中厚煤层沿空留巷巷旁柔模混凝土充填体合理宽度研究及应用  

Research and Application of Reasonable Width of Flexible-formwork Concrete Fillings beside Gob-side Entry Retaining in Medium-thickness Coal Seam

作　　者：郝晓飞 郝兵元[1] 谢益盛 张涛[1] HAO Xiaofei;HAO Bingyuan;XIE Yisheng;ZHANG Tao(School of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Xinjing Mine Coal Industry Co.,Ltd.,Yangquan 045000,China)

机构地区：[1]太原理工大学矿业工程学院,山西太原030024 [2]山西新景矿煤业有限责任公司,山西阳泉045000

出　　处：《矿业安全与环保》2019年第5期60-65,共6页Mining Safety & Environmental Protection

摘　　要：针对新景矿3213综采工作面的实际情况,采用数值模拟的方法对中厚煤层沿空留巷巷旁充填体宽度分别为0.8、1.0、1.2、1.5、2.0 m条件下的围岩变形情况进行分析,并通过充填体的承载力进行验算,确定柔模混凝土充填体的合理宽度为1.2 m。3213综采工作面留巷期间基本支护方式为锚杆+锚索+W型钢带+金属菱形网;巷旁采用宽度为1.2 m的柔模混凝土充填体支护,混凝土上安设锚栓与钢带;临时加强支护采用“一梁三柱”的方式,临时加强支护后在充填墙体两侧施工2排锚索。观测结果表明,留巷期间巷旁充填体保持稳定,围岩顶底板及两帮的最大移近量分别为293、211 mm,满足沿空留巷的使用要求。In view of the actual situation of 3213 fully mechanized working face in Xinjing Coal Mine,in the condition that the width of fillings beside the gob-side entry retaining in medium-thickness coal seam was 0.8 m,1.0 m,1.2 m,1.5 m and 2.0 m respectively,the surrounding rock deformation was analyzed by means of numerical simulation.By checking the bearing capacity of the fillings,it was concluded that the reasonable width of the flexible-formwork concrete fillings was 1.2 m.During the retaining of roadway in 3213 fully mechanized working face,the basic supporting mode is“bolt”+“anchor cable”+“w-shaped steel belt”+“metal diamond mesh”;flexible-formwork concrete fillings with a width of 1.2 m was adopted to support the roadway,and anchors and steel strips were installed on the concrete;the temporary reinforced support adopted the method of“one beam and three columns”,after the temporary reinforced support,two rows of anchor cables were constructed on both sides of the filling wall.The observation results show that the fillings beside roadway during the retaining remains are stable,the maximum deformation of the roof and floor of the surrounding rock and the two sides is 293 mm and 211 mm respectively,which meets the requirements for the use of the gob-side entry retaining.

关 键 词：中厚煤层 沿空留巷 围岩控制 柔模混凝土 充填体宽度 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]