A roadway smooth surface blasting method
A smooth blasting and roadway technology, which is applied in blasting and other directions, can solve the problem of inaccurate blasting impact control, etc., and achieve the effects of fast lateral transfer, improved forming effect, and improved transfer uniformity
Active Publication Date: 2019-03-29
JIANGXI UNIV OF SCI & TECH
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Problems solved by technology
Chinese invention patent CN 101738148 B discloses a smooth blasting method for deep holes in roadways. Although this method can increase the speed of drilling and blasting tunneling, this method does not control the blasting impact force accurately during the blasting process, resulting in After blasting, secondary treatment is required on the blasting surface
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[0017] Smooth blasting excavation was carried out in the Yanzishan mining area of Datong Coal Industry. According to the characteristics of high rock hardness in the Yanzishan mining area, the following operations are carried out.
[0018] A. Excavate the first slots on the construction surface; the first slots are arranged in several rows in the direction of the axis of the construction surface, and the first slots in adjacent rows are arranged alternately;
[0019] The included angle between the first slot and the palm face is 67°, and two axial pressure relief slots are dug symmetrically on both sides of the first slot, and the distance between adjacent first slots is 1.8m.
[0020] The first slot is provided with two different inner diameter areas, the first inner diameter and the second inner diameter, the first inner diameter area is the outer 2 / 3 of the first slot, and the second inner diameter area is the inner 1 / 3 of the first slot The ratio of the first inner diam...
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The invention discloses a roadway smooth blasting method. The method includes the following steps that A, a plurality of rows of first slotted holes are dug on a construction surface, the multiple rows of the first slotted holes are formed by using the axis of the construction surface as the direction, and every two adjacent rows of the first slotted holes are formed in a staggered mode; B, a plurality of second slotted holes are dug in the outer sides of the first slotted holes; C, the first slotted holes are filled with explosives, and by using the axis of the construction surface as the axis of symmetry, the explosives filled in the first slotted holes in the two sides of the axis of the construction surface meet the requirement of a normal distribution mode; and D, a stage delayed detonation mode is used for performing blasting construction. By the adoption of the roadway smooth blasting method, the defects in the prior art can be overcome, and control accuracy of the blasting surface is improved.
Description
technical field [0001] The invention relates to the technical field of roadway blasting, in particular to a roadway smooth surface blasting method. Background technique [0002] Smooth surface blasting refers to a blasting method that drills and charges along the designed excavation contour, and detonates after the main blasting hole in the excavation area to obtain a relatively flat wall surface. Chinese invention patent CN 101738148 B discloses a smooth blasting method for deep holes in roadways. Although this method can increase the speed of drilling and blasting tunneling, this method does not control the blasting impact force accurately during the blasting process, resulting in After blasting, secondary treatment is required on the blasting surface. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a roadway smooth surface blasting method, which can solve the deficiencies of the prior art and improve the accu...
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IPC IPC(8): F42D1/00F42D3/04
CPCF42D1/00F42D3/04
Inventor 刘洪兴邓飞
Owner JIANGXI UNIV OF SCI & TECH