三软煤层大采高孤岛工作面支架参数优化设计  

Hydraulic Support Parameters Optimization Design for Large Mining Height and Island Working Face in Three-Soft Coal Seam

作　　者：庞义辉[1,2] 郭继圣 

机构地区：[1]天地科技股份有限公司开采设计事业部,北京100013 [2]煤炭科学研究总院开采设计研究分院,北京100013 [3]北京煤矿设计咨询公司,北京100120

出　　处：《煤炭工程》2015年第8期60-63,共4页Coal Engineering

基　　金：国家重点基础研究发展计划(973计划)资助项目(2014CB046302)

摘　　要：为了解决小康煤矿三软煤层大采高孤岛工作面顶板与煤壁控制难题,采用理论计算与数值模拟方法分析对比了孤岛工作面与正常工作面顶板控制的差异,并进行了支架参数优化设计。研究结果表明:受两侧采空的影响,孤岛工作面顶板岩层的应力、位移、破坏区均明显高于正常工作面,导致顶板与煤壁难以控制;基于支架支护强度与顶板下沉量关系曲线,确定支架支护强度应不小于1.3MPa;通过分析支架初撑力与煤壁水平位移量曲线,确定支架初撑力应不小于1.0MPa,并通过提高乳化液泵额定压力来弥补远距离供液沿程压力损失;液压支架型号确定为ZY13500/31/65,采用伸缩梁与护帮板连体结构形式,支架护帮高度为3.0m,设计采用抬底座机构,提高支架对底板的适应性。Aiming at the roof and rib controlling in large mining height island working face in soft coal seam with soft rock and roof in Xiaokang Coal Mine, the difference of roof controlling between island and normal working face was analyzed and compared using theoretical analysis and numerical modeling, and the hydraulic support parameters were optimized. The results show that the stress, displacement, failure zone in island working face are more significant than the normal working face, which causes difficulty in roof and rib control. The minimum supporting intensity of hydraulic support is 1.3MPa according to the supporting intensity - roof subsidence curve, and the minimum setting load is 1. 0MPa according to the setting load - rib horizontal displacement curve. The hydraulic support type is ZY13500/31/65, using telescopic girder and face guard structure, the rib protection height is 3m. And the base - lifting structure was designed to improve the adaptation to the floor.

关 键 词：三软煤层 孤岛工作面 数值模拟 支护强度 护帮机构 

分 类 号：TD355.4[矿业工程—矿井建设]