刀柱充填工作面采充间隔宽度及充填体强度指标.pdfVIP

学兔兔 第18卷第6期 (总第115期) 煤 矿 开 采 Vo1．18No．6(Series No．115) 2013年12月 C0AL MINING TECHNOLOGY December 2013 刀柱充填工作面采充间隔宽度及充填体强度指标 刘鹏亮 (天地科技股份有限公司开采设计事业部，北京 100013) [摘 要] 根据刀柱工作面煤柱与空区相间布置的特点，提出刀柱工作面充填开采的技术思路 是将整个过程分为煤房开采和煤柱回收2个阶段进行。煤柱的回收是在第1阶段充填形成的充填体柱 支撑顶板条件下实现。由于刀柱工作面采留尺寸均较小，为确保煤柱 (充填体柱)稳定性，对空区的 充填须及时进行。介绍了2个阶段开采与充填最大间隔宽度及充填体强度指标的确定方法：应用扩大 压力拱理论计算第1阶段未充填区煤柱载荷和第2阶段未充填区充填体柱载荷，结合煤柱 (充填体 柱)稳定性系数确定工作面第1，2阶段开采与充填最大间隔宽度以及第1阶段充填体强度，最后采 用数值模拟根据地表移动变形控制要求确定第2阶段充填体强度。 [关键词] 刀柱充填工作面；采充间隔宽度；充填体强度；扩大压力拱；充填体柱稳定性系数 [中图分类号]TD823．7 [文献标识码]A [文章编号]1006—6225(2013)06—0070．04 Gap Distance between Mining and Stowing and Stowing Body’S Strength Index in Pillar Stowing Mining Face LIU Peng．1iang (Coal Mining＆Designing Department，Tiandi Science＆Technology Co．，Ltd．，Beijing 10013，China) Abstract：2 phrases including coal room mining and coal pillar mining were put forward for pillar stowing mining．When stowing body supported roof，coal pillar could be mined．Mining and pillar dimensions were minor，stowing gob must be finished in time for coal— pillar stability．The method for calculating gap distance between mining and stowing and stowing body’s strength was introduced：en— larged pressure·-arch theory was applied to calculating coal—-pillar load in non—stowing area at 1 st phrase and stowing body load at 2nd phrase，maximum gap distance and stowing body strength at 1 st phrase was confirmed with stability coefficient of stowing body，final— ly，numerical simulation was used to obtain stowing