深井大采高综采面矿压显现及覆岩破断规律研究

针对深井大采高综采技术中采场矿压控制难的特点，以潘二矿11223大采高综采工作面为工程背景，采用相似模拟、数值模拟、现场矿压监测、理论分析等方法，对深井大采高综采工作面矿压显现及覆岩运动破断规律进行研究。结果表明:深井大采高综采面覆岩运动破断后结构形态演化特征可概括为“组合悬臂岩梁结构——压实填充结构——非铰接岩梁结构——铰接岩梁结构”的动态演化过程，这种动态演化过程直接影响着工作面的矿压显现特征及覆岩破坏特点；得到工作面初次来压步距为34 m，基本顶周期来压步距15 m，来压由中部开始向两端转移；工作面前方应力集中区距煤壁平均4.4 m，应力峰值平均为26 MPa，工作面矿压显现特点受控于覆岩运动破断的动态演化力学结构，研究结果对类似条件下的工作面安全开采具有一定的理论依据和借鉴意义。

Study on strata behaviors and overburden strata breaking laws of fully mechanized mining face with large mining height in deep mines

In view of the characteristics that the stope pressure is difficult to control by the technology of fully mechanized mining with large mining height in deep mines, taking the 11223 fully mechanized mining face with large mining height in Pan'er Mine as the engineering background, the strata behaviors and overburden strata movement and breaking laws of fully mechanized mining face with large mining height in deep mines were studied by using the similar simulation, numerical simulation, on-site pressure monitoring, theoretical analysis and other methods. The results showed that the evolution characteristics of structural form after the overburden strata movement and breaking in the fully mechanized mining face with large mining height in deep mines could be summarized as the dynamic evolution process of "combined cantilever rock beam structure-compacted filling structure-non-articulated rock beam structure-articulated rock beam structure", and this dynamic evolution process directly influenced the characteristics of strata behaviors and overburden strata breaking in the working face. The first weighting step of the working face was 34 m, the basic roof periodic weighting step was 15 m, and the weighting started in the middle and then transferred to both ends. The average distance of the stress concentration area in front of working face away from the coal wall was 4.4 m, the average peak stress was 26 MPa, and the characteristics of strata behaviors in the working face were controlled by the dynamic evolution mechanical structure of the overburden strata movement and breaking. The results have a certain theoretical basis and reference significance for the safe mining in the working face with similar conditions.