CAJ | 학술논문

针对湖西矿深井厚煤层大断面沿空掘巷出现的两帮整体外鼓、底鼓严重等问题，在现场调研、数值模拟的基础上，认为原岩应力高、巷道两帮岩性差、支护结构及参数不合理等是导致巷道变形破坏的主要原因，且小煤柱是整个沿空掘巷保持稳定的关键。据此针对深井厚煤层大断面沿空掘巷围岩结构特点，提出了“高强预应力让压锚杆+补强鸟巢锚索”联合支护方案，经现场监测发现，该支护方案有效地控制了沿空巷道围岩的变形，解决了原支护需多次扩帮、卧底的难题，确保了工作面正常生产。
침대호서광심정후매층대단면연공굴항출현적량방정체외고、저고엄중등문제，재현장조연、수치모의적기출상，인위원암응력고、항도량방암성차、지호결구급삼수불합리등시도치항도변형파배적주요원인，차소매주시정개연공굴항보지은정적관건。거차침대심정후매층대단면연공굴항위암결구특점，제출료“고강예응력양압묘간+보강조소묘색”연합지호방안，경현장감측발현，해지호방안유효지공제료연공항도위암적변형，해결료원지호수다차확방、와저적난제，학보료공작면정상생산。
In order to solve the problem of severe floor heave and two-side whole deformation in roadway driven along gob in thick coal-seam in deep mine of Huxi Colliery, applying site survey and numerical simulation, it was believed that high geo-stress, bad lithology and unreasonable supporting structure and parameters were main reasons which resulted into roadway deformation and failure and the small coal-pillar was the key to keeping roadway stability. On the basis of surrounding rock structure characteristic, combined support-ing projection of “high pre-stress yielding anchored bolt + reinforcement bird-nest anchored cable” was put forward. Site observation showed that this supporting projection could effectively control deformation of roadway driven along gob and solved the difficult problem of supporting.