浆体膨胀复合材料充填开采极限充填步距研究  

Study on ultimate filling pace of backfill mining with slurry swelling compound material

作　　者：朱卫兵[1] 李竹[1] 轩大洋[1] 徐敬民 王向宏 ZHU Weibing;LI Zhu;XUAN Dayang;XU Jingmin;WANG Xianghong(Key Laboratory of Deep Coal Resource Mining,Ministry of Education of China,School of Mines,China University of Mining ＆ Technology,Xuzhou,Jiangsu 221116,China;Faculty of Engineering,University of Nottingham,University Park,Nottingham,Nottinghamshire NG7 2RD,United Kingdom;Zibo Wangzhuang Coal Mine,Zibo,Shandong 255400,China)

机构地区：[1]中国矿业大学深部煤炭资源开采教育部重点实验室,矿业工程学院,江苏徐州221116 [2]诺丁汉大学工程学院,诺丁汉郡诺丁汉NG72RD [3]淄博市王庄煤矿有限公司,山东淄博255400

出　　处：《采矿与安全工程学报》2018年第5期991-996,共6页Journal of Mining & Safety Engineering

基　　金：国家重点研发计划项目(2016YFC0501100);国家自然科学基金项目(51604258,51604259)

摘　　要：长壁充填开采中充填步距是事关充填密实程度、减沉效果及生产效率的关键参数。为了确定浆体膨胀复合材料充填开采中的充填步距,建立了充填体与顶板压力作用关系的力学模型,结合关键层理论确定了直接顶载荷、充填体载荷与充填步距之间的函数表达式。以王庄煤矿充填开采工作面为背景,理论分析了井下充填体三向应力状态下的强度增长特征,得出浆体膨胀复合材料充填体保持长期稳定的强度条件;分析了采空区内不同龄期的浆体膨胀复合材料充填体的受力状态,得出了保证充填体稳定及减沉控制效果的极限充填步距为7.2m。研究成果在王庄煤矿试验工作面得到了成功应用,为类似条件下充填步距的合理确定提供参考。In order to determine the filling pace of backfill mining with slurry swelling compound material, a mechanical model of the action relationship between the filling body and roof pressure was established. According to the key stratum theory, the functional expression of the immediate roof load, filling body loading and the filling pace were determined. Take the mining working face in Wangzhuang coal mine as the background, the increase characteristic of the underground filling body strength under three-dimensional stress state was theoretically analyzed and the strength condition to insure the long-term stability of the slurry swelling compound material filling body was obtained. The stress states of slurry swelling compound material filling body with different age in the gob were analyzed and the ultimate filling pace to ensure the stability of the filling body and to reduce subsidence effects is obtained as 7.2 m.

关 键 词：充填步距 浆体膨胀复合材料 关键层 充填开采 地表沉陷 

分 类 号：TD823[矿业工程—煤矿开采]