected with breakage and sometimes fails to ensure wanted results. It is recommended to perform drilling and blasting in pit wall rock mass using novel non-explosive destructive mixture placed in pre-drilled boreholes, which preserves natural integrity of rocks, minimizes cleavage, reduces risk of falls-off and increases pit slope stability. This article describes a new method of wall control blasting in adjacent rock mass around an open pit using the non-explosive destructive mixture. The lab-scale tests prove the new-composition non-explosive destructive mixture provides high-quality wall control blasting up/down a bench, reduces labor input of drilling and blasting, ensures eco-friendliness, increases safety as well as cuts down cost and energy of mining.The theoretical investigation into the process of making a slot in pit wall rock mass has determined effective spacing of the perimeter holes with non-explosive destructive mixture. The laboratory studies show that the new method and mixture create high interior pressure in holes, which contributes to static disintegration and fracture of rocks.

Nasirov U. F., Zairov Sh. Sh., Ochilov Sh. A., Ravshanova M. Kh., Ergashev O. S. Method to make a shielding slot in pit wall rock mass using non-explosive destructive mixture. MIAB. Mining Inf. Anal. Bull. 2021;(3):72-82. [In Russ]. DOI: 10.25018/0236-1493-2021-3-072-82.

U.F. Nasirov, Dr. Sci. (Eng.), Professor, Deputy Director, Almalyk branch of National University of Science and Technology «MISiS», 110100, Almalyk, Uzbekistan, e-mail: unasirov@yandex.ru,
Sh.Sh. Zairov¹, Dr. Sci. (Eng.), Professor, e-mail: sher-z@mail.ru,
Sh.A. Ochilov², PhD., Associate Professor, e-mail: o.shuhrat84@yandex.ru,
M.Kh. Ravshanova¹, Senior Lecturer, e-mail: m.ravshanova@inbox.uz,
O.S. Ergashev², Master’s Degree Student,
¹ Navoi State Mining Institute, 210100, Navoiy, Uzbekistan,
² Islam Karimov Tashkent State Technical University, 100095, Tashkent, Uzbekistan.

U.F. Nasirov, e-mail: unasirov@yandex.ru.

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