Abstract:The paper introduces the 121 Coalfield Brigade of Fujian province on their keeping up with the frontier science and technology in China, and actively carrying out technical research in the Eleventh Five-year Plan. By the technical innovation; application of the new technology and management mode reformation, the ability of deep-hole drilling and drilling efficiency have been greatly improved.

Abstract:The paper introduces the achievements of exploration engineering in nonmetallic building material mineral resources exploration in China during the Eleventh Fiveyear Plan. The problems are analyzed and the working focuses in the Twelfth Fiveyear Plan are put forward.

Abstract:The importance of drilling mud cooling is explained in terms of the storage temperature and pressure of gas hydrate. The structure, operational principle and design process of the mud cooling system for gas hydrate drilling are introduced with the field experiment. Of the system in the Chinese permafrost zone gas hydrate drilling. The experiment has proved that this system completely met the design requirements and for the first time successfully recovered the gas hydrate sample in the permafrost zone of the QinghaiTibetan plateau.

Abstract:The paper introduced the double channel parallel wells about the trajectory design, application purpose, problems encountered in the first application and the countermeasures with the case of H022UA well in Beypazari natural alkali mine of Turkey. In spite of the difficulties of ore bed uplift, small target cavity, difficult drilling and drilling in unknown cavity, H022UA was connected successfully at last by the effective technical measures.

Abstract:It is very difficult in the coalfield drilling process because rather complex strata are usually encountered; such as breaking layer, collapsing layer and hydration expansive layer. Heavy density and low filtration drilling fluid system were developed with antisloughing, inhibiting and proper density. Field application proves that the drilling fluid system can perfectly maintain borehole stability and effectively inhibit the hydration expansion of mud stone and shale with the accident rate in wireline coring drilling decreased.

Abstract:The geological conditions are very complex at the Second Coal Mine in Fuyuan County, Yunnan: the upper thick layer of limestone of the Yongning Town group is broken with falling stones and serious leaks, and cavities are also developed; while the lower coal stratum consisting mostly of water sensitive formation, such as mudstone, muddy siltstone, carbonaceous mudstone, is susceptible to hydrate expansion, contraction, and collapse, increasing the difficulty in borehole wall protection. Taking these factors into account, a solidfree drilling fluid with LG plant colloid is used to drill through a 6m thick coal without collapse against circulation loss, leading to good protection, and economical, safe, and fast completion of the well.

Abstract:At the present, the work of deep minerals exploration in the second space is playing an important role in Geoexploration. In the exploration process, we must not only focus on applying the new theories and technologies of physic, chemistry and remote sensing in our field, but should also pay more attention to drilling technology to confirm the correctness of deduction and detection. Higher requirements on the key drilling technology and the equipment have been put forward with the prospecting depth increasing. From now on, the deep exploration is the primary work of the Geoexploration in China; based on the situation of prospecting equipment and construction technology, this paper discussed some attentions in equipment selection and the supporting construction technology.

Abstract:China-made fully hydraulic drilling machine was applied in the periphery of Lala copper mine for deep prospecting with relative drilling technical measures. A 2067.68 m depth borehole was successful constructed in the complex formation. The paper introduced the drilling technical measures.

Abstract:In dewatering near multiple subway tunnels sensitive to ground subsidence and displacement, recharge measures are often taken to control the confined water. In such a case, it is necessary to overcome hazards caused by the confined water, such as water inrush, and also reduce the harm to the surrounding building (structures). This paper discusses the ultra-deep foundation dewatering technology based on the successful case of Shanghai Shanda dewatering recharge works close to Metro line 2, 4, and 9.

Abstract:A support scheme with the pile anchor and soil nail combination is proposed through analysis of different support schemes in respect of the particular excavation conditions at the Yun Hua Urban Coast A site in Changsha, and practice has proved that the scheme is proper. The support design and the construction procedures are described in detail.

Abstract:In respect of the coring difficulties, such as high circulation loss, low stability, encountered in observatory borehole drilling in loose backfilled rubbles with many cavities and high osmosis at the TALEGHAN Reservoir project in IRAN, a solid-free, non-dispersible. Drilling fluid is concocted with the KL vegetable colloid as the main additive, which, combined with sealing agents, has achieved good results at site. The composition of the KL colloid, properties of the drilling fluid and the sealing effectiveness are described, providing some experience for drilling in similar conditions.

Abstract:According to the difficulties of borehole deviation, in-hole collapsing and block-falling, coring and installation in construction in sand gravel stratum, the corresponding technical measures were taken with good construction effect. The paper introduced the construction technology in sand gravel stratum of Hongye power station.

Abstract:The double-fluid grouting is a type of the static pressure grouting. By the fast setting of the cement slurry and the accelerating agent in the formation pore and crack, the water-permeable proof of foundation soil is increased and the disadvantageous of sand flow and seepage are controlled. The double-fluid grouting was applied in the serious leakage part of water-proof curtain project in a pump room in Dalian with good effect of anti-seepage and waterproofing.

Abstract:The southern ramp of the Beidaokou overpass is only 2.0m from the resident building at Guangyu Road, Tielin, Liaoning, which makes it impossible to construct the retaining wall with open excavation. Through comparison of various alternatives, the jet-grouting method is adopted. This article describes the jet-grouting process and its benefits.

Abstract:The oil return and feed circuit is very important to hydraulic system of rotary drilling rig, which is a key factor to the unobstructed circulation of hydraulic system and smooth start and stop of each executive element and further affects the moving components. The rational design of oil return and feed circuit is the emphases of the technical advancement of rotary drilling rig. This article introduces in detail the deficiency and improvement of oil return and feed circuit of hydraulic cooling system and analyzes the interaction between oil return and feed circuit.

Abstract:Aiming at the problem of short coring sample with skirt of φ89mm reverse circulation bit, numerical simulation analysis was made on the breaking process with finite element software ANSYS. According to the analysis results, reasonable design scheme was put forward. The further analysis was made on the new bit with finite element numerical simulation and the comparative analysis and indoor experiment on the original design were carried out. The results indicate that the optimized bit has longer, complete coring sample without skirt.

Abstract:In this paper，It’s introduced that The Actualities on Study of Gyro -inclinometer Applied to Geo-exploration briefly, and It’s expatiated that basic technological and economic requests about Gyro -inclinometer Applied to Geo-exploration, and Major Problems are Analyzed of it, and It’s advanced that ways solving these problems.

Abstract:Analysis was made on the current development situation of PDM drill both in China and abroad. By the comparison between the feature differences of PDM drill both in China and abroad, performance tests were made on different PDM drills with guidance suggestions on redevelopment of coal mine PDM drill in China.

Abstract:Lithology changes obviously in volcanic strata and the physic mechanics character of rock differs a lot. Corresponding diamond bit parameters are selected according to the physic mechanics character of rock, the service life and drilling efficiency can be greatly improved with good drilling effect and economic benefit. The paper illustrated the statistic and analysis on the service life and drilling efficiency of diamond bits with different drilling parameters in several volcanic strata, and put forward the selection principles and selection methods of diamond bit technical parameters suitable for volcanic strata.

Abstract:Description is made of the vibration reduction blasting technique and the excavation method, as well as the use of construction measurement and vibration velocity monitoring in tunnel excavation in respect of the engineering characteristics and excavation difficulty of the Zhantuo road tunnel.

Abstract:With the rapid growth of the national economy and the increasing speed of modernization construction, the projects are more and more with larger scale. Therefore， it has realistic guiding significance to study project risk management, try to explore solution project risk and find the effective ways to reduce the loss of risk. Construction of project risk assessment index system is the key for risk management, which provides the basis of further plan for project management. According to the characteristics of high slope engineering, risk index system was established.

Abstract:This article introduced the effective safety management countermeasures and technical measures taken in the project survey under the conditions of urban prosperous road section, intensive exploration points, complex geological conditions and crossing underground pipelines for urban rail transportation in Zhengzhou City, which could be the reference to similar projects in cities.

Abstract:Coring drilling is an important method of geological exploration and most of the workplaces locate in suburb district or open country; while drilling rig, drilling tower and the subsidiary pieces are almost made of metal, and the drilling equipments are protruding on the ground, which are subjected to lightning attacks. In the drilling operation, most exploration teams do not pay enough attention to lightning strike protection; there are some problems in application and installation of lightning strike protection facilities. In this paper, discussion was made on lightning strake protection for drilling operation based on the analysis on lightning strike protection system of drilling equipment by the principle of lightning strike protection.