Rock burst assessment and prediction by dynamic and static stress analysis based on micro-seismic monitoring

He, Junguo; Li, Dou; Gong, Siyuan; Li, Jing; Ma, Zhiqiang

doi:10.1016/j.ijrmms.2017.01.005

Cited by 152 publications

(50 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this regard, rockbursts are likely to occur when the rock mass is firstly under the high static stress induced by the geo-stress and excavation and is secondly triggered by a dynamic disturbance. A sudden failure of a loaded structural unit of rock mass will induce a tremor which provokes seismic waves propagating through rock mass, providing additional stress (dynamic stress) in the surroundings of roadways [21,23]. Numerous and low-energy tremors often occur before strong tremors.…”

Section: Dynamic Disturbancementioning

confidence: 99%

A Novel Experimental Technique to Simulate Shock Behaviour and Bursting Failure of Roadways

Wang

Gong

et al. 2019

Shock and Vibration

View full text Add to dashboard Cite

Rockburst is a sudden and dynamic failure of rock that can cause serious injury to miners and damage to the underground excavations. Stress path, dynamic disturbance, and support system play important and different roles in the generation processes of rockbursts, resulting rockbursts with variety of reasons and failure modes. A test facility that was capable of simulating such factors was developed to study shock behaviour and bursting failure of roadways. e results demonstrate that the modeled roadway was in good condition and retained a shock resistance capacity after three drop loads. Until the acceleration amplitude increased to a certain level at the time of the fourth dynamic loading, sudden bursting failure of modeled roadway occurred. Many large fragments ejected from the upper and middle regions of the roadway, accompanied with loud noise. A deep pit was observed after the bursting failure. e axial of the fan-shaped pit had an angle above the vertical. In addition, shock behaviour of the modeled roadway had been changed by the anchor-net support. Significant differences appeared between the acceleration signals measured in two roadway sections with and without the anchor-net support. e acceleration magnitude of the supported roadway section was strongly reduced by the presence of the anchor-net support. Even when the unsupported roadway section underwent a sudden injection failure, the roadway with anchor-net support was in good condition. is study may eventually lead to a methodology for studying the rockbursting resistance capacity of underground roadways.

show abstract

Section: Dynamic Disturbancementioning

confidence: 99%

A Novel Experimental Technique to Simulate Shock Behaviour and Bursting Failure of Roadways

Wang

Gong

et al. 2019

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…The mechanical properties of coal and rock are of key importance in coal mining and exploration [1][2][3], rock strata control [4][5][6], hydraulic fracturing [7][8][9], rock burst [10,11], (enhanced) coal bed methane recovery (CBM/ECBM) [12], water hazard control [13,14], geo-sequestration [15,16], and underground coal gasification in coal mines and deep unmineable coal seams [17].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Heterogeneous Properties of Coal and Rock Quantified and Mapped at the Microscale

Sun

Zhang

et al. 2020

Applied Sciences

View full text Add to dashboard Cite

Due to the impossibility of obtaining intact standard experimental samples, it is difficult to test the mechanical properties of soft and broken coal and rock obtained from deep coal mines. So, an advanced experimental technology based on a small sample volume, nanoindentation technology, was introduced and used to measure the mechanical parameters of them. By using the averaging method, the hardness of shale, mudstone and coal are 1191.90 MPa, 674.95 MPa and 424.30 MPa, respectively; their elastic moduli are 20.39 GPa, 11.72 GPa and 5.47 GPa; and their fracture toughness were 1.66 MPa·m0.5, 1.28 MPa·m0.5 and 0.77 MPa·m0.5. These three mechanical parameters were used to quantify and map the heterogeneous properties of coal and rock for convenience and accuracy. For example, the inter quartile range (IQR) of the hardness of shale, mudstone, and coal are 1502.10 MPa, 1016.20 MPa and 54.64 MPa, respectively, meaning that coal has the best homogeneity among them. Nanoindentation technology provides researchers with a convenient method to conduct mechanical experiments at the microscale.

show abstract

“…17 Many researches have been conducted on MS monitoring in coal mines for several years, and a number of practical applications with a self-developed MS monitoring system have been performed. [18][19][20][21] These researches have laid the foundation for the application of MS monitoring in coal mines. 22,23 Meanwhile, MS has been studied depending on the theories and practices of dynamic disasters in coal mines.…”

Section: Introductionmentioning

confidence: 99%

Underground microseismic monitoring of a hydraulic fracturing operation for CBM reservoirs in a coal mine

Jiang

et al. 2019

Energy Science & Engineering

View full text Add to dashboard Cite

Hydraulic fracturing can evidently improve the coalbed methane production in underground coal mines, but it is difficult to delimit the stimulated area accurately. In order to evaluate the stimulated area, microseismic (MS) monitoring technique is proposed to investigate the seismic responses of the induced fractures of hydraulic fracturing. Three coal seams were targeted to be treated in a coal mine. An array of geophones was set along the underground roadway to detect the MS signals caused by HF. In order to verify the result of MS monitoring, water content of each coal seam has been measured before and after HF treatment. The results showed that a series of MS events were detected during the entire HF process, and a sharp MS event usually occurred during the first hour of HF process. The energy of the sharp MS event had higher magnitude than others. The MS distribution exhibited complex morphological features. The directionless MS response was distributed over a radius of less than 40 m but tended to be significantly conjugated with a radius of more than 40 m. HF could stimulate both the coal seam and the rock layers nearby. The achievable stimulated area in the coal seam was determined to be 50 m × 50 m according to the MS density and water content. The stimulated area in terms of MS density was easily found to be broader than the area of water direct intrusion. The present study indicated that MS monitoring technique could potentially be used for evaluation of HF in underground coal mine.

show abstract

Rock burst assessment and prediction by dynamic and static stress analysis based on micro-seismic monitoring

Cited by 152 publications

References 29 publications

A Novel Experimental Technique to Simulate Shock Behaviour and Bursting Failure of Roadways

A Novel Experimental Technique to Simulate Shock Behaviour and Bursting Failure of Roadways

Mechanical and Heterogeneous Properties of Coal and Rock Quantified and Mapped at the Microscale

Underground microseismic monitoring of a hydraulic fracturing operation for CBM reservoirs in a coal mine

Contact Info

Product

Resources

About