泥、砂岩交互地层综放开采覆岩破坏高度的确定

发布时间：2018-04-09 10:46

本文选题：泥砂岩交互地层　切入点：综放开采　出处：《采矿与安全工程学报》2017年03期

【摘要】：为了确定泥、砂岩交互地层综放开采覆岩破坏高度,以余吾煤业N1102综放面为例,运用多种方法研究该工作面回采过程中覆岩破坏情况。结果表明:运用关键层理论结合软、硬岩破断的力学分析法所确定的覆岩破坏最大高度为61.04 m,并指出覆岩破坏发育主要受各关键层控制,当其临界高度(岩层下部自由空间为0)位于相邻关键层之间,具体破坏高度受控于相邻关键层之间覆岩岩性和岩层下部自由空间。应用钻孔电视图像技术和数值模拟法所确定的覆岩破坏高度为50~63 m,并得出软、硬岩采动裂隙的发育特征,验证了理论分析结果的准确性,表明此理论分析方法可用于确定同类条件下的覆岩破坏高度。
[Abstract]:In order to determine the failure height of overlying rock in fully mechanized caving mining in mud and sandstone interactive strata, taking N1102 fully mechanized caving face of Yuwu coal industry as an example, the failure of overburden rock in the mining process of this working face is studied by various methods.The results show that the maximum height of overburden failure determined by the mechanical analysis method of breaking and breaking of hard rock is 61.04 m, and it is pointed out that the development of overburden failure is mainly controlled by each key layer.When the critical height (free space in the lower part of the rock layer is 0) lies between the adjacent critical layers, the specific failure height is controlled by the lithology of the overlying rock and the free space of the lower part of the rock layer between the adjacent key layers.The failure height of overburden determined by the technique of borehole television image and numerical simulation is 50 ~ 63 m, and the development characteristics of mining fissure in soft and hard rock are obtained, and the accuracy of theoretical analysis results is verified.It is shown that the theoretical analysis method can be used to determine the failure height of overburden rock under the same condition.
【作者单位】：中国矿业大学(北京)资源与安全工程学院;中国矿业大学(北京)地球科学与测绘工程学院;
【基金】：国家自然科学基金项目(51274205)
【分类号】：TD821

【相似文献】