大采高采场覆岩结构特征及运动规律研究

Study on the structure characteristics and movement laws of overlying strata with large mining height

运用关键层理论研究了采场覆岩结构特征及运动规律.结果表明:垮落带及断裂带高度与覆岩关键层的分布特征密切相关,大采高的垮落带及断裂带高度大于相同煤厚分层开采相应的高度,且随采高增大呈台阶状上升.此研究是大采高条件下采场矿压控制、地表塌陷评价的基础.

Based on the key stratum theory, the structure characteristics and movement laws of overlying strata with different mining height are studied. The results indicated that the area of collapsed and cracked zone is directly related to the characteristics of key stratum.The area of collapsed and cracked zone is larger than that of the same coal thickness with slicing mining and its height will rise with the enlargement of mining height. The study is the basis of solving strata control around coal face and ground sinking assessment with large mining height.