Relaxation type blasting method and protection cover structure for blasting

Abstract

The present invention relates to a structure of slackening type blasting method and mat, which makes terrane of the blast area checking and slackening from mother rock by cursting force. The blasting method comprises a step of boring spaced blast holes, blasting lead connecting step of putting explosive into the holes and connecting the blasting lead; a blasting shield seting step, which set a steel plate member and an elastic member, and seting a blasting shield by welding a weight reinforcing member on the steel plate member; a blasting step for blasting an explosive.

Description

technical field [0001] The present invention relates to a relaxation blasting method and a blasting shield structure, which are used to dig out a part of the rock slope formed by the rock layer on one side or both sides or dig out the middle of the rock layer without free surface when opening a road or widening the road a part of. Background technique [0002] Generally, in the construction of opening or widening roads such as mountainous roads or coastal roads sandwiching mountainous terrain, it is inevitable to encounter situations where slopes of rock formations need to be opened. In most road constructions, it is necessary to prevent accidents and injuries to driving vehicles. On the other hand, heavy machinery such as large crushers and excavators is used to excavate the inclined surface of the rock formation. However, if the inclined rock formation is a hard rock formation with high strength, the excavation efficiency of the mechanical excavation work performed by heav...

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Problems solved by technology

[0004] However, the above-mentioned traditional mobile blasting method must use a large amount of explosives in order to completely separate the part of the rock formation to be cut from the parent rock to increase the blasting force, thereby increasing the blasting noise. The blasting site is far away, and the vibration caused by the blasting force will be transmitted far

In order to reduce the blasting noise and prevent the broken rocks from flying randomly, a rubber cover or straw bag is laid on the surface of the rock formation before blasting. To achieve the effect of reducing blasting noise and vibration, it is difficult to use the blasting method if there are people living within 100m from the construction site. In addition, the traffic on the nearby roads must be cut off.

[0005] Therefore, when it is necessary to cut off a certain width of hard rock formation at the construction site of the opening or widening of mountain roads or coastal roads, if there are residential or animal husbandry facilities within 100m from the construction site, public facilities such as power supply fields, and close When there are vehicles or trains running on roads or railways, once the mobile blasting method is used, the blasting noise and vibration generated during rock blasting will of course alarm the nearby residents, and will also cause gravel to fly into the residence, and the blasting vibration will cause construction damage. The shaking and the sinking of the site, the drivers on the vehicles driving on the road near the construction site may affect their safe driving due to blasting and eventually lead to accidents. In addition, the drivers and passengers on the trains running on the railway will also be injured. , the blasting vibration will cause derailment accidents of the running train, so when using the traditional blasting method, the above-mentioned matters must be considered to greatly limit its use

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