Sonic travel time logging of exploration boreholes is routinely used in Australia to obtain estimates of coal mine roof rock strength. This paper describes research aimed at developing a correlation for use in the U.S. ... (NIOSH) Section Navigation. ... In situ rock strength measurement Quantitative analysis Roof quality Uniaxial compressive ...
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Энэ нь чулуулгийн материалын бат бэхийн параметрийг цэгийн ачааллын индексийн индекс, uniaxial шахалт, суналтын бат бэх, чулуулгийн массын ангилалын систем зэрэг бусад хүчирхэг параметрийг ...
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The sonic log may be used to determine porosity by charting the speed of a compressional sound wave as it travels through the formation. Interval transit time (∆t), measured in microseconds per meter …
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@article{osti_7075797, title = {Predicting uniaxial compressive strength from log parameters}, author = {Tokle, K and Horsrud, P and Bratli, R K}, abstractNote = {Models for prediction of in-situ rock behaviour often suffer from lack of relevant input data, especially rock strength data. Rock mechanical testing of cores provides only discrete data points.
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uncommon. Laboratory uniaxial tests can provide the correlations of rock strength with logs where the stress at shear fracture in a core specimen is correlated to the value of the log properties at the core sample depth. However, the lab data is available only for the intervals where the well was cored and does not account for in-situ strength.
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Channel Velocity Log 1. st. Receiver 2. nd. Receiver Receiver Spacing 1 VL2F R1 R2 20cm 2 VL4F R2 R4 40cm 3 VL6F R1 R4 60cm 4 VL2A R3 R4 20cm . UCS/SONIC CORRELATIONS . According to Oyler . et al., (2010) sonic logging has been routinely used for many years in Australia to obtain UCS estimates in coalfield strata.
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This paper describes research conducted by NIOSH aimed at developing a correlation between sonic travel time logging of exploration boreholes and estimates of …
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uncommon. Laboratory uniaxial tests can provide the correlations of rock strength with logs where the stress at shear fracture in a core specimen is correlated to the value of the log properties at the core sample depth. However, the lab data is available only for the intervals where the well was cored and does not account for in-situ strength.
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Бүтээцийг газар дээр нь угсрах хүртэлх бетон өгөгдсөн бат бэх буюу байгууламжийг барих тухайн үе дэх бетоны өөрийн жин болон бусад ачааллын үйлчлэл бат бэх байх .
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This paper describes research conducted by NIOSH aimed at developing a correlation between sonic travel time logging of exploration boreholes and estimates of …
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This paper describes research recently conducted by NIOSH aimed at developing a correlation for use by the U.S. mining industry. From two coreholes in …
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Log data included sonic, neutron, density, and gamma ray logs. The correlation developed is applicable to determine the quantity of compressive strength of …
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correlations between the uniaxial compressive strength (UCS) and the sonic velocity. This paper describes 27 research recently conducted by NIOSH aimed at developing a correlation for use by the U ...
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Зээ бад: Бат бэх, хүчирхэг байдлыг илэрхийлнэ. Монголын эртний уран барилгын чимэглэлд өргөнөөр ашиглаж ирсэн бөгөөд Чингис хааны зүүдэнд орсон гадаад их далайн лусын хааны толгойн дүрс хэмээн домоглодог.
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UCS data computed from sonic travel time log data, with black representing the weakest roof and light gray to white the strongest roof. Vertical scale 0 to 40 ft. Plot width approximately 8000 ft.
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3.2. Uniaxial compressive strength (UCS) One of the most important parameters in collapse mechanism and rock failure is uniaxial compressive strength of rock. Rock failure can occur in different ways, depending on the type of bit. Mason showed that hardness and uniaxial compressive strength of rock formation depend on the shear …
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бэх зуурах - бэх шингэлэх. бэх идүүлэх - бийрний үсийг бэхэнд дүрэх. бэхийн далай - тойрох суваг татаж хийсэн дүгрэг их зууруул. бэхийн суурь - бэх тавих бага ширээ. бэх болох - бат бөх болох ...
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correlations between the uniaxial compressive strength (UCS) and the sonic velocity. This paper describes research recently conducted by NIOSH aimed at developing a correlation for use by the U.S ...
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Uniaxial compressive strength (UCS) was conducted on 9 rock samples of sandstone and the result values is the maximum compressive strength value was 88.44MPa and minimum value was 25 As can be ...
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This paper posed a trial to obtain compressive strength profile of oilfield's formation from a sonic log. According to the results, the formations have been divided into several groups from very soft to very hard formation to optimize bit selection. ... Later, this method is used to predict uniaxial compressive strength in the entire of ...
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@article{osti_1749943, title = {Predicting uniaxial compressive strength from empirical relationships between ultrasonic p-wave velocities, porosity, and core measurements in a potential geothermal reservoir, Snake River Plain, Idaho}, author = {Kessler, James A. and Schmitt, Douglas R. and Chen, Ximei and Evans, James P. and …
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Johan Casagua. This work proposes the use of a non-invasive technique to determine the compressive strength of concrete, with the purpose of not affecting the quality of the concrete and its ...
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The goal of this NIOSH (National Institute for Occupational Safety and Health) study was to evaluate UCS changes occurring in a broad range of weak coal measure rocks over a one-year time span. The study found the highest moisture contents were measured when the core was fresh, immediately after it was taken from the hole.
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For the entire data set, the relationship between UCS and sonic travel time is expressed by the following equation, where UCS is in psi and t is the travel time of the P-wave in microsec/ft. UCS = 468,000 x e-0.054t. The r-squared value for this equation is 0.87, indicating that a strong correlation between sonic travel time and UCS can be ...
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Бүтээцийг газар дээр нь угсрах хүртэлх бетон өгөгдсөн бат бэх буюу байгууламжийг барих тухайн үе дэх бетоны өөрийн жин болон бусад ачааллын үйлчлэл бат бэх байх .
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Basic Concept. Sonic borehole logging has been used since the 1950's to estimate seismic and physical properties of the formations surrounding a borehole. Sonic-logging methods can either measure 1) seismic-wave transmission (i.e., sonic, acoustic, acoustic waveform, and full-waveform sonic), 2) cement bonding, or 3) acoustic …
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sonic log data (Payne, 2008). At Crinum a sonic velocity-to-UCS correlation was established during initial mine exploration by running sonic logs and testing 150 core samples. Sonic logs were obtained
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Abstract Sonic logs have been used successfully for estimating strength and static elastic moduli for coal measures strata at 18 sites in N.S.W. and Queensland, and empirical relationships between these geotechnical parameters and sonic log interval transit time are presented. Sonic logs are particularly sensitive to strength variations in …
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Fig. 16.1 The geophysical wavetrain received by a sonic log. There are complex tools that make use of both P-waves and S-waves, and some that record the full wave train full waveform logs(). However, for the simple sonic log that we are interested in, only the first arrival of the P-wave is of interest. The time between the transmission of the ...
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Generally, typical travel times of sedimentary rocks range from 40 to 140 / . They are bounded by the travel times of P-wave in quartz (sandstone matrix), calcite (limestone matrix), and water ...
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where ∆d is the specimen's size, ∆t is the transit time of the pulse in the specimen, and Vp is the P-wave velocity.. 3.4 Determination of UCS. The uniaxial compression test (UCS) was performed using the standard ASTM (1995) AMERICAN SOCIETY FOR TESTING AND MATERIALS. ASTM. D2938-95 (2002): Standard test method for unconfined …
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Хоёр, гурван өдрийн дараа энэ тоо 40 ба 50% хүртэл өснө. 5, 7, 14 хоногийн дараа брэндийн бат бэхийн хувь 65, 75 ба 90 хувьтай тэнцэнэ. Бетоны бат бөхийн график 30 ° С-д ялимгүй ялгаатай байна. Өдөр, хоёр ...
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Log porosities were calculated from density, sonic and neutron logs, before starting the calculation borehole assessment and conditions were studied to ensure logs quality. 2.2.4. Sonic travel time Sonic travel time is one of the rock physical properties which mostly are used for reservoir evaluation and rock mechanical studies.
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Topics & resources with guidance to assist employers and responders to achieve worker safety and health during emergency responses. The Occupational Safety and Health Act of 1970 established NIOSH as a research agency focused on the study of worker safety and health, and empowering employers and workers to create safe and healthy workplaces.
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gtis -нд ЗАМ, БАРИЛГЫН МАТЕРИАЛЫН ЛАБОРАНТ - БЕТОНЫ ШИНЖИЛГЭЭ ХИЙХ хэвлүүлэв. ЗАМ, БАРИЛГЫН МАТЕРИАЛЫН ЛАБОРАНТ - БЕТОНЫ ШИНЖИЛГЭЭ ХИЙХийн онлайн хувилбарыг уншина уу. 1 …
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Because shear-wave log was only available for one well, using multivariate regression and using sonic log (V p), density logs (LLD), gamma-ray logs (GR), a relationship was obtained.The correlation between the shear wave obtained from the multivariable regression and the actual value of the shear wave is about 90%; same …
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Sonic logs. A sonic log is an acoustic log that emits sound waves which start at the source, travel through the formation, and return back to the receiver [1]. The travel time from the source to the receiver is called slowness and as a result sonic logs are sometimes referred to as sonic slowness logs.
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In order to develop an exponential correlation, log, drilling data, and backward simulation were used. Log data included sonic, neutron, density, and gamma ray logs. The correlation developed is applicable to determine the quantity of compressive strength of underground formations in absence of cores.
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correlations between the uniaxial compressive strength (UCS) and the sonic velocity. This paper describes 27 research recently conducted by NIOSH aimed at developing a …
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