A kind of deep hole blasting and filling method

Abstract

The invention discloses a deep hole blasting filling method. The deep hole blasting filling method includes the steps that the bottom of a blast hole is filled and blocked with cement, and meanwhile the bottom resistance line is reserved; a pre-designed amount of first explosive is loaded to the bottom of the blast hole, and meanwhile a first double-detonator and detonating cord igniting explosive package and a first detonator are loaded into the blast hole along with the first explosive; the position on the top of the first explosive is filled with an appropriate amount of river sand; a pre-designed amount of second explosive is continuously loaded to the top of the river sand, and meanwhile a second double-detonator and detonating cord igniting explosive package and a second detonator are loaded into the blast hole along with the second explosive; after all the explosive is loaded into the blast hole, the top of the second explosive is filled with fine river sand, and then two water bags are hoisted into the blast hole and press on the top of the fine river sand. The deep hole blasting filling method solves the problems that according to an original filling scheme, the number of plug holes is large and a large amount of dust is generated.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a deep hole blasting filling method. Background technique [0002] The current annual mining volume of Fankou lead-zinc mine is about 1.6 million tons, of which the amount of ore collapse undertaken by deep hole blasting is about 450,000 to 500,000 tons, and the number of blasting times is about 90 times a year. In the process of blasting construction, according to relevant theories, filling with river sand after the charge is completed can increase the pressure of the detonation gas on the hole wall and prolong the time of the pressure, thereby greatly improving the degree of rock expansion and cracking. Throwing distance. When the traditional river sand is used for filling at intervals, the plugging rate after each blasting is about 80%. At the same time, a large amount of dust will be generated in the holes, which has a negative impact on underground ventilation. ...

AI Technical Summary

Problems solved by technology

When the traditional river sand is used to fill in intervals, the hole blocking rate after each blasting is about 80%. At the same time, a large amount of dust will be generated in the hole, which has a negative impact on underground ventilation.

Calculated on the basis of 90 blastings per year and 50 charge holes for each blasting, the number of blocked holes after blasting to be dealt with each year is about 3600 (times), regardless of the manpower, material resources or time required for processing And so on, it's a huge burden

Images