Water Inrush Modes Through a Thick Aquifuge Floor in a Deep Coal Mine and Appropriate Control Technology: A Case Study from Hebei, China

Li, Chunyuan; Zuo, Jianping; Huang, Xuanhao; Wu, Genshui; Li, Yubao; Xing, Shikun

doi:10.1007/s10230-022-00891-6

Cited by 6 publications

(1 citation statement)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fan, Kaifang et al [15], Yang, Zhongping et al [16] describe the evolution process of rock separation and instability from the aspects of dynamic evolution and spatiotemporal evolution, respectively. Li et al [17] analyzed the underground pressure behavior during mining and verified the effectiveness of floor grouting reinforcement control technology through microseismic monitoring.…”

Section: Introductionmentioning

confidence: 99%

Damage Depth Test and Numerical Simulation of Stope Floor in Mining Face

Cui,

Shao,

Zhao

2023

Geofluids

View full text Add to dashboard Cite

The purpose of this study is to explore the development depth of rock layer rupture and analyze the developmental regularity of mining floor in Dongsi mining area of Xinzhi Coal Mine. Two kinds of pressure water testing methods and numerical simulation are used to study the failure characteristics of the bottom plate of the working face in Dongsi mining area of Xinxian Coal Mine. The results show that the failure of working face bottom plate starts from a certain range in front of the working face. With the advance of working face, the failure depth of mining bottom plate increases continuously. At the same time, the failure range of mining roadway is slightly larger than the failure range of working face bottom plate due to the double disturbance of tunneling and mining. The pressure water test shows that the rupture depth occurs at 8.98-9.03 m. The numerical simulation results of floor failure depth show that its depth is about 8.7 m, which is basically consistent with the pressure water test. It provides a reference for the advanced preexploration of mining bottom plate failure in similar coal seam.

show abstract

Section: Introductionmentioning

confidence: 99%

Damage Depth Test and Numerical Simulation of Stope Floor in Mining Face

Cui,

Shao,

Zhao

2023

Geofluids

View full text Add to dashboard Cite

show abstract

The Two Zones of Floor Failure and its Control via a ‘Dual Key Layer’ Approach

Miao,

Xu,

Guo

et al. 2024

Mine Water Environ

View full text Add to dashboard Cite

In Jiaozuo mining area of North China coal field, there are multiple strong water-richness aquifers close to the coal seam. In order to prevent floor water inrush accident, it is need to be reinforced by floor grouting before mining. According to the changes of the mechanics and hydrogeological properties of the floor key rock strata after floor grouting, the coal seam floor is divided into 'two zones' of 'water conduction fracture zone' and 'mechanical strength damage zone'. The composite water control model of 'floor structure stability water control key layer' and 'floor damage infiltration water control key layer' is established after grouting reinforcement of upper hard rock aquifer. Microseismic(MS) technology is used to analyse the characteristics of 'two zones' and the water control capability of 'dual key layers' in fault regions and no-fault regions respectively of experimental working face. It is revealed that the L8 limestone plays the role of mechanical barrier key layer after grouting. The change of elastic modulus of rock mass before and after grouting is measured by borehole ultrasonic method, which result shows that the elastic modulus of different rock mass increases by 40% to 852% respectively after grouting. By using the formula method, FLAC3D numerical simulation and field measurement, it is found that the failure depth of the floor after grouting is reduced by 51% compared with that without grouting. Seven influencing factors for floor water control 'dual key layer' are proposed, which are quantified by AHP (Analytic Hierarchy Process) method. A scheme of 'dual key layer' water control capability evaluation is formed by AHP method and influencing factors evaluation method. It is revealed that fault activation and fault with water-filling are the main factors that affect the failure of water control capability of 'dual key layer' and floor water inrush. The results of the research are consistent with the water inrush of the experimental working face, which will contribute to the early warning, prevention and evaluation of floor water inrush in mines with the same hydrogeological conditions.

show abstract