Section design of shaft and roadway of slag raking

Section design of modern roadway slag raking machine (shaft and roadway)

section design of modern roadway slag raking machine [shaft and roadway]: first of all, on the premise of safety and use, strive to improve the utilization rate of section, reduce the section, reduce the cost and facilitate construction

determine the section shape and size according to the roadway use, surrounding rock conditions, mechanized configuration [the nature of rock strata, the size and direction of ground pressure, support materials and support methods, tunneling methods and the corresponding safety clearance of the equipment used]

check the net section with wind speed, and select support parameters and ballast bed parameters

determination of ditch parameters and layout of pipelines

draw sectional construction drawings, and prepare roadway characteristics, quantities per meter of roadway and material consumption tables

determination of the net width of the roadway [roadway]: the net width of the roadway [roadway] refers to the horizontal distance between the terminals of the exposed length of the inner walls or bolts on both sides or the most prominent terminals of the rock. The net width of trapezoidal roadway is calculated from the middle. It shall be determined according to the size of equipment excavation and transportation, mainly by rail transportation, trackless transportation, and the equipment width of tire or crawler rock drilling jumbo, cantilever roadheader, shuttle mine car, side dump mine car, mining truck, slag raking machine [excavation loader] and the corresponding safety clearance of sidewalk

determination of the net height of the roadway [roadway]: the net height of the roadway [roadway] is the horizontal height from the ballast surface or floor to the top or the longest terminal exposed by the bolt. Similarly, it should be determined according to the size of equipment excavation and transportation, mainly by rail transportation, trackless transportation, and the equipment width of tire or crawler rock drilling jumbo, cantilever roadheader, shuttle mine car, side dump mine car, mining truck, slag raking machine [excavation loader] and the corresponding safety clearance of sidewalk

determination principle of shaft and roadway section shape and size:

the shape of shaft and roadway section is mainly determined by 1. It is necessary to confirm that the power supply is the nature of surrounding rock in the disconnected state, the service life of shaft and roadway, mining equipment and support materials

principles for determining the shape and size of shaft section:

the shape of shaft section is generally circular, and the shaft section excavated in the early stage adopts rectangle and ellipse (which are rarely used at present); Inclined shaft section has arch, trapezoid, etc

roadway section shape and selection principle: after the foundation is dry,

the roadway section shapes used in coal mines in China include rectangle, trapezoid, multi film blowing machine, development of high-end science and technology, angle, arch, circle, horseshoe, oval, etc

the principle of selecting the roadway section shape: the magnitude and direction of the ground pressure of the roadway surrounding rock, that is, the nature of the surrounding rock through which the roadway passes; Use and service life of the roadway; Materials and support methods selected for the roadway; The tunneling mode of the roadway and the burial condition of the rock stratum

determination principle of roadway size:

the smaller the roadway section is, the better the stability is. Finally, the reasonable section size should take into account the construction technology, the purpose of the roadway and the utilization rate of the section. The net section of the roadway in the coal mine should meet the needs of pedestrians, transportation, ventilation, equipment construction, installation and maintenance. To design the section size of the roadway, the net section size of the roadway should be determined first, and the wind speed and optimization should be checked. Finally, according to the support parameters and track bed parameters, the design tunneling section size of the roadway is calculated, and the calculated tunneling section size of the roadway is calculated according to the allowable increase value (override value). For soft rock roadway, deep topsoil and shaft affected by mining, its section shape and size should be determined by special research. (end)