Analysis and optimizations on retreating mining measures of rock burst prevention on steeply dipping thick coal seam in deep exploitation
With the reduction of mine reserves in shallow coalbearing series, the mining proportion of steeply dipping thick coal seam in deep strata is increasingly high. Deep exploitation not only increases the chance rock burst happening in mine, but also there are some difficulties for the stability of corollary equipments in working face in the process of full-seam mining of steeply dipping thick coal seam. 4＃ coal seam of Huafeng colliery is under the geological condition of steeply dipping thick coal seam in deep mining. In the process of retreating mining, rock burst and stability of equipments always restrict the mines production. Through comprehensive analysis of 4＃ coal seam, including the places of rock burst happened, comprehensive management actions of rock burst and the relevant mining method and so on, found that adopted the exterior entry layout of dislocated strata gateway in the colliery is still inadequate to improve the problem of stability of equipments along coal seam floor. Besides, continuous mining to the east is too long, reduce the mining speed and mining of protective seam are not effective measures, even the occurrence reasons of rock burst. In response to these issues, further proposed the internal entry layout of dislocated strata gateway, through theoretical and experimental analysis, getting that the reform of tunnels arrangement not only improve the stability of mining equipment, but also change the present situation of rock burst of 4＃ coal seam fundamentally in Huafeng colliery.
Deep exploitation steeply dipping seam rock burst stability of equipment layout of dislocated strata gateway
Zhiqiang Wang JingliZhao Ruimin Feng Xingxing Wen
School of Resources & Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China
国际会议
The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)
北京
英文
822-831
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）