摘要
煤层开采过后上覆岩层中形成＂上三带＂,了解复合顶板厚煤层覆岩的三带分布状况对瓦斯抽采、覆岩运动、隔水开采等具有重要的意义。采用理论计算、现场实测分析和UDEC数值模拟等方法,确定余吾煤业S1202工作面覆岩的三带分布状况,为其瓦斯抽采提供理论依据。研究表明：在垂直方向上,垮落带与裂隙带的分界点在29.5~33.4 m之间,裂隙带的高度（垮落带以上）在60~64 m之间。
Three zones will be formed in overlying strata after mining. It is important for gas extraction, strata behaviors and mining un- der water to know the distribution of ＂three zones＂. Theoretical calculation, numerical calculation, field measurement will be used to determine the distribution of three zones＂ in order to provide gists to gas extraction. Researches show that, on the vertical dimension, the segmentation point between caving zone and fractured zone locates in 29.5 - 33.4 m. The height of fractured zone is about 60 64 m.
出处
《煤》
2015年第5期12-14,22,共4页
Coal
