巨厚冲积层薄基岩煤层底板区域防治水地面定向钻探技术

赵固一矿18011工作面上覆巨厚冲积层,煤层顶板基岩较薄,应用地面定向钻探注浆技术改善采煤工作面底板状况,消除煤炭开采时底板突水水害威胁。通过应用地面多分支定向钻孔技术,全面覆盖工作面探查治理区域,有效降低钻探施工成本,提高施工效率。通过选择"绿色"钻井液处理剂并进行分段钻井液设计,有效降低钻探施工对环境的影响,避免钻探事故,克服钻探技术难题。     

城市公共领域微更新驱动的整体提升行动——《广州天河中央商务区整体提升行动纲要》

By analyzing master planning of the Overall Improvement Initiative for Tianhe Central Business District, Guangzhou, this paper focused on the overall improvement initiative driven by micro regeneration in the urban public realm. To deal with challenges such as a variety of issues, multiple stakeholders, and long time span in this initiative, the planning team came up with a systematic roadmap including three stages, i.e. fundamental principals, design strategies, and implementation measures. In response, they built a goal-oriented Holistic Quintuple-Value System, drew Three Urban Public Realm Maps on urban governance, and launched the pilot action projects based on the “Influence-Complexity Matrix”. Additionally, the team valued public participation and feedback, and played diverse roles, e.g., consultant and organizer for public participation events, promoter for communication of communities, and propellant for project implementation. The Initiative has been reviewed and legalized in 2019, wherein, the implemented ones by stage since 2020, not only enhance the regional governance in Guangzhou, but offer references to urban governance and space quality improvement of the built areas in downtown metropolis of the same kind.