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High-depth large-section medium-length hole one-time well forming method

A technology with large section and depth, which is applied in the field of one-shot well-forming of high-depth and large-section medium-deep holes, and one-shot construction of deep holes in underground mines cutting patios (shafts). Consumption cost and safety risk, effect of improving working conditions

Inactive Publication Date: 2021-01-12
BAOSTEEL GROUP XINJIANG BAYI IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for one-time well formation of medium-deep holes with high depth and large cross-section, which can not only solve the problem of cumbersome procedures in traditional methods, reduce material consumption costs and safety risks, avoid safety accidents, but also improve operating conditions and reduce labor. strength, and the driving speed and work efficiency have been greatly improved, which provides favorable conditions for the continuous and balanced production of mines

Method used

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Examples

Experimental program
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Embodiment 1

[0055] Example 1: The shape of the ore body is layered, irregular veins, and parallel side veinlets, inclined to NE, with a thickness of 6-7m and a segment height of 17m. According to the mining method and the relationship between the upper and lower layers, the first mining Layered, the sky well is designed at the end of the roadway along the vein, and the design height is 14m;

[0056] 1. The design height of the cutting well is 14m, the cross-sectional size is 3.2*4.2, and the total number of holes is 71, including 57 charging holes with a depth of 14m; 14 large-diameter hollow holes with a depth of 15m.

[0057] 2. After inspection and acceptance after construction, the average depth of the charging hole is 14.4m, and the average depth of the compensation hole is 15.3m.

[0058] 3. Install 1, 3, 5, 7 half-second nonel detonators in the center of the cutout, install 8 and 9 half-second nonel detonators in the auxiliary holes in turn, and install 10 half-second nonel detonat...

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Abstract

The invention belongs to the technical field of underground mine excavation, particularly relates to an underground mine cutting raise (vertical shaft) medium-length hole one-time well forming construction process, and particularly relates to a high-depth large-section medium-length hole one-time well forming method which can replace manual construction to cut raises. In process, constructor operates a drill jumbo in a gate way to construct upward vertical blast holes, explosive loading is also completed in the gate way, the operation space height is small, the roof risk is controllable, the gate way is used as a compensation space, delay blasting and one-time well forming are adopted, the construction efficiency is high, construction is easy, mechanical operation is achieved, the safety risk is small, and the labor intensity is low.

Description

technical field [0001] The invention relates to a one-time well forming method for medium-deep holes with high depth and large section. The invention belongs to the technical field of underground mine excavation, and specifically relates to the one-time well-forming construction technology of deep holes in underground mine cutting raised shafts (shafts), which can replace manual construction of cutting raised shafts. Background technique [0002] The cutting raised shaft is a vertical upward roadway excavated in order to have enough compensation space during the blasting when using the pillarless sub-level caving method for mining. At present, the construction technology of Mengku Iron Mine cutting patio is the common upward excavation method. The cutting patio is 2.2m wide, 3.5m long, and 10.5-14m high. At the working position, the horizontal round steel is used as a support beam on the anchor rods laid on the two walls along the length direction of the patio, and the mesh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D3/00E21F17/00
CPCE21D3/00E21F17/00
Inventor 韩鹏举侯正敏安秀俊
Owner BAOSTEEL GROUP XINJIANG BAYI IRON & STEEL
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