采动影响下不规则煤柱稳定性分析与控制  

Analysis and control of the stability of irregular coal pillars under the influence of mining activities

作　　者：文龑 王士朋 韩传磊 赵燕席 Wen Yan;Wang Shipeng;Han Chuanlei;Zhao Yanxi(College of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Wenshang Yiqiao Mine Co.,Ltd.,Jining 272500,China)

机构地区：[1]山东科技大学能源与矿业工程学院,山东青岛266590 [2]汶上义桥煤矿有限责任公司,山东济宁272500

出　　处：《煤炭与化工》2024年第12期16-21,共6页Coal and Chemical Industry

摘　　要：为确定义桥煤矿2305工作面回采时3处不规则煤柱的稳定程度,首先对3处不规则煤柱的稳定系数进行了理论计算分析,进一步采用数值模拟方法研究工作面采动影响下3处不规则煤柱的应力分布特征及稳定性。研究结果表明:3处不规则煤柱的稳定系数分别为1.19、1.33、1.25,判断3处煤柱能够在工作面回采后保持稳定状态;在工作面回采过程中,监测到3处不规则煤柱的应力最大值分别为61.1、60.3、42.5 MPa,峰值应力集中系数分别为3.76、3.71、2.62;随着工作面推进距离的增加,3处不规则煤柱的应力分布大体呈马鞍形,内部存在明显的弹性核区。综合评定工作面回采时,3处不规则煤柱能够保持稳定,并制定相应的采动影响下不规则煤柱失稳诱发冲击灾害的控制方法。To assess the stability of three irregular coal pillars during mining in No.2305 face,theoretical calculations were first conducted to analyze the stability coefficients of these pillars.Subsequently,numerical simulation methods were employed to investigate the stress distribution characteristics and stability of the irregular coal pillars under the influence of mining activities.The research findings indicated that the stability coefficients of the three irregular coal pillars were 1.19,1.33,and 1.25 respectively,suggesting they could maintain stability after the mining face extraction.During the extraction process,the maximum stresses measured on these irregular coal pillars were 61.1 MPa,60.3 MPa,and 42.5 MPa respectively,with peak stress concentration factors of 3.76,3.71,and 2.62.As the mining face advanced,the stress distribution of the irregular coal pillars generally exhibited a saddle-shaped pattern,with evident elastic core zones.Based on comprehensive assessment,it was concluded that the irregular coal pillars could remain stable during mining face extraction,and corresponding control measures were formulated to prevent instability-induced impact disasters caused by mining activities.

关 键 词：不规则煤柱 煤柱稳定系数 弹性核区 冲击地压防治 

分 类 号：TD325[矿业工程—矿井建设]