Predicting the height of the water-conducting fractured zone using multiple regression analysis and GIS

Liu, Yong; Yuan, Shichong; Yang, Binbin; Liu, Jiawei; Ye, Zhaoyong

doi:10.1007/s12665-019-8429-3

Cited by 32 publications

(12 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the number of variables involved, it can be divided into univariate regression analysis and multiple regression analysis. Because there are many factors affecting the development of WFFZ, this paper uses multiple regression analysis to establish a prediction model (Liu et al 2019;. The multiple regression models of WFFZ and multi-factor influencing factors are as shown in Eq.…”

Section: Fig10 Sectional View Of 1# Boreholementioning

confidence: 99%

A Case Study on Development of Water-flow Fractured Zone During Close-Distance Repeated Coal Mining

Luan

Shi

Shui

et al. 2021

Preprint

View full text Add to dashboard Cite

The upper and lower seam of seam No.3 of some coal mines in Shandong Province are in close proximity which can be regards as close-distance coal seam mining.This paper takes the close-distance working face of Fucun coal mine as engineering background and mainly focuses on the investigation and research on inaccuracy of the forecasting and incompetence of the developing principles of water-flow fractured zone(WFFZ)during close-distance coal seam group mining.First,calculations on the height of WEEZ by adopting empirical formula.And FLAC3D software was established to calculate the height of the overburden WFFZ after repeated mining of the upper and lower seam of seam No.3.At the same time,using the double-ended water plugging observation technology of downhole drilling and upward hole drilling by analyzing the water injection loss ratio of the reference hole and the post-mining hole,the accurate numerical values of the WFFZ and the ratio of WFFZ height to mining height(W-M ratio)are obtained.The comparative analysis shows that the numerical simulation results are close to the measured ones,and the empirical formula is not applicable to the near-distance repeated mining.Finally,the prediction model is established based on the measured height of the WFFZ of multiple working faces,which provides a scientific basis for further exploring the development law of the overlying rock in underwater coal mining and ensuring the safe mining of coal seams at close distances.

show abstract

Section: Fig10 Sectional View Of 1# Boreholementioning

confidence: 99%

A Case Study on Development of Water-flow Fractured Zone During Close-Distance Repeated Coal Mining

Luan

Shi

Shui

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Figure 2 displays the study area. that MIF in overlying strata are saddle shaped [30,31]. In addition, scholars have laid a theoretical foundation for backfilling water conservation mining by studying the law of MIF under longwall backfilling and drift backfilling conditions [32,33].…”

Section: Profile Of the Study Areamentioning

confidence: 99%

“…At the same time, the caving zone and fissure zone were defined as MIF connected area of roof water. Chinese scholars have detected MIF distribution patterns of hundreds of longwall working faces under different geological conditions, and concluded that MIF in overlying strata are saddle shaped [30,31]. In addition, scholars have laid a theoretical foundation for backfilling water conservation mining by studying the law of MIF under longwall backfilling and drift backfilling conditions [32,33].…”

Section: Introductionmentioning

confidence: 99%

Characteristics and Control of Mining Induced Fractures above Longwall Mines Using Backfilling

Wang

2019

Energies

View full text Add to dashboard Cite

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.

show abstract

“…1). Fractures in the overburden strata are affected by the mining disturbance and extend upward to the aquifers, forming water-flowing fractured zones that provide transfer channels for groundwater (Liu et al 2019b;Miao et al 2011). Traditional water conservation mining methods involve controlling the developmental height of the fractured zones below the aquifers, and include strip mining, backfill mining, room and pillar mining, and restricted height mining (Chang et al 2014;Fan et al 2019;Huang 2017;Zhu et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Coal Sample Damage in Acidic Water Environments

et al. 2021

View full text Add to dashboard Cite

We investigated the effects of acidic and circumneutral water on coal samples by uniaxial compression, acoustic emission, and a series of physical tests. In acidic water, the coal samples were damaged, and their ultrasonic velocities decreased, as minerals such as kaolinite and calcite underwent dissolution. When the pH was < 7, the uniaxial compressive strength and elastic modulus decreased, while the duration of the residual strength stage tended to increase. The reactions were stronger at higher H+ concentrations and the number of large pores increased; there was a significant increase in the accumulated acoustic emission counts and maximum average energy near the unstable crack growth stage. The post-peak stage of the coal samples was characterized in the different acidic waters and the failure modes were identified by spectrum analysis. Acidic water damaged the weak areas of coal samples by complex physical and chemical reactions, which made direct tensile failure more likely when the coal samples were loaded.

show abstract

Predicting the height of the water-conducting fractured zone using multiple regression analysis and GIS

Cited by 32 publications

References 27 publications

A Case Study on Development of Water-flow Fractured Zone During Close-Distance Repeated Coal Mining

A Case Study on Development of Water-flow Fractured Zone During Close-Distance Repeated Coal Mining

Characteristics and Control of Mining Induced Fractures above Longwall Mines Using Backfilling

Experimental Study of Coal Sample Damage in Acidic Water Environments

Contact Info

Product

Resources

About