Wulin Lei, Xuanhong Du, Dingding Zhang, Jian Wang, Rili Yang, Chao Zheng, Xu Huang, Siyang Wang, Jian Zhao, Juheng Cao
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The results show that: the stress at the critical depth of impact ground pressure is 16.44 MPa, and the coefficient of unloading degree <i>C</i> = 0.5 is the indicator of sufficient unloading; the unloading effect of the protected layer decreases with the increase of layer spacing, lithological strength, and length of the working face, and increases with the increase of mining height; the geological and mining parameters of the protected layer show a functional relationship with the critical depth of the unloading, and the order of the influence of pressure relief effect is layer spacing > mining height > interlayer lithology > working face length. The results of the study are very important for the determination of the mining parameters of the protective layer, the estimation of the protective effect, and the design of the management programme of impact pressure.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":null,"pages":null},"PeriodicalIF":3.5000,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.1914","citationCount":"0","resultStr":"{\"title\":\"Sensitivity analysis of geological mining influencing factors on the pressure relief effect of upper protective layer mining\",\"authors\":\"Wulin Lei, Xuanhong Du, Dingding Zhang, Jian Wang, Rili Yang, Chao Zheng, Xu Huang, Siyang Wang, Jian Zhao, Juheng Cao\",\"doi\":\"10.1002/ese3.1914\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>To study the influence of different geological and mining factors on the decompression effect of protective layer mining, a numerical simulation was carried out using FLAC<sup>3D</sup> numerical software. Taking the Hulusu coal mine as the engineering background, numerical simulation studies were carried out under different mining heights, working face lengths, interlayer lithologies and layer spacing by using FLAC<sup>3D</sup> numerical software, and the effects of different geological and mining factors on the degree of decompression and the scope of decompression were quantitatively investigated through the control of single-factor variables. 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引用次数: 0
摘要
为了研究不同地质和采矿因素对保护层开采减压效果的影响,利用 FLAC3D 数值软件进行了数值模拟。以葫芦素煤矿为工程背景,利用FLAC3D数值软件对不同采高、工作面长度、层间岩性和层间距进行了数值模拟研究,通过控制单因素变量,定量研究了不同地质和开采因素对减压程度和减压范围的影响。结果表明:冲击地压临界深度应力为 16.44 MPa,卸载度系数 C = 0.5为充分卸压指标;保护层卸压效果随层间距、岩性强度、工作面长度的增加而减小,随开采高度的增加而增大;保护层地质、开采参数与卸压临界深度呈函数关系,卸压效果影响顺序为层间距>开采高度>层间岩性>工作面长度。研究结果对确定保护层开采参数、估算保护效果、设计冲击地压治理方案具有重要意义。
Sensitivity analysis of geological mining influencing factors on the pressure relief effect of upper protective layer mining
To study the influence of different geological and mining factors on the decompression effect of protective layer mining, a numerical simulation was carried out using FLAC3D numerical software. Taking the Hulusu coal mine as the engineering background, numerical simulation studies were carried out under different mining heights, working face lengths, interlayer lithologies and layer spacing by using FLAC3D numerical software, and the effects of different geological and mining factors on the degree of decompression and the scope of decompression were quantitatively investigated through the control of single-factor variables. The results show that: the stress at the critical depth of impact ground pressure is 16.44 MPa, and the coefficient of unloading degree C = 0.5 is the indicator of sufficient unloading; the unloading effect of the protected layer decreases with the increase of layer spacing, lithological strength, and length of the working face, and increases with the increase of mining height; the geological and mining parameters of the protected layer show a functional relationship with the critical depth of the unloading, and the order of the influence of pressure relief effect is layer spacing > mining height > interlayer lithology > working face length. The results of the study are very important for the determination of the mining parameters of the protective layer, the estimation of the protective effect, and the design of the management programme of impact pressure.
期刊介绍:
Energy Science & Engineering is a peer reviewed, open access journal dedicated to fundamental and applied research on energy and supply and use. Published as a co-operative venture of Wiley and SCI (Society of Chemical Industry), the journal offers authors a fast route to publication and the ability to share their research with the widest possible audience of scientists, professionals and other interested people across the globe. Securing an affordable and low carbon energy supply is a critical challenge of the 21st century and the solutions will require collaboration between scientists and engineers worldwide. This new journal aims to facilitate collaboration and spark innovation in energy research and development. Due to the importance of this topic to society and economic development the journal will give priority to quality research papers that are accessible to a broad readership and discuss sustainable, state-of-the art approaches to shaping the future of energy. This multidisciplinary journal will appeal to all researchers and professionals working in any area of energy in academia, industry or government, including scientists, engineers, consultants, policy-makers, government officials, economists and corporate organisations.