采高对浅埋煤层老顶岩层破断距的影响  

Influence of mining height of main roof on broken length

作　　者：张杰[1] 

机构地区：[1]西安科技大学能源学院,陕西西安710054

出　　处：《辽宁工程技术大学学报（自然科学版）》2009年第2期161-164,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(50074023);教育部博士学科点基金资助项目(20050704003);西安科技大学培育基金资助项目(200601)

摘　　要：煤层的开采高度对关键层的破坏有重要影响,为了研究采高对组合关键层破坏的影响,运用数值分析方法分析组合关键层有关参数的基础上,研究了采高变化对组合关键破断的影响,即对采场来压步距的影响,进而修正了浅埋煤层开采采场初次来压步距的计算公式。结果表明,以该修正的组合关键层破断距公式计算的大柳塔1203工作面的初次来压步距与实测非常接近。该公式对于地表厚松散层浅埋煤层中的组合关键层的破断距计算具有一定的适应性。The mining height has important influence on the destruction of key strata, In order to study the important influence on the destruction of combinatorial key strata, based on the analysis of parameter about combinatorial key stratum, the influence of mining height of combinatorial key strata on broken length of the harden strata, or roof weighting step in long wall face was investigated by the finite element method. The formulae of calculating the roof weighting step was constructed. The study indicates that according to the formulae of combinatorial key stratum, coal roof weighting step in the 1203 face in Da-liu-ta mining is co the observation value. The consistency proves the formulae of combinatorial key stratum is Correct. The conclusion that shallow coal seam covered with thick loose layer should use the theory of combinatorial key stratum is proved.

关 键 词：浅埋煤层 组合关键层 采高 破断距 

分 类 号：TD31[矿业工程—矿井建设]