薄基岩特厚煤层综放开采相似模拟试验研究  

Similar Simulation Experiment of Fully Mechanized Top Coal Caving Mining Extra of Thick Coal Seam

作　　者：夏青森 刘飞 龚鹏[2] 邓瑞刚 吴杰 姚建 

机构地区：[1]宿州学院资源与土木工程学院,安徽宿州234000 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008

出　　处：《河北北方学院学报（自然科学版）》2017年第1期40-44,共5页Journal of Hebei North University:Natural Science Edition

基　　金：国家自然科学基金项目(51074163);国家自然科学基金重点项目(50834005);2015年宿州区域发展协同创新中心学生开放课题(2015SZXTXSKF10)

摘　　要：目的薄基岩特厚煤层综放开采中许多科学问题急需研究;许多宝贵经验需要总结;煤炭开采后关键层的破断变形规律、地表移动与变形规律、工作面矿压规律与自然发火之间的关系等技术问题急需研究与探讨。方法以某煤田资源开采地质条件为背景,建立薄基岩特厚煤层综放开采相似模拟模型。结果对回采过程中工作面周期来压步距、影响范围、地表沉陷特征、基本顶破断规律等关键问题进行系统研究。结论基本顶周期垮落步距约为18cm,且呈大小交替的周期变化;随工作面推进,采空区岩层堆积角层呈周期性变化,呈阶梯状斜向采空区发展;根据关键层判定特征,初步可判定6#煤层上方7.8~21.3 m的基本顶岩层为F6203工作面的主关键层。Objective Many scientific problems of thin bedrock special thick seam fully mechanized still remain to be discussed and many valuable lessons need to summarize.The technological problems,such as breakage of key strata after coal mining deformation,surface movement and deformation law,mine pressure regularity and the relationship between the spontaneous combustion,are in urgent need of research and discussion.Methods Based on the background of mining geological conditions of coal resources,a similar simulation model of fully-mechanized mining of thin bedrock specially thick coal seam was established.Results It conducted the systematic research on key problems such as periodic pressure,influence scope,characteristics of surface subsidence and basic roof breaking law in the process of mining coal face.Conclusion Periodic caving distance of basic roof was about 18 cm the size had changes with an alternating cycle;with the advance of working face,the accumulation of strata in goaf angle of the layer changed periodically,developing toward the mined out area with ladder oblique;according to the judgment of the key layer characteristics,it could initially conclude that the main key stratum of basic roof of F6203 working face was 7.8m^21.3mabove 6# coal seam.

关 键 词：薄基岩 综放 相似模拟 覆岩变形 

分 类 号：TD823.49[矿业工程—煤矿开采] TD32[矿业工程—矿山开采]