运河煤矿孤岛充填工作面应力分布及微震活动规律  

Stress Distribution and Microseismic Activity Law of Island Filling Working Face in Yunhe Coal Mine

作　　者：李鹏 宋解放 LI Peng;SONG Jiefang(Bayangaole Coal Mine,Huangtaolegai Coal Mine Co.,Ltd.;School of Mines,China University of Mining and Technology)

机构地区：[1]内蒙古黄陶勒盖煤炭公司巴彦高勒煤矿,内蒙古自治区鄂尔多斯市017000 [2]中国矿业大学矿业工程学院

出　　处：《现代矿业》2023年第4期50-54,共5页Modern Mining

摘　　要：孤岛充填工作面由于控制顶板上覆岩层下沉而使工作面超前支承压力变得复杂,同时顶板破断形式也不同于常规孤岛工作面。为了更好地控制孤岛充填工作面采场围岩,以运河煤矿C8301工作面为背景,研究超前支承压力变化趋势和煤柱变形情况,同时也分析了工作面回采过程中微震活动规律。研究得出:①孤岛充填工作面初次来压步距明显增加,工作面推进至120 m左右时发生初次来压;②孤岛充填工作面两侧煤柱总体变形量较小,可维持煤柱的相对稳定;③孤岛充填工作面回采过程中,有明显来压的特征,但是来压强度远小于正常孤岛工作面。该研究为矿井实现深部孤岛充填工作面安全开采提供了指导。The advanced abutment pressure of the working face is complicated due to the control of the subsidence of the overlying strata of the roof,and the roof breaking form is also different from the convention al island working face.In order to better control the surrounding rock of the island filling working face,tak ing the C8301 working face of Yunhe Coal Mine as the background,the change trend of the advance abut ment pressure and the deformation of the coal pillar are studied,and the microseismic activity law during the mining process of the working face is also analyzed.The results show that:①The first weighting step of the island filling working face increases obviously,and the first weighting occurs when the working face ad vances to about 120 m.②The overall deformation of coal pillars on both sides of the island filling face is small,which can maintain the relative stability of coal pillars.③In the mining process of island filling work ing face,there are obvious characteristics of pressure,but the pressure intensity is much smaller than that of normal island working face.This study provides guidance for the safe mining of deep island filling working face.

关 键 词：冲击地压 孤岛充填工作面 应力分布 微震 

分 类 号：TD823.7[矿业工程—煤矿开采]