Rapid blasting groove broaching method suitable for different sectional heights

A kind of grooving and fast technology, which is used in blasting, earth-moving drilling, surface mining, etc., can solve the problems of low grooving efficiency, easy failure, low success rate, etc., and achieves high grooving efficiency, strong adaptability, and low cost. low effect

Active Publication Date: 2019-06-18
NANJING MEISHAN METALLURGY DEV
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AI Technical Summary

Problems solved by technology

The method of cutting the well and pulling the groove is to excavate the cutting well manually, and realize the groove with the help of the compensation space of the cutting well. This method has high cost, long cycle and low efficiency of the groove
The one-time blasting well-forming method is to directly pull through the upper layer to complete the trenching by blasting the well. This method is limited by the height of the blasting and is suitable for thin ore body trenching. At the same time, the success rate is not high and it is prone to failure
The wedge-shaped slotting method makes use of the compensation space provided by the roadway, and gradually raises the angle of the inclined blast hole to finally pull through the upper layer to complete the slotting. This method has high cost, long cycle, and low slotting efficiency, especially the segment height is relatively high The disadvantages are more obvious when

Method used

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  • Rapid blasting groove broaching method suitable for different sectional heights
  • Rapid blasting groove broaching method suitable for different sectional heights
  • Rapid blasting groove broaching method suitable for different sectional heights

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Embodiment 1

[0020] Embodiment 1: see Figure 1-Figure 5 , a rapid blasting slotting method suitable for different segment heights, the method includes the following steps: 1) design of the slotting hole, 2) precise positioning of the blasting hole construction, 3) reasonable charge structure selection, 4) reasonable Determination of segmental differential delay, 5) selection of reasonable blocking length, 6) judgment of slotting blasting effect, the steps 1) design of slotting blast holes are as follows, the core part adopts vertical hole slotting method, The position of the groove is arranged according to the scope of the groove, and multiple groups of upward vertical cutting holes are arranged to control the groove area. The adjacent cutting holes are independent of each other and affect each other. Each group of cutting holes is divided into charging holes and holes that provide compensation space. Empty holes, the first-blast charging holes mainly use the compensation space provided b...

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Abstract

The invention relates to a rapid blasting groove broaching method suitable for different sectional heights. The rapid blasting groove broaching method suitable for the different sectional heights is characterized by comprising the following steps of 1) designing a groove broaching blast hole; 2) accurately positioning the construction of the blast hole; 3) selecting a reasonable charging structure; 4) determining a reasonable subsection microsecond delay; 5) selecting a reasonable blockage length; and 6) judging the blasting effect of a broached groove. According to the scheme, aiming at the different sectional heights, the groove broaching efficiency is improved, the groove broaching is rapidly completed, the broached groove is directly connected with the upper layer through one-time blasting, the success rate of groove drawing broaching is ensured, and the secondary entering treatment fault is avoided.

Description

technical field [0001] The invention relates to a rapid blasting slotting method suitable for different section heights, and belongs to the technical field of underground medium and deep hole blasting. Background technique [0002] Segmental caving mining without pillars, slotting is the first process after the mining work enters a new level or panel, it forms a cutting slot at the end of the mining roadway, providing the initial free surface and blasting for mining blasting. Compensation space. There are various trenching methods used in various mines. Commonly used trenching methods include cutting raised well trenching, one-time blasting into well trenching and wedge-shaped trenching. The groove-cutting method of cutting the well is to excavate the well manually, and realize the grooving by means of the compensation space of the well. This method has high cost, long period and low efficiency of grooving. The one-time blasting well-forming method is to directly pull thro...

Claims

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Application Information

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IPC IPC(8): F42D1/00F42D3/04E21C41/22
Inventor 杨兵王连生杨潘磊邱海涛
Owner NANJING MEISHAN METALLURGY DEV
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