Prediction of Relatively High-Energy Seismic Events Using Spatial–Temporal Parametrisation of Mining-Induced Seismicity

Si, Guangyao; Cai, Wu; Wang, Shuyu; Li, Xu

doi:10.1007/s00603-020-02210-3

Cited by 66 publications

(17 citation statements)

References 37 publications

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“…e spatial distribution of MS events was affected by the working face's stress distribution, geological structures, and roof activity [32,33]. As shown in Figure 11, high energy MS events (≥10 3 J) in LW3102 from January 4 to April 8 occurred over three areas: Area 1 (advanced region of the working face), Area 2 (wide coal pillar ahead of the working face), and Area 3 (wide coal pillar area in goaf ), which were all within the influence range of abutment pressure of goaf, and the stress of coal was high.…”

Section: Spatial Distribution and Evolution Of Ms Eventsmentioning

confidence: 99%

Mechanism and Evolution Control of Wide Coal Pillar Bursts in Multithick Key Strata

Guo

Cao

Xue

et al. 2021

Shock and Vibration

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Coal mine pillar burst frequently occurs in Western China, which seriously restricts safe production. This paper takes the 35 m coal pillar of the 3102 working face of MKQ coal mine as the engineering background. The mechanism and evolution control of pillar bursts in multithick key strata are studied using field investigation, theoretical analysis, and numerical simulation. The mechanism of dynamic and static stress-induced pillar bursts was revealed combining the “O-X” broken features for key strata and numerical simulation of pillar stress evolution. A prevention scheme is put forward for strata presplit blasting and adjusting coal pillar width to minimize the dynamic and static stresses. The results demonstrate the following. (1) In the multithick strata, the first and second near-field subkey strata have perpendicular “O-X” broken features, whereas the third far-field subkey has parallel “O-X” broken features. The working face has three kinds of periodic weighting phenomena: long, medium, and short. (2) The simulated vertical stress curve of 35 m coal pillar goes through three states: two-peak, asymmetric trapezoidal and symmetrical trapezoidal shape with the different advancing position of working face. The stress concentration is extensively promoting a high-risk area for rock burst. (3) The coal pillar burst was induced by the superposition of energy released by the key strata breaking and the elastic energy accumulated in the wide coal pillar. (4) The monitoring data showed that the long, medium, and short periodic weighting steps of multithick key strata are 141.6 m, 43.2–49.6 m, and 17.6–27.2 m, respectively. The microseismic events energy, frequency, and stress of hydraulic support increment are the highest during the long periodic weighting, and the spatial distribution of microseismic events coincides with the stress concentration area. The theoretical analysis is confirmed with the field practice.

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Section: Spatial Distribution and Evolution Of Ms Eventsmentioning

confidence: 99%

Mechanism and Evolution Control of Wide Coal Pillar Bursts in Multithick Key Strata

Guo

Cao

Xue

et al. 2021

Shock and Vibration

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“…In a rockburst, the fragmented rock blocks are rapidly ejected into excavations. Rockburst has been regarded as a major challenge in especially deep underground excavations for decades (Ortlepp 2005;Kaiser and Cai 2012;Jiang et al 2014;Suorineni et al 2014;Iannacchione and Tadolini 2016;Mark 2016;Zhang et al 2017;Zhou et al 2018;Si and Belle 2019;Si et al 2020;Song et al 2020Song et al , 2021Wei et al 2020Wei et al , 2021Cai et al 2021;Dai et al 2021), because it is extremely difficult to predict and control. A rockburst is commonly termed a coal burst in underground coal mining and specifically refers to coal as the type of ejected material.…”

Section: Introductionmentioning

confidence: 99%

A review of investigations on ground support requirements in coal burst-prone mines

Wei

Zhang

Canbulat

et al. 2022

Int J Coal Sci Technol

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Ground support is widely implemented to mitigate dynamic rock failures in underground mines. This paper investigated the ground support requirements in burst-prone mines to mitigate the catastrophic dynamic rock failures of rock and/or coal bursts. First, the ground support principles and considerations in burst-prone conditions are identified. The objective of a ground support system is to increase the capacity to accommodate rock fracturing in a rockburst and, in turn, to minimize the kinetic energy of the ejected material. The support capacities of various yielding rockbolts and integrated support systems are then investigated using the test results in the laboratory. Apart from the energy absorption and yielding deformation capacity, the initial stiffness and energy absorption rate are also critical factors when applying yielding rockbolts in practice. Adding rope lacing and mesh strap to surface support elements can substantially enhance the support performance of the system. In practice, semi-analytical and empirical approaches are often used to determine the ground support elements in burst-prone areas. Semi-analytical methods first evaluate the support demand in burst risk zones and then select support elements according to their laboratory test results. Alternatively, empirical methods determine the ground support elements according to the locally established empirical rating scheme, which usually ranks the support capacities of various support systems based on ground support conditions and damage conditions. The outcomes of this study can provide insights into ground support strategies and assist the mining industry to develop effective coal burst control technologies.

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“…e effectiveness of prediction and prevention of rock burst needs to be improved. So far it has not formed a complete system of rock burst measurement, prediction, and treatment [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Stress Relief and Support for Stability of Deep Mining Roadway with Thick Top Coal in Hujiahe Coal Mine with the Risk of Rock Burst

Liu

Qian

Yang

et al. 2021

Shock and Vibration

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Rock burst is a typical dynamic disaster in deep underground coal mining. Based on the support problems of the deep roadways in fully mechanized caving face 401111 of Hujiahe Coal Mine suffering from rock burst in Shaanxi Province of China, the failure law and influencing factors of the surrounding rock of the roadway are analyzed. The results show that the deformation of surrounding rock in the roadway shows the characteristics of elastic, plastic transformation, rheology, and expansion. At the same time, it has the typical characteristics of deep roadway, such as the fast deformation speed, long duration, asymmetric deformation, and large loose broken area of surrounding rock. Based on the principle of “strengthening support in shallow zones” and “deep pressure relief in deep zones” in the surrounding rock, the control scheme of surrounding rock in the return roadway of fully mechanized caving working face 401111 is proposed by taking the large diameter pressure relief and deep hole blasting as the main means of pressure relief. The practice shows that the surrounding rock of the return roadway is relatively stable after the implementation of the new scheme, which shows that the design of the new support scheme is reasonable and reliable. It is of great significance for the stability control of surrounding rock of the mining roadway suffering from rock burst.

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Prediction of Relatively High-Energy Seismic Events Using Spatial–Temporal Parametrisation of Mining-Induced Seismicity

Cited by 66 publications

References 37 publications

Mechanism and Evolution Control of Wide Coal Pillar Bursts in Multithick Key Strata

Mechanism and Evolution Control of Wide Coal Pillar Bursts in Multithick Key Strata

A review of investigations on ground support requirements in coal burst-prone mines

Stress Relief and Support for Stability of Deep Mining Roadway with Thick Top Coal in Hujiahe Coal Mine with the Risk of Rock Burst

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