Research on Mining-induced Overburden Deformation Featuresat Remote Lower Protective Seam

摘要：

Based on the geological mining condition of certain mine at Huainan Mining Area, a numerical simulation model is set up to study the movement of mining-induced overburden, dynamic evolution and distribution features of mining-induced fissures during the process of advance of working face at lower protective seam. The research indicates that during the process of lower protective seam mining, the advanced pressure produces fissures on the overburden in front of the working face and forms a tunnel for gas flow. The relieved protective range along the trend of protected seam reaches over 30m and the relieved shielding angle is 54°. Around the gob, bed separation fissures are formed in the shape of O-ring; and a gas-rich zone, as well as a circulation zone, is created in the gob. The relieved gas in the protected coal seam can be pumped out through the circulation zone. Horizontal bed separation fissures and vertical cracks are formed in the overlying strata. Vertical cracks are main channels for transmitting the gas in coal seam. Horizontal bed separation fissures are storage space for gas. It is precisely because the dynamic change of horizontal bed separation fissures and vertical cracks creates the condition to realize the co-mining of coal and gas. The result of the research has guided the practice on site and has achieved good results.

关键词： remote protective seam mining overburden deformation characteristics

作者: MA Zhanguo MA Jigang PAN Yinguang ZHANG Boyang HAN Meng

作者单位: State Key Laboratory for Geomechanics & Deep Underground Engineering,Xuzhou 221008,Jiangsu,China;Sch School of Sciences,China University of Mining & Technology,Xuzhou 221008,Jiangsu,China

会议类型: 国际会议

会议名称: The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)

会议地点: 北京

会议语种:英文

页码: 1529-1534

在线出版日期: 2008-09-24（万方平台首次上网日期，不代表论文的发表时间）