Vol 106

A number of mines and mines have a service for monitoring the seismic condition of the mine field. Seismographs continuously record seismic signals from different areas of the mine or mine, characterizing the stress state of the rock mass.

Drilling-type combine (PK-8M, Ural-10KC, Ural-20KS) can be represented by a kinematic scheme. On the caterpillar track about the support surface AB is placed a cantilever, with which the main actuator forming the roof and walls of the excavation and berm cutters, carrying out soil treatment, are rigidly connected.

The operation of the sensor is based on the use of natural gamma radiation of the potassium bed, due to the presence in natural potassium of a small amount of weakly radioactive isotope 40/19 K.

Energy consumption for drying of concentrates at concentrators is at least 10-15% of all energy costs of mining enterprises, so it is very important to optimally control this process to minimize energy consumption.

The preparation of a mixture of several material components is included in many technological processes. The problem of minimizing the maximum error of the relative proportion of components arising due to proportioner errors was considered in the work.

The period of continuous operation of a vacuum filter between filter fabric change operations depends on the condition of the filter baffle. In this case, the average performance of the vacuum filter decreases nonlinearly with the increase in the duration of the filter fabric operation.

The sprung part of the dump truck BelAZ-549 is supported on the front and rear wheels through pneumatic springs (suspension cylinders).

Increasing the accuracy of measuring the mass of cargo in the body of a stationary dump truck is possible by reducing the error of constructive nature due to the forces of dry friction of the contacting surfaces of the suspension cylinders.

When measuring moisture content by the thermovacuum method, the temperature change of the sample is determined in the process of moisture desorption in vacuum. In the case of low humidity less than 2-3 %, the dependence of the maximum value of the sample temperature change is expressed by the regression equation.

Thermovacuum method of moisture measurement is based on the following: if a thin, uniform in thickness layer of material is placed in a sealed volume and vacuumized, then due to the intense absorption of energy during the phase transition of water to the vapor state, the temperature of the material will begin to fall.

One of the quality indicators of the produced mining and chemical raw materials and processed products is their moisture content. Reliable control of humidity requires a lot of labor and time.

To control the moisture content of bulk products of the mining and chemical industry it is preferable to use infrared and high-frequency methods, providing maximum sensitivity of the output parameter of the measuring instrument from the moisture content of the material.

In high-frequency moisture meters with capacitive sensor it is necessary to minimize the influence of variable active losses of the controlled material on the measurement results.

The difference and variability of electrophysical properties of solid materials, such as coal, require the development of individual electrical means of controlling moisture and other indicators of their quality.

Collector - the main functional unit of a cluster of degassing wells - belongs to the category of control objects, in which the energy process is carried out in the form of heat and mass transfer. Structurally, the collector is made in the form of a section of the gas pipeline, in which the mixing of gas flows coming through the well trunklines takes place.

To ensure the safety of train traffic, signaling systems based on the use of traffic light signaling are now widely used. At occurrence of emergency situations the train on signals of a traffic light is stopped by the driver.

One of the ways to improve mine electric locomotive transport is its automation. The effectiveness of automation is determined by increasing the reliability of electromechanical equipment, creating the conditions of accident-free, non-stop movement of trains and transport operation in the mode of averaging quality indicators of rock mass.

AC drives, due to their well-known advantages, in many industrial mechanisms successfully replace DC drives. Particularly effective is the use of a valve motor, which by its control properties is almost a complete analog of the DC machine and, in addition, has an undoubted advantage - the absence of a collector unit.