综采工作面煤壁片帮影响因素研究  

Study on the influencing factors of coal wall rib spalling in fully mechanized working face

作　　者：宋振骐[1,2] 梁盛开[1,3] 汤建泉[2] 卢国志[2] 

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083 [2]山东科技大学采矿工程研究院,山东泰安271019 [3]贵州能发电力燃料开发有限公司,贵州贵阳550004

出　　处：《湖南科技大学学报（自然科学版）》2011年第1期1-4,共4页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家自然科学基金项目(51009015;50874021;50574016);辽宁省教育厅重点实验室项目(2009S006)

摘　　要：综放开采技术是厚煤层开采工艺的重要发展方向之一,采用三维有限元离散方法,研究了不同采高、不同采深、不同煤体硬度条件下煤壁片帮规律,得到了不同条件下规律拟合公式.结果表明:采高、采深、煤体硬度都影响煤体片帮;随着采深和煤体硬度增加,煤层片帮几率和片帮区范围加大;煤体硬度、采深对煤壁片帮范围影响较小;随着采高增大,煤壁支承压力峰值降低,深入煤体深度增加;煤壁片帮与采深、采高和煤体硬度呈非线性关系.该结果为进一步定量研究大采高条件下煤壁片帮影响因素提供了理论依据.Fully-mechanized caving technology is main derection in thick coal seam mining.3D finite element discretization method was used to study coal wall rib spalling law in different mining height,different mining depth and different coal hardness,and obtained the law fitting formula under different conditions.The result shows that mining height,mining depth and coal hardness all affect coal wall rib spalling,and with increase of them coal wall rib spalling probability and area also increase,but coal hardness and mining depth have little influence.With the increase of mining height,abutment pressure peak of coal wall decreases while entering coal body more deeply.Coal wall rib spalling has a nonlinear relationship with mining height,mining depth and coal hardness.The result provides theoretical basis for further quantitatively study on influencing factors of coal wall rib spalling under large mining height condition.

关 键 词：煤壁片帮 采高 采深 煤体硬度 影响因素 

分 类 号：TU452[建筑科学—岩土工程]