Construction method of blasthole stemming structure for drilling blasting and concrete block structure for method

A construction method and blast hole blocking technology, which are applied in the field of concrete block structures, can solve the problems of unsatisfactory blocking effect and difficulty in obtaining, and achieve the effects of facilitating on-site operation, prolonging action time, and being easy to obtain.

Inactive Publication Date: 2016-04-27
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the problem that the blocking effect of the existing blasting plugging structure is not ideal or difficult t

Method used

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  • Construction method of blasthole stemming structure for drilling blasting and concrete block structure for method
  • Construction method of blasthole stemming structure for drilling blasting and concrete block structure for method
  • Construction method of blasthole stemming structure for drilling blasting and concrete block structure for method

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. In the figure, 1 is a rock slag filling body, 2 is a column-cone reinforced concrete block, 3 is a steel bar in a column-cone body, 4 is a buffer section, and 5 is an air layer.

[0024] Such as figure 1 As shown, the construction method adopts the following steps:

[0025] Step 1, according to the hole diameter of the hole to be plugged and the length of the plugging section, select a cone-shaped concrete block 2 with a cone shape at the other end and a column-cone concrete block 2 with built-in steel bars 3 of appropriate size, and collect rocks from the construction site. The slag is sieved, and the particles with a particle size of 0.1 cm to 2.0 cm are taken.

[0026] Step 2, after the charge of the blast hole is finished, put the buffer material 4 into the blast hole, and then place the column-conical reinforced concrete block 2 in step 1 ...

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Abstract

The invention relates to a construction method of a blasthole stemming structure for drilling blasting and a concrete block structure for the method. The blasthole stemming structure comprises a cylindrical-conical reinforcement built-in concrete block structure, a buffer section and a rock ballast filling body meeting certain grain size requirements, wherein one end of the cylindrical-conical reinforcement built-in concrete block structure is conical while the other end is cylindrical. After shock waves formed after explosion of a blasting cartridge pass the buffer section, concrete blocks on the blocking section generate velocity of movement towards the orifice direction under the action of the buffer section, the rock ballast filling body is squeezed and generates dislocation due to the wedging effect of the upper cone during movement so as to be squeezed and compacted, and bonding power and friction force among particles increase sharply. Meanwhile, the rock ballast filling body generates lateral expansion, however, the squeezed and compacted rock ballast blocks the cylindrical-conical reinforcement built-in concrete block from rushing outwards due to the constraint effect of the hole wall, so that detonation gas is effectively prevented from escaping from the blasthole, acting time of the detonation gas on rock is prolonged, explosive energy is fully utilized, and blasting effect is enhanced.

Description

technical field [0001] The invention belongs to the technical field of engineering blasting, can be used in rock mass blasting construction in the fields of mines, water conservancy and hydropower, transportation, etc., and relates to a construction method of a blast hole blocking structure used in drilling blasting and a concrete block structure used in the method. Background technique [0002] With the improvement of engineering technology in our country, engineering blasting technology has developed rapidly in water conservancy, railway, mining and other projects, and blast hole plugging is an important link in drilling and blasting construction. Theory and practice show that although the impact of blast hole plugging and non-blocking on the peak value of the blast shock wave is not obvious, the decay rate of blast hole pressure is relatively slow after plugging, thus prolonging the duration of blast hole pressure and increasing the energy of explosives. utilization rate....

Claims

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Application Information

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IPC IPC(8): F42D1/08
CPCF42D1/08
Inventor 陈明邓珂卢文波严鹏王高辉
Owner WUHAN UNIV
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