干旱区生态环境知识资源中心(Arid): Characteristics and Control of Mining Induced Fractures above Longwall Mines Using Backfilling

Arid

DOI	10.3390/en12234604
	Characteristics and Control of Mining Induced Fractures above Longwall Mines Using Backfilling
	Wang, Shuokang 1; Ma, Liqiang 1,2
通讯作者	Ma, Liqiang
来源期刊	ENERGIES
EISSN	1996-1073
出版年	2019
卷号	12 期号:23
英文摘要	Water conservation in mining is the key to solving the conflict between coal resource exploitation and ecological environment protection, especially in arid and semi-arid mining areas. Continuous excavation and continuous backfilling (CECB) in longwall mining is an important method to realize water conservation mining. Considering the different boundary conditions of the main roof stress in different mining phases, the mechanical models of clamped-clamped beam, continuous beam, and elastic foundation beam among filling body, main roof, and strata are established. Furthermore, the spatio-temporal evolution mechanisms of mining-induced fractures (MIF) are studied. It is found that there is a hyperbolic function relationship between MIF and the mining roadway (MR) filling percentages. Based on mining the XV coal seam under CECB in the Wangtaipu Coal Mine, the distribution patterns of MIF are studied. It is concluded that the distribution pattern is an isosceles trapezoid with the moving angle of overlying strata as the bottom angle, and the upper and lower boundary of MIF as the two parallel sides. Based on the influence coefficient of MR filling percentages on MIF, the curve of the MIF height is divided into three ranges, which include the stability control range, the critical range, and the lost control range. The controlling effects of MR filling percentages are studied, and the calculation expression of the MIF height in the stability control range is given. In engineering practice, 90% MR filling percentage is used for CECB. The MIF height is about 3.0 times of mining height, and the main roof beam is not broken. The water-resisting property of aquiclude III is not destroyed, thus, the mining does not adversely impact the water. The results provide theories and practices for controlling MIF under CECB in the conditions of extremely close distance aquifers.
英文关键词	water conservation mining continuous excavation and continuous backfilling (CECB) mining induced fractures (MIF) mining roadway (MR) filling percentages
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000508355500029
WOS关键词	GROUNDWATER ; OVERBURDEN ; SIMULATION ; HEIGHT
WOS类目	Energy & Fuels
WOS研究方向	Energy & Fuels
EI主题词	2019-12-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311235
作者单位	1.China Univ Min & Technol, Minist Educ China, Key Lab Deep Coal Resource Min, Xuzhou 221116, Jiangsu, Peoples R China; 2.Xian Univ Sci & Technol, Sch Energy, Xian 710054, Peoples R China
推荐引用方式 GB/T 7714	Wang, Shuokang,Ma, Liqiang. Characteristics and Control of Mining Induced Fractures above Longwall Mines Using Backfilling[J],2019,12(23).
APA	Wang, Shuokang,&Ma, Liqiang.(2019).Characteristics and Control of Mining Induced Fractures above Longwall Mines Using Backfilling.ENERGIES,12(23).
MLA	Wang, Shuokang,et al."Characteristics and Control of Mining Induced Fractures above Longwall Mines Using Backfilling".ENERGIES 12.23(2019).