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The fine blasting method of downward fan-shaped deep holes instead of vertical deep holes

A fan-shaped deep hole and vertical deep hole technology, which is applied in the field of prospecting, can solve the problems of low rock drilling efficiency and slow speed, and achieve the effects of reducing the unit consumption of explosives, accurate charging amount, and optimizing blasting parameters.

Active Publication Date: 2020-07-03
安徽马钢张庄矿业有限责任公司
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  • Application Information

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Problems solved by technology

The plane projected area of ​​the drilling volume of the rock drilling chamber accounts for 85% of the area of ​​the mining room, and the actual drilling volume of the down-the-hole drilling rig used for the vertically downward parallel deep hole is 40 meters. The speed of the 140-meter class is slow, and the rock drilling efficiency is low

Method used

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  • The fine blasting method of downward fan-shaped deep holes instead of vertical deep holes
  • The fine blasting method of downward fan-shaped deep holes instead of vertical deep holes
  • The fine blasting method of downward fan-shaped deep holes instead of vertical deep holes

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Embodiment

[0041] The method for refined blasting of downward fan-shaped deep holes instead of vertical deep holes is characterized in that it includes the following steps,

[0042] Step 1, back mining rock drilling:

[0043] The mining method mainly adopts the mining method of large-diameter deep hole stage emptying and subsequent filling. The height of the mine room is 60m, the width is between 15-20m, and the length is the thickness of the ore body. Car, drilling vertical deep holes downward in the rock drilling chamber of the stope, the diameter of the blast hole is Φ165mm, the depth of the blast hole is about 41m, the parameter of the hole network is 3m*3m; the height of the bottom is 15m, and the Simba1254 rock drilling rig is used, and the hole diameter is 76mm , the row distance is 1.8-2m, and the hole bottom distance is 2-2.5m;

[0044] Step 2, mining design optimization:

[0045] A rock-drilling roadway with a width*height of 5m*4m is designed at the horizontal boundary of th...

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Abstract

The invention provides a method for achieving fine blasting by replacing a vertical deep hole with a downward fan-shaped deep hole, and relates to the technical field of exploration. The method is characterized by comprising the following steps of stoping and rock drilling, optimization of stoping design, design of a stoping process for the downward fan-shaped deep hole, determination of blastingparameters, priming circuit connection, perforating deviation correction, determination of explosive charging requirements, and explosive charging and blasting. The method is reasonable, the workloadcan be reduced, the equipment utilization rate can be increased, and the working pace is quickened.

Description

technical field [0001] The invention relates to the technical field of prospecting, in particular to a fine blasting method for downward fan-shaped deep holes instead of vertical deep holes. Background technique [0002] At present, due to the continuous and sharp drop in iron ore prices, the development of domestic iron ore enterprises is facing severe challenges. The deterioration of resource conditions has made mining more difficult, and social and economic development has also put forward new requirements for mine development. Therefore, in order to cope with changes in the industry situation and adapt to the requirements of the times, it is necessary to continuously research and develop mining technology, and to reduce costs and increase efficiency through the application of new technologies and technological transformation to improve the competitiveness of enterprises. [0003] Zhangzhuang Mine is currently mining by the vertical deep hole stage mine method. The width ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D1/00F42D3/04
CPCF42D1/00F42D3/04
Inventor 王玉富张华陈五九王邦策余剑张强高义军李王兵田奇志周林敖翔
Owner 安徽马钢张庄矿业有限责任公司
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