International Journal of Oil, Gas and Coal Engineering

Volume 8, Issue 5, September 2020

  • Secondary Gob-side Entry Retaining Technology with Double Side Roof Cutting and Pressure Relief in Thin Coal Seam

    Luying Shao, Bingxiang Huang, Xinglong Zhao

    Issue: Volume 8, Issue 5, September 2020
    Pages: 91-102
    Received: 31 August 2020
    Accepted: 14 September 2020
    Published: 23 September 2020
    Abstract: In order to solve the problems of stress concentration and large deformation of surrounding rock of secondary gob-side entry retaining in thin coal seam caused by hard overhanging roof, the method of cutting off overhanging roof on both sides of roadway by manual pre-cutting seam is adopted. It can transfer high stress to goaf on both sides of road... Show More
  • Experiment Study on Coal Roadways Roof Monitoring Based on the Pre-stretched Optical Fiber Lay out at Fixed-points

    Tao Hu, Su Bu, GY Hou, Yan Wang, Ziyi Hu, Zixiang Li, Jinping Liang, Yuliang Zhou, Haoyong Jing

    Issue: Volume 8, Issue 5, September 2020
    Pages: 103-115
    Received: 24 September 2020
    Accepted: 30 September 2020
    Published: 7 October 2020
    Abstract: The safety monitoring of coal roadways roof is the key to prevent roof accidents and ensure coal mines safety. However, the monitoring blind zones caused by traditional methods is one of the main reasons of frequent roof accidents. To ensure the safety of coal mines production, a novel roof monitoring method is proposed in this paper, which is base... Show More
  • Economic Evaluation of Beneficiating Nigerian Bentonite Using Periwinkle Shell and Mucuna Solannie

    Kevin Chinwuba Igwilo, Anthony Kerunwa, Bala S. Zakka, Izunna Chinemelum Okeke

    Issue: Volume 8, Issue 5, September 2020
    Pages: 116-123
    Received: 12 September 2020
    Accepted: 24 September 2020
    Published: 17 October 2020
    Abstract: According to past studies, Nigerian Bentonites are found to be deficient in both fluid loss and rheological properties. Due to the deficiency of the Nigerian bentonite (NB), a good majority of bentonites used within Nigeria are imported. This research work seeks to evaluate the economic profitability of beneficiating the fluid loss and rheological ... Show More