School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing) Jinzhuang Limited
Liability Company

为了探讨大倾角松软煤层综放开采顶板活动规律,运用物理相似模拟试验与现场实测相结合的方法,研究了覆岩运移特征、顶板垮落步距及矿压显现规律。结果表明:覆岩下沉曲线呈非对称性,最大下沉量随高度增加而减小;工作面上段矿压显现强于中段,下段最弱,且两端头来压时间滞后于中部来压;工作面巷道支承压力最大值位于超前工作面17~25 m,超前工作面约40 m范围内应重点加强支护。试验结果与现场观测基本相符,为工作面支架选型提供了依据。

In order to study the roof movement features of fully-mechanized top coal mining in soft large inclined angle seams, the overlaying strata displacement, r oof weighting step and mining pressure appearance were researched by using analogy simulation tests and the field monitoring. The results showed that overlaying stra ta sinked asymmetry and maximum subsidence decreased with increasing height in the process of mining face. The greatest strength and biggest weakness of mining p ressure appearance were upper and lower part, taking on faster in the middle than in the ends. The maximum abutment pressure was in 17 ~ 25 m ahead the working fa ce, the support strength should be strengthened within 40 m ahead the working face. The test results and field observation were in substantial agreement, which could provide the guidance references to the hydraulic powered support selection.

国家自然科学基金煤炭联合基金资助项目(51134025)；