浅埋煤层开采界定指标取值特征分析

Analysis of Mining Depth'S Feature of Shallow Coal Scam

浅埋煤层上覆岩层是由诸多岩层分层构成的一定厚度的基岩层和其上方由风积砂、粘土层、风化层等构成的载荷层组成,单一关键层、宏观一带是浅埋煤层工作面矿压显现的主要特征,亦是与常埋深煤层工作面矿压显现规律间的根本区别。以煤层上覆岩层组成、长壁回采工作面覆岩活动规律、煤层埋藏深度作为浅埋煤层开采界定指标,论证了指标合理取值。

The overlying strata of shallow coal seam are composed by many rock strata and the aeolian sand, clay stratification, regolith which constitute the overburden of the shallow coal seam. The single key-layer and macro strip are the main features of shallow coal seam＇ s weighting which differs from the weighing of conventional coal seam basically. The reasonable definitional feature of shallow coal seam is analyzed base on the overlying strata＇ s composition, the activity law long - wall mining＇ soverlying layers and the depth of coal seam.