钻探方法确定岩体结构面产状  

Directly determining the occurrence of rock mass structural plane using drilling method

作　　者：石永泉[1] 代常友[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家专业实验室,四川成都610059

出　　处：《中国地质灾害与防治学报》2007年第1期120-123,共4页The Chinese Journal of Geological Hazard and Control

摘　　要：在许多地下工程中,均需确定岩体结构面产状。文章阐述了确定岩体结构面产状的两类方法及其主要特点。岩芯定向方法需专门的仪器设备,成本较高,工序多;钻探直接计算方法,属常规方法钻探,故成本低,但需要3个钻孔测斜资料。文章提出了采用立体解析几何法,依据3点钻孔测斜资料、岩芯层面角,确定岩体结构面产状的方法。该方法分为两种情况:①3点测斜资料——钻孔顶角和方位角不完全相同情况下,3点测斜资料取自1孔、2孔或3个钻孔均可以,可以采用2个向量的数量积方法确定岩石结构面产状;①来自3孔的3点测斜资料——钻孔顶角和方位角完全相同情况下,可以采用两个向量的向量积方法确定岩石结构面产状。该方法准确,简单、成本低、适用性强。进一步完善并发展了以往确定岩石结构面产状的方法。此方法得到了很好的验证。In many underground engineerings, determining the occurrence of rock mass structural plane is needful. Two kinds of methods and their main characters for determining rock mass structural plane occurrence are described. Core orientation needs special instruments and equipments, the cost is high, and the process is complex. While the cost of direct calculation with traditional drilling is low, but it needs three boreholes inclination survey data. It is advanced that the method detenTtins the occurrence of rock mass plane using analytical geometry method, by three-shot boreholes inclination survey data and core structural plane rake. It has two kinds of cases：①in case of three boreholes inclination survey data, borehole vertex angle and azimuthal are not the same, three-shot boreholes inclination survey data may be from one borehole, two boreholes or three boreholes, determining the occurrence of rock mass structural plane can use the way of scalar quantity product of two vectors ;②in case of three boreholes inclination survey data, borehole vertex angle and azimuthal from three boreholes are all the same, determining the occurrence of rock mass structural plane can be by the way of vector product of two vectors. The method is accurate, convenient, low cost and well applicable, and improves arid develops the traditional methods. This method is proved by an example.

关 键 词：岩体结构面 产状 立体解析几何 钻孔 向量的数量积 向量的向量积 

分 类 号：P313[天文地球—固体地球物理学] P583[天文地球—地球物理学]