钻孔加密过程中的孔周应力响应特征研究  

Response Characteristics of Stress Around Borehole During Drilling Densification

作　　者：王圣程 陈学习[2] 苏善杰 李海鉴 张云峰 胡依鲁 WANG Shengcheng;CHEN Xuexi;SU Shanjie;LI Haijian;ZHANG Yunfeng;HU Yilu(School of Civil Engineering,Xuzhou University of Technology,Xuzhou 221018,China;School of Mine Safety,North China Institute of Science and Technology,Langfang 065201,China;School of Geology and Mining Engineering,Xinjiang University,Urumqi 830046,China;Xuzhou Safe-zike Polymer Materials Co.Ltd.,Xuzhou 221008,China)

机构地区：[1]徐州工程学院土木工程学院,江苏徐州221018 [2]华北科技学院矿山安全学院,河北廊坊065201 [3]新疆大学地质与矿业工程学院,新疆乌鲁木齐830046 [4]徐州赛孚瑞科高分子材料有限公司,江苏徐州221008

出　　处：《徐州工程学院学报（自然科学版）》2023年第1期50-54,共5页Journal of Xuzhou Institute of Technology(Natural Sciences Edition)

基　　金：国家自然科学基金项目(51904270);江苏高校哲学社会科学研究项目(2021SJA1120);江苏省科技副总项目(FZ20220397);江苏省产学研合作项目(BY2022771)。

摘　　要：为分析钻孔加密过程中的孔周应力响应特征,根据河南某矿的实际情况,采用ABAQUS软件对钻孔加密过程应力响应进行模拟.结果表明:巷道周围的应力较为集中,破坏区域主要存在于巷道周围数米范围内,水平两侧的煤体破碎程度明显大于上下两侧;钻孔施工后,钻孔周围应力大幅度提高,随着钻孔间距的减小,钻孔间应力出现叠加现象,煤体产生较大塑性流动,形成了钻孔间相互沟通的裂隙场;钻孔水平方向裂隙发育多于垂直方向,且随着钻孔深度的增加,孔周应力呈不均匀性减小,钻孔周围裂隙也逐步减少.该研究有助于确定合理封孔深度,实现瓦斯高浓度抽采.In order to analyze the response characteristics of stress around the borehole during the drilling densification process,ABAQUS software was used to simulate the stress response based on an actual situation of one mine in Henan.The results showed that the stress around the roadway was relatively concentrated,and the damage area mainly existed in the range of several meters around the roadway.The degree of coal fragmentation on both sides of the horizontal side was significantly greater than that on the upper and lower sides.After the drilling construction,the stress around the borehole was greatly increased.With the decrease of the borehole spacing,the stress between the borehole was superposed,and the coal body produced a large plastic flow,forming a fracture field linked up to each other between boreholes.The horizontal fractures were more developed than that in the vertical fractures.With the increase of the borehole depth,the stress around the borehole decreased unevenly,and the fractures around the borehole also decreased gradually.The research results are helpful to determine reasonable borehole sealing depth with high-concentrated gas drainage.

关 键 词：钻孔加密 钻孔间距 受力情况 裂隙分布 

分 类 号：TD712[矿业工程—矿井通风与安全] TU431[建筑科学—岩土工程]