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Roadway tunneling efficient rock breaking method based on ultrasonic vibration pre-slotting

An ultrasonic and rock-breaking technology, which is applied in the field of high-efficiency rock-breaking in roadway excavation based on ultrasonic vibration pre-cutting, can solve problems such as no ultrasonic waves, and achieve the effects of improving rock-breaking efficiency, high footage, and saving consumable materials

Active Publication Date: 2021-04-06
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Ultrasound is used in many industrial fields due to its advantages of high vibration frequency, good directionality, and energy concentration, and the effect is remarkable, but no ultrasonic wave has been used in rock engineering construction

Method used

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  • Roadway tunneling efficient rock breaking method based on ultrasonic vibration pre-slotting
  • Roadway tunneling efficient rock breaking method based on ultrasonic vibration pre-slotting
  • Roadway tunneling efficient rock breaking method based on ultrasonic vibration pre-slotting

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Embodiment Construction

[0033] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0034] Select a tunneling face in a certain mine for construction. The specific construction method is as follows:

[0035] The first step is to design and plan the cutting range area and prepare ultrasonic vibration equipment;

[0036] In the second step, because the excavation rock formation is relatively hard, the design cutting depth is required to be 2.2 m, so the power of the ultrasonic generator 54 is adjusted to 40 kW, the ultrasonic frequency is 25 kHz, and the ultrasonic vibration time within one footage is set to 10 minutes, and the amplitude is selected. Amplify the horn 51 with an amplification factor of 3:1, and then perform ultrasonic vibration on the cutting range area 1; at the same time, use a common drilling machine to drill the peripheral holes 23~48;

[0037] In the third step, as the range and depth of the cutout increase...

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Abstract

The invention belongs to the field of roadway tunneling rock efficient breaking, and particularly relates to a roadway tunneling efficient rock breaking method based on ultrasonic vibration pre-slotting. In order to solve the problem of efficient breaking of hard rock, during hard rock roadway tunneling, the advantages of good ultrasonic directivity, energy concentration and the like are utilized; firstly, ultrasonic vibration equipment is adopted to vibrate and impact a rock mass in a target area, internal cracks are promoted to rapidly expand and rapidly reach breaking, and pre-slotting is achieved; and in combination with optimized arrangement of auxiliary holes and peripheral holes, the efficient breaking of rock is achieved. The method provided by the invention has the advantages that the slotting range and depth can be controlled by adjusting the ultrasonic frequency and power; the time of work procedures such as hole drilling and explosive charging can be effectively reduced; explosives are saved; the tunneling cost is reduced; and the method can be widely applied to rapid tunneling of roadways in hard rock engineering.

Description

technical field [0001] The invention relates to the field of engineering construction such as high-efficiency rock crushing and fast roadway excavation, and specifically relates to an efficient rock-breaking method for roadway excavation based on ultrasonic vibration pre-cutting. Background technique [0002] With the increase of mining intensity, coal mines gradually enter into deep mining. Underground rock engineering construction generally faces problems such as hard rock crushing, low drilling efficiency, slow hole forming speed, and large loss of equipment and materials. The high efficiency of rock, especially hard rock Breaking has a great influence on the construction progress. In view of the problems and requirements faced by hard rock breaking and rapid excavation, it is particularly urgent and important to invent new rock breaking methods. [0003] At present, most of the excavation by drilling and blasting still uses explosives to blast rocks for excavation. When ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D9/10E21C37/20F42D3/04
CPCE21D9/006E21D9/10E21D9/1066E21C37/20F42D3/04
Inventor 王旭锋常泽超张东升张炜李翔宇王聪王纪尧
Owner CHINA UNIV OF MINING & TECH
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