Method of Oriented Top Cutting of Instantaneous Expansion Cracker on Single Crack

A technology of bursting and roof cutting, which is used in surface mining, earth-moving drilling, underground mining, etc. It can solve the problem that it is difficult to cut rocks with high strength, the danger of explosive blasting and roof cutting is high, and the reaction time of static crushing agent is long. and other problems, to achieve the effect of saving bursting time, fast bursting speed, and avoiding safety accidents

Active Publication Date: 2021-04-16
何满潮
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  • Abstract
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  • Application Information

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Problems solved by technology

The existing technology center mainly adopts explosive energy-concentrated blasting technology and static breaking agent directional top-cutting technology, but the explosive blasting of explosive explosive-energy-concentrated blasting technology is more dangerous and the approval procedures are complicated; the static breaking agent directional top-cutting technology is adopted , the reaction time of the static breaking agent is long, and the static breaking agent with the fastest reaction at present also needs more than four hours. The expansion force of the static breaking agent is small, and it is difficult to cut rocks with high strength, and it is rarely used on site. static breaker topping

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  • Method of Oriented Top Cutting of Instantaneous Expansion Cracker on Single Crack
  • Method of Oriented Top Cutting of Instantaneous Expansion Cracker on Single Crack
  • Method of Oriented Top Cutting of Instantaneous Expansion Cracker on Single Crack

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Embodiment Construction

[0041] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0042] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification only for convenience, for example, according to the description in the accompanying drawings directions for the example described above. It will be appreciated that if the illustrated device is turned over so...

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Abstract

The disclosure provides a method for directional top-cutting of a single-crack surface instantaneous expander, and relates to the field of mining technology. The expander has a tubular structure and is provided with a plurality of side-by-side energy gathering holes along its axial direction. The method includes: forming a plurality of installation holes arranged side by side along a preset direction in the body to be split according to a preset angle; Install at least one expander in each installation hole, each energy gathering hole faces the surface to be cracked, and each expander in each installation hole is connected by a lead wire; Expand each expansion agent in each expansion device; detect and calculate the kerf rate of each installation hole, and complete the top cutting when the kerf rate is within the preset range. The directional top-cutting method of the present disclosure can increase the rock-breaking speed and improve mining safety.

Description

technical field [0001] The present disclosure relates to the technical field of mining, in particular, to a method for directional top-cutting of a single-crack surface instantaneous expander. Background technique [0002] With the rapid development of the economy, people's demand for mineral resources is increasing, and the safe and stable mining of coal resources is particularly important. [0003] When coal is mined in self-forming lanes without coal pillars, roof pre-splitting is the core technology of coal mining in this process, that is, a crack surface needs to be directional cut in the roof rock mass. The existing technology center mainly adopts explosive energy-concentrated blasting technology and static breaking agent directional top-cutting technology, but the explosive blasting of explosive explosive-energy-concentrated blasting technology is more dangerous and the approval procedures are complicated; the static breaking agent directional top-cutting technology i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/18E21C37/06
CPCE21C37/06E21C41/18
Inventor 何满潮张权王炯郭志飚郭山
Owner 何满潮
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