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Blasting mining method for rock formation

A rock formation and rock breaking technology, which is applied in the field of rock mining, can solve the problems of low mining efficiency, rock formation loosening and fragmentation, etc., and achieve the effects of high mining efficiency, large pushing stroke and low operating cost

Inactive Publication Date: 2019-01-15
CHENGDU LIESHIZHE ROCK BREAKING TECH LLC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved and the technical task proposed by the present invention are to improve the existing technology and provide a ditching device to solve the problem that the rock formation breaking method in the current technology is difficult to effectively loosen and break the rock formation, and the breaking efficiency is low.

Method used

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  • Blasting mining method for rock formation

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Embodiment 1

[0047] A rock formation foundation pit with a total volume of 1 million square meters, an area of ​​100,000 square meters, a length of 500 meters, a width of 200 meters, and a rock formation thickness of about 10 meters. According to preliminary investigations, the rock formation is hard and has many cracks. The rock blocks are tightly attached to each other, and the middle part of the rock layer may be partially hollow or mud-filled, and the volume of this part should be within 30,000 square meters. Now according to the above construction site conditions, the specific rock formation mining method is carried out in the following manner:

[0048] Such as figure 1 As shown, the sidelines of the rock foundation pit are A, B, C, and D respectively, the length of A line and C line is 200 meters, the length of B and D line is 500 meters, and 19 grooves are set in the foundation pit. The trenches are parallel to Line A and Line C, with a length of nearly 200 meters. They are numbere...

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Abstract

The invention discloses a blasting mining method for a rock formation. The blasting mining method comprises the following steps: excavating a trench in a rock formation according to the preset direction, width and depth of the trench; and setting a plurality of rock blasting positions at intervals along the length direction of the trench, setting a plurality of pushing points at the rock blastingpositions at intervals along the depth direction of the trench, and pushing and expanding two side walls of the trench by using a pushing device from the bottom pushing point to the top so as to allowthe rock formation to loose or rupture. The blasting mining method for the rock formation in the invention employs a trenching device for excavating a trench in a hard rock formation and then pushesand expands the trench so as to allow the rock formation to have sufficient relative displacement; the pushing force of the pushing device is large, and a pushing stroke is large; an expansion force is applied to the interior of rock so as to effectively achieve the effects of cracking and breaking of the rock; and the blasting mining efficiency of the rock formation is high, and operation cost islow.

Description

technical field [0001] The invention relates to the technical field of rock mining, in particular to a rock formation mining method. Background technique [0002] In the basic construction and mining operations of construction sites, blasting and mechanical breaking are generally used for rock formations with high hardness. The blasting method is low in cost and high in efficiency, but it is dangerous, only if the safety requirements are not It is adopted in very high places; the safety of mechanical breaking method is high, but the cost is also high, and it is mainly used in places with high requirements for safety and civilized construction. Traditional mechanical crushing includes breaking hammer and rock breaker, etc., such as the rock breaking device described in patent No. zl92206900x and zl96205020.2, usually drills holes in hard rock, then inserts a rock breaker into the hole, and hydraulically inserts The cross-section of the rock is widened, thereby cracking the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C37/00
Inventor 凌杰
Owner CHENGDU LIESHIZHE ROCK BREAKING TECH LLC
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