A method of rock pre-splitting in 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: 2022-03-11
西安闪光能源科技有限公司
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[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
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[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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The invention relates to a method for pre-cracking rocks in a mine rock roadway excavation working face, which aims to solve the problems of high risk and poor environmental protection in the current use of explosives to pre-crack rocks. The rock pre-cracking method of the mine rock roadway driving face includes the following steps: S1, setting the drilling position and quantity of the rock in the rock roadway, drilling holes on the rock, and the drill holes are along the two sides of the rock in the roadway and The top is set, the axis of the drilling is parallel to the extension direction of the rock road; S2, install the orifice device in each drilling, and then fill the drilling with water; S3, connect the energy converter with the pulse power driving source; The energy converter is placed in the borehole; S4, start the pulse power drive source to discharge to the energy converter, and the shock wave generated by the energy converter will crack the rock; the intensity of the shock wave is 280‑299MPa; The cracks produced after the shock wave operation form the crack zone, which means the pre-cracking 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...
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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