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Study on Roadheader Cutting Load at Different Properties

Influence of Properties of Coal and Rock on Roadheader Cutting Load Influence of Properties of Coal and Rock on Cutting head and gets the cutting load rule at different properties

Study on Roadheader Cutting Load at Different Properties

Nov 04, 2013 The mechanism of cutting process of roadheader with cutting head was researched, and the influences of properties of coal and rock on cutting load were deeply analyzed.

Research Article Study on Roadheader Cutting Load at

Study on Roadheader Cutting Load at Different Properties of Coal and Rock XueyiLi,BinbingHuang,GuoyingMa,andQingliangZeng uence of properties of coal and rock on roadheader cutting load; the cutting process of cutting head was studied by using dynamic simulation method, and the

Study on Roadheader Cutting Load at Different Properties

Nov 04, 2013 4. Influence of Properties of Coal and Rock on Roadheader Cutting Load. It can be seen that the properties of coal and rock have an effect on cutting load of both cutting pick and cutting head according to coal and rock breaking mechanism and calculation formula of cutting head.

Study on Roadheader Cutting Load at Different Properties

Nov 04, 2013 4. Influence of Properties of Coal and Rock on Roadheader Cutting Load. It can be seen that the properties of coal and rock have an effect on cutting load of both cutting pick and cutting head according to coal and rock breaking mechanism and calculation formula of cutting head.

Study on Roadheader Cutting Load at Different Properties

The mechanism of cutting process of roadheader with cutting head was researched, and the influences of properties of coal and rock on cutting load were deeply analyzed. Aimed at the defects of traditional calculation method of cutting load on fully expressing the complex cutting process of cutting head, the method of finite element simulation

Study on Roadheader Cutting Load at Different Properties

Related papers. Page number / 9 9

Study on Roadheader Cutting Load at Different Properties

Study on Roadheader Cutting Load at Different Properties

Roadheader A comprehensive review ScienceDirect

Jan 01, 2020 The roadheader can cut fractured or closely jointed rocks of up to 160 MPa of UCS that has a bearing on the consistent development of roadheader machine power and weight (Pandey et al., 2017). Bilgin et al. (1997) investigated the geological factors, construction method and the physical and mechanical properties of rock formations on two

CUTTING PERFORMANCE ASSESSMENT OF A MEDIUM

cutting tests. Some rock properties such as uniaxial compressive strength, tensile strength, Cone Indenter hardness, Shore hardness, Schmidt hammer rebound hardness and laboratory cutting specific energies are determined by laboratory tests for the rock and coal types encountered in the drivage of roadways. The relations

Print), ISSN (Online) DOI: OPTIMIZATION DESIGN FOR

power in the process of coal and rock cutting [1]. There are various factors influencing the performance of roadheader cutting head during the cutting process, which mainly include the structural parameters itself, the kinematics parameters of the machine, the physical and mechanical properties of coal and rock

Prediction of roadheaders' performance using artificial

Oct 01, 2015 (4) Stage of coal or rock breaking. With the further interaction of cutting picks and coal or rock, more rock powder becomes nucleus, and nucleus grows up; when the pressure exceeds a certain value, the coal or rock breaks, cutting load on picks decreases instantly, and a leapfrog cutting cycle is completed .

Roadheader solutions in focus TunnelTalk

The universal shield-mounted boom can be fitted with different cutting tools from a shovel, a ripper tooth or a hydraulic jackhammer, and a roadheader boom can be fitted for when rock of 80 MPa or more is encountered. The excavated material is transported by belt or chain conveyors to the conveying system located at the rear of the operation.

Estimation of optimum specific energy based on rock

based on rock properties for assessment of roadheader performance by C. Balci*, M.A. Demircin†, H. Copur*, and H. Tuncdemir* Synopsis Specific energy is defined as the amount of work required to break a unit volume of rock and is used to predict the performance of mechanical miners. It is obtained from full-scale rock cutting

Multifactor Analysis of Roadheader’s Body Pose Responses

The complex and changeable cutting head load, different dip angles of coal seam, and constantly changing horizontal swing angle of cutting arm cause constant change of roadheader’s body pose during the horizontal cutting process, which seriously influences the positioning and orienting excavation of the roadheader and leads to reduction in

Influence of Motion Parameters on Cutting Performance of

Sep 28, 2020 The cutting performance of the boom-type roadheader impacts the energy consumption and efficiency of coal mine roadway excavation. The purpose of this work is to investigate the influence of motion parameters on cutting performance. The motion of the cutting head during swing cutting was simplified to establish a numerical model. Rock samples were arranged to perform the swing cutting

EFFECTS OF SPIRAL LINE FOR PICK ARRANGEMENT ON

roadheader cutting heads. (Received, processed and accepted by the Chinese Representative Office.) Key Words: Cutting Head, Pick Arrangement, Spiral Line, Cutting Head Design, Cutting Load, Boom Type Roadheader 1. INTRODUCTION The cutting head is an important part of a roadheader and the design of it is one of the most

(PPT) CONTINUOUS MINER AND ROADHEADER Jatangi Anil

ROADHEADER INTRODUCTION A roadheader, is a piece of excavating equipment consisting of a boom-mounted cutting head, a loading device usually involving a conveyor, and a crawler travelling track to move the entire machine forward into the rock face. The cutting head can be a general purpose rotating drum mounted in line or perpendicular to the

Study on Roadheader Cutting Load at Different Properties

The mechanism of cutting process of roadheader with cutting head was researched, and the influences of properties of coal and rock on cutting load were deeply analyzed. Aimed at the defects of traditional calculation method of cutting load on fully expressing the complex cutting process of cutting head, the method of finite element simulation

CUTTING PERFORMANCE ASSESSMENT OF A MEDIUM

cutting tests. Some rock properties such as uniaxial compressive strength, tensile strength, Cone Indenter hardness, Shore hardness, Schmidt hammer rebound hardness and laboratory cutting specific energies are determined by laboratory tests for the rock and coal types encountered in the drivage of roadways. The relations

Print), ISSN (Online) DOI: OPTIMIZATION DESIGN FOR

power in the process of coal and rock cutting [1]. There are various factors influencing the performance of roadheader cutting head during the cutting process, which mainly include the structural parameters itself, the kinematics parameters of the machine, the physical and mechanical properties of coal and rock

Prediction of roadheaders' performance using artificial

Oct 01, 2015 (4) Stage of coal or rock breaking. With the further interaction of cutting picks and coal or rock, more rock powder becomes nucleus, and nucleus grows up; when the pressure exceeds a certain value, the coal or rock breaks, cutting load on picks decreases instantly, and a leapfrog cutting cycle is completed .

Estimation of optimum specific energy based on rock

based on rock properties for assessment of roadheader performance by C. Balci*, M.A. Demircin†, H. Copur*, and H. Tuncdemir* Synopsis Specific energy is defined as the amount of work required to break a unit volume of rock and is used to predict the performance of mechanical miners. It is obtained from full-scale rock cutting

Modelling and response analysis of multibody large-scale

Apr 19, 2021 Study on roadheader cutting load at different properties of coal and rock. M. Simulation of control strategy for swing speed of roadheader’s cutting arm based on GA-BP network. J China Coal Soc 2020. DOI: 10.13225/jki.jccs.2020.1022. Google Scholar. 28. Yang, YY, Jin, DW. Machinery system dynamics.

(PPT) CONTINUOUS MINER AND ROADHEADER Jatangi Anil

ROADHEADER INTRODUCTION A roadheader, is a piece of excavating equipment consisting of a boom-mounted cutting head, a loading device usually involving a conveyor, and a crawler travelling track to move the entire machine forward into the rock face. The cutting head can be a general purpose rotating drum mounted in line or perpendicular to the

TON MR300 SERIES ROADHEADER TON Mining

TON roadheaders are extremely powerful rock-cutting machines designed to excavate roadways, tunnels and chambers continuously without using explosives. They are equipped with powerful, geometrically optimized, transverse cutter heads proven to give the best cutting performance in a wide range of rock formations.

Experimental and numerical investigation of roadheader for

The purpose of this study is to investigate the dynamic characteristics of a roadheader for breaking rocks containing different numbers and sizes of predrill holes. A series of experiments was performed to quantitatively measure the cutting torque, thrust force, and specific energy during the cutting of a

Estimation of Rock Cuttability from Shore Hardness and

Oct 17, 2006 Shore hardness has been used to estimate some mechanical and physical properties of rocks for many years. This study differs from previous studies in a way that it is directly oriented to rock cuttability. Two Shore hardness values (SH 1 andSH 2) and a coefficient of deformation value (K) have been measured for 30 different rock samples.

Experimental and numerical investigation of roadheader for

The purpose of this study is to investigate the dynamic characteristics of a roadheader for breaking rocks containing different numbers and sizes of predrill holes. A series of experiments was performed to quantitatively measure the cutting torque, thrust force, and specific energy during the cutting of a cutterhead. Experimental results

(PDF) Evaluation of Conventional Drill and Blast and Using

The Karoo has sandstone layers which can have rock strength up to 100 MPa and the performance of the roadheader in the sandstone can be estimated through equation 12 : The mechanical tools used by the roadheader to cut the different rock types are called picks.The cutter head consists of such picks which cut at a rate of 2.3m/s.

Determination of the Influence of Microwaves to the Hard

Figure 1 3: Instantaneous cutting rate versus RQD (after Bilgin et. al 1996) Geotechnical system RMR was developed by Bieniawski, 1973 for estimation load, rock condition and tunnel support. Recently, classification of RMR has been applied to excavation coal and hard rock

definition of coal roadheader

Study on Roadheader Cutting Load at Different Properties. Nov 04, 2013 Roadheader cutting head load has an important influence on the machine's performance, as the object of cutting and coal and rock characteristics have a significant impact on the cutting load.