Abstract
The safe and efficient mining of deep coal resources is severely restricted by the dynamic disasters caused by high gas and high ground stress. Taking a deep mine in China as the research background, a mechanical model of the front supporting stress with the working face was constructed through theoretical calculations. Based on the limit equilibrium theory, the stress distribution in the plastic zone and the elastic zone of the lateral working face was derived; based on semi-infinite plane mechanics model, the floor vertical and horizontal stress distribution was deduced. Then, the roadway surrounding rock stress and displacement field distribution evolution characteristics were revealed through numerical simulation. On this basis, the reasonable floor gas drainage roadway (FGDR) layout was determined: internal staggered layout was used with FGDR, the vertical distance to the working face is 20 m, and the horizontal distance to the working face end is 15 m; the open-off cut of FGDR was arranged in an external staggered layout, the vertical distance to the working face is 20 m, and the horizontal distance to the open-off cut of the working face is 15 m. It is an important practical significance for the layout of FGDR, the control of surrounding rocks, and the improvement of gas drainage effects under similar conditions through the research results.
Highlights
Among the main coal mining countries in the world, such as the United States, Australia, Germany, the United Kingdom, Poland, and Russia, other mining industries are relatively developed, while Germany and Russia enter deep mining earlier
With the increase of coal mining depth, it is mainly faced with the problems of high gas, high ground stress, and high ground temperature, especially the compound dynamic disaster caused by high gas and high ground stress, which seriously restricts the safe production and becomes the bottleneck restricting the safe and efficient mining of deep coal resources
Due to the double effects of driving and mining stress, the surrounding rock of roadway, especially the floor, is continuously deformed. The key parameters such as vertical distance and horizontal distance between floor gas drainage roadway (FGDR) and coal seam roadway directly affect the amount of drilling work, gas drainage amount, and protection effect
Summary
Among the main coal mining countries in the world, such as the United States, Australia, Germany, the United Kingdom, Poland, and Russia, other mining industries are relatively developed, while Germany and Russia enter deep mining earlier. Shoushan No 1 Coal Mine of Henan Pingbao Coal Industry Co., Ltd. has an average buried depth of more than 750 m, stratum dip angle of 8-12°, and well-developed geological structure Due to the double effects of driving and mining stress, the surrounding rock of roadway, especially the floor, is continuously deformed The key parameters such as vertical distance and horizontal distance between FGDR and coal seam roadway directly affect the amount of drilling work, gas drainage amount, and protection effect. The evolution characteristics of floor stress distribution caused by upper coal seam mining have great influence on the location selection and surrounding rock control of FGDR. For the high gas outburst mine under specific conditions, the selection of reasonable FGDR layout still needs to be combined with the field production conditions for differential research
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
