Mining Science and Technology (China)最新文献_第5页

Ground stress and its impact on the stability of the surrounding rock in the Lüliang mining area <s:1>梁矿区地应力及其对围岩稳定性的影响

Mining Science and Technology (China) Pub Date : 2011-09-01 DOI: 10.1016/J.MSTC.2011.10.001

Liang Wang, Yinlong Lu

引用次数: 4

Application of a fuzzy analytical hierarchy process to the prediction of vibration during rock sawing 模糊层次分析法在岩石锯切振动预测中的应用

Mining Science and Technology (China) Pub Date : 2011-09-01 DOI: 10.1016/J.MSTC.2011.03.008

R. Mikaeil, M. Ataei, R. Yousefi

引用次数: 28

Effect of a cyclonic flotation column on the separation of magnesium from phosphate ore 旋流浮选柱对磷矿石中镁分离的影响

Mining Science and Technology (China) Pub Date : 2011-09-01 DOI: 10.1016/J.MSTC.2011.10.009

Guosheng Li, Jiongtian Liu, Yijun Cao, Dapeng Wang

引用次数: 16

Strata movement controlling effect of waste and fly ash backfillings in fully mechanized coal mining with backfilling face 综采回填工作面矸石、粉煤灰回填控制岩层移动效果

Mining Science and Technology (China) Pub Date : 2011-09-01 Epub Date: 2011-11-08 DOI: 10.1016/j.mstc.2011.03.003

Zhang Jixiong , Zhang Qiang , Huang Yanli , Liu Jinwei , Zhou Nan , Zan Dongfeng

引用次数: 55

Effect of magma intrusion on the occurrence of coal gas in the Wolonghu coalfield 岩浆侵入对卧龙湖煤田煤层气赋存的影响

Mining Science and Technology (China) Pub Date : 2011-09-01 Epub Date: 2011-11-09 DOI: 10.1016/j.mstc.2011.10.002

Jiang Jingyu, Cheng Yuanping, Wang Lei, An Fenghua, Jiang Haina

{"title":"Effect of magma intrusion on the occurrence of coal gas in the Wolonghu coalfield","authors":"Jiang Jingyu, Cheng Yuanping, Wang Lei, An Fenghua, Jiang Haina","doi":"10.1016/j.mstc.2011.10.002","DOIUrl":"10.1016/j.mstc.2011.10.002","url":null,"abstract":"<div><p>Chemical analysis, methane isothermal adsorption studies, and mercury porosimetry were performed on ten samples taken from the magma intrusion boundary in the Wolonghu coalfield. The physico-chemical properties of coals from the magma intrusion region are compared to those from the normal regions. The results show that the volatile content (<em>V</em><sub>ad</sub>), the limiting adsorption constant (<em>a</em>), and the initial methane diffusion rate of samples from the magma intrusion region are generally smaller than those values from samples from the normal region. The number three coal sample from the magma intrusion region has a large vitrinite reflectance, well developed macropores, a small surface area, and weak methane adsorption capacity. The number ten coal sample from the normal region has a small vitrinite reflectance, well developed micropores, a large surface area, and a strong methane adsorption capacity. The maceral of the coal samples from the magma intrusion region and the normal region are similar. The coal in the area near the magma intrusion boundary is rich in methane and is an area where coal and gas outbursts often occur.</p></div>","PeriodicalId":100930,"journal":{"name":"Mining Science and Technology (China)","volume":"21 5","pages":"Pages 737-741"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.mstc.2011.10.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90275398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Variation in the temperature field of rocks overlying a high-temperature cavity during underground coal gasification 煤地下气化过程中高温空腔上覆岩石温度场的变化

Mining Science and Technology (China) Pub Date : 2011-09-01 Epub Date: 2011-11-08 DOI: 10.1016/j.mstc.2011.03.005

Luo Ji’an , Wang Lianguo , Tang Furong , He Yan , Zheng Lin

{"title":"Variation in the temperature field of rocks overlying a high-temperature cavity during underground coal gasification","authors":"Luo Ji’an , Wang Lianguo , Tang Furong , He Yan , Zheng Lin","doi":"10.1016/j.mstc.2011.03.005","DOIUrl":"10.1016/j.mstc.2011.03.005","url":null,"abstract":"<div><p>High temperature affects rocks in a way that changes the physical and mechanical properties of them. The temperature field in rock overlying a high temperature zone has been estimated using experimental research on thermal conductivity of the overlying strata. Numerical analysis software was used to estimate rock thermal conductivity at different temperatures. These estimates were then used with COMSOL Multiphysics to perform a numerical analysis with the heat conduction model. The results show that rock thermal conductivity decreases as the temperature increases and that various lithologies show similar behavior. The thermal conductivity of each rock type differs from the others at a given temperature. Exact values for the temperature distribution in the overlying strata during the process of underground coal gasification are obtained from the numerical simulation. The temperature in the rock changes with the height and direction from the gasifier. Temperature gradients vary for different types of rock. This result provides an important reference for further study of the strength of overlying strata subject to the process of underground coal gasification.</p></div>","PeriodicalId":100930,"journal":{"name":"Mining Science and Technology (China)","volume":"21 5","pages":"Pages 709-713"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.mstc.2011.03.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90777947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Ground stress and its impact on the stability of the surrounding rock in the Lüliang mining area <s:1>梁矿区地应力及其对围岩稳定性的影响

Mining Science and Technology (China) Pub Date : 2011-09-01 Epub Date: 2011-11-25 DOI: 10.1016/j.mstc.2011.10.001

Wang Lianguo, Lu Yinlong

引用次数: 4

Abandoned coal mine tunnels＂ Future heating/power supply centers 废弃煤矿隧道“未来供热/供电中心”

Mining Science and Technology (China) Pub Date : 2011-09-01 DOI: 10.1016/J.MSTC.2011.10.011

Pingjia Luo, N. Chen

引用次数: 13

Modeling the complex and long term swelling behavior of argillaceous rocks 模拟泥质岩石的复杂和长期膨胀行为

Mining Science and Technology (China) Pub Date : 2011-09-01 DOI: 10.1016/J.MSTC.2011.10.007

R. Doostmohammadi, T. Mutschler, C. Osan

引用次数: 2

Beneficiation of a low grade limestone sample 低品位石灰石样品的选矿

Mining Science and Technology (China) Pub Date : 2011-09-01 Epub Date: 2011-11-01 DOI: 10.1016/j.mstc.2011.10.012

Rao Danda Srinivas, Vijayakumar Tadiparthi Venkata, Subba Rao Sripada, Bhaskar Raju Guntamadugu, Prabhakar Swarna

引用次数: 5