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A construction method of piercing cutting grooves through the brow line opening of steel bars in the chamber

A construction method and technology of cutting slots, which are applied in underground chambers, earthwork drilling, shaft equipment, etc., and can solve the difficulties of setting up platforms and charging charges in the middle and deep holes in the back row, hidden dangers of manual charging, and large cutting slot sections, etc. To avoid the difficulty of setting up the platform, ensure normal blasting, and reduce landfill

Active Publication Date: 2019-03-19
YUXI DAHONGSHAN MINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the recovery process of cutting groove blasting, when the blasting passes through the chamber, the blast pile will fill the chamber and often bury the middle and deep holes in the rear row, making it extremely difficult to set up platforms and charge charges in the middle and deep holes in the rear row
It also brings greater safety hazards to artificial charging
Moreover, the section of the cutting groove is relatively large, and the stability is relatively low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A construction method for piercing cutting grooves to pass through the brow line opening of steel bars in a chamber, comprising the following steps:

[0029] 1) Determine the construction cutting groove: select the piercing cutting groove as the transportation piercer and include at least one chamber for construction, and the piercing cutting groove is a three-core arch section;

[0030] 2) Determine the construction position of the reinforcement brow line opening: select the half-row position behind the current blasting position to start construction;

[0031] 3) Construction: For the arch construction anchors corresponding to the construction positions determined in step (2), construct a group of anchors at intervals of 1m along the arch length direction, each group has two anchors, and the distance between the two anchors in each group 150mm, the steel plate is fixedly connected to the group of anchor rods, and several groups of anchor rods together form the eyebrow ...

Embodiment 2

[0033] A construction method for piercing cutting grooves to pass through the brow line opening of steel bars in a chamber, comprising the following steps:

[0034] 1) Determine the construction cutting groove: select the piercing cutting groove as the transportation piercer and include at least one chamber for construction, and the piercing cutting groove is a three-core arch section;

[0035] 2) Determine the construction position of the reinforcement brow line opening: select the half-row position behind the current blasting position to start construction;

[0036] 3) Construction: For the arch construction anchors corresponding to the construction positions determined in step (2), construct a group of anchors at intervals of 1m along the arch length direction, and each group of anchors has two (the connection between the two anchors The line is perpendicular to the direction of the arch length), the distance between the two anchor rods of each group is 250mm, and the steel...

Embodiment 3

[0038] A construction method for piercing cutting grooves to pass through the brow line opening of steel bars in a chamber, comprising the following steps:

[0039] 1) Determine the construction cutting groove: select the vein cutting groove as the transportation piercing groove and at least include one chamber for construction, the piercing cutting groove is a three-heart arch section; the specification of the piercing cutting groove is Net width x net height: 3.4m x 3.3m, arch length 4.52m.

[0040] 2) Determine the construction position of the reinforcement brow line opening: select the position 0.5m after the current blasting position to start construction;

[0041] 3) Construction: For the arch construction anchors corresponding to the construction positions determined in step (2), construct a group of anchors at intervals of 1m along the arch length direction, each group has two anchors, and the distance between the two anchors in each group 200mm, the steel plate is we...

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PUM

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Abstract

The invention discloses a construction method for a transverse drift cutting groove to pass through a chamber rebar open wiring port. The construction method comprises the following steps that (1) a construction cutting groove is determined, wherein the transverse drift cutting groove which serves as a transporting transverse drift and at least comprises one chamber is selected for construction; (2) the rebar open wiring port construction position is determined, wherein construction is started from the position which is a half row behind the current blasting row position; (3) construction is carried out, wherein on the arch crown construction anchor rod corresponding to the construction position determined in the step (2), in the arch length direction, a set of anchor rod is constructed every 1 m, and two anchor rods exist in one set, the distance between the two anchor rods in one set is 200 mm, a steel plate is fixedly connected to the current set of the anchor rods, and the rebar open wiring port is jointly formed by the multiple sets of anchor rods. According to the construction method, through the transverse drift cutting groove serving as the transporting transverse drift andhaving many chambers, the rebar open wiring port is constructed according to actual conditions, the problem that medium and deep holes are prone to being embedded by blasting piles during blasting iswell solved, and the blasting safety and normal implementation are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of mining blasting, and in particular relates to a construction method for piercing a vein cutting groove to pass through the brow line opening of a steel bar in a chamber. Background technique [0002] Dahongshan iron ore is a low-sulfur phosphoric ore mixed with magnetic and hematite. The main metal minerals are magnetite and hematite. The main gangue minerals are quartz, followed by plagioclase and muscovite. The ore structure is mainly granular, fragmented, and vein-like, and the grains are intact. The ore is dominated by massive structures, less brecciated, disseminated, and porphyritic structures. Magnetite crystal grain size is relatively coarse, +0.1mm accounts for about 50%; hematite grain size is finer, -0.05mm exceeds 60%. [0003] Mining is the process of extracting ore from a block that has been mined and cut. The mining process directly affects the technical and economic indicators of the mi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D20/00E21D11/14
Inventor 赵灵君普绍云徐万寿刘明许翟思龙杨东峰赏克强陈平马文标
Owner YUXI DAHONGSHAN MINING