Research Institute of Special Mining.Anhui University of Science and Technology Province and MOEJoint Key Lab of Mine Safety and High Efficient Mining SDIC Xinji Energy Company Limited

为了确保超长大采高工作面顺利过大落差正断层,采用相似材料模拟和数值模拟试验,分析了大落差正断层及不同采高、不同工作面长度条件下综采工作面围岩力学特征。试验结果分析表明,大落差断层的存在是影响工作面顶板下沉不连续、支承压力演化不均匀的主要因素,而工作面采高和长度的增加对支承压力分布的影响小于对顶板下沉的影响,工作面顶板最大下沉量与采高呈指数关系、与工作面长呈对数关系。提出了整体从上盘留顶破底调斜推进、局部辅助爆破破顶过F18断层的方法与技术方案,采用具有良好控顶护帮功能的ZZ13000-27/60液压支架,采取超高段巷道提前接顶、破碎区注浆加固等技术措施,实现了超长大采高综采面安全、快速过大落差断层,工程应用效果良好。

in order to ensure overong high cutig full - mechanized coal mining face suc.essilly pass through the high drop nornal fault.the paper analyzed the surrounding rock mechanics features of thefally mechanized coal mining face under the high drop nomal fut ifrent mining height an dfferent coal mining face length.The est analysis showed that the high drop faut exsted was the majorfactors infuenced to the discontinuous sutsidence of the roof above the coal mining face and the inhonogeneous evltion of the support pressure,but the mining height and face lengh increased of the coal mining face would have a lss ifuence to the support pressure distribution than the roof subsidence,the max subsidence value of the roof above the cal mining face woul be an exponential rlationship o the mining height and woud be alogarihm relationship to the length of the cal mining fac .A method and technical pan was provided that the coal mining face at the to wall wculd keep the roof and break the foor.would be pushe forward with the nclination adjustment and wauld pass through F18 fault lncally ith an auillay basting of the roof.with an applcation of ZZ1300-27/60 hyarauic powered support with good oo control and sidewall protection funtions ,the technical meaures ofthe advance roof control of the mine ultra high secion roaiwaythe grouting reinforcemen of the broken secion of the mine roadway and others were conducted,the overiong high cutting rul echanized coal mining face was realzed to sately and raidly pass through the high drop faut and excellent engineering applcation result were obtained.

国家自然科学基金资助项目(51374011)；