巫山望霞危岩应急勘查钻探施工方法

Construction Method of Emergency Exploration of Dangerous Rocks in Wushan

巫山望霞危岩加剧变形崩塌,严重威胁当地居民及长江航运的安全,引起重庆市人民政府及国土资源部的高度重视。危岩应急抢险勘查的钻探施工是查清危岩裂隙发育程度和延伸方向、获得岩土力学参数的重要手段。通过现场踏勘后进行难点预测并制订对策措施。采用金刚石单动双管钻进取心,成功采取了危岩基座软弱带样品;采用井中成像技术,直观地反映了危岩裂隙发育状态。在施工组织管理、设备选型、钻探工艺、井中成像技术以及安全措施等方面,为地质灾害的应急抢险勘查积累了经验。

The aggravated deformation of dangerous rocks in Wushan is a serious threat to the local residents and the safety of Yangtze River shipping. Rock drilling is the important means to make clear the dangerous rocks fracture development state and direction, and obtain rock and soil mechanics parameters. Through site survey, the difficulties are predicted for the countermeasures making. The diamond single-action and double-tube coring drilling method was adopted, the samples was taken in soft zone of dangerous rock base ; borehole imaging technology was used to reflect the development state of rock fracture. The experience is accumulated for emergyey rescue in construction organization management, equipment selec- tion, drilling technology, borehole imaging technology and safety measures.