Research and Application of Drainage Parameters for Gas Accumulation Zone in Overlying Strata of Goaf Area
While coal seam is being mined, an annular fissure circle with gas accumulation will be formed in the fissure zone as a result of desorption, dissipation and permeation of gas in the goaf area and overlying strata due to fissures from rock caving and mitigation in the roof. The methods for computation of spatial locations of the fissure circle are researched in this paper. Based on these methods, gas drainage technique for the fissure zone is optimized. By applying drill hole returning water method of variables, the height of caving zone that most affects the drainage effects of inclined high dip drill hole was measured on the site. Due to the consistency of the expected height with the computed height of caving lines at different positions, the correctness of the theoretical computation method is further validated. Meanwhile, the parameters of the inclined high dip drill hole at ＃3311 working face of Hexi Coal Mine are determined by a case study.
Overlying stratus in goaf area annular fissure circle gas drainage parameters
Zhang Meihong Wu Shiyue Wang Yongwen
College of Mining Engineering of Taiyuan University of Technology, Taiyuan, Shanxi China Shanxi Coking Coal Group CO. LTD., Taiyuan, Shanxi 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
608-615
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）