不同倾角煤岩组合煤柱破坏规律及稳定性控制研究  

Study on Failure Law and Stability Control of Coal Pillar in Coal-rock Combination with Different Dip Angles

作　　者：姚士茂 YAO Shimao(CHN Energy Shendong Coal Buertai Coal Mine,Ordos 017000,China)

机构地区：[1]国能神东煤炭布尔台煤矿,内蒙古鄂尔多斯017000

出　　处：《煤炭技术》2025年第1期88-92,共5页Coal Technology

摘　　要：以神东某矿为研究背景,采用理论分析、模拟试验,模拟研究了不同倾角煤-岩组合体强度关系及损伤演化规律,研究了不同倾角组合煤岩体单轴压缩下力学特性及破坏特征,分析了组合体中煤-岩不同倾角交界面对其整体变形破坏的影响,提出了组合体煤柱锚喷锚杆强化支护技术。结果表明:随着煤岩组合体倾角增加,峰值强度降低,应力-应变曲线线性行为发生时间变短。煤岩组合体产生滑移破坏分界为30°~40°;倾角越小,煤岩组合体加载过程中越难产生损伤,且产生损伤过程应变越大;反之,倾角越大,越容易发生损伤。倾角较小时,煤岩组合体受力过程中不易变形,且需要很大的加载力才能使煤岩组合体产生损伤破坏。所提组合体煤柱锚喷锚杆强化支护效果显著大于普通支护效果。通过对煤岩组合体损伤演化进行分析,可为现场监测及煤岩体失稳破坏前兆提供判据。Taking a mine in Shendong as the research background,the strength relationship and damage evolution law of coal-rock combination with different dip angles are simulated and studied by theoretical analysis and simulation test.The mechanical properties and failure characteristics of coalrock combination with different dip angles under uniaxial compression are studied.The influence of different dip angles of coal-rock interface on its overall deformation and failure is analyzed,and the strengthening support technology of bolt-shotcrete bolt in coal pillar of combination is put forward.The results show that with the increase of the inclination angle of the coal-rock combination,the peak strength decreases,and the linear behavior of the stress-strain curve becomes shorter.The boundary of sliding failure of coal-rock combination is 30°-40°;the smaller the dip angle is,the more difficult it is to produce damage during the loading process of the coal-rock combination,and the greater the strain during the damage process is.On the contrary,the larger the dip angle is,the more prone to damage.When the inclination angle is small,the coal-rock combination body is not easy to deform during the stress process,and a large loading force is required to cause damage to the coal-rock combination body.The strengthening support effect of bolt-shotcrete bolt in coal pillar of the proposed combination is significantly greater than that of ordinary support.By analyzing the damage evolution of coal-rock combination,it can provide a criterion for on-site monitoring and the precursor of instability and failure of coal-rock mass.

关 键 词：煤岩组合体 失稳破坏 力学特性 损伤演化 

分 类 号：TD313[矿业工程—矿井建设] TU451[建筑科学—岩土工程]