High-efficiency tunneling gas control method for high outburst mine coal roadway

Abstract

The invention discloses a high-efficiency tunneling gas control method for a high outburst mine coal roadway, which comprises the following steps: before the working surface of the outburst mine coal roadway is used for tunneling, respectively forming a drill site at two sides of the coal roadway, perforating overlong deep holes from each drill site along the tunneling direction of the coal roadway, and carrying out grouting treatment so that gas in the grouting range along the tunneling direction of the coal roadway is relatively isolated from the surrounding environment, thereby forming a relatively closed roadway tunneling space, eliminating the potential safety hazard of outburst in the roadway tunneling process, and overcoming the original defect that as the time for pumping and discharging the gas is too long, the whole tunneling efficiency is very low; meanwhile, the method of the invention realizes high-efficiency tunneling in the premise of safety and has simple operation of construction processes; and the method is suitable for being popularized and utilized under various conditions of occurrence of high outburst coal seams.

Description

technical field [0001] The invention relates to a coal mine gas control technology, in particular to a high-efficiency coal mine roadway gas control method, which belongs to the technical field of coal mine gas control. Background technique [0002] The geological conditions of my country's coal mines are complex, especially the mines in the southwestern part of my country are complex and most of them are gas outburst mines. During the excavation process of high outburst mines, in order to prevent disasters caused by gas outburst, the deep hole gas drainage and pressure relief are often carried out on the excavation working face before the gas pressure is reduced to meet the requirements of the "Coal Mine Safety Production Regulations" After that, the coal roadway is excavated to ensure the safety of production; or another rock roadway is excavated along the top (bottom) plate of the coal roadway, and the coal seam drilling is carried out in advance to drain the gas in the r...

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Problems solved by technology

[0003] However, the inventors found that there are still the following problems in the existing gas control technology in the coal roadway excavation of high outburst mines: the method of using pre-drainage and then proceeding to excavation after the gas reaches the specified range makes the gas drainage time too long and requires a large amount of gas to be drained. The waiting time can be excavated, which makes the excavation efficiency generally low, seriously affects the mining balance of the entire mine, and is not conducive to efficient production

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