Research on the theory and method of reduced-hole …
The originally proposed Gonghe Village Tunnel was constructed by using the traditional drilling and blasting method, which led to the problems of a large number of blasting holes, high drilling intensity, excessive crushing of stones, and serious over excavation, as shown in Fig. 2.The number of boreholes for conventional tunnel drilling and blasting is estimated on …
Study on comprehensive utilization and management of …
Based on the investigation results of the comprehensive utilization technology of tunnel slag in expressway, the author finds that the comprehensive utilization effect of tunnel slag can be …
Drilling and blasting as a tunnel excavation method
Specifically, the look-out angle is the angle between the practical (drilled) and the theoretical tunnel profile. If the contour holes are drilled parallel to the theoretical line of the tunnel, ...
CN110540275A
the invention relates to an application of a hole slag material in tunnel sewage treatment, and belongs to the technical field of hole slag recycling and sewage treatment. The invention crushes and screens the hole slag material into particles with the diameter of 30-150 μm, dries and calcines the particles into porous material which is used as an additional medium in the …
Study on mechanical property and breakage behavior of tunnel slag …
The materials used in this study were obtained from a road construction field in the mountainous area of southern Zhejiang province in China. The tunnel excavation site is shown in Fig. 1.In the laboratory, sieve analysis was utilized to screen the material obtained from the road construction site and obtain its typical grain-size distribution of CRS, as presented in Fig. 2.
(PDF) Performance Evaluation of Tunnel-Slag …
The application of tunnel-slag-improved high liquid limit soil as filling materials in subgrade is a green environmental technology. This study explored the influence of tunnel slag mixing on the ...
Crab-claw type filling device for filling slag into mine blast holes
Rake formula device ramming machine belongs to the machinery filling, is discharged to aperture rock slag on every side in the time of can making full use of the perforation of rotary drill or down-the-hole drill and clogs economical rationality.The disclosed patent of domestic machinery filling is CN200520089943.2; This patent design can reduce working strength of workers; Improve the ...
Cutting, Wear and Replacement of Cutting Tools During …
The advantages of the spoke type cutter head are: low equipment cost; low torque resistance, good fluidity of the slag, weak secondary crushing, suitable for silt stratum and sand layer and sandy pebble stratum with small particle size; excavation Pressure = measuring earth pressure, thus enabling effective management of earth pressure.
Study on comprehensive utilization and …
Based on the investigation of the comprehensive utilization technology of tunnel slag in expressway, the author finds that combining with the characteristics of the project, planning scientific...
Experimental Study on the Properties of Mortar and …
The results point out the direction for the quality control of tunnel slag machine-made sand concrete. ... The surface bulk density of mixed coarse aggregate was 1456 kg/m 3, and the crushing value was 10.2%. The aggregates were washed manually to clean the powder on the surface. The fine aggregate for the test is the machine-made sand obtained ...
Crushing Plant Flowsheet & Design-Layout
Crushing. To reduce run-of-mine to mill feed requires reduction in a series of stages. The physical size and power requirements of a crusher capable of reducing hard rock vary depending on the application. Extended experience in most crushing plants show that a minus 19MM (¾") rod mill feed can be and is being produced in three stages of ...
SUMMARY ON SPHERICAL WEATHERING BODY …
can be carried out with screw conveyor slag along with the process of tunnel boring machine. 4) Artificial dig hole pile Artificial dig hole pile construction is convenient, fast, and don't need of large mechanical equipment. ... The artificial blasting, static crushing in the hole The so-called treatment in the hole means strengthening on ...
(PDF) Utilization of Tunnel Waste Slag for Cement-Stabilized …
Prior to the crushing process, the tunnel waste slag underwent initial screening to eliminate stones and impurities with diameters exceeding 50 mm, such as soil, mud, vege- tation, and other ...
The Complete Guide to Tunnel Slag Treatment
The process of tunnel slag sand production mainly includes: analysis of the type and grade of tunnel surrounding rock → selection of …
Combined Cement-Polyurethane Grouting Operations in Tunnel …
Properties of a Combined Cement-Polyurethane Grout Mix. Grouting within a high water-bearing zone requires low water–binder (w/b) ratios. Combined polyurethane/cement grout mixes show good applicability concerning mixing with w/b ratios in the range of 0.6 to 0.9 [-].
CN110627446A
Preferably, the small stones and the stone chips are processed and produced by using the tunnel cave slag, and the production process comprises the following steps: after blasting excavation of III-level surrounding rocks in the tunnel, the hole slag is sorted, high-quality tunnel hole slag stone materials are selected for use to be subjected ...
Investigation of the specific charge variations in determining …
Two explosive substances, including ammonium nitrate and fuel oil (ANFO) and Amulet, are used to charge the holes located on the cross-section of the tunnels in order to advance by 3 meters.
Crushing Plant Design and Layout Considerations
crushing plant costs can be as high as $18 million. It's necessary therefore to estimate crusher ... must be provided for bins, silos and tunnels. If it is practical to obtain representative ore samples, it is prudent to have testwork conducted to establish ore flow properties, which will influence design parameters.
Tunnel Slag-MIDAS_Professional material handling …
Tunnel slag crushing and recycling. High-standard concrete block crushing & recycling. Motorway aggregate production. Mining crushing. Quartz stone crushing. Xiong'an New Area demolition. Tunnel Slag Raw material： Tunnel Slag Product： 10-20mm,or 16-31.5mm and stone powder Selected equipment：
Study on comprehensive utilization and management of …
Study on the application of tunnel slag in the pavement of Chaohui Expressway [J]. Chendu: Sichuan Building Materials,2017,43(11):181-182 [Google Scholar]
Utilization of Tunnel Waste Slag for Cement-Stabilized Base …
Prior to the crushing process, the tunnel waste slag underwent initial screening to eliminate stones and impurities with diameters exceeding 50 mm, such as soil, mud, vegetation, and other debris, in order to guarantee the cleanliness of the material. For oversized slag blocks with diameters surpassing 2 m, manual drilling and splitting ...
Drilling and blasting designs for parallel hole cut and V-cut …
The contour holes (roof holes, wall holes and floor holes) must be angled out of the contour so that the tunnel can be opened with its designed cross-sectional area.
CN103195431A
The invention provides a slag tapping system and method for a full face tunnel boring machine of a deep vertical shaft. The slag tapping system comprises a slurry discharge system, a slurry separation station, a slurry feed system and a muck improving pumping system, wherein the slurry discharge system is composed of a slurry discharge pump and a slurry discharge pipe; a …
tunnel hole slag crushing
Slag level on the opposite side of the tap hole is higher than at the tap hole and the mass of slag presses the hot metal surface below the level of the tap hole. Both hot metal and slag flow out through the tap hole until the slag level is so low that also gas can burst out. The tap hole is closed with a mud gun and the casting is over.
CN116222333A
The invention discloses a tunnel surrounding rock blasting blast hole slag remover which comprises a cleaning vehicle with a belt wheel lock function, wherein a negative pressure suction storage device, a guiding and positioning device, a vibrating and crushing device and a controller are arranged on the cleaning vehicle, and the controller is connected with a power supply; the …
Study on comprehensive utilization and management of …
Based on the investigation of the comprehensive utilization technology of tunnel slag in expressway, the author finds that combining with the characteristics of the project, planning …
Mechanical Properties of Slag-Based Geopolymer Grouting …
Homogenized micro-crack crushing can fully retain the bearing capacity of concrete pavement, but local weak road base needs to be reinforced before being directly overlaid with hot-mixed asphalt. Therefore, indoor tests were conducted to study the mechanical properties of slag-based geopolymer as a grouting material for weak road base, and the morphology and …
Development and Application of Micro Automatic …
In the model test of underground engineering, how to carry out the automatic excavation of different types of tunnel and small caverns is still a technical challenge at present. In this paper, we designed and developed the micro automatic excavation device, including the cutting type automatic excavation device and the crushing type automatic excavation device …
How To Optimize Tunnel Slag Processing With The Right …
In this article, we will explore the characteristics of tunnel slag, the selection of appropriate crushing machinery, and best practices for enhancing processing operations, with a particular …
(PDF) Study on Resourceful Treatment and Carbon
In order to scientifically dispose of metro shield slag and quantify the carbon reduction intensity of its disposal, based on the new shield slag integrated recycling technology, and taking a ...