近距离煤层群下煤层开采矿压显现规律研究  

Research on laws of strata behaviors in mining of short distance coal seams

作　　者：董兴迎 DONG Xingying(Caozhuang coal mine of Feicheng Mining Group,Feicheng 271600,China)

机构地区：[1]肥城矿业集团曹庄煤矿,山东肥城271600

出　　处：《煤矿现代化》2020年第5期143-145,148,共4页Coal Mine Modernization

摘　　要：本文通过实测山西省某矿区某煤矿的近距离煤层群采空区下煤层开采的矿压显现规律,理论研究了了上煤层采空区与遗留煤柱对下煤层回采工作面矿压显现的影响,并对下煤层回采工作面初次来压、周期来压步距及工作面液压支架随工作面推进过程的变化进行了实测分析。结果表明,通过滑移场理论和极限平衡理论推导得到的采动底板破坏公式,能够较好的结合具体的煤层及底板岩层条件进行底板破坏深度及范围的计算,另外相比较覆岩中无采空区下测区,采空区下测区周期来压较混乱,强度不同的周期来压交替出现,强度较大的周期来压时压力增加过程短,来压较突然,且强度较大的周期来压对应的来压步距较短。该研究有利于为了进一步认识近距离煤层群采空区下回采工作面的矿压显现规律。In this paper,the law of ground pressure appearances under goaf of close seam group in a coal mine in Shanxi Province is measured.The influence of goaf and remaining pillar of upper seam on ground pressure appearances of lower seam is studied theoretically,and the initial pressure,periodic pressure step and hydraulic pressure of lower seam are also studied.The test results show that the support varies with the advancing process of the working face.The results show that the failure formula of mining floor deduced from the slip field theory and the limit equilibrium theory can be used to calculate the depth and range of floor failure in combination with the specific coal seam and floor rock conditions.In addition,compared with the under-measured area without goaf in overburden rock,the periodic pressure of the under-measured area is confused.Different periodic weighting occurs alternately.The process of pressure increase is short and the weighting is abrupt when the periodic weighting is strong,and the interval of weighting is short when the periodic weighting is strong.

关 键 词：近距离煤层 下煤层开采 采动底板破坏 矿山压力显现 支架工作阻力 

分 类 号：TD823[矿业工程—煤矿开采]