Hydraulic fracturing rock breaking method and system

Abstract

The invention discloses a hydraulic fracturing rock breaking method. The method comprises the steps that a plurality of holes are formed in the position requiring rock breaking in a mine in advance, a pressurizing device is used for pressurizing water to obtain high-pressure water, an outlet of the pressurizing device communicates with the interiors of the holes through a high-pressure pipe, a sealing device is arranged at the joint of the high-pressure pipe and the holes, the high-pressure water is injected into the holes, the water pressure of the high-pressure water is continuously increased until the pressure in the hole exceeds the highest crack extension pressure of the rock mass, and the rock mass is broken. Therefore, according to the hydraulic fracturing rock breaking method, dust and vibration are avoided in the rock breaking process, and environmental pollution is avoided. The invention further discloses a hydraulic fracturing rock breaking system.

Description

technical field [0001] The invention relates to the field of rock breaking in mines, in particular to a hydraulic fracturing rock breaking method and a hydraulic fracturing rock breaking system. Background technique [0002] In the process of rock mining in mines, rocks need to be crushed and stripped. At present, the commonly used method is to use explosive blasting. However, the blasting method has problems such as difficult to control the amount of charge, blind shots, etc., and there are vibrations, flying stones, etc. in the process. Safety and environmental protection issues such as dust and noise, and explosive blasting cannot control the direction of rock mass crushing. [0003] With the strengthening of control and use restrictions on blasting mining, the technology of rock breaking using physical methods is widely used. Commonly used physical blasting methods are carbon dioxide gas crushing, hydraulic splitting, expansion agent splitting, physical cutting, water j...

AI Technical Summary

Problems solved by technology

Commonly used physical blasting methods are carbon dioxide gas crushing, hydraulic splitting, expansion agent splitting, physical cutting, water jet cutting, etc., but the above physical crushing methods are all small volume crushing methods except carbon dioxide gas crushing. The disadvantages of low operating efficiency and generally high operating costs

As for the crushing of carbon dioxide gas, because its blasting mechanism relies on high temperature breakdown of the safety film to instantly gasify carbon dioxide and generate gas impact force to crush the ore, there are also more safety risks.

Moreover, due to the cumbersome operations such as filling, wiring, and hole sealing, which are prone to errors, the operating efficiency is not high; the expansion rock breaking technology can effectively control the blasting range, and the rock mass will be swollen and broken through the continuous expansion of the expansion agent. A large amount of expansion agent is required, the cost is high, and there is still a problem of disposal of the used expansion agent. Secondly, because the expansion agent is used to expand the rock, the deformation of the expansion agent is limited, and the expected expansion effect is often not achieved. The reaction generally takes several hours, and the efficiency is low

Similarly, the use of hydraulic splitters also has problems such as low efficiency and serious equipment wear. When it is necessary to control the direction of rock mass rupture under special circumstances, the limitations of explosive blasting technology are more prominent.

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