Measurement and application of vibration signals during pressure relief hole construction using microseismic system

Zhang, Wenlong; Li, Chen; Ren, Jianju; Wu, Zheng

doi:10.1016/j.measurement.2020.107696

Cited by 21 publications

(13 citation statements)

References 36 publications

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“…In fact, the generation and transmission principle of vibration signal during the construction process of pressure relief drilling is mainly analyzed and demonstrated in our last study [38]. e vibration signals of the hydraulic drilling rig system are also collected and verified, which shows that the result is excellent.…”

Section: Introductionmentioning

confidence: 95%

Vibration Behavior during Underground Drilling Based on an Innovative Measurement Method and the Application

Cheng

Zhang

et al. 2021

Shock and Vibration

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Pressure relief drilling is one of the most common techniques to reduce the impact of rock burst, but the useful dynamic phenomena in the drilling process are ignored due to the lack of corresponding technical methods. Based on the fact, an innovative measurement method for vibration signals during the drilling construction by pneumatic drill rig is presented in this study. The acquisition and analysis of vibration signals show that the vibration information can reflect the drilling depth, the amplitude of different depth can reflect the pressure, and the vibration events of different depths can reflect the pressure relief effect. The method proposed in the study is of great significance to the supervision of the relief work quantity, the disclosure of the pressure situation, and the evaluation of the pressure relief effect.

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Section: Introductionmentioning

confidence: 95%

Vibration Behavior during Underground Drilling Based on an Innovative Measurement Method and the Application

Cheng

Zhang

et al. 2021

Shock and Vibration

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“…Rock burst is one of the most serious dynamic disasters in underground coal mines of China [1], which may be caused by certain dangerous stress [2,3], specific characteristics of mining coal [4,5], roof strata movement [6], or roadway layout [7,8], and seriously affects the normal operation of coal mine [9]. e key to solve the problem of rock burst lies in clear mechanism [10], effective monitoring [11,12], and control measures [13,14]. Rock burst accident can be divided into working face accident [15] and heading face accident [16,17] according to the different occurrence location.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Valuable Microseismic Events in Heading Face of an Underground Coal Mine Using Microseismic System

Zhang

Huo

et al. 2021

Shock and Vibration

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Rock burst monitoring of heading face is a weak aspect of rock burst monitoring in China; acoustic emission (AE) monitoring is one of the few monitoring technologies used in heading face, but its target signals are small energy events which are easy to be disturbed. Researchers usually focus on the weak AE events but ignore the microseismic (MS) events (different from AE event and caused by a larger scale of coal fracture), while this kind of events can also reflect the pressure situation of heading face and have higher energy value which may become a better indicator for rock burst monitoring of heading face. So, the basic characteristics of MS events in heading face are studied based on a running vibration signal acquisition system, including the occurrence position, main frequency range, maximum amplitude (MA) range, event duration, and relationship with geological structure. This paper provides a development basis of the monitoring method for rock burst monitoring of heading face by using MS events.

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“…Upon adopting deep-hole blasting, the panel excavation could be ensured, showing low-frequency instability (Ning et al, 2017). By investigating the characteristics of micro-seismic events and the movement patterns of THR, it was concluded that the key to controlling the strata behaviour lies in determining the failure mode, and the implementation of DPB could prevent the occurrence of impact accidents (Zhang et al, 2019(Zhang et al, , 2020. The variation in the support resistance was obtained for different layer combinations of key strata caving.…”

Section: Introductionmentioning

confidence: 99%

A case study of the periodic fracture control of a thick-hard roof based on deep-hole pre-splitting blasting

Chen

Wang

2021

Energy Exploration & Exploitation

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A thick-hard roof implies a large hanging-roof and high-frequency dynamic strata behaviour during mining, which may jeopardise personnel safety and equipment. To alleviate these hazards, deep-hole pre-splitting blasting is employed to control periodic fractures in thick-hard roof seams in Datong mining area. Based on loading and instability characteristics, a mechanical model of thick-hard roof periodic collapse is established to investigate the relationships and optimal parameters among the collapse interval, fracturing angle and support working resistance. LS-DYNA was employed to analyse the fracture evolution to determine the optimal charge parameters. The minimum weakening width and average fragmentation of the pre-split roof are obtained. Universal distinct element code simulations were used to determine the thick-hard roof collapse morphology and strata behaviour to confirm the optimal pre-splitting parameters. The deep-hole pre-splitting blasting on-site implementation reduces thick-hard roof collapse intervals, and the supports loading is verified to be safe with sufficient allowance, which show a good control effect on thick-hard roof seams.

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Measurement and application of vibration signals during pressure relief hole construction using microseismic system

Cited by 21 publications

References 36 publications

Vibration Behavior during Underground Drilling Based on an Innovative Measurement Method and the Application

Vibration Behavior during Underground Drilling Based on an Innovative Measurement Method and the Application

Characteristics of Valuable Microseismic Events in Heading Face of an Underground Coal Mine Using Microseismic System

A case study of the periodic fracture control of a thick-hard roof based on deep-hole pre-splitting blasting

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