Mine for high gas coal mine high efficient driving scheme
Date:2013-11-21 Hits:
Gas is one of the five natural disasters in coal mine, high gas coal mine is more obvious, the disaster is likely to cause casualties and property losses. Drilling pre pumping this equipment ordinary removal time, drilling time, extraction time, will undoubtedly occupy the normal tunneling time, this will affect the tunneling. We should not only put gas in this natural disaster change harm to treasure, but also to improve mine excavation speed, high gas mine excavation scheme is proposed.
A: with the rapid development of modern machinery and technology in coal mine, China coal mine drilling rig hydraulic type variety, regardless of machine that models but it is main part of motor, pump, motor, but China's current boring machine is the main component of motor, pump, motor, since the main part of the same, so we it could be considered boring machine and drill into boring machine, which is a device which can drill can be boring, thus changing the tunneling machine and the drilling rig drilling process frequently gave way before excavation and drilling and boring, so as to gain enough time, also on the safety of lifting the tunneling speed. Mobile number, but also can reduce the frequency of adjustment, the ventilation system in this way, the production efficiency is greatly improved.
Scheme two: in order to reduce the gas, rational use of gas, the gas change harm to treasure, the tunneling working face advancing pre pumping is on the one hand, the regional pre pumping, bottom drainage roadway pre pumping, liberation layer mining, it is a reasonable and effective method. Regional pre pumping: large area in the first mining area according to the depth of design rig drilling radiation by a plurality of the work surface, the formation of this area is the first extraction after digging, completes exhausting while digging, formed the entire air system, the kilometer rig drilling drilling Austria pre drainage, coal amount high concentration of gas is pumped into the ground through the pipeline gas power generation, coal gas is pumped into the region with low gas index, excavation team can be dug according to region of low gas, so as not to because of high gas and affect the normal excavation, improve the safety of driving efficiency.
Scheme three: bottom drainage tunnel is one of the pre pumping, close distance coal seams gas comprehensive management method. Bottom drainage roadway drilling pre pumping: formulating scientific and rational design in tunnel opening at the beginning, one is the advance of the upper coal seam roadway excavation of pre pumping, two is to make the upper cover seam fully relieved, three is for gas drainage mining protection process, at the same time to intercept the adjacent coal seam gas into the protective layer four, the goaf gas for drainage, contain gas flow direction, five is to increase the gas drilling, improve the concentration of gas extraction and extraction volume.
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