Jinneng Holding Equipment Manufacturing Group Datong Electromechanical Equipment Co., Ltd. Central Machine Factory

针对大同机电装备有限公司中央机厂对7.0m以上超大采高工作面开采时矿压显现剧烈、围岩控制困难、煤壁容易片帮、易发生顶板冒顶事故等问题,通过运用数值仿真、模型计算及实地测量方法对液压支架与围岩强度耦合性进行研究分析;通过对中央机厂15218工作面超大采高矿山压力测量分析,得出基岩厚度大、埋深浅的超大采高工作面具有明显的大小周期来压与动载矿压;通过对中央机厂15218工作面顶板的力学结构、支架支护阻力以及煤壁的力学结构、临界帮护力的研究,得出架型应选择两柱支撑掩护式液压支架,液压支架护帮结构应选择伸缩梁与护帮板分体结构;通过采用工程实践分析的方法对中央机厂15218工作面超大采高工作面液压支架进行了适应性评价分析,得出ZY21000/38/82D型液压支架可以满足中央机厂15218工作面超大采高工作面的实际生产要求。

In view of the problems of severe mine pressure behavior, difficult control of surrounding rock, easy coal wall fragmentation, roof caving accidents easy occurence and so on during the mining of super large mining height working faces above 7.0 m in Central Machinery Factory of Datong Electromechanical Equipment Co., Ltd., numerical simulation, model calculation, and field measurement methods are used to study and analyze the coupling of hydraulic support and surrounding rock strength; by measuring the mine pressure of the super large mining height at the 15218 working face of Central Machinery Factory, it Is found that the super large mining height working face with thick bedrock and shallow burial depth has obvious large and small periodic weighting and dynamic load mine pressure; through the study of the mechanical structure, support resistance, mechanical structure of coal wall, and critical gang support force of the roof of the working face at the 15218 working face of Central Machinery Factory, it is concluded that the hydraulic support with two pillar support and shield should be selected as the support type, and the hydraulic support and gang protection structure should be a separate structure of telescopic beam and gang protection plate; by using engineering practice analysis methods, adaptability evaluation analysis is conducted on the hydraulic support of the super large mining height working face at the 15218 working face of Central Machinery Factory. It is obtained that the ZY21000/38/82D type hydraulic support can meet the actual production requirements of the super high mining face in the 15218 working face of the Central Machinery Factory.