上湾煤矿特大采高工作面开采显著特征研究  

Study on the remarkable characteristics of mining in super high mining height working face of Shangwan coal mine

作　　者：姬智 王旭峰 郝军 崔东亮 王世平 JI Zhi;WANG Xufeng;HAO Jun;CUI Dongliang;WANG Shiping(Shangwan Coal Mine,Shendong Coal Group Co.,Ltd.,Ordos 017209,China)

机构地区：[1]神东煤炭集团上湾煤矿,内蒙古鄂尔多斯017209

出　　处：《中国矿业》2020年第12期140-146,共7页China Mining Magazine

摘　　要：本文以上湾煤矿第二个8.8m特大采高12402工作面为工程背景,首先,介绍了特大采高工作面配套使用的采煤机、液压支架、刮板输送机及乳化液泵站等主要设备在设备重量上、机械设计上与小采高工作面开采设备对比所具有的显著特点;其次,从形成"砌体梁"结构的理论条件出发,着重分析了特大采高工作面与小采高工作面相比老顶较难形成"砌体梁"结构的原因,结论认为特大采高工作面剧烈影响范围更广并且采空区的Δ值更大,"两更大"可造成形成"砌体梁"结构所必须的水平推力T不足,从而导致破断后的岩块不易形成"砌体梁"结构,而并不是由于采空区Δ值大单方面原因造成的;再次,介绍了目前特大采高工作面大断面切眼的支护设计,并着重分析了切眼周边的应力状态,为支护设计提供参考,尽可能减小围岩蠕变对正常开采的影响;最后,利用得出的"两更大"结论,对工作面初采期间的生产组织提出了建议,并认为前期开采所形成的大型采空区群对后续工作面的影响程度,目前留设25m宽的区段煤柱在将来的合理性,以及上湾煤矿原岩地应力场的测量应是下一步的研究重点。In this paper,12402 working face of the second 8.8 msuper high mining height of Shangwan coal mine,is taken as the engineering background.This paper firstly introduces the main equipment used in the super high mining face,such as shearer,hydraulic support,scraper conveyor and emulsion pump station,which have obvious characteristics compared with the mining equipment in low mining face in terms of equipment weight and mechanical design.Secondly,based on the theoretical conditions of forming"voussoir beam"structure,this paper focuses on the reasons why it is difficult to form"voussoir beam"structure in the main roof in super high mining face compared with low mining face.It is considered that the severe influence range of super high mining face is wider and theΔvalue in goaf is larger,and"two bigger"can cause the shortage of horizontal thrust T which is necessary for forming"voussoir beam"structure,so the broken rock blocks are not easy to form"voussoir beam"structure,not just the reason of the larger ofΔvalue in goaf.In addition,the current support design of large section setup room of super high mining face is introduced.Then,the stress state around the setup room is analyzed,which is used to provide references for support design,so we can reduce the influence of surrounding rock creep on normal mining.Finally,by using the"two bigger"obtained from the study,some suggestions are put forward for the production organization during the initial mining period of the mining face.And it is considered that the influence degree of the largescale goaf group formed in the early mining on the subsequent mining face,the future rationality of the coal pillar that width is 25 mnow and the measurement of the original rock stress field in Shangwan coal mine should be the next research focuses.

关 键 词：煤矿 特大采高 应力 采空区 砌体梁 

分 类 号：TD323[矿业工程—矿井建设]