A study of surface subsidence and coal pillar safety for strip mining in a deep mine

Sun, Wei; Zhang, Qi; Luan, Yuanzhong; Zhang, Xiaoping

doi:10.1007/s12665-018-7810-y

Cited by 26 publications

(13 citation statements)

References 28 publications

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“…Parameter values during accidents can be initially determined on the basis of the abovementioned results: T=RMB 16 million; L=RMB 15 million; h=0.4; P=RMB 300,000; W = RMB 100,000; N=RMB 150 million; C=RMB 150,000 million; and B=RMB 10 million. At the time, = ( − )/ =0.5> 0, = ( − ℎ )/ < 0, and when 0 < < 1, < 0, the system converges to (1,0) in accordance with the abovementioned analysis (i.e., on-post and no inspection). The inspection revenue matrix of the coal mine enterprise can be obtained in accordance with the parameters presented in Table 4:…”

Section: Case Analysissupporting

confidence: 74%

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Game Research on Coal Mine Workers’ Off‐Post Behaviors

Zeng

Yao

Wang

et al. 2019

Mathematical Problems in Engineering

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In order to seek for causes and solutions of off-post behaviors of coal miners, static and evolutionary games were utilized on the basis of an established strategy simulation model between coal mine enterprise and coal miners. These games were used to determine the revenue matrix of two game parties given off-post behaviors of coal miners from two levels (coal miners and coal mine enterprise). Thus, equilibrium and dynamic evolutionary analyses of the two parties should be conducted. Results indicated that, in the enterprise’s perspective, inspection cost and punishment intensity are important factors that influence the safety production and economic benefit of coal mine enterprises; in the coal miners’ perspective, wage loss and the constraint degree it generates are essential factors. Furthermore, these factors constitute a key to solving off-post behaviors of coal miners. Reasonability of the established simulation model was analyzed and verified on the basis of off-post behaviors of workers from a coal mine that belongs to Yanzhou Coal Mining Co., Ltd. The coal mine enterprise should enhance the inspection of safety production and establish scientific and complete off-post punishment mechanism. Moreover, the coal mine enterprise should provide proper compensation, treatment, and reward policies of workers to reduce the off-post behaviors of workers from a coal mine enterprise effectively.

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Section: Case Analysissupporting

confidence: 74%

“…Safe production and occupational health have constantly been the focus of attention in industrial development, especially in the coal industry with a high rate of accidents [1,2]. Coal miners are faced with more dangerous and more severe working environment than workers from other industries.…”

Section: Introductionmentioning

confidence: 99%

Game Research on Coal Mine Workers’ Off‐Post Behaviors

Zeng

Yao

Wang

et al. 2019

Mathematical Problems in Engineering

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“…Suppose that the fracture length of rock B is equal to the length of fractured rock A, and then ∆S = h/6 = 0.832 m. By calculation the following can be obtained: I = 10.4 m 3 , r = 0.044/m 2 , N = 20.049 MN, Q = 25.325 MN, S = 1.967 × 10 −4 m 2 , α = 0.1481 m, β = 0.06457/m, M 0 = 16.69 MN. In terms of cushion coefficient k, the cushion coefficient of Baodian mine (k = 200 MPa) is used in this study in that the burial depth of the two mines is similar [17]. Through calculation and origin data processing, M max -x curve is obtained, as is shown in Figure 2, where x denotes the distance between the starting point of clamping and maximum bending moment.…”

Section: Main Roof Fracture Line Locationmentioning

confidence: 99%

“…Yao et al [16] studied the influence of burial depth, mining height, and advance speed of coal seam on coal pillar stability by means of Universal Distinct Element Code numerical software and put forward control measures specific to seam stability in Longhu mine. Sun et al [17] studied the stress distribution of coal pillars with different width through theoretical analysis and FLAC 3D numerical simulation and obtained the interrelation between pillar width and mining width in the working face. Zhou et al [3,18] explored the characteristics of stress, displacement, and fracture development in a coal pillar roof by physical experiments.…”

Section: Introductionmentioning

confidence: 99%

Study on Efficient Utilization Technology of Coal Pillar Based on Gob-Side Entry Driving in a Coal Mine with Great Depth and High Production

Zhang

Xie

et al. 2019

Sustainability

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Improving the utilization of non-renewable resources takes a crucial position in circular economy. Gob-side entry driving technology has been widely applied in coal mines in China, such as in the Shilawusu mine (Ordos City, Inner Mongolia), here considered as a case study due to its high safety and resource-recovery rate. However, at present the complexity of coal pillar utilization makes it hard to fully master the key technology for coal pillar size design, which leads to huge waste of coal resources. Based on theoretical calculation and numerical simulation, this study analyzed the basic mechanical structure of coal pillar and the characteristics of its weakening failure, providing theoretical reference for efficient recovery of coal resources. In general, results of this study can be helpful in pursuing the efficient, hence sustainable, development of mines with Gob-side entry driving technology.

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“…The deformation of coal and rock pillars during excavation could be determined by on-site monitoring, and better monitoring results were obtained by using a 3D laser scanner [29]. To effectively reduce the shock disturbance on coal and rock pillars due to the dynamic pressure of mining, the stability of coal pillars in a bilateral goaf was analyzed by theoretical analyses and numerical simulations, and the stress distribution characteristics of section coal pillars were obtained [30]. Previous researches have also studied the microcrack development, structural damage, and energy transformation of coal and rock mass to the failure rules of coal and rock mass and revealed the mechanism of coal and rock dynamic disasters [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Physical Characteristics of Section Coal and Rock Pillars Under Roof Shock Disturbances From Goaf

Shen

2020

Front. Phys.

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The stability of a rock strata structure is closely related to its response physical characteristics under external shock disturbance. The roof shock disturbance from goaf is usually one of the important factors that cause coal and rock pillar instability. It is necessary to study the dynamic physical characteristics of coal and rock pillars under roof shock disturbance from goaf. The dynamic structural system model of elastic-plastic finite element was established for the formation of surrounding rock and coal pillars in a deep stope. The response physical characteristics of coal pillars with different widths were analyzed under the roof shock disturbance intensity and frequency from goaf. The natural vibration characteristics of the stope model were calculated and the first 10-order natural frequencies were extracted. The calculations indicated that the vertical displacement and the plastic zone occupation ratio of the coal pillar increased with the increase of the shock disturbance intensity, decreased with the increase of the shock disturbance frequency, and decreased with the increase of the coal pillar width. The influence of the vertical deformation and the plastic zone occupation ratio of the coal pillar under shock disturbance frequency was more obvious compared with that of the shock disturbance intensity, especially at low frequency. The closer the shock disturbance frequency was to the natural frequency of the model, the larger the plastic zone of the coal pillars was, with the bearing capacity of the coal pillar decreasing significantly. It is significant that more attention should be paid to monitoring the frequency of roof shock disturbance signal when designing coal pillars width in the coal mine.

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A study of surface subsidence and coal pillar safety for strip mining in a deep mine

Cited by 26 publications

References 28 publications

Game Research on Coal Mine Workers’ Off‐Post Behaviors

Game Research on Coal Mine Workers’ Off‐Post Behaviors

Study on Efficient Utilization Technology of Coal Pillar Based on Gob-Side Entry Driving in a Coal Mine with Great Depth and High Production

Physical Characteristics of Section Coal and Rock Pillars Under Roof Shock Disturbances From Goaf

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