工作面过破坏区开采方法与覆岩破断规律研究

发布时间：2018-04-17 05:12

本文选题：小煤窑巷道 + 支架-围岩稳定　；参考：《煤炭学报》2017年S1期

【摘要】：以崔家寨E13103工作面为研究背景,运用力学分析、数值模拟、现场实测等方法,对垂直、斜交、平行3种不同类型的小煤窑巷道破坏形式进行研究,掌握了小煤窑破坏区内全工作面应力分布规律;并针对不同类型的小煤窑巷道,建立了系统的过破坏区的开采工艺,尤其对于贯穿于工作面的4条平行空巷,采用"摆动调斜"的方式回采工作面;通过研究支架-围岩稳定性,建立了过小煤窑巷道顶板破断力学模型,并得出了揭露空巷阶段支承压力分布规律;通过分析"顶板-支架-空巷-煤柱-实体煤"之间关系,推导出工作面支架过小煤窑巷道阶段合理工作阻力计算公式,揭示了目前工作面支架选型并不合理等问题,有效指导支架设计与选型;同时提出了相应的小煤窑破坏区下开采安全技术措施。
[Abstract]:Taking Cuijiazhai E13103 face as the research background, using the methods of mechanical analysis, numerical simulation and field measurement, the failure forms of three different types of small coal mine roadways, vertical, oblique and parallel, are studied.The stress distribution law of the whole working face in the small coal mine failure area is grasped, and the mining technology of the overfailure area is established for different types of small coal mine roadways, especially for the four parallel empty roadways running through the working face.Through studying the stability of support and surrounding rock, the mechanical model of roof breaking of roadway through small coal mine is established, and the distribution law of supporting pressure in the stage of empty roadway is obtained.Based on the analysis of the relationship between "roof support, caving roadway, coal pillar and solid coal", the reasonable working resistance calculation formula of working face support in the stage of small coal kiln roadway is deduced, and the problems such as unreasonable type selection of working face support are revealed.The support design and type selection are effectively guided, and the corresponding mining safety measures under the small coal mine failure zone are put forward.
【作者单位】：中国矿业大学(北京)资源与安全工程学院;
【基金】：国家自然科学基金青年基金资助项目(51404275);国家自然科学基金联合基金资助项目(U1361209);国家自然科学基金面上基金资助项目(51674264)
【分类号】：TD325;TD823

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