近距离煤层开采大巷煤柱受力特性评估  

Assessment of Stress Characteristics of Coal Pillars in Close Range Coal Seam Mining

作　　者：白武 王志乾 李光柱 韩明玉 BAI Wu;WANG Zhiqian;LI Guangzhu;HAN Mingyu

机构地区：[1]鄂尔多斯市昊华精煤有限责任公司,内蒙古鄂尔多斯017200

出　　处：《中国矿山工程》2024年第6期29-33,共5页China Mine Engineering

摘　　要：本文以内蒙古某煤矿近距离煤层开采条件为研究背景,对受上部煤柱传递应力影响下的大巷煤柱岩体受力和状态特性进行了研究,对不同煤柱留设宽度条件下煤柱受力规律进行了分析,并利用神经网络模型实现了对煤柱特性的评估。研究结果表明在近距离煤层开采条件下,上层煤柱的集中应力会向下部煤柱传递,进而造成下部煤柱应力叠加,同时带来煤体中破碎区和塑性区范围的明显增加,随着煤柱宽度的减小,煤柱应力集中程度也进一步增加。通过构建的神经网络模型可以实现对近距离煤层开采大巷煤柱应力和状态的有效评估。This article takes the close range coal seam mining conditions of a coal mine in Inner Mongolia as the research background.This study was conducted on the stress and state characteristics of the rock mass of the main roadway coal pillar under the influence of stress transmission from the upper coal pillar,and the stress law of the coal pillar under different coal pillar widths was analyzed.The research results indicate that under the conditions of close range coal seam mining,the concentrated stress of the upper coal pillar will be transmitted to the lower coal pillar,causing stress superposition in the lower coal pillar.At the same time,it will significantly increase the range of the fracture zone and plastic zone in the coal body.As the width of the coal pillar decreases,the degree of stress concentration in the coal pillar also further increases.The constructed neural network model can effectively evaluate the stress and state of coal pillars in close range coal seam mining.

关 键 词：煤柱 受力特性 近距离煤层 神经网络模型 

分 类 号：TD823[矿业工程—煤矿开采]