Characteristics of Stress Transfer and Progressive Fracture in Overlying Strata due to Mining-Induced Disturbances

doi:10.1155/2018/8967010

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Characteristics of Stress Transfer and Progressive Fracture in Overlying Strata due to Mining-Induced Disturbances
	Lv XF ; Zhou HY ; Wang AW ; Feng C(冯春); Xiao XC
刊名	ADVANCES IN CIVIL ENGINEERING
	2018-10-01
页码	Ar-8967010
ISSN号	1687-8086
DOI	10.1155/2018/8967010
英文摘要	In this study, based on the mining of the 13210 working face in the Yima coal mine of the Gengcun village, China, a simplified mechanical model for the analysis of dynamic destabilization of the overlying strata during underground mining was constructed. The numerical simulation was used to analyze the stress patterns in the advanced abutments of the tunnel face and the characteristics of dynamic failures in the overlying strata. Furthermore, similitude experiments were conducted to study the process of stress release and deformation in the overlying strata, and to analyze the effects of overburden destabilization on the ground surface settlement. The theoretical analysis indicated that if the geometric parameters of a working face are fully determined, a stiffness ratio no greater than 1 is required for dynamic destabilization to occur The numerical simulation results show that the stress in the overlying strata decreases with a decrease in distance from the tunnel face. The stresses in the advanced abutments initially increase with an increase in distance from the tunnel face, followed by a decrease in stress, and an eventual stabilization of the stress levels; this corresponds to the existence of a "stress build-up zone," "stress reduction zone," and "native rock stress zone." In similitude experiments, it was observed that a "pseudoplastic beam" state arises after the local stresses of the overlying strata have been completely released, and the "trapezoidal" fractures begin to form at stress concentrations. If the excavation of the working face continues to progress, the area of collapse expands upward, thereby increasing the areas of the fracture and densification zones. Owing to the nonuniform settlement of the overlying strata and the continuous development of bed-separating cracks, secondary fractures will be generated on both sides of the working face, which increase the severity of the ground surface settlement.
分类号	Q3
URL标识	查看原文
WOS关键词	FAULT SLIP ; PRESSURE ; SURFACE ; MODEL
WOS研究方向	Construction & Building Technology ; Engineering, Civil
语种	英语
WOS记录号	WOS:000441949200001
资助机构	Special Funds for Central Guiding Local Science and Technology Development [Z161100004516014] ; National Natural Science Foundation of China [51504029, 51774048] ; Beijing Nova Program [Z161100004916083]
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/78159]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	1.Inst Municipal Engn, Geotech Engn Res Ctr, Beijing 100037, Peoples R China 2.Liaoning Tech Univ, Inst Rock Burst, Sch Mech & Engn, Fuxing 123000, Liaoning, Peoples R China 3.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Lv XF,Zhou HY,Wang AW,et al. Characteristics of Stress Transfer and Progressive Fracture in Overlying Strata due to Mining-Induced Disturbances[J]. ADVANCES IN CIVIL ENGINEERING,2018:Ar-8967010.
APA	Lv XF,Zhou HY,Wang AW,冯春,&Xiao XC.(2018).Characteristics of Stress Transfer and Progressive Fracture in Overlying Strata due to Mining-Induced Disturbances.ADVANCES IN CIVIL ENGINEERING,Ar-8967010.
MLA	Lv XF,et al."Characteristics of Stress Transfer and Progressive Fracture in Overlying Strata due to Mining-Induced Disturbances".ADVANCES IN CIVIL ENGINEERING (2018):Ar-8967010.