超长综放工作面超前支承压力显现规律研究  

Study on manifestation law of advanced support pressure in ultra long fully-mechanized caving face

作　　者：张鹏 Zhang Peng(Ningxia Tiandi Benniu Industrial Group Co.,Ltd.,Shizuishan 753000,China)

机构地区：[1]宁夏天地奔牛实业集团有限公司,宁夏石嘴山753000

出　　处：《能源与环保》2024年第6期249-253,260,共6页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家重点研发计划(2018YFC0808300)。

摘　　要：为掌握综放工作面矿山压力显现规律,采用数值模拟计算的方法建立综放工作面物理力学模型进行分析。结果表明,工作面支架所受载荷主要是顶煤和基本顶变形运动产生的变形压力,故提高支架的初撑力和工作阻力对改善工作面顶板的结构状态、维护下位顶煤的稳定性有积极作用。工作面前方支承压力约呈抛物线分布,峰值位于煤壁前方4~8 m处,峰值点应力集中系数为1.3~1.7。In order to master the manifestation law of mine pressure in fully-mechanized caving face,numerical simulation method was adopted to establish a physical and mechanical model of fully-mechanized caving face for analysis.The results showed that the load on the working face support was mainly the deformation pressure produced by the deformation movement of the top coal and the basic roof.Therefore,increasing the initial support force and working resistance of the support had a positive effect on improving the structural state of the roof of the working face and maintaining the stability of the lower top coal.The supporting pressure in front of the working face was distributed approximately in a parabola,the peak was located at 4 m to 8 m in front of the coal wall,and the stress concentration coefficient at the peak point was between 1.3 and 1.7.

关 键 词：综放工作面 数值模拟 FLAC 3D 超前支承压力 

分 类 号：TD323[矿业工程—矿井建设]