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根据一些高沼气局矿的经验,尾巷排放瓦斯是防止和消除回采面上隅角瓦斯超限积聚的有效措施。1986年上半年我局夹河煤矿在7415工作面作了大胆地尝试,取得了良好的效果。实施尾排前,该面上隅角及上部5～6台液压支架处,瓦斯经常超限。虽经挂风幛,安局扇也未杜绝瓦斯积聚。有时瓦斯浓度高达10％以上,影响生产,威胁安全。后来,因地制宜利用施工道作为尾巷排放瓦斯,效果显著。每天排放量为2240m~3。2月份高达2967m~3/d。1～5月共排放瓦斯约28万m~3。在1986年鉴定时,该面尾排瓦斯量占总涌出量的45%。不但降低了回风流瓦斯浓度,而且有效地消除了上隅角瓦斯超限积聚,保证了安全生产。
According to the experience of some high-density gas bureaus and mines, the discharge of tail gas from the tailings is an effective measure to prevent and eliminate the over-accumulation of gas in the upper corner of the mining face. In the first half of 1986, the Bureau of Jiahe Coal Mine made a bold attempt on the 7415 face and achieved good results. Before the implementation of the tail row, the surface of the upper corner and the upper 5 to 6 hydraulic support at the gas often overrun. Despite the hanged wind, safety fan did not put an end to gas accumulation. Sometimes gas concentrations up to 10% or more, affecting production, threatening safety. Later, according to local conditions, the use of construction roads as tailings emission gas, the effect is remarkable. Daily emissions of 2240m ~ 3. 2 months up to 2967m ~ 3 / d. From January to May a total of about 280000 m 3 gas drainage. When identified in 1986, the face tail gas accounted for 45% of the total emission. Not only reduces the return air flow gas concentration, and effectively eliminate the upper corner of the gas over-accumulation, to ensure safe production.