综放工作面顶板随采式专用排瓦斯巷布置研究

发布时间：2018-01-01 09:17

本文关键词：综放工作面顶板随采式专用排瓦斯巷布置研究　出处：《安全与环境学报》2016年04期 　论文类型：期刊论文

【摘要】：确定合理的专用排瓦斯巷参数是确保能否高效治理综放工作面瓦斯积聚及上隅角瓦斯超限现象的关键。结合五阳煤矿7605工作面的实际情况,采用瓦斯运移规律、矿压理论、矿井通风等理论及FLAC3D数值模拟软件,对专用排瓦斯巷的合理层位、距离回风巷的水平距离、巷道断面面积等参数进行了研究。结果表明,专用排瓦斯巷适合布置在岩层垮落带的中下部,距离回风巷的水平距离受巷道等效半径影响,巷道断面面积由通风能力和掘进工程量决定,7605工作面专用排瓦斯巷的3个参数分别为距煤层顶板2.65~6.75 m、距离回风巷水平距离约15 m、巷道断面面积7 m~2。现场应用表明,工作面回采期间瓦斯体积分数维持在0.3%左右,上隅角瓦斯体积分数未发生超限,瓦排巷与工作面连通顺畅,瓦斯治理效果显著。
[Abstract]:Determining reasonable parameters of special gas drainage roadway is the key to ensure that gas accumulation and gas over-limit phenomenon in upper corner corner of fully mechanized caving face can be controlled efficiently, combined with the actual situation of 7605 face in Wuyang Coal Mine. By using the law of gas migration, the theory of mine pressure, the theory of mine ventilation and the numerical simulation software of FLAC3D, the reasonable horizon and the horizontal distance from the return air lane of the special gas drainage roadway are analyzed. The results show that the special gas drainage roadway is suitable to be arranged in the middle and lower part of the rock collapse zone, and the horizontal distance from the return air lane is affected by the equivalent radius of the roadway. The area of roadway section is determined by ventilation capacity and tunneling engineering quantity. The three parameters of special gas drainage roadway of No. 7605 face are 2.65 ~ 6.75 m from the top of coal seam, respectively. The horizontal distance is about 15 m, and the area of roadway section is 7 m / 2. The field application shows that the gas volume fraction is about 0.3% during mining. The gas volume fraction in the upper corner is not over the limit, the tiled roadway and the working face are connected smoothly, and the gas control effect is remarkable.
【作者单位】：辽宁工程技术大学矿业学院;
【基金】：国家自然科学基金项目(51004063) 辽宁工程技术大学2014年研究生科研立项(5A2014019)
【分类号】：TD712
【正文快照】： 0引言随着采煤工作面机械化水平的提高,综采及综采放顶煤工艺具有高产、高效、低成本等优点,在开采厚煤层及特厚煤层时被广泛应用[1-3],但由于工作面推进速度快、采高大、出煤多,工作面瓦斯涌出量也随之增大,工作面容易出现瓦斯积聚和上隅角超限[3-5]。目前解决瓦斯问题的主要

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