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Rock bolting rigs Epiroc US

2 天之前  A fully mechanized bolting machine optimized for small to medium sized tunnel profiles. A low profile mechanized bolting machine built for low-seam mining in headings

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[Hot Item] Pz-60t Rock Bolt Pullout Test Equipments

2024.1.13  Rock Bolt Pull Out Testing Machine. Application. PZ Series rock bolt pull out test machine applies to test pull-out resistance of various kinds of rock bolt, anchor

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Rock bolt pull-out test apparatus. Download Scientific

Download scientific diagram Rock bolt pull-out test apparatus. from publication: Application of a FBG-Based Instrumented Rock Bolt in a TBM-Excavated Coal Mine Roadway Rock

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A novel rock bolting system exploiting steel particles

2022.9.1  To further explore the coupling mechanism of steel particles in a bolting system, concrete blocks with different strengths were prepared to simulate rock mass.

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(PDF) Full-scale rockbolt testing in the laboratory

2020.1.1  Rockbolting is a method used for rock reinforcement in underground mining and tunnelling. There is a large variety of different types of rockbolts with different

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Bolting equipment - mechanical industrial cutting equipment

Sandvik DS422i is a rock support drill designed for cement-grouted cable bolt installation in underground mines and tunnels. The bolter can install up to 25 meter long cable bolts

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Experimental investigation of the anchoring properties of

2022.7.18  The ultimate pulling force and the residual pulling force of the special-shaped cross-section bolt improved significantly according to the circular bolt. The

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Performance of a New Yielding Rock Bolt Under Pull and

2019.3.11  This paper presented a new yielding rock bolt, called tension and compression-coupled yielding rock bolt, which is promising to provide support for both

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Bolt Pull-Out Tests of Anchorage Body under Different Loading

2014.11.13  In the bolt supporting system of roadways, under the influence of deformation and stress of surrounding rock, bolt plates move and deform with the rock

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Principles of rockbolting design - ScienceDirect

2017.6.1  The essential function of bolting is to keep the fractured rock together to form a pressure arch around the opened space. In other words, the bolts help the rock to

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Sustainability Free Full-Text Experimental Study of the

Traditional rock bolt inspection methods are destructive and limited. Non-destructive testing (NDT) based on the stress wave method can realize a fast and convenient quality detection of rock bolts. To verify the effectiveness of the stress wave-based anchor NDT method, a multi-functional experimental bench was customized on the basis of a bench-pull tension

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Full-scale rockbolt testing in the laboratory:

At the rock mechanics laboratory of SINTEF and NTNU in Trondheim (Norway), a rockbolt test rig has been developed for full-scale testing for pull, shear, and combination pull-shear tests. The test rig was developed

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IS 11309 (1985): Method of conducting pull-out test on

2018.11.14  This standard covers method for conducting pull-out test on anchor bars and rock bolts is a full-column-grouted rock bolt or bar with cement-sand grout or resin and rock bolt is ungrouted mechanically anchored bolt. The anchorage may be of any type that is lot wedge type, expansion shell type, etc. 1. SCOPE.

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Pullout Test on Fully Grouted Bolt Sheathed by Different

2016.10.25  In order to evaluate the anchorage performance of rebar bolt sheathed by different length of segmented steel tubes, a total of eight groups of pullout tests were conducted in this study. The steel tubes, segmented by 5#x2009;cm, 7#x2009;cm, 9#x2009;cm, 10#x2009;cm, and 15#x2009;cm, utilized in current study were bonded

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Rock Bolt Pull Out Test Apparatus - Zeal International

ZI 6013. Standards:IS 11309, ASTM D 4435. Specification: The objective of the test method is to measure the working and ultimate capacities of rock bolt anchors. The system comprises of a central hole jack, hand pump with a load gauge, directional control value (only for central hole jacks above the capacity of 500 kn), flexible hose pipe 5 mts ...

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Standard Test Method for Rock Bolt Anchor Pull Test

2022.1.14  1.1 The objective of this test method is to measure the working and ultimate capacities of a rock bolt anchor. This method does not measure the entire roof support system. This method also does not include tests for pretensioned bolts or mine roof support system evaluation. 1.2 This test method is applicable to mechanical, cement

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Results of pull tests of rock bolts and cable bolts in Sydney

2018.4.1  This paper discusses the result of 181 pull tests of rock bolts and cable bolts in the sandstones and shales of the Sydney region. The pull tests were carried out as part of the Sydney Metro Northwest tunnelling project. The tested bolts include: end-anchored corrosion-protected steel bolts, resin-grouted fibre reinforced plastic bolts, cement ...

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Laboratory full-scale rock bolt testing: Analysis of recent

At the rock mechanics laboratory of SINTEF and NTNU in Trondheim (Norway), a rock bolt test rig has been developed for full-scale testing for pull, shear and combination pull-shear tests. The rock bolt test rig was developed in 1995, in conjunction with Gisle Stjern’s doctoral thesis. The test rig was financed by research funds and also by ...

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Dynamic and static analysis of a kind of novel J energy-releasing bolts

2020.11.19  A novel kind of energy-absorbing bolt called J-bolt was developed, which consists of anchoring (damping) module, deformation module, blending module and thread segment. The static pulling loading model and dynamic impact constitutive model of J-bolt were established. The experiment results show: (1) the static pulling load is greater than

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Laboratory pull-out tests on fully grouted rock bolts and cable bolts ...

2017.10.1  The pull-out tests performed on SSB, HA25, and FRP rock bolts are listed in Table 6. The embedment lengths tested for rock bolts are controlled within the recommended range of about [6R b, 10R b], where R b is the bolt radius. Two short embedment lengths, 90 mm and 130 mm, were used in most tests and different confining

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Standard Test Method for Rock Bolt Anchor Pull Test 1

The end of the rock bolt, or pulling rod if 5.10 Fig. 1 shows a typical test setup. used, shall be smooth with a counter-sink area approximately 1⁄4 in. (6 mm) in diameter to accommodate the measuring tip of 6. Procedure the dial gage. Other types of displacement transducers may be 6.1 Drilling the Test Hole: used provided they satisfy the ...

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Energies Free Full-Text Modified Rock Bolt Support for

2020.4.11  The article presents methods of making the rock bolt support more yieldable, especially for a stratified roof. Alongside the increasing depth of exploitation of raw material deposits, rock bolt support units are more often designed taking into account more intensive deformations and displacements of underground excavations. In the article, a

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(PDF) Full-scale rockbolt testing in the laboratory

2020.1.1  An energy-absorbing rock support device, called a D bolt, has been recently developed to counteract both burst-prone and squeezing rock conditions that occur during underground excavation.

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A load measuring anchor plate for rock bolt using fiber optic

2017.4.25  The proposed load measuring anchor plate is a normal anchor plate instrumented with FBG strain sensor. In order to measure the load of an anchor plate for a rock bolt, a 2 mm deep v-shaped groove was cut on the inner surface along a length of the plate, and an FBG was installed into the center of the groove using cyanoacrylate

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An Overview of the Use of Rockbolts as Support Tools in

2021.10.21  Martin recommended that rockbolts and cablebolts should not be used in extremely weak rock conditions or highly cracked rockmasses but can be applied in a wide range of situations.An example of effective application of rockbolts was recorded in the excavation of Tartaiguille tunnel in France. The uniaxial compressive strength (UCS) of

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In Situ Rock Bolt Pull Tests Performance in an Underground

2020.1.1  This paper presents results of 71 in situ nondestructive rock bolt and tendon pull tests conducted in the Powerhouse Complex of the Uma Oya Multipurpose Development Project, located in Sri Lanka. The pull tests are performed on 6 and 8 m Double Corrosion Protected fully and partially grouted rock bolts (high strength

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Back analysis of grouted rock bolt pullout strength parameters from ...

2012.3.1  64. 13. The initial lower limit and upper limit of the grout cohesive strength are set to be 0 Pa and 1e5 Pa, while the initial lower limit and the upper limit of the grout friction angle are set to be 0° and 90°. Hence the two initial parameters used in numerical pull-out tests are 5e4 Pa and 45° respectively.

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Studying the Bond Performance of Full-Grouting Rock Bolts

2022.4.26  This paper studied the bond performance of full-grouting rock bolts with a theoretical analysis. The variable controlling method was used to study the effect of parameters on the load-carrying force of bars. The results showed that when the bar diameter grew from 15 mm to 25 mm, the maximum force of the bars rose from 194 kN

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Rock bolt pull-out test apparatus. Download Scientific

Rock bolts have been widely applied with roadway excavation in underground coal mines to prevent roadway collapse and improve the stability of roadway surrounding rocks. Overloading and failures ...

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THE POSSIBILITIES AND LIMITATIONS OF ANCHOR SITE

2019.10.8  4 As shown in Fig. 2, the relevant testing and evaluation methods are: (a) ETAG 029 Annex B, Metal injection anchors for use in masonry, recommendations for tests to be carried out on construction works (b) ETAG 020 Annex B, Plastic anchors for multiple use in concrete and masonry for non-structural applications, recommendations for tests

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Improved probabilistic neural network PNN and

2016.2.12  The quality of the rock bolt plays a crucial role in the stability of the engineering construct, which is the core of the project. Consequently, the issue of quality inspection of anchoring systems

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Augmenting the in-situ rock bolt pull test with distributed

2020.2.1  The measured properties of weathered rock specimens were used in a numerical simulation model. Numerical studies on rock bolt surrounded by weathered rock mass were performed to simulate guided waves in the rock bolt. The results show that the group velocity and predominant frequency of the rock bolt decreased the weathering

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Studying the performance of fully encapsulated rock bolts with modified ...

2021.1.4  In this numerical simulation, the Mohr–Coulomb model was used as the constitutive law for the surrounding rock. To simulate the pulling process of the rock bolt, an initial pulling velocity of 1 × 10 –6 m per step was applied at the loaded end of the cableSELs, as shown in Fig. 5. This pulling velocity kept constant during the whole ...

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IOP Conference Series: Earth and Environmental Science

2022.1.8  Support of IoT devices can transform instrumented rock bolts into so-called smart rock bolts with innovative monitoring of rock mass data in real-time and presenting results on computers, tablets, or smartphones. The smart rock bolt consists of strain gauges, a data analyzer, and a built-in computer. 2. Methodology To demonstrate the use of ...

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Application of Wireless Sensor Network in Rock Bolt Pulling

2019.5.1  The research shows that the axial force of the full-length anchoring rock bolt increased with the increase of the load, when the load reached 28MPa, the bolt at the end of rock bolt rod slid; the longitudinal strain of the base of the end anchoring rock bolt was only affected by the top pressure, the shear stress of the middle hollow anchoring ...

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Rock Testing Machines at Best Price in India - India Business

Contact Supplier Request a quote. Stainless Steel Triaxial Testing Machine For Rock, For Industrial,... ₹ 15,85,200/ Piece. Get Quote. Stainless Steel Point Load Index Tester - Hand Operator Digital... ₹ 65,000/ Piece. Get Quote. Unconfined Compression Tester For Rock Samples - With Proving Ring... ₹ 3,24,800/ Piece.

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Rock Testing Equipments - Rock Bolt Pull Out Test Exporter

Exporter of Rock Testing Equipments - Rock Bolt Pull Out Test, Core Cutting Grinding Machine, Rock Triaxial Testing Machine and Polishing Lapping Machine offered by Veekay Industries, New Delhi, Delhi. Send Email. 08046036411 81% Response Rate .. Home: Profile: Our Product Range:

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Rock Bolt PullTest: In-situ testing of rock bolt integrity

The Rock Bolt PullTest was designed by YieldPoint to accurately measure the performance of rock bolts. The Rock Bolt PullTest system is specifically engineered and designed to test the integrity of rock bolts in underground excavations and return immediate digitised data. Geosystems supply both the electronics and the hydraulics for the system.

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Numerical Simulation of Anchorage Performance of GFRP Bolt

2023.2.11  We conducted anchoring performance, stress distribution, and full-scale indoor pulling tests on glass-fiber-reinforced polymer (GFRP) bolts. The tests were conducted using finite element software while considering the multi-interface contact and BK criterion by using the cohesive element to simulate the contact relations between the

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Pull out test: a) bolt pulling, b) loading by using the jack

To determine load bearing capacities of new rock bolts with varying angles of the conic parts and expansion properties, a series of deformation controlled pull-out tests were carried out by using ...

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