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Method for preparing flat stone by using alternating tensile stress to expand and fracture rock cracks

A technology of crack propagation and tensile stress, applied in the direction of stone processing tools, stone processing equipment, manufacturing tools, etc., can solve the problems affecting the scope of application, and achieve the effect of low production cost, abundant resources, and reduced production cost

Inactive Publication Date: 2016-04-13
李衍远
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this improved method is implemented on the basis of hydraulic fracturing. There is always the pressure of high-pressure water in the process of crack source expansion and formation. In order to maintain the high-pressure water pressure in the crack source, the degree of natural crack development in the rock There are very high requirements, which to a certain extent affect the scope of application of the technical solution with the patent number 200710028630.x

Method used

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  • Method for preparing flat stone by using alternating tensile stress to expand and fracture rock cracks
  • Method for preparing flat stone by using alternating tensile stress to expand and fracture rock cracks
  • Method for preparing flat stone by using alternating tensile stress to expand and fracture rock cracks

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Embodiment 1

[0033] like figure 1 As shown, the rock mass 1 that is suitable for use as stone is selected. Generally, the top of the rock mass is relatively small, and the horizontal cross-sectional area of ​​the rock mass is larger as it goes downward. Determine a work area at the top to form the first horizontal fracture surface, generally about 20×30 square meters. The rock above the first fracture surface is an irregular rock at the top of the rock mass. After removing the rock, the exposed fracture surface is A preliminary plane. The further down the mining, the larger the horizontal fracture surface. like figure 1 As shown, the horizontal fracture surface to reach 100×100 square meters is taken as an example. During processing, the working plane is first formed: the formed flat stone is divided and transported away to expose the working plane forming the next horizontal fracture surface.

[0034] On the working plane, according to the hardness of the rock mass, an approximately r...

Embodiment 2

[0044] In this embodiment, vertical alternating tensile stress is used to initiate and propagate cracks. There are two points of difference between this embodiment and embodiment 1: the one is that this embodiment forms as image 3 In the shown crack groove, the alternate tensile stress hole and the alternate tensile stress generator used in Embodiment 1 are cancelled. Second, the embodiment forms image 3 After the crack groove shown, on the outer side of the outer ring crack groove at both ends of the crack groove, a motor vehicle equipped with a percussion hammer is arranged according to a distance of 4-7 meters. The end of the percussion hammer is made of wood, and the hammer weight is 50-300 kg. Make a vertical reciprocating motion, the number of impacts per minute is 20-50 times, impact the rock above the crack, and gradually push the impact point forward as the crack expands, so that the crack forms a fracture surface.

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Abstract

The invention discloses a method for making rock cracks grow and fracture through alternating tensile stress to manufacture slab stone. The method includes the steps that first, a rock mass suitable for being used as stone is selected, and the top face of the rock mass is machined into a preliminary plane; then, quadrangular crack grooves and additional crack grooves in quadrangles are formed in one horizontal plane in the rock mass, a crack initiation area is formed in the area where the crack grooves intersect, a series of alternating tensile stress holes are formed in a preset fracture surface, and the interval between every two adjacent alternating tensile stress holes is between 10 m to 30 m; an alternating tensile stress generator is arranged in each alternating tensile stress hole, and the closed cracks continue to expand and fracture under the action of horizontal alternating tensile stress to form a smooth horizontal fracture surface. The method is used for a separation procedure for exploiting rock on a large scale so as to form separated bodies as the slab stone with large area, the slab stone is partitioned into large stone with different purposes, stone cost is low, and the method has a wide stone application range and cost advantages compared with the prior art.

Description

technical field [0001] The invention relates to a non-cutting separation technology for rocks, in particular to a method for preparing slab stones by using alternating tensile stress to expand and fracture rock cracks. The method is suitable for the separation of rock masses and can form slab stones with a large area after separation. Background technique [0002] The applicant applied for a Chinese invention patent in 2007, a method for preparing slab stones by using continuous expansion and fracture of rock cracks. The patent number is 200710028630.x, and the application has been authorized. The patented method includes the following steps: (1) rock mass selection and preliminary processing: select a rock mass that has no natural cracks and is suitable for use as a stone, and process it into a preliminary plane on the top surface of the rock mass; (2) crack grooves in the rock mass The formation of: on the plane that step (1) forms, according to rock mass hardness, determi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28D1/32
Inventor 李衍远
Owner 李衍远
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