The manufacturer's service attitude is good and the design plan is more reasonable.
WhatsApp +
Extremely reliable coarse crushing equipment
Reliable quality and long service life
Mobile crusher is a more complete, systematic and flexible modular solution that we offer to our customers.
A new generation of high-efficiency coarse and medium-fine crushers: CI5X series impact crushers
·Shallow coal seam with thick soil layer is widely reserved in the Jurassic Coalfield Western China mining induced subsidence represents complex characteristics Combining with physical
The paper points out that bord and pillar mining is the most important method of coal extraction in South Af ican underground coal mines and advocates that pillar design procedures should be refined to make more rational allowance for the differences in strength properties between various coal seams and roof and floor strata However any deviations from well established design
·Design map of coal mine drainage system based on water catchment areas rainfall data runoff discharge and information on rain intensity/frequency 5 Conclusion and suggestion
·The results are of great significance to coal seam mine design the prediction of the stiffness of weak parts and optimization of the support structure 1 2 Zhou et al 3 used the ZY12000/28/64 roof cover hydraulic supports as primary reference objects and constructed a kinetic equation by applying the Lagrange equations of the second kind
·The systematic planning and design process for underground coal mining operations from inception to closure 1 PHASE 1 INVESTIGATIVE STUDIES Market analysis The mine planning and design process for any new coal mining operation commences with the identification and analysis of specific market needs and requirements These needs and
·The hydraulic cover support and walking structure are the main parts of cover robot for coal mining Through the analysis of moving path of four connecting rods which simplified from cover support of cover robot and the pressures from falling down of coals and rocks the new cover support structure is designed
·Rock and soil strength profoundly influences the stability of open pit mine slopes Traditional slope design based on limited drilling data often disregards inherent uncertainties Effectively
·In the daily drilling construction of crawler full hydraulic tunnel drilling rig in coal mine it is necessary to stabilize the feed body to ensure that the drilling rig can still maintain a stable working state under the working environment of large torque of rotary device [] Otherwise it may cause the movement of the body displacement and dropping of drilling tools in the hole
·The belt conveyor is a key piece of equipment for thermal power plants Belt mistracking causes higher economic costs lower production efficiency and more safety accidents The existing belt correction devices suffer from poor performance and high costs Therefore a design method for coal conveying belt correction devices is proposed in this
·About 80% of total mining in India is carried out in coal sector through open cast mines where heavy dumpers are plying on the haul roads Mine haul roads have witnessed an enormous increase in traffic density as well as hauling payloads in the recent past due to increase in coal mining activities In the Indian scenario the majority of these large open cast mines are
·Coal Mine e coal sample selected in this article is from Chicheng village Xinyao town Chongxin county Pingliang Gansu province China e geographical location is shown in Fig 2 Coal samples
Design of underground coal mining methods for different geomining conditions depth thickness discontinuities inclination etc of coal seams Better understanding of Indian geo mining conditions and rock mass characterisation RMR for an efficient design of support and underground mining structures based on geotechnical investigations
·the progressive fall in yearly coal production in recent years Multiple reasons contribute to the decrease in mining eciency of classic cutting methods in dicult conditions The mining eciency helps the miners to provide the same amount of output by using minimum input Meanwhile in the mining site the mining efficiency improves the eciency
·In this paper the characteristics of all kinds of robots are analyzed and compared the moving mechanism of selected robots is determined different obstacle movements are analyzed in different working environments of coal mine robots and then the dynamic system of coal detecting robots Finally using solid works software simulation analysis
·With the development of mine hoisting system towards large scale higher requirements are put on the structural design of the large headframe [4 5] In the process of traditional design the
·Structural design can improve the performances of a vascular stent in terms of promoting therapeutics stability mechanical properties as well as alleviating side effects For instance various stents should compromise the selection of materials due to specific applications As a result the mechanical properties and stabilities might be
·The structure model of overlying strata in mining fields can be used to describe strata movement and predict mine disasters [1 2 3]; it is the foundation of safe mining in underground coal overburden structure theories and hypotheses proposed for mine pressure and rock strata control mainly include key strata theory [4 5 6] transfer rock beam
·To clarify the coal structure spatial distribution and controlling factors of the 2# coal seam in Jiaozuo mining the drilling coal samples were collected to observe the coal type and coal structure The coal macerals were identified by a MPVSP microscope photometer and the spatial characteristics of the coal structure were obtained through interpreting deep lateral
·1 Introduction The development of the concepts of Smart Grids Smart Cities and Smart Manufacturing plays a significant role in improving the usage efficiency of primary resources and contributes to the reduction of emissions into the environment [1] Meanwhile coal and the development of coal mining technologies play a significant role in ensuring the
·Seals and build in place BIP refuge alternatives RAs are two main underground structures to isolate an area from the active working zones with different purposes While seals are used to prevent methane gas that seeps from coal seams and blast pressures from a possible detonation of the contained gas RAs are used to provide a safe haven for
·In mining however it extracts raw materials from a specific location where it occurs in the earth crust It follows that mining such as coal mining is to carve out a specially designed structure in the earth crust where miners can travel to reach it and extract the desired minerals safely with high efficiency
·This article addresses the issue of energy waste resulting from frequent braking of underground mine cars and proposes an optimization design to address this The proposed solution involves the installation of a regenerative braking device within the mine cars to capture and reuse the energy wasted during braking This implementation improves the endurance
·All industrial agricultural transport energy hydro technical and other structures residential and public buildings water bodies watercourses healing springs and mud natural historical
Design of Coal Mine Intelligent Monitoring System based on ZigBee Wireless Sensor Network Gao Dan1 a Li Weiwei1 b and Dai Kun1 c 1Department of Automation Engineering Tangshan Polytechnic College Tangshan 063200 China a495403374 b491321914 c395745402 Keywords ZigBee Intelligent control Monitor Abstract This paper
