Numerical simulation research of coal and gas outburst near tectonic region in Ping ding shan mining area
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ORIGINAL PAPER
Numerical simulation research of coal and gas outburst near tectonic region in Ping ding shan mining area Xiaolei Wang 1 Received: 29 October 2018 / Accepted: 29 August 2019 # Saudi Society for Geosciences 2019
Abstract The complicated process of coal and gas outburst hinders the exploration of gas outburst mechanism. In order to better quantitatively evaluate gas outburst instability of reverse fault and normal fault combination using the RFPA2D numerical simulation software to study the coal face through fault from downthrown side to uplifted side and from uplifted side to downthrown side, the results showed that the outburst process can be divided into four stages, namely, stress concentration stage, coal-rock fracturing and splitting induced by the combinations of gas pressure and in situ stress, cracks propagation driven by gas pressure and the abrupt ejection of coal and gas; Wu 9-10-20090 belt transporter tunnel outburst occurs near the fault by the tensile failure, coal seam pressure shear failure occur, due to the fault sealing formation pressure gradient, under the influence of ground stress and gas pressure, fault and broken coal outburst risk; − 320 east outstanding is due to the fault sealing effect in coal roadway, gas pressure, coal shear failure occurs, breakage of coal is relatively serious, to highlight the accident when exposed fault; face from fault plate to increase plate driving is more likely to happen to highlight the phenomenon is determined by the conditions of gas release. Keywords Safety engineering . Coal and gas outburst . Numerical simulation . Pingdingshan mining area
China has abundant coal reserves, with a total amount of 5600 billion tons above a vertical depth of 2000 m, which accounts for 11.6% of the global coal reserves, and a proven amount of 1300 billion tons, which accounts for 11% of the global proven coal reserves. Coal is a basic type of energy in China, and its production and consumption account for approximately 68% of the total primary energy production and approximately 69% of the total primary energy consumption, respectively (Cheng et al. 2013). China’s Planning Outline for Long-term Energy Development (2004–2020) (Fan and Qin 2016) stipulates that China “will persist with an energy strategy that relies on coal as the mainstay and electricity as the center and ensures all-round development of oil, gas and new energy sources”. With its rapid economic development, China’s demand for coal is increasingly on the rise. While marked
Responsible Editor: Murat Karakus * Xiaolei Wang [email protected] 1
Department of Mining Engineering, Luliang University, Lvliang 033000, Shanxi, China
advancements have been made in new energy (e.g., nuclear power, hydropower, and wind power) technologies, the essential role of coal in China’s national economic development remains irreplaceable. The proportion of coal consumption in China’s energy structure is expected to remain as high as 50% until the mid-2050s. With the extraction of large amounts of coal, shallow dee
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