针对神东矿区石圪台矿12102工作面矿压显现不明显和周期来压步距较大等问题,采用现场实测、理论分析和物理模拟的方法,对浅埋深极近距离煤层开采工作面的矿压显现特征和周期来压规律进行了研究。结果表明:采空区下煤层工作面的周期来压步距为23 m,是上煤层工作面的2.1倍,而周期来压持续长度反而减少了0.8～1.6 m,造成该现象的主要原因是下煤层工作面的矿压显现受上覆主关键层回转运动的影响,因主关键层破断块体较长且距离下煤层较远,导致主关键层破断块体回转较小角度便能受到采空区冒落矸石的支撑,从而出现了工作面周期来压步距更大及来压持续长度更短的现象。

According to the unclear mine strata pressure behavior,short periodical roof weighting step distance and other problems occurred in No.12102 coal minin g of Shigetai Mine in Shendong Mining Area,the site measurement,theoretical analysis and physical simulation method were applied to study the mine strata pressure b ehavior features and periodical roof weighting law of the coal mining face in the ultra contiguous seam with shallow depth.The results showed that the periodical roof w eighting step distance of the coal mining face in seam under mining goaf was 23 m,was 2.1 times higher than the coal mining face in above seam and the sustainable le ngth of the periodical roof weighting would be reduced by 0.81 .6 m.The main causes of the phenomenon occurred was the mine strata pressure behavior of the coal min ing face in the below seam affected by the rotary movement of the main key stratum in the overburden.Due to the broken block of the main key stratum was long and th e distance to the below seam was far,the small angle rotary of the broken block in the main key stratum could have the support of the falling rocks in the mining goaf an d thus a phenomenon with a longer periodical roof weighting step distance and a shorter roof weighting sustainable length of the coal mining face would be occurred.

国家自然科学基金和神华集团有限公司联合资助项目(51174288)；国家自然科学基金资助项目(51204160)；江苏高校优秀学科建设工程资助项目(SZBF2011-6-B35)；