Vertical shaft efficient blasting tunneling method
A vertical shaft and high-efficiency technology, applied in blasting, well sinking, shaft equipment and other directions, can solve the problems of low utilization rate of blasting holes, affect blasting effect, and high throwing, and achieve the effect of improving blasting effect and increasing utilization rate of blasting holes
Inactive Publication Date: 2021-04-23
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
Among them, due to the clamping effect of the surrounding rock at the bottom of the blasthole and the large distance between the bottom and the bottom of the hole, the utilization rate of the blasthole is generally low, resulting in poor blasting effect.
Because the bottoms of the cut holes are very close to each other, the explosives are relatively concentrated, and the blasting energy obtained by the rock in the eye socket of the cut is greater, which can relatively effectively overcome the clamping effect of the bottom rock. Throwing is very high, and the drilling machinery and equipment in the well are often broken, and the accuracy of the eye position is not easy to be accurate due to squinting, which affects the blasting effect
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[0037] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0038] It should be clear that in order to illustrate the present invention more clearly, numerous technical details are described in the following specific embodiments, and those skilled in the art should understand that the present invention can also be implemented without some of the details. In addition, in order to highlight the gist of the present invention, some methods, means, parts and applications that are well known to those skilled in the art are not described in detail, but this does not affect the implementation of the present invention. The embodiments described herein are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the presen...
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The embodiment of the invention provides a vertical shaft efficient blasting tunneling method, and relates to the technical field of vertical shaft construction. The method comprises the following steps: drilling empty holes in the middle of to-be-tunneled vertical shaft slotting holes; using the empty holes for providing a free surface for blasting of peripheral slotting holes; and after detonating the peripheral slotting holes, guiding explosion stress waves by the empty holes to be emitted and stretched on the free surface so as to crush rocks. Due to the fact that the empty holes drilled in the middle of the slotting holes can provide more free surfaces and space compensation for slotting blasting, full utilization of slotting blasting energy is facilitated, the blast hole utilization rate and vertical shaft blasting single-cycle footage are improved, and the blasting effect is improved conveniently. The method is suitable for vertical shaft blasting tunneling construction engineering.
Description
technical field [0001] The invention relates to the technical field of shaft construction, in particular to a high-efficiency blasting and excavation method for shafts. Background technique [0002] With the continuous increase of resource mining intensity, the shallow resources of the earth are decreasing day by day, the mining depth of mineral resources is increasing, and the number of shafts with a depth of more than 1000m is also increasing year by year, and the depth of some shafts even reaches more than 2000m. Shafts are the throat passages for deep underground resources mining, and their engineering volume accounts for 12% to 30% of the total mine and roadway engineering according to the amount of gangue output, while the construction period accounts for 30% to 55% of the total construction period of the shaft and roadway engineering. As the shaft depth increases and the complexity of deep geological conditions increases, the shaft shaft construction period will have ...
Claims
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IPC IPC(8): F42D1/00F42D3/04E21D1/00E21D1/06
CPCF42D1/00F42D3/04E21D1/00E21D1/06
Inventor杨仁树丁晨曦杨立云龚敏王德胜郑昌达
OwnerUNIV OF SCI & TECH BEIJING