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Cutting method combining deep hole cutting and small well cutting

A cutting method and technology for cutting wells, which are applied in earth drilling, surface mining, blasting, etc., can solve the problems of high cost of chamber blasting, difficulty in cutting chamber construction, and long construction time, and achieve enhanced blasting success rate, strong The effect of promoting application value and reducing cutting cost

Inactive Publication Date: 2013-02-27
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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AI Technical Summary

Problems solved by technology

Because this cutting method requires the construction of cutting tunnels and cutting chambers, the amount of mining and cutting is large, the construction of cutting chambers is difficult, the working environment is harsh, the construction time is long, and the cost of chamber blasting is high, and the damage caused by blasting is relatively large. Therefore, it is beneficial to improve labor production efficiency and reduce ore mining costs by researching and finding reasonable new cutting methods and straightening out the relationship between cutting work and mining work.

Method used

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  • Cutting method combining deep hole cutting and small well cutting
  • Cutting method combining deep hole cutting and small well cutting

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Embodiment Construction

[0016] Below in the Huashugou mining area, the cutting method and test effect of the combination of cutting deep holes and cutting small wells of the present invention are described in detail.

[0017] The Huashugou mining area of ​​Jingtieshan Mine is divided into seven ore belts, namely, I ore belt, II ore belt, III ore belt, IV ore belt, V ore belt, VI ore belt and VII ore belt. The segmental caving method without pillars is adopted, and the mining structure parameters are segmental height of 15m and approach spacing of 12m. In the Huashugou mining area I-II ore body and V ore body, the test work of cutting deep hole and cutting small shaft combined with trenching was carried out.

[0018] 1. Cutting method combining deep hole cutting and small well cutting

[0019] (1) Arrange the position of the cutting wells in the cutting roadway: generally one cutting well is arranged at both ends and in the middle of the cutting roadway, and the distance between the cutting wells is ...

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Abstract

The present invention provides a cutting method combining deep hole cutting and small well cutting, and belongs to the technical field of ore belt mining. The invention adopts a cutting process combining deep hole cutting and small well cutting, not only cancels the roadway cutting, simplifies the cutting process, and reduces cutting cost significantly, but also provides an experimental basis to realize cutting of deep hole cutting blasting, and has strong promotion and application value. Medium-length holes on both sides of the small well are cut by dual radiation center construction. Taking the small well as a free surface, delay blasting is performed from small well center to the two sides to realize medium-length hole blasting pull trough without roadway cutting, and blasting initial free surfaces are created for follow-up blasting of medium-length hole breaking ground. The long axis direction of a cutting well is perpendicular to the row surface of the cutting deep hole, and the length direction is greater than the row spacing of the cutting deep hole, therefore the deep hole blasting gets the maximum free surface, greatly enhancing the blasting success rate which can reach 100%.

Description

technical field [0001] The invention belongs to the technical field of ore belt mining, and relates to a trough cutting method of a bottomless pillar sub-caving method, in particular to a cutting method combining deep hole cutting and small well cutting. Background technique [0002] The pillarless segmented caving method has outstanding advantages such as high strength, high efficiency, low cost, simple process, high degree of mechanization, and safe production, and has been widely used in well mining and mine mining. The cutting groove construction is the most important part in the mining process of well mining mines, and it is also an important subject of research in the production of various mines. The cutting process of traditional ore mining adopts the cutting chamber or the cutting method combining deep hole and cutting chamber. Because this cutting method requires the construction of cutting tunnels and cutting chambers, the amount of mining and cutting is large, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16F42D3/00
Inventor 陈永祺雷永顺程国华
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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