玉华煤矿综采工作面面间煤柱合理尺寸研究  

Study on the reasonable size of coal column in surface of fully mechanized mining in Yuhua Coal Mine

作　　者：谷拴成[1] 张志飞 杨超凡 袁增云 霍小泉 GU Shuancheng;ZHANG Zhifei;YANG Chaofan;YUAN Zengyun;HUO Xiaoquan(School of Architecture and Civil Engineering,Xi'an University of Science and Technology,Xi'an 710054,China;Tongchuan Mining Co.,Ltd.,Tongchuan 727000,China)

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710054 [2]陕西陕煤铜川矿业有限公司,陕西铜川727000

出　　处：《中国矿业》2022年第3期81-87,共7页China Mining Magazine

摘　　要：合理尺寸的煤柱既可以保证巷道的稳定性,也可以提高煤炭的回收率。本文以铜川玉华煤矿为背景,通过应力动态监测、理论推导与工程验证相结合的方法确定区段煤柱合理留设宽度。通过对2410工作面进行应力监测,发现相较于采空区侧煤柱,实体煤的承载能力较高,应力增量较大,在采动影响下应力峰值向深部转移时间晚。为进一步确定煤柱具体留设宽度,考虑工作面开采后煤岩体垮落的成拱效应,建立上覆岩体向煤柱传递荷载的传力拱模型,对煤柱支承压力分布规律进行研究,在明确荷载传递机理与煤柱受力后,结合极限平衡理论与刚塑性理论,得出综采工作面面间煤柱的合理留设宽度和煤帮加固范围。根据研究成果进行工程验证,巷道表面位移观测结果说明所设计的煤柱尺寸合理可靠。该研究结果对类似开采条件下的区段煤柱宽度确定具有参考意义。A reasonable size coal pillar can not only ensure the stability of the roadway,but also increase the recovery rate of coal.Taking Tongchuan Yuhua Coal Mine as the background,the reasonable leaving width of the section coal pillars is determined by the method of combining stress dynamic monitoring,theoretical derivation and engineering verification.Stress monitoring on the 2410 working face found that compared with the coal pillars on the side of the goaf,solid coal has a higher bearing capacity and a larger stress increase.Under the influence of mining,the peak stress transfer time to the deep part is later.In order to further determine the specific width of the coal pillars,considering the arching effect of coal and rock mass collapse after mining at the working face,a force-transmitting arch model of the overlying rock mass transferring load to the coal pillars is established,and the distribution law of the supporting pressure of the coal pillars is studied.After clarifying the load transfer mechanism and the force of the coal pillar,combining the limit equilibrium theory and the rigid plastic theory,the reasonable leaving width of the coal pillar between the fully mechanized mining face and the reinforcement range of the coal bank are obtained.According to the research results,the engineering verification is carried out,and the observation results of the roadway surface displacement show that the designed coal pillar size is reasonable and reliable.The research results have reference significance for the determination of the section coal pillar width under similar mining conditions.

关 键 词：煤柱宽度 采空区 应力转移 成拱效应 塑性区 

分 类 号：TD322[矿业工程—矿井建设]