高韧性较薄直接顶特厚煤层四柱综放支架适应性和优化研究  

Adaptability analysis and optimization study of four-leg shield caving support in ultra thick seam with high toughness and thinner immediate roof

作　　者：张金虎 王国法[1,2] 杨正凯[3] 吴士良[4] ZHANG Jinhu;WANG Guofa;YANG Zhengkai;WU Shiliang(Coal Mining Research Branch,China Coal Research Institute,Beijing 100013,China;Coal Mining and Designing Department,Tiandi Science and Technology Co Ltd,Beijing 100013,China;China Coal Research Institute,Beijing 100013,China;College of Mining and Safety Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266590,China)

机构地区：[1]煤炭科学研究总院开采研究分院,北京100013 [2]天地科技股份有限公司开采设计事业部,北京100013 [3]煤炭科学研究总院,北京100013 [4]山东科技大学矿业与安全工程学院,山东青岛266590

出　　处：《采矿与安全工程学报》2018年第6期1164-1169,1176,共7页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51704157);国家重点研发计划项目(2017YFC0804308);中国煤炭科工集团科技创新创业资金专项项目(2018QN018)

摘　　要：为得出特厚煤层四柱大采高综放支架适应性和合理结构参数,采用现场实测、理论计算和三维仿真动态优化设计的方法对酸刺沟特厚煤层综放开采支架结构和参数进行研究。结果表明:该矿ZF15000/26/42支架适应性较差;直接顶韧性较大不易垮落造成顶煤破碎和顶煤断裂线前移,加剧支架前后立柱受力不均衡程度;直接顶较薄充填不满采空区,基本顶有约6.39m的下沉空间;支架有效控顶距减小和缩量不够是矿压显现强烈和支架压死的根本原因。采用提高安全阀开启压力和采空区充填率的方法,可减小工作面顶板下沉量至150mm。为提高煤炭采出率,针对顶板难冒、前柱受力较大等特点,优化支架结构和参数,设计立柱前强后弱、合力作用点前移、新型马鞍板柱窝等结构的ZF21000/25/45超强力放顶煤液压支架,经实践检验可满足顶板控制要求。In order to obtain adaptability of four-leg shield caving support and reasonable support and parameters in ultra thick seam mining,use measurement methods and theoretical calculations and 3D simulation dynamic optimization design to research the fully-mechanized caving coal face in Suancigou. The study results showed that the adaptability of ZF15000/26/42is poor.The direct top toughness is not easy to fall,causing the top coal to break and the top coal fracture line to move forward.It exacerbated the degree of equilibrium discontinuity around the support.The thinner immediate roof cannot fill the mined-out area fully.The basic top has a sinking space of about 6.39m.The effective control top distance reduction and insufficient shrinkage of the bracket are the root causes of strong mine pressure and the crushing of the bracket.Practice shows that improving the relief valve opening pressure and the gob filling rate were adopted to realize stents "finite deformation"working condition and "all face a line double tenth coal"combining technology can decrease the roof subsidence to 150mm.To improve the coal recovery rate,according to the characteristics of the difficulty of the large roof and the anterior stress,optimization of support parameter.s and column layout and design ZF21000/25/45 super caving hydraulic support whose force acting point making forward and was designed new Saddle plate column nest and other structures and the front pillar is stronger.The ZF21000/25/45 super-strength caving coal hydraulic support can be tested to meet the roof control requirements.

关 键 词：高韧性 较薄直接顶 特厚煤层 适应性 四柱综放支架 优化设计 

分 类 号：TD353[矿业工程—矿井建设]