坚硬粘土层对薄基岩综放工作面矿压显现的影响

为了研究坚硬粘土层的存在对薄基岩综放工作面矿压显现的影响,以司马矿1101工作面为研究对象,采用理论分析、数值模拟和现场实测的方法对薄基岩工作面覆岩结构和矿压显现规律进行研究。结果表明:粘土层的存在,在一定程度上承担了上覆沙土层的载荷并和薄基岩组合形成较稳定的结构,随着粘土层厚度增加支撑压力峰值向前转移,缓减了矿压显现强度,保证了1101工作面初期的安全开采,取得良好的经济效益。

The Influence of Hard Clay Layer on Strata Behavior of Fully-Mechanized Top Coal Caving Face in Thin Bedrock

In order to study the influence of the existence of hard clay layer on pressure behavior in the fully mechanized top-coal caving face in thin bedrock,and take Sima coal mine No.1101working face as the research target,the theoretical analysis,numerical simulations and field measurement method were adopted to research overburden strata structure and pressure behavior of working face in thin bedrock.Results show that the existence of clay layer to a certain extent bears the load of overlying sand layer,and formed the more stable structure combined with thin bedrock.With clay layer thickness increasing,support pressure peak forward transfer and decreased strength of pressure behavior.Guaranteeing the early safe mining in No.1101 mining face and good economic efficiency was obtained.