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Safe and rapid tunneling process for high-outburst mine coal roadway

A technology for mines and coal roadways, which is applied in the field of safe and rapid excavation of coal roadways in high outburst mines, can solve problems such as gas outburst, and achieve the effects of improving production efficiency, saving supporting materials, and improving blasting effects.

Inactive Publication Date: 2010-07-07
SHANXI JINCHENG ANTHRACITE COAL MINING GRP CO LTD
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Problems solved by technology

[0003] In order to solve the problem of how to avoid gas outburst during the excavation process of high gas mines, the present invention provides a safe and rapid excavation process for coal roadways in high outburst mines

Method used

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  • Safe and rapid tunneling process for high-outburst mine coal roadway
  • Safe and rapid tunneling process for high-outburst mine coal roadway
  • Safe and rapid tunneling process for high-outburst mine coal roadway

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Embodiment Construction

[0018] A safe and rapid excavation process for coal lanes in high outburst mines. The steps are: coal body prediction by bench drilling rig, construction of blasthole by bench drilling machine, charging and blasting, waiting for 30mim after blasting, entering the working face unit to discharge coal, bench drilling machine supporting, and the next cycle In the process, the blasting hole adopts the straight-hole cutting method of diamond-shaped cutting, and two large-diameter hollow holes are constructed in the middle of the diamond-shaped hole. The blasting cycle is controlled between 4m-6m. The blastholes are controlled to be detonated in groups according to the predetermined sequence. Before the detonation, the personnel withdraw from a safe distance and hide in the explosion-proof mobile refuge chamber vehicle. Bench drilling rig is a kind of commonly used equipment in coal mines, which has the functions of drilling and supporting.

[0019] Rhombus straight eye cut such as ...

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Abstract

The invention relates to a mine coal roadway tunneling technology, in particular to a safe and rapid tunneling process for a high-outburst mine coal roadway, aiming at solving the problem how to avoid gas outburst in the tunneling process of a highly-gassy mine. The safe and rapid tunneling process comprises the following steps of: carrying out coal body forecasting by using a platform drilling machine, charging blastholes of the platform drilling machine and detonating, waiting for 30min after the detonating, entering a working face unit for outputting coal, supporting the platform drilling machine, entering the next circular working procedure, wherein the detonated blastholes adopt a diamond-cutting cylinder cut method, two large-diameter hollow holes are arranged at the middle part of a diamond cuthole, the circular detonation is controlled within 4m-6m, explosives are detonated at a millisecond time interval by utilizing a millisecond detonator, the blastholes are controlled to detonate successively according to a preset sequence, and the personnel withdraws to reach a safety distance before detonation and hides an anti-explosion movable refuge chamber vehicle.

Description

technical field [0001] The invention relates to a tunneling technology for coal lanes in mines, in particular to a safe and rapid tunneling technology for coal lanes in high-outburst mines. Background technique [0002] Coal and gas outburst is an extremely complex dynamic phenomenon in coal mines. It can suddenly eject a large amount of gas and crushed coal from the coal body to the roadway in a short period of time. The instantaneously ejected pulverized coal can fill a 100-meter-long The roadway can cause serious injury accidents to the personnel under construction. According to national statistics, my country is the country with the most severe coal and gas outbursts, and the number of gas outbursts in coal roadway excavation is the most, mainly due to the effect of ground pressure and gas pressure. , deep hole loosening blasting, hydraulic punching, combined with coal index prediction. Coal cuttings index prediction: Drill more than 2 drill holes with a diameter of 42m...

Claims

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Application Information

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IPC IPC(8): E21C41/16F42D3/00
Inventor 闫振东侯晋强张为远
Owner SHANXI JINCHENG ANTHRACITE COAL MINING GRP CO LTD
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