A novel method for evaluating proneness of gas outburst based on gas-geological complexity
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A novel method for evaluating proneness of gas outburst based on gas‑geological complexity Guo‑Ying Wei1,3,4 · Fang‑Chao Kang1,2 · Bin‑Bin Qin1 · Tian‑Rang Jia1,3,4 · Jiang‑Wei Yan1,3,4 · Zhen‑Dong Feng1,3,4 Received: 24 November 2019 / Accepted: 21 August 2020 © Springer Nature B.V. 2020
Abstract The gas outburst, resulting in substantial economic losses and even casualties, is the biggest obstacle in coal mines, mostly caused by an imbalance of gas-geological structure. For accurately measuring this proneness, in this paper, a novel evaluation method was proposed based on the gas-geology theory. In this method, a standardization model of statistical units was presented first, which was used to standardize and quantify the 12 chosen gas-geological factors; and then, an associated function was established for computing the gas-geological complexity index (GCI). With increasing GCI values, the evaluated area was divided into four grades: simple, medium, complex, and extremely complex region, in which the associated proneness of outbursts was SAFE, POTENTIAL, HIGH, STRONG, respectively. Taking the XueHu Coal Mine as an example, site verification was carried out with a good result. Research and application indicate that (1) gas outburst is unbalanced and closely related to the complex of the gas geological structure, showing a greater GCI leads to a higher outburst possibility; (2) the most likely area for the gas outburst is the extremely complex region and the transition zone between adjacent areas with different GCI grades; (3) upgrading-targeted control measures are the best way for preventing and controlling disasters caused by the gas and outburst unbalanced distribution. This novel method provided a reliable quantity approach for predicting and zonally managing gas outbursts and improving the effectiveness of outbursts prevention. Keywords Gas outburst · Coal geology · Gas outburst proneness · Gas-geology complexity index
* Fang‑Chao Kang [email protected] 1
State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454003, Henan, China
2
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
3
National Coal Field Engineering Research Center for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454003, Henan, China
4
Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Henan Polytechnic University, Jiaozuo 454003, Henan, China
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Natural Hazards
1 Introduction Unusual gas emissions and outbursts cause the most destructive accidents in underground coal mining, bringing both damages to equipment and loss of life (Otuonye and Sheng 1994; Zhou et al. 2014, 2017). With the improvement in gas control technology and the strengthening of safety awareness in engineering technicians, most such incidents have been controlled in China (Wang et al. 2019, 2020; Zhi and Elsworth 2016). However, owing to t
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