崔魏, 崔峰, 潘夏辉,等.近断层深埋巷道掘进变形破坏规律[J].河南理工大学学报（自然科学版）,2022,41(4):21-29.

CUI W, CUI F, PAN X H,et al.Deformation and failure laws of deep roadway excavation near a fault[J].Journal of Henan Polytechnic University(Natural Science) ,2022,41(4):21-29.

近断层深埋巷道掘进变形破坏规律

崔魏1, 崔峰2, 潘夏辉3, 张勃阳3

1.陕西陕煤陕北矿业有限公司 韩家湾煤炭公司，陕西 榆林 719100;2.陕西延长石油矿业有限责任公司 魏墙煤业公司，陕西 榆林  719100;3.河南理工大学 能源科学与工程学院，河南 焦作 454000

摘要:深埋巷道掘进遇到断层时，其围岩变形破坏特征发生极大变化，严重影响安全生产。为此，以海石湾煤矿一条深埋进风巷道为例，研究其临近断层掘进过程中围岩应力、位移、塑性区和剪应变演化特征，分析断层倾角、破碎带宽度和侧压力系数对巷道围岩稳定性的影响。结果表明：当深埋巷道与断层净间距小于5 m时，随着深埋巷道掘进移近断层，巷道周边塑性区岩体剪应变逐渐增大，进而导致深埋巷道围岩位移呈指数式增长；随着侧压力系数增大，深埋巷道顶底板塑性区破坏深度逐渐增大，帮部则出现先减小后增大的变化规律；当深埋巷道与断层净间距大于5 m时，断层倾角和宽度对深埋巷道围岩位移与塑性区分布影响很小，反之，深埋s巷道位移在断层倾角90° 时最大，且与破碎带宽度呈指数衰减关系。

关键词:深埋巷道;断层;应力;位移;塑性区;剪应变;断层倾角;破碎带宽度;侧压力系数

doi:10.16186/j.cnki.1673-9787.2020110068

基金项目:国家自然科学基金资助项目（51974293）；江苏省青年科学基金资助项目（BK20180658）

收稿日期:2020/11/23

修回日期:2021/01/21

出版日期:2022/07/15

Deformation and failure laws of deep roadway excavation near a fault

CUI Wei1, CUI Feng2, PAN Xiahui3, ZHANG Boyang3

1.Hanjiawan Coal Co. ， Ltd. ， Shaanxi Shaanmei Nrothern Shaanxi Coal Mining Industry Limited Company，Yulin  719100 ， Shaanxi， China;2.Weiqiang Coal Industry Company， Shaanxi Yanchang Petroleum Mining Limited Company，Yulin  719100，Shaanxi，China;3.School of Energy Science and Engineering，Henan Polytechnic University，Jiaozuo  454000，Henan，China

Abstract: When the excavation of deep roadway encountersa fault,the deformation and failure characteristics of surrounding rock change greatly, which seriously affects the safety production. Therefore , taking a deeply buried wind tunnel in Haishiwan coal mine as an example,the variation and development characteristics of surrounding rock stress , deformation , plastic zone and shear strain during excavation were studied. The influences of fault dip angle,fracture zone width and lateral pressure coefficient on the stability of roadway surrounding rock were analyzed. The results showed that:When the net distance between the deep buried roadway and the fault was less than 5 m,the shear strain of the rock mass in the plastic zone around the roadway would gradually increase as the roadway approached the fault,leading to an exponential increase in the surrounding rock mass displacement;With the increase of the lateral pressure coefficient, the failure depth of the surrounding rock plastic zone of roof and floor gradually increased, while the upper part first decreased and then increased;When the net distance between the fault and the roadway was greater than 5 m，the fault dip angle and width had little influence on the convergent displacement and plastic zone distribution of the surrounding rock of the roadway. On the contrary，the convergent displacement of the roadway reached its maximum at the fault dip angle of 90°，and its relation with the width of the fracture zone was exponential attenuation.

Key words:deep roadway;fault;stress;displacement;plastic zone;shear strain;fault dip angle;fault zone width;lateral pressure coefficient

近断层深埋巷道掘进变形破坏规律_崔魏.pdf