赵各庄矿深部工作面动力显现防治技术研究

 针对赵各庄矿3237工作面分层开采条件下动力显现频发的现象，从矿井地质开采条件入手，对发生动压现象的工作面的诱发因素进行全面、系统分析，运用数值模拟、理论分析、现场实测的方法研究工作面前方分层开采和放顶煤开采条件下主应力分布规律，通过对不同条件下主应力分布规律分析，提出了通过开采保护层、采用放顶煤开采两项技术的耦合作用，同时结合局部解危技术改变煤岩层能量释放模式的方案。通过对该工作面的实际矿压观测研究，结果表明在深部高应力区域进行综放开采能有效缓解动压现象的危险程度；采用开采保护层方法解除了工作面的高应力，同时对放顶煤高应力区进行了区域卸压，使工作面前方支承压力集中系数为1.39，影响范围36m，整体上改变了高应力引发动压的力学条件，极大地降低了动压强度。

Study on Dynamic Behavior Prevention and Control Technology of Coal Mining Face in Deep Mine of Zhaogezhuang Mine

Aiming at frequent dynamic pressure behavior under layer mining at 3237 working face in Zhaogezhuang colliery, inducing factors of the working face, at which dynamic pressure phenomenon occurred, were analyzed comprehensively and systematically according to the geological and mining conditions. The main-stress distributing rules in front of the working face under the conditions of layer mining and top-caving mining were researched through the methods of numerical simulation, theoretical analysis and field measurement. Through the analysis of the main stress under that two different conditions, this paper proposed to change coal seam and strata energy liberation pattern., which is the coupling effect between mining covering layer and top coal caving mining and combined with local clearance kick technologies. Based on the realistic observational study of rock pressure in mine, the results showed that the deep fully-mechanized top coal caving mining in high stress areas can effectively relieve the dangerous degree of dynamic pressure phenomenon; mining covering layer method can relieved the high stress on working face, at the same time relieve the regional pressure on fully mechanized top-coal caving high stress areas, make the abutment pressure concentration coefficient for 1.39 in front of the working face, affects scope for 36m, change the mechanical condition of dynamic pressure which is caused by high stress totally, and reduce the dynamic pressure intensity greatly.