CAJ | 학술논문

为解决深井高应力软岩巷道出现的围岩大变形和支护问题,以邢东矿-980大巷为例,采用现场调研、数值模拟、井下试验等方法,分析围岩大变形等级和变形破坏机理.研究认为其破坏的主要因素有围岩裂隙发育且敏感性强、高地应力、复杂地质构造、水理作用,确定其属于应力扩容膨胀型(HJS)复合地质软岩.巷道变形破坏动态过程为:围岩裂隙发育、强度低(高应力扰动作用下)→形成大范围破碎带→水理、复杂地质构造及流变特性→大变形失稳.基于上述研究,提出以高强锚网索、可缩性环形支架、注浆加固为核心的多层次耦合支护系统,分析具体支护形式与围岩的耦合作用机理,并进行支护参数设计.工程实践表明:-980大巷扩修60 d后围岩变形速率降至1 mm/d,顶板最大收敛值193 mm,两帮最大收敛值114 mm,底板最大收敛值151 mm,实现了深井软岩巷道稳定性控制.
위해결심정고응력연암항도출현적위암대변형화지호문제,이형동광-980대항위례,채용현장조연、수치모의、정하시험등방법,분석위암대변형등급화변형파배궤리.연구인위기파배적주요인소유위암렬극발육차민감성강、고지응력、복잡지질구조、수리작용,학정기속우응력확용팽창형(HJS)복합지질연암.항도변형파배동태과정위:위암렬극발육、강도저(고응력우동작용하)→형성대범위파쇄대→수리、복잡지질구조급류변특성→대변형실은.기우상술연구,제출이고강묘망색、가축성배형지가、주장가고위핵심적다층차우합지호계통,분석구체지호형식여위암적우합작용궤리,병진행지호삼수설계.공정실천표명:-980대항확수60 d후위암변형속솔강지1 mm/d,정판최대수렴치193 mm,량방최대수렴치114 mm,저판최대수렴치151 mm,실현료심정연암항도은정성공제.
In order to solve the problems of large deformation and support of high stress deep soft roadway, taking Xingdong ore-980 as an example, combined with field study, numerical calculation and field test, etc, the degree of the large deformation and deformation failure mechanism of surrounding rock have been analyzed. The causes of its failure have been summarized as follows: fracture develop-ment and strong sensitivity, high crustal stress, complex geological conditions and hydro-physical prop-erty, according to which, the research has indicated that ore-980 roadway is the stress dilatancy expan-sion type composite geological soft rock. The main reasons for the instability of ore-980 roadway have been found to be the development of surrounding rock fracture and the lower strength (under the high stress disturbance) leading to a wide range of breakage, together with the hydro-physical property, com-plex geological structures and rheological characteristics, resulting in the large deformation. Based on the above research,the multiple dimensions coupling support which is centered with high strength an-chor, yieldable ring support and grouting reinforcement has been proposed, and surrounding rock cou-pling support mechanism and specific support form have been analyzed, and the design of parameters of concrete support has been done. Field practice has shown that after 60 d of expansion of ore-980 road-way, the convergence rate of surrounding drops 1 mm/d with roof subsidence reaching 193 mm, road-way's side deformation reaching 114 mm, floor heave reaching 151 mm,which has achieved the goal of effective control of deep roadway with soft surrounding rock.