Abstract:The current situation and the level of technique development in a disciplinary field can be reflected by its periodical literature. Based on the statistics on published papers in Exploration Engineering (Rock & Soil Drilling and Tunneling) from 2006～2010, analysis was made on the present situation of periodical literature in the field of exploration engineering in one side, comparing with the periodical literature of other disciplinary fields, selfinadequacy and shortcoming were found out to improve the integrative qualigy and the level of periodical literature in exploration engineering and promote the academic influence.

Abstract:Analysis was made on the research results of components of upward cuttings in geological drilling process in Ukraine with cutting components research methods by All-Russian Petrol Drilling Institute, which can be the theoretical basis of flushing fluid selection.

Abstract:The loose, broken, collapsed and watersensitive formations are often encountered while drilling in the sedimentary formations, which were mainly dealt with cement sealing and casing cementing in the past with high drilling cost, low efficiency and great labor intensity in the past. Along with the appearance and development of non-solid drilling fluid technology, effective solutions are provided to overcome difficulties in sedimentary rock drilling. The paper introduced the research on nonsolid drilling fluid technology and its application effect in complex sedimentary formation drilling by application example.

Abstract:There are difficulties for drilling in foreign country not only in construction technology but also in the construction environment, language and some others never encountered. The paper described the difficulties of drilling construction and the solution in a gold deposit of Laos.

Abstract:With the collection of the prophase data and the hole deviation problem, the paper introduced the formation situation and orebody features of Sunjiazhuang mining area in Shanxi. Analysis was made on the hole deviation and the causes with the summary on change of borehole deviation and the features in this mining area. The borehole structure, drilling tool grading, case selection, primary directional drilling and deviation prevention measures were described. The drilling construction effect showed that the primary directional drilling and deviation prevention measure were feasible and reasonable.

Abstract:The geological structure is complex in Jiakui coalfield with fractured rocks, loose cementation, frequent formations changing and fault fracture zone, so there are the problems such as many downhole accidents, low coring rate and low drilling efficiency. By the wire-line coring hydro-hammer technology, these technical difficulties were solved with less auxiliary time, improved drilling efficiency and coring rate and the borehole quality was ensured.

Abstract:DP6 well is a long horizontal well in Daniudi gas field, its designed kickoff point was at 2510.00m depth, drilling with average building up rate of 4.85°/30m to target A in φ311.15mm borehole, and penetrating the target strata at 3033.05m depth with increasing angle to underlie coal seam. Upregulating the vertical depth of target point and sidetracking were adopted to avoid coal seam collapse. The paper analyzed sidetracking technology, selection of sidetracking point, trajectory adjusting for sidetracking, difficulties in large hole deviation sidetrack drilling and the relative technical measures; and introduced the drill assembly and construction of sidetracking.

Abstract:This article describes common accidents of geothermal well surface casing in Beijing with the handling technology by 2 successful cases. One is the break at thread connections of geothermal well surface casing; the other is the pulling scrach in the wall of geothermal well surface casing. Some technical measures for prevent surface casing accident were put forward.

Abstract:Cementing protection is a common method of borehole wall protection in solid core drilling, but it is not an easy process at the same time. According to the slurry performance and its fluidity in the borehole, analysis and comparison were made with practical grouting experience in ZK3901. It was concluded that when different grouting method and slurries with different water-cement ratio were applied at different hole depth, the wall protection effects were different also.

Abstract:The necessities of drilling and sampling in soft coal and CBM in China and the special requirements for sampling tools are put forward. Based on the summary on the techniques of improving recovery rate and coring quality, the paper described and analyzed the structure of new drilling tool for soft coal and gas drilling. Coal sampling tools should have the functions of single action, advance, exclusion of water, anti-vibration and thread off prevention; and besides, gas sampling tools shoule have more functions of sealing, freezing and gas collecting.

Abstract:The paper briefly described the current situation of the development of XD series fully hydraulic driving core drill and analyzed the drill about its features, structure composition, performance parameters and the application.

Abstract:For the exploration demand in the areas difficult to get in, a high efficient, applicable, full-hydraulic pressure GLX-50 crawler drilling machine was developed. This paper mainly introduces the GLX-50 crawler drilling machine about its structure characteristics, technical parameters and the test results.

Abstract:The low drilling efficiency in medium hard rock construction for coal bed gas hole, mine vent, cable openings and holes and water source well； high drilling cost in water shortage area, water encounter collapsing and diameter shrinkage were all overcome by using RD20Ⅱ drill and air downhole hammer drilling technology. Based on the introduction of structure characteristics of RD20Ⅱ drill and QL series of downhole hammer, the paper summed up some problems in air downhole hammer drilling with solving thoughts and measures.

Abstract:The undamaged drilling and cutting technology was applied in the rapid renewal and reformation project for Baosteel No.2 blast furnace, including high precision horizontal borehole, static horizontal cutting of whole foundation, grouting filling, uplift integral translation and the equipments.

Abstract:A subway station in Tianjin is adjacent to Beihuan railway, the influence of eccentric loading produced by railway subgrade and dynamic load of driving train is indispensable. The paper described the construction plans and measures of excavation reinforcement, dewatering and sealing, these could be the reference to the design and construction for similar project.

Abstract:In the caisson protection engineering for a heavy punch in Changchun tractor factory, because of the former improper underground dewatering measures, the workshop wall cracking and collapsing occurred. By the serious analysis and study, a treatment plan of comprehensive treatment with dewatering, water injection, underpinning and deformation observation were made, the uneven settlement was effectively controlled with successful caisson lowering. Through the observation and comprehensive evaluation, the technology showed its good effect. The paper introduced the comprehensive treatment technology in this caisson protection engineering.

Abstract:The lateral shift was found in the 2-4 spans of a bridge position with cracks even fracture after a bridge construction and rectification and consolidation must be made without demolishing the bridge. By research and demonstration on schemes of bridge rectification and consolidation, a group of convenient, practical and economic construction method was summed up. The paper introduced the consolidation scheme, construction technical measures and rectification effect.

Abstract:As a new supporting form, soil nailing has been widely used for its easy construction and low cost in recent years. However, it has some inevitable limitations in dealing with deep foundation pit or in limited space. This paper introduced the engineering application case of soil nailing combined with the pile-anchor, summed up the design experience of soil nailing combined with pile-anchor in foundation excavation support.

Abstract:Water control is one of the difficulties for mining in undation mine. How to effectively control the water is a bothering problem and is a system project. By the practice of water control extension engineering, the successful application experience of curtain grouting with new hardening slurry of modified clay is discussed, which is a beneficial exploration for water control project in undation mine

Abstract:Large amount of wastewater is discharged to the ground surface in coal mining with environment pollution. Large-diameter recharge well and water decontamination plant are constructed to solve the problem. After the treatment, part of mine drainage is used in coal production and the rest is injected into the ground through recharge well to realize water resource cyclic and energy-saving & emission reduction. With the project case of Wutongzhuang mine, the water decontamination and recharge treatment are introduced.