巨厚砂岩顶板弱化下矿压显现特征

 以某矿210108 综采工作面为研究对象，针对工作面顶板较坚硬、不易自然垮落的特点，为得到该条件下的矿压显现特征，制定了巨厚砂顶板深孔爆破弱化条件下的现场矿压观测方案。通过对实测数据及现场矿压日报的整理分析，对采场矿压显现特征、顶板活动规律和超前支承压力分布规律进行了研究，并分析了初次来压和周期来压期间支架载荷的变化情况。结果表明，通过掌握坚硬顶板弱化条件下的矿压显现规律，对指导工作面安全高效开采具有重要意义。

Strata Behaviors Laws Under the Condition of Thick Sandstone Roof Weakening

With the fully mechanized coal mine surface of a mine 210108 as the object of research, in view of the fact that the working face is hard and the natural caving roof is not easy to colapse, in order to determine its characteristics under the condition of the mine, an observation scheme is devised for the thick sand roof under the condition of the deep hole blasting weakening the mineral pressure. Based on the measured data and the daily field pressure analysis, the pressure characteristics, the stope roof activity and the abutment pressure distribution are studied, and analyzed during the first weighting and periodic changes of the support load. It is shown that under the condition of hard roof weakening, an understanding of the mine pressure variation law is of great significance to safety and efficiency of the working face mining.