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作 者:史宏宝 张世锐 刘晓龙 Shi Hongbao;Zhang Shirui;Liu Xiaolong(Shanxi Pulongwan Coal Industry Co.,Ltd.,Datong 034400,China)
机构地区:[1]山西铺龙湾煤业有限公司,山西大同034400
出 处:《山东煤炭科技》2025年第3期47-52,共6页Shandong Coal Science and Technology
摘 要:针对铺龙湾煤矿五二采区建(构)筑物、水体下压煤区域,进行了间隔膏体充填安全开采支巷尺寸及煤柱宽度的力学分析与数值模拟研究。结果表明,在5211工作面间隔充填开采设计中,支巷间煤柱的最小宽度为10.74 m,一个开采单元宽度为16.0 m,其中包括4.0 m的支巷宽度和12.0 m的煤柱宽度。当支巷宽度及煤柱宽度固定时,煤柱塑性破坏区域随着支巷长度增加而逐渐扩大;当支巷长度固定时,煤柱塑性破坏区域随着支巷及煤柱宽度减小而逐渐扩大。采用该方案实施间隔充填采煤后,观测到底鼓总位移量为105 mm,顶板下沉总量53 mm,巷道帮部围岩变形量分别为39 mm和35 mm,所设计的支巷尺寸及煤柱留设方案有效地维护了巷道安全稳定性,保证了生产的连续性,达到了预期的效果。Aiming at the buildings(structures)and coal pressing areas under water in the No.52 mining area of Pulongwan Coal Mine,mechanical analysis and numerical simulation study are conducted on the safe mining support roadway size and its coal pillar width of interval paste filling.The research results show that in the interval filling mining design of the 5211 working face,the minimum width of the coal pillar between the support roadways is 10.74 m,and the width of one mining unit is 16.0 m,including a support roadway width of 4.0 m and a coal pillar width of 12.0 m.When the width of the support roadway and the width of the coal pillar are fixed,the plastic failure area of the coal pillar gradually expands with the increase of the length of the support roadway;When the length of the support roadway is fixed,the plastic failure area of the coal pillar gradually expands as the widths of the support roadway and coal pillar decrease.After implementing interval filling coal mining adopting this scheme,the total displacement amount of the floor heave is observed to be 105 mm,the total subsidence amount of the roof is 53 mm,and the deformation amount of the surrounding rock at the roadway side is 39 mm and 35 mm,respectively.The designed support roadway size and coal pillar retention scheme effectively maintains the safety and stability of the roadway,ensures the continuity of production,and achieves the expected results.
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