于春生, 韦四江, 张省,等.深部煤层大巷围岩破坏特征及强力锚固控制技术[J].河南理工大学学报（自然科学版）,2021,40(4):28-37.

YU C S, WEI S J, ZHANG S,et al.Surrounding rock failure characteristics and strong anchorage control technology ofcoal roadway in deep mine[J].Journal of Henan Polytechnic University(Natural Science) ,2021,40(4):28-37.

深部煤层大巷围岩破坏特征及强力锚固控制技术

于春生1, 韦四江2,3, 张省2, 王猛2,3, 神文龙2,3

1.河南焦煤能源有限公司古汉山矿，河南 焦作 454000;2.河南理工大学 能源科学与工程学院，河南 焦作 454000;3.煤炭安全生产河南省协同创新中心，河南 焦作 454000

摘要:河南焦煤能源有限公司赵固一矿北翼深部煤层回风大巷围岩节理化严重，在采掘支承压力作用下，矿压显现强烈，表现为两帮收缩、底鼓严重，巷道支护系统失效。针对此问题，采用数值模拟方法研究原岩应力场、采动应力场和支护应力场的“三场”应力分布特征，为巷道高强支护提供理论依据，同时应用再造承载层巷道围岩控制原理，提出北翼深部煤层回风大巷采 用“锚网索+喷浆+注浆+底板鸟笼锚索+补强锚索”围岩控制方案，并用数值模拟方法对不同支承压力作用下的巷道围岩变形、塑性区演化、支护受力和主应力差等进行研究，结果表明：随着支承压力集中系数增大，巷道断面收缩率逐渐增加，围岩塑性区由拱形演变为蝶形、蟹形和龟形；锚索在高支承压力作用下将逐步失效，主应力差呈现多峰值现象。工程实践表明，提出的强力锚固支护技术能有效控制围岩的变形破坏，具有较好的技术性和经济合理性。

关键词:煤层大巷;破坏特征;再造承载层;数值模拟;强力锚固

doi:10.16186/j.cnki.1673-9787.2020010026

基金项目:国家自然科学基金资助项目（51974104 ，51904093 ）；河南省科技攻关项目（182102210317 ）；河南省高校基本科研业务费 专项项目（NSFRF180402 ）

收稿日期:2020/01/07

修回日期:2020/03/20

出版日期:2021/07/15

Surrounding rock failure characteristics and strong anchorage control technology ofcoal roadway in deep mine

YU Chunsheng1, WEI Sijiang2,3, ZHANG Sheng2, WANG Meng2,3, SHEN Wenlong2,3

1.Guhanshan Coal Mine， Henan Coking Coal Energy Co. ， Ltd. ， Jiaozao  454000 ， Henan， China;2.School of Energy Science and Engineering， Henan Polytechnic University， Jiaozuo  454000 ， Henan， China;3.The Collaborative Innovation Center of Coal Safety Production of Henan Province， Jiaozuo  454000 ， Henan， China

Abstract:In Zhaogu No. 1 coal mine， the surrounding rock of the north wing return air roadway is seriously jointed. Influenced by mining abutment pressure， the occurrence of mining pressure is severe， which shows that the two walls of roadway convergence seriously， the floor heave is serious， and the roadway support system is invalid. Theu three stress fields“ distribution of original rock stress field， mining stress field and support stress field were put forward with numerical simulation， which was the basis of high strength support for this roadway. Based on control mechanism of surrounding rock in roadway of reconstructed bearing layer， the surrounding rock control scheme of“ anchor mesh cable + shotcreting + grouting + birdcage anchor cable + reinforcement anchor cable“ in north wing roadway was put forward. The deformation， plastic zone evolution， supporting stress and principle stress difference of surrounding rock under different supporting pressures were studied by numerical simulation. The results showed that with the increase of supporting pressure concentration coefficient， the reduction rate of roadway section increased gradually， and the surrounding rock mass decreased. The plastic zone changed from arch shape to butterfly shape， crab shape and tortoise shape； the anchor cable would gradually fail under the action of high bearing pressure， and the main stress difference will present multi peak phenomenon. Engineering practice showed that the proposed strong anchoring support technology could effectively control the deformation and failure of surrounding rock， which had better technical and economic rationality.

Key words:coal roadway;failure characteristic;reconstructed bearing layer;numerical simulation;strong anchorage

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