Abstract:The accurate acquisition and analysis of fracture structure of rock mass is of great significance for the stability analysis of trenchless drilling rock mass in ecologically fragile areas. Based on close-up photogrammetry technology， this paper uses PhotoModeler Scanner software to process the feature point distortion and noise removal of multi-directional rock mass images to achieve accurate extraction of three-dimensional information of dense point clouds， and then establish a triangular mesh， establish dense surfaces according to the triangular network， and finally render the surfaces through data visualization to realize the three-dimensional modeling of rock masses. The established 3D model fracture morphology tends to be consistent with the original fracture， which can realize non-destructive picking and observation of fracture length， average width， area and other parameters， and compare the obtained fracture information， and the results are consistent with the visually reflected fracture development degree.

Abstract:Green geological exploration is an inevitable trend for geological prospecting in Qinghai Province and even in China. It is necessary to understand the influence scope and form of geological exploration engineering on environment for green geological exploration; on this basis, a variety of advanced exploration technologies can be combined to minimize the degree of disturbed surface ecological environment to realize geological prospecting in pre investigation and survey stages. Environment-friendly flushing fluid, shallow sampling, shallow hole drilling with portable drilling equipment, deep drilling with heavy drilling equipment and multi-branch directional sampling drilling are involved, and by means of comprehensive collating data, 3D modeling method is explored to carry out green geological exploration.

Abstract:The influence of the tunnel construction, mining and other human engineering activities leads to the serious drainage of groundwater in Chongqing mountainous area, vegetation destruction, which directly affects the ecological environment of the 5473km2 range of Chongqing urban economic circle. Through the drilling engineering of 20 holes with total drilling footage of 4646m, pumping and water pressure tests were carried out, the evaluation of groundwater quality and quantity in the mountainous area was made. Application of wells TV instrument for continuous imaging in the hole, using the hole logging data and imaging data, established the three-dimensional geological model. Monitoring equipment installed in the hole after completion as long-term observation sites. Real-time monitoring of groundwater dynamic changes can be realized by office computer and various types of charts can be automatically generated to provide hydro-geological parameters for the relevant departments and offers first-hand information for urban planning, engineering design and construction as well as government decision making.