Rock pre-splitting method for mine rock roadway driving face

A technology for excavating working face and rock, applied in surface mining, earthwork drilling, underground mining, etc., can solve the problems of high risk and poor environmental protection, and achieve the effect of improving efficiency, improving effect, improving environmental protection and safety

Active Publication Date: 2020-07-31
西安闪光能源科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for pre-cracking rocks in the working face of mine rock roadway, so as to solve the problems of high risk and poor environmental protection in the current use of explosives to pre-crack rocks

Method used

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  • Rock pre-splitting method for mine rock roadway driving face
  • Rock pre-splitting method for mine rock roadway driving face
  • Rock pre-splitting method for mine rock roadway driving face

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Embodiment Construction

[0032] Below in conjunction with accompanying drawing and specific embodiment the content of the present invention is described in further detail:

[0033] A rock pre-splitting method in a mine rock roadway driving face, comprising an energy converter 11 and an orifice device 12 .

[0034] Such as image 3 , Figure 4 As shown, the energy converter 11 includes a ground electrode 1 , a metal wire 2 , a high voltage electrode 3 , an insulating support 4 , a casing 5 , a cable interface 6 and a shock wave directional reflective arc plate 13 .

[0035] The shell 5 is a cylindrical structure, and its interior is hollow. The high-voltage electrode 3 is fixed on the end of the shell 5 through the insulating support 4. The cable at the end of the cable interface 6 passes through the body of the shell 5, the insulating support 4 and the rear end of the high-voltage electrode 3. connection, the ground electrode 1 is connected to the front end of the shell 5 through two shock wave dire...

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PUM

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Abstract

The invention relates to a rock pre-splitting method for a mine rock roadway driving working face, and aims to solve the problems of high risk and poor environmental protection property when explosives are used for pre-splitting rocks at present. The rock presplitting method for the mine rock roadway driving face comprises the following steps of S1, setting drilling positions and number of rocks in a rock roadway, drilling boreholes in the rocks, wherein the boreholes are formed in two sides and the top of the rocks in the roadway, and axes of the boreholes are parallel to an extending direction of the rock roadway; S2, installing an orifice device in each borehole, and filling the boreholes with water; S3, connecting an energy converter with a pulse power driving source, and placing the energy converter in the borehole; and S4, starting a pulse power driving source to discharge electricity to the energy converter, wherein the rock is cracked by shock waves generated by the energy converter, the strength of the shock wave is 280 to 299 MPa, and cracks generated after shock wave operation is performed on the multiple boreholes form a crack zone, that is, the pre-splitting of the rock in the rock roadway is completed.

Description

technical field [0001] The invention belongs to the technical field of mine engineering, and in particular relates to a method for pre-cracking rock in a mine rock roadway excavation working face. Background technique [0002] Mineral resources are the material basis of industrialization. my country's primary energy consumption mainly depends on coal supply, and its long-term proportion reaches more than 60%, which is the main pillar of my country's industrialization development. In my country's coal production, about 12,000 kilometers of roadways are dug underground every year, of which 9,000 kilometers are coal roadways and 3,000 kilometers are rock roadways (rock roadways). Explosive blasting is currently the main way to excavate rock roadways, but this method has a large amount of work, resulting in slow excavation speed, high cost, and certain hidden dangers. Explosives and other pyrotechnics have great technical advantages in rock tunnel excavation, but the shock wav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/18E21C37/14E21C37/18
CPCE21C41/18E21C37/18E21C37/14
Inventor 刘美娟张硕张永民汤俊萍
Owner 西安闪光能源科技有限公司
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