Effective evaluation of deep-hole blasting for controlling strong tremors induced by deep coal mining-A case study

Wu, Kunbo; Zhang, Xiufeng; Zhu, Jianbo; Zhu, Zhen; Zheng, Fei; Xie, Heping; Zou, Junpeng

doi:10.1016/j.ijrmms.2022.105211

Cited by 37 publications

(8 citation statements)

References 26 publications

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“…By combining these two methods, more comprehensive damage information can be obtained for evaluation from micro to macro scales to understand better the interaction between microcracks in rocks and their propagation and connection mechanisms. Zou et al [68] evaluated the effectiveness of deep hole blasting technology in controlling strong earthquakes using AE and moment tensor methods. Zhou et al [69] analyzed the development of seepage channels in underground mining engineering using moment tensor inversion and acoustic emission monitoring.…”

Section: Discussionmentioning

confidence: 99%

Study on failure mechanism of tight sandstone based on moment tensor inversion

Dang

Yang

Zhu

2023

Heliyon

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Section: Discussionmentioning

confidence: 99%

Study on failure mechanism of tight sandstone based on moment tensor inversion

Dang

Yang

Zhu

2023

Heliyon

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“…PEL results indicate that as hydrostatic stress increases, intrinsic permeability becomes more insensitive to stress. When an external load is applied, coal and other rock will be compacted and deformed first; the original pores and fractures are partially closed under stress [23][24][25][26]. During this process, the ability of coal's internal skeletal structure to resist deformation is so weak that its intrinsic permeability decreases rapidly.…”

Section: Evolution Of Intrinsic Permeability and Deformationmentioning

confidence: 99%

The Anisotropy Permeability Evolution and Deformation Behavior of Raw Coal under Cyclic Loading Conditions

2023

Geofluids

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As an anisotropic porous media, coal’s intrinsic permeability is sensitive to stress variably in different directions. Likewise, the degree of damage sustained by the internal solid skeletal structure under external stresses is anisotropic. Four parameters are introduced: permeability stress-based loss rate (PEL) and permeability strain-based loss rate (PSL) highlight the stress sensitivity of the intrinsic permeability and deformation characteristics of coal’s internal structure during the loading process; stress-based irrecoverable permeability coefficient (EIP) and strain-based irrecoverable permeability coefficient (SIP) describe the loss of intrinsic permeability and irreversible deformation features in the whole load cycle. Stress sensitivity of the vertical intrinsic permeability is greater than that of the horizontal, and the ability of the vertical internal structure to resist deformation induced by an external load is weaker. During the cyclic loading process for the same coal sample, the stress sensitivity of the latter loading cycle is significantly less than the former.

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“…At present, the commonly used rock burst prevention technologies in most coal mines include largediameter boreholes, deep hole blasting, coal seam water injection, etc (Konicek et al 2011;Li et al 2016;Lin et al 2020;Liu et al 2022;Wei et al 2022;Zou et al 2022). However, the above technologies have certain disadvantages in field application.…”

Section: Introductionmentioning

confidence: 99%

Principle and application of high pressure hydraulic slotting pressure relief and energy release in deep roadway

Ning

Yang

et al. 2023

Preprint

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The essence of deep roadway dynamic disaster lies in the sudden release of surrounding rock elastic energy. High-pressure hydraulic slotting (HPHS) has become a new method for pressure relief and energy release of roadway surrounding rock. In view of the lack of qualitative description of the response relationship between parameters of HPHS and pressure relief and energy release degree of roadway surrounding rock. In this paper, theoretical analyses, numerical simulations, on-site industrial practice, and other methods are comprehensively used to carry out relevant research work. First, the structure model of pressure relief and energy release of coal by HPHS in the deep roadway was established, the principle of pressure relief and energy release by HPHS was revealed, and the principles and methods for determining the pressure relief parameters such as the range of slot, the spacing of the slot hole, and the spacing of slot were proposed. Three evaluation indexes of pressure relief and energy release effect of coal after HPHS were proposed, namely, stress ratio of coal, elastic energy density ratio of coal, and displacement rate of the roadway rib. According to the evaluation indexes, the degree of pressure relief and energy release was divided into three levels: reverse pressurization, full pressure relief, and transitional pressure relief. Then, the FLAC3D numerical model was constructed, the level of pressure relief and energy release under different HPHS parameters was analyzed, and the optimal slotting parameters were determined. Finally, the on-site industrial practice was carried out in the 7312 working face of Xinhe Coal Mine. The effect test shows that the effect of pressure relief and energy release was remarkable after HPHS was adopted on the roadway surrounding rock, which can effectively reduce the risk of rock bursts. The research results can further improve HPHS technology systems, and provide a theoretical basis and technical reference for the stability control of deep roadway surrounding rock.

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Effective evaluation of deep-hole blasting for controlling strong tremors induced by deep coal mining-A case study

Cited by 37 publications

References 26 publications

Study on failure mechanism of tight sandstone based on moment tensor inversion

Study on failure mechanism of tight sandstone based on moment tensor inversion

The Anisotropy Permeability Evolution and Deformation Behavior of Raw Coal under Cyclic Loading Conditions

Principle and application of high pressure hydraulic slotting pressure relief and energy release in deep roadway

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