条带开采煤柱支承压力与塑性区分布规律研究  

Study on distribution law of supporting pressure and plastic zone of coal pillar in strip mining

作　　者：谷拴成[1] 杨超凡 王盼[1] 牛宏新 GU Shuancheng;YANG Chaofan;WANG Pan;NIU Hongxin(School of Architecture and Civil Engineering,Xi’an University of Science and Technology,Xi’an 710054,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

出　　处：《矿业安全与环保》2021年第2期1-6,共6页Mining Safety & Environmental Protection

基　　金：国家自然科学基金项目(51508462)。

摘　　要：为了对条带开采煤柱支承压力与塑性区分布规律进行研究,采用理论分析、数值模拟及现场监测的方法,通过考虑采空区上覆煤岩体成拱效应,确定出煤柱支承压力分布情况。结合煤柱支承压力分布情况,根据玉华煤矿工程条件,采用ANSYS15.0软件模拟计算不同采空区宽度(100~260 m)、不同工作面埋深(400~600 m)的煤柱最大塑性区宽度,并对玉华煤矿2410工作面回风巷道护巷煤柱的最大塑性区进行监测。研究结果表明:依据所提出的煤柱支承压力计算方法,模拟计算出的煤柱最大塑性区宽度和现场监测结果一致。给出了确定煤柱支承压力分布的计算方法,以及依据该方法计算出的煤柱最大塑性区分布规律,可为煤柱留设宽度设计提供依据。In order to study the distribution law of supporting pressure and plastic zone of coal pillar in strip mining,by means of theoretical analysis,numerical simulation and field monitoring methods,the supporting pressure distribution of coal pillar is determined by considering the arching effect of overlying coal and rock mass in goaf.Combined with the coal pillar supporting pressure distribution,according to the engineering conditions of Yuhua Coal Mine,the maximum plastic zone width of coal pillar with different goaf width(from 100 m to 260 m)and different working face buried depth(from 400 m to 600 m)was calculated by ANSYS15.0 simulation,and the maximum plastic zone of coal pillar with return airway in 2410 working face of Yuhua Coal Mine was monitored.The research results show that the maximum plastic zone width of coal pillar calculated by simulation is consistent with the field monitoring results according to the proposed calculation method of coal pillar supporting pressure.The calculation method to determine the supporting pressure distribution of coal pillar and the distribution law of the maximum plastic zone of coal pillar calculated by this method are given,which can provide a basis for the design of coal pillar width.

关 键 词：成拱效应 煤柱 支承压力 塑性区宽度 理论分析 数值模拟 

分 类 号：TD325[矿业工程—矿井建设]