Analysis of roof structure and support load of mining face under ultra-close goaf in shallow multiple seams
HUANG Qingxiang，CAO Jian，HE Yanpeng
(Key Laboratory of Western Mine Exploitation and Hazard Prevention of Ministry of Education，School of Energy，Xi'an University of Science and Technology，Xi'an，Shaanxi 710054，China)
Based on the problem of support load determination of mining under ultra-close goaf in shallow multiple seams，taking conditionof ultra-closeseams mining in Shenfu mining area as the background，the collapsed roof structure of the secondary mining in goaf is revealed by using physical simulation experiment and theoretical analysis. The roof structure model of ultra-close seams mining is set up，and the support load calculation formula is put forward. The study shows that the roof structure has free-caving zone and slanting pillar-beam zone in the upper seam goaf. In the mining process of lower seam，roof structure movement under slanting pillar-beam zone is divided into hinged separation section and sedimentation compaction section. Through the establishment of the two stages of roof structure model，the support load calculation formulas to determine the support resistance are set up，and it is determined that the formula of sedimentation compaction section should be the basis of support selection. It is verified reliable through case analysis of shallow buried ultra-close multiple seams mining in Shigetai coal mine.
黄庆享，曹 健，贺雁鹏. 浅埋极近距采空区下工作面顶板结构及支架载荷分析[J]. 岩石力学与工程学报, 2018, 37(S1): 3153-3159.
HUANG Qingxiang，CAO Jian，HE Yanpeng. Analysis of roof structure and support load of mining face under ultra-close goaf in shallow multiple seams. , 2018, 37(S1): 3153-3159.
杨俊哲.浅埋近距离煤层过上覆采空区及煤柱动压防治技术[J].煤炭科学技术，2015，43(6)：9-13.(YANG Junzhe.Dynamic pressure prevention and control technology of coal mining face with shallow depth and contiguous seams passing through overburden goaf and coal pillars[J].Coal Science and Technology，2015，43(6)：9-13.(in Chinese))
[2]
高登彦，高登云，侯志成. 特近层间距下煤层综采工作面初采压架机制及处理措施[J].煤炭工程，2015，47(8)：64-67.(GAODengyan，GAO Dengyun，HOU Zhicheng. Mechanism and treatment measures of support crashingin fully mechanized working face during initial miningof coal seam under ultra-thin interburden[J]. Coal Engineering，2015，47(8)：64-67.(in Chinese))
[3]
谷拴成，陈盼，王建文，等.采空区下煤层开采矿压显现规律实测研究[J].煤炭工程，2013，(9)：64-67.(GU Shuancheng，CHEN Pan，WANG Jianwen，et al.Research on strata behavior of lower coal seam mining under goaf[J]. Coal Engineering，2013，(9)：64-67.(in Chinese))
[4]
于斌，刘长友，杨敬轩，等. 大同矿区双系煤层开采煤柱影响下的强矿压显现机制[J].煤炭学报，2014，39(1)：40-46.(YU Bin，LIU Changyou，YANG Jingxuan，et al.Mechanism of strong pressure reveal under the influence of mining dual system of coal pillar in Datong mining area[J]. Journal of China Coal Society，2014，39(1)：40-46.(in Chinese))
[5]
鞠金峰，许家林，朱卫兵，等. 神东矿区近距离煤层出一侧采空煤柱压架机制[J].岩石力学与工程学报，2013，32(7)：1 321-1 330.(JU Jinfeng，XU Jialin，ZHU Weibing，et al.Mechanism of support crushing while mining out of upper goaf-side coal pillar in close distance seams of Shendong[J].Chinese Journal of Rock Mechanics and Engineering，2013，32(7)：1 321-1 330.(in Chinese))
[6]
郑百生，谢文兵，窦林名，等. 不规则煤柱作用下工作面开采的三维数值模拟[J].煤炭学报，2006，31(2)：137-140.(ZHENG Baisheng，XIE Wenbing，DOU Linming，et al.3D simulation on caving of face affected by irregular pillar[J]. Journal of China Coal Society，2006，31(2)：137-140.(in Chinese))
[7]
吴爱民，左建平，郭志飚，等. 钱家营矿近距离煤层巷道破坏原因及支护对策[J].煤炭科学技术，2010，38(1)：13-16.(WU Aimin，ZUO Jianping，GUO Zhibiao，et al.Failure causes and supportcountermeasures ofgateway inseam with close distance toother seams in Qianjiayingmine[J]. Coal Science and Technology，2010，38(1)：13-16.(in Chinese))
[8]
张 炜，张东升，陈建本，等. 极近距离煤层回采巷道合理位置确定[J].中国矿业大学学报，2012，41(2)：182-188.(ZHANGWei，ZHANG Dongsheng，CHEN Jianben，et al.Determining the optimum gateway location for extremely close coal seams[J]. Journal of China University of mining and Technology，2014，41(2)：182-188.(in Chinese))
[9]
朱润生. 极近距离煤层回采巷道合理位置确定与支护技术[J].煤炭科学技术，2012，40(4)：10-17.(ZHU Runsheng.Rational location and support technology of mining gateway inseam with ultra closed distance to above seam[J]. Coal Science andTechnology，2012，40(4)：10-17.(in Chinese))
[10]
朱 涛，张百胜，冯国瑞，等. 极近距离煤层下层煤采场顶板结构与控制[J].煤炭学报，2010，35(2)：190-193.(ZHU Tao，ZHANG Baisheng，FENG Guorui，et al.Roof structure and control in the lowerseam mining fieldin the ultra-close multiple seams[J]. Journal of China Coal Society，2010，35(2)：190-193.(in Chinese))
[11]
谷拴成，陈盼，王建文.近距离煤层采空区下工作面矿压显现规律研究[J].煤炭工程，2014，46(5)：74-80.(GU Shuancheng，CHEN Pan，WANG Jianwen.Study on mine strata pressure behavior law of coal mining face under goaf of close distance seams[J]. Coal Engineering，2014，46(5)：74-80.(in Chinese))
[12]
薛广哲，任博玲，冯宇峰.近距离煤层下煤层顶板结构力学分析[J].煤矿安全，2011，42(2)：143-149.(XUE Guangzhe，REN Boling，FENG Yufeng.Study on mine strata pressure behavior law of coal mining face under goaf of close distance seams[J]. Safety in Coal Mines，2011，42(2)：143-149.(in Chinese))
[13]
黄庆享，钱鸣高，石平五. 浅埋煤层采场老顶周期来压的结构分析[J]. 煤炭学报，1999，24(6)：581-585.(HUANG Qingxiang，QIAN Minggao，SHI Pingwu. Structural analysis of main roof stability during periodic weighting in long wall face[J].Journal of China Coal Society，1999，24(6)：581-585.(in Chinese))
[14]
黄庆享.浅埋煤层长壁开采顶板结构及岩层控制研究[M].徐州：中国矿业大学出版社，2000：151-157.(HUANG Qingxiang. Roof structure and roof control theory of longwall mining in shallow seam[M]. Xuzhou：China University of Mining Technology Press，2000：151-157.(in Chinese))
[15]
贺永年，韩立军，王衍森.岩石力学简明教程[M].徐州：中国矿业大学出版社，2010：147-149.(HE Yongnian，HAN Lijun，WANG Yansen. A concise course of rock mechanics[M].Xuzhou：China University of Mining，2010：147-149.(in Chinese))
2018, Vol. 37 
