Method of development of powerful steeply inclined coal bed in stripes downwards
SUBSTANCE: method of development comprises preparing of the extraction column carrying out conveyor and ventilation drifts, preparing of winning band by performing off end and near slopes along the downwards line at the soil of layer from the conveyor to the ventilation drift on both sides of the band, performing the mounting chamber at the ventilation drift, mounting of sections of aggregated timber in it, coal extraction with low-inclined layers by the shearer of front action and transportation of coal along the bottom hole of self-propelled car to off end slope , in inclination of the extracted layer towards the near slope, or to the near coal chute slope, in inclination of the extracted layer towards the off end slope, change in the direction of inclination of the layer and turn of the combine in the chamber, which is carried out outside of the winning band. And the self-propelled car is equipped with an automated control system. At that from the overlap of each section of the aggregated timber towards the soil layer a signal is given, corresponding to the order number of the timber section, this signal is received by the receiving device mounted on the self-propelled car, and is transmitted to the automated control system. After changing the direction of inclination of the layer setting up of the control system of the self-propelled car is carried out, which, depending on the combination of numbers of the received signals and the degree of loading the body, ensures actuation of actuators of the self-propelled car - movement back and forth, drive-brake, loading-unloading, stop.
EFFECT: increased efficiency and safety of the development of powerful steeply inclined layers due to organisation of the automated control system of the self-propelled car for transporting loosened coal.
The present invention relates to mining, in particular to the development of powerful steeply inclined coal seams in flat layers to shield the development system.
There is a method of developing a powerful steeply inclined coal seam stripes on the decline, including the preparation of the mining of the pillar holding conveyor and ventilation drifts, the preparation of the mining strip holding the flank and the middle rays along the line of fall of the soil layer from the conveyor to the ventilation drift on both sides of the strip, for mounting the camera in the ventilation drift, installation of partitions coupled to the support, mechanized excavation of coal and forced transport of coal along the stope . The disadvantage of analogue is that the forced transport of coal along the stope screw carried out by the Executive bodies of packaged shields are installed along the stope, sequentially from one to another. However, the performance stope cannot be higher than the performance of one screw Executive body for the transportation of extracted coal, which reduces the efficiency of the development of a coal seam.
As the prototype accepted way to develop powerful steeply inclined coal seam stripes-dip switch is in store preparation, excavation and post-holding conveyor and ventilation drifts, the preparation of the mining strip holding the flank and the middle rays along the line of fall of the soil layer from the conveyor to the ventilation drift on both sides of the strip, for mounting the camera in the ventilation drift, installation of partitions coupled to the support, the notch coal flat layers clearing harvester front steps, forced transport of coal along the face of a self-propelled carriage on the flank slope, if the slope of the removable layer in the middle of the slope, or the middle opesuse scat, when the slope of the removable layer in the direction of the flank of the slope, changing the direction of the bias layer and the reversal of the harvester in the chamber, which is held outside the excavation of the strip . The disadvantage of the prototype is that when developing a powerful reservoir outcrop of the coal of the array at a height considerably greater than the height of the self-propelled carriage, and the array as a failover layers along the line of fall of the reservoir, has a tendency to hover over the ground of the developed layer. The control cab self-propelled carriage is in the front right of the longitudinal axis of the car. During transportation of extracted coal along the stope to reduce the likelihood of injuries to the driver of the self-propelled carriage, he must be from the shields, and not from the coal of the array, in order to avoid to be trauma is ofanim pulled from the array chunks of coal. But then, after turning the car, its cabin is behind the driver will not be visible trajectory that by itself is not effective and dangerous. This drawback reduces the effectiveness and safety of the development of powerful steeply inclined coal seam stripes on the decline.
The aim of the invention is to improve the efficiency and security developments powerful steeply inclined coal seam stripes on the decline due to partial withdrawal of people from the zone of doing cleaning work and organization of the automated control system of a self-propelled carriage.
This objective is achieved in that in the method of developing a powerful steeply inclined coal seam stripes on the decline, including the preparation of the mining of the pillar holding conveyor and ventilation drifts, the preparation of the mining strip holding the flank and the middle rays along the line of fall of the soil layer from the conveyor to the ventilation drift on both sides of the strip, for mounting the camera in the ventilation drift, installation of partitions coupled to the support, the notch coal flat layers clearing harvester front steps, forced transport of coal along the face of a self-propelled carriage on the flank slope, with the slope of the removable layer in the middle of the slope, or the middle opesuse scat, when the slope is animemanga layer in the direction of the flank of the slope, changing the direction of the layer tilt and turn combine in camera, which is held outside the excavation zone, in accordance with the technical solution, the transport of coal along the stope carry out a self-propelled carriage with an automated control system, with overlap each section is coupled to a support in the direction of the soil layer signal corresponding to the ordinal number of the shields, this signal is received by the receiving device mounted on a moving carriage, and passed into the automated control system, after changing the direction of inclination of the layer carry out the adjustment of the control system self-propelled carriage, which, depending on combinations of numbers of the received signals and the degree of loading of the body enables the Executive mechanisms of self - propelled car back and forth motion, acceleration-deceleration, loading-unloading, stop.
The essence of the proposed method is illustrated by drawings.
1 shows a diagram of the preparation and mining of a band falling flat layers; figure 2 - scheme of arrangement of equipment and devices in mounting the camera (view); figure 3 - the same, but in a mining face in the middle of the floor height.
The method can be implemented as follows.
Long extraction column prepared by carrying out the envelopes the cluster 1 and vent 2 drifts. Excavation strip framing holding the far border post (on the flank) uglespusknoj slope 3 in soil formation and in the near-border - uglespusknoj Stingray 4 in a similar way. The ventilation drift 2 construct the mounting chamber 5 in which is mounted the partition panel is coupled to a lining 6 stope powerful steeply inclined strata.
From the side of the working space on the downhole edge of the rotary fencing shield symmetrically to its longitudinal axis has two emitter 7 and 8 are configured on different frequency, different for each of the shields directed towards the soil working layer.
In the workspace stope mount Shearer 9 front steps with a cutting Executive body, made in the form of horizontally oriented drum, for example of the type of JOY 17CM, and self-propelled carriage 10, for example VC. On loading the boom of the Shearer 9 set the emitter 11 directed towards the soil layer, and over the cab self-propelled carriage 10 mounted device receiving signals from the emitters of shields, of the Shearer and the end of the emitter 12 that is installed on the border uglespusknoj the pitch with a working layer. Self-propelled carriage 10 can operate in manual control mode, i.e. under the control of the operator, and AVT is automated.
In the initial position of the section 6 is installed in-line, retractable canopies extended until it touches the roof of the reservoir. Emitters are turned on and the signals, limiting the operating area of the self-propelled carriage. While the emitters 7 and 8, each of the shields together to form a possible trajectory of the car, which at the initial stage is horizontal (see figure 1) and rectilinear in plan (see figure 2), the emitter 11 indicates the area of loading the broken coal in the car, and the radiator 12 to the unloading area of the car.
When the notch in the soil mounting chamber Shearer forms Shearer road, which is about one and a half times wider roads necessary to pass the self-propelled carriage. While the straightness of the soil layer (as in profile and plan) is violated, and the possible trajectory of the car, indicated by the emitters 7 and 8 of each section before advancing shields, remains straight. Due to the greater width of the harvester self-propelled road carriage moves on Shearer road, but in accordance with a possible trajectory indicated by the radiators 7, 8.
After loading the car repulsed by coal, the control system sends a signal to the driver of the Shearer about filling out the car body and, after stopping the operation of the harvester, signal the beginning of the movement towards uglespusknoj of the slope. The movement in the rut occurs in accordance with the trajectory, indicated by the radiators 7, 8 preset speed.
The border strip mining with prespectrum slope management system car picks up the signal from the end of the emitter 12 and sends a signal "stop", and after a stop - signal "unloading". The car performs unloading his body towards uglespusknoj of the slope.
At the end of the discharge control system sends a signal of the movement of the carriage to Oistamo the harvester. The carriage moves along the path indicated by the emitters 8, 7 in the opposite direction until such time as the control system does not receive a signal from the transducer 11, is installed on the harvester, to signal "stop" and its transfer to the operator of the combine to indicate that the readiness of the car to load repulsed by coal.
After shifting part of the shields, the possible trajectory of the car, indicated by the radiators 7, 8, will receive a small curvature, both in a horizontal and in a vertical plane. This is due to the angle of occurrence are working layer. As testing of further layers of the area of curvature of the trajectory of the self-propelled carriage will move in the direction uglespusknoj of the slope, on the pairing unloaded the car. However, regardless of the location of the zone of curvature of the trajectory, the car is described by the program until, when the and will need to change opesuse the slope.
To change uglespusknoj slope, perform camera reversal, as described in the prototype , unfold it shearers and change it in some places with a self-propelled carriage. The self-propelled carriage is carried out in manual mode, i.e. the car is controlled by the driver. Then the harvester and wagon driven by Shearer road to uglespusknoj the slope on the opposite side of strip mining.
During the execution of works on carrying out the camera turn carry out the adjustment of the control system of a self-propelled carriage and move the emitter terminal 12 to mate with the opposite prespectrum slope.
Further work equipment for the extraction of coal in flat layers is the same, but now in the zone of curvature of the projection of the trajectory of movement of the carriage on the vertical plane will have a change of angle from positive to negative, i.e. the first carriage will move up, and after curving downward; the same applies to the projection of the trajectory on the horizontal plane (see figure 1 and figure 3). Moving in accordance with the trajectory indicated by the emitters 7 and 8, the carriage will always be within the width of the "harvester road"that will eliminate occasional trips outside the possible trajectories, i.e. will reduce the likelihood of wosn is knowone emergency situations, associated with the human factor.
However, if a delay in shifting any shields, possible trajectory indicated by the emitters 7 and 8 shields, will fail because the emitted signal with the "late" sections will not be in the receiving device of the control system of a self-propelled carriage. In this case, the control system sends a signal "stop", informing, for example, the operator of the harvester on an emergency stop of the self-propelled carriage associated with the discontinuity of possible trajectories, and the location of the car in the layer. After restoring the continuity of the possible paths of movement of the carriage equipment resume.
Organization of work of the self-propelled carriage with an automated control system showed the following features of the way that distinguishes him from the prototype and analogues:
- due to the work of self-propelled car in automatic control mode no longer required reversal of the self-propelled car when you change the direction of transportation of rock mass;
- eliminated the need for a permanent role of operator self-propelled carriage during transport of the rock mass along the stope;
- decreased the probability of an accident during transport of the rock mass, as it reduced the influence of the human factor.
The listed features is vidualistic about improving efficiency and security developments powerful steeply inclined coal seam stripes-dip i.e. what are the goals of the invention.
Sources of information
1. How to develop powerful steeply inclined coal seam stripes on the decline. RF patent №2360115, publ. 27.06.2009, bull. No. 18 (analog).
2. How to develop powerful steeply inclined coal seam stripes on the decline. RF patent №2461713, publ. 20.09.2011, bull. No. 26 (prototype).
How to develop powerful steeply inclined coal seam stripes on the decline, including the preparation of the mining of the pillar holding conveyor and ventilation drifts, the preparation of the mining strip holding the flank and the middle rays along the line of fall of the soil layer from the conveyor to the ventilation drift on both sides of the strip, for mounting the camera in the ventilation drift, installation of partitions coupled to the support, the notch coal flat layers clearing harvester front steps, forced transport of coal along the face of a self-propelled carriage on the flank slope, with the slope of the removable layer in the middle of the slope, or the middle opesuse the slope, with the slope of the removable layer in the direction of the flank pitch, changing the direction of the layer tilt and turn combine in camera, which is held outside the excavation of the strip, characterized in that the transport of coal along the stope carry out a self-propelled carriage with automatiser the private control system, with overlap each section is coupled to a support in the direction of the soil layer signal corresponding to the ordinal number of the shields, this signal is received by the receiving device mounted on a moving carriage, and passed into the automated control system, after changing the direction of inclination of the layer carry out the adjustment of the control system self-propelled carriage, which, depending on combinations of numbers of the received signals and the degree of loading of the body enables the Executive mechanisms of self - propelled car back and forth motion, acceleration-deceleration, loading-unloading, stop.
SUBSTANCE: method of comprehensive development of brown coal deposits comprises dividing the deposits into blocks, drilling drainage wells and underground coal gasification, dissolution of ash and slag residues of coal and pumping of productive solution to the surface for subsequent extraction of valuable components, filling the goaf of the block with the filling material. Six rows of vertical wells are drilled, located in a block with the distance of 20-25 m from one another, which are sequentially used as drainage, productive for the gasification of coal, for dissolution and extraction of ash and slag residuals of coal, and for injection of filling mixture. In each row 10-12 vertical wells are located at a distance of 15-20 m from one another. Underground water is pumped and directed through the unit of water treatment to consumer. Underground coal gasification gas is purified from impurities in the unit of energy gas purification and burned in a local gas electric station. The resultant carbon dioxide is injected in the filling mass via the storage unit and the productive solution is purified from the solid impurities and pumped through a pipeline to a chemical-technological unit connected with the filling complex by the unit of unutilised wastes.
EFFECT: effective comprehensive use of brown coal deposits and comprehensive protection of the environment from the production process impact.
1 dwg, 2 tbl
SUBSTANCE: method comprises advance extraction of underlying protective coal beds. Beds are divided into gateways to be prepared by dual development drifts with coal pillars left there between. Gateway is extracted by longwall with top rocks fall in worked-out area. It includes recovery of one preparatory gateway behind the longwall and supporting of second preparatory gateway behind the longwall for its reuse at extraction of adjacent gateway. At extraction of adjacent beds at mine field sections complicated by disjunctive geological disturbances orientation of said disturbances in space is defined. Dual development drifts extend in foot wall of said disturbance parallel with intersection of protective bed with the surface of disturbance shifter. Boundary of gateway and preparatory drift recovered behind the longwall is located in the line of intersection between protective bad and shifter of disjunctive geological disturbance.
EFFECT: higher efficiency of protected layer degassing, lower costs, higher efficiency of second working.
SUBSTANCE: proposed method comprises preparation of mine field by poles on Longwall Retreating on the Strike development system using the mechanised breaking complexes (MBC). Exposing diagonal workings with inclination angles is performed within the specs of minerals conveyors. Coal is excavated in long breaking coal face with reverse stroke with production of mounting chamber, dismantling chamber, complex and inspection at reassembly and wok site. Rock pressure is controlled by rock cover ball in worked-out area. Mine waters are collected at lower points of the mine. Water solution of antipyrogenes is fed in worked-out area. Long walls are developed at mining face line aligned with MBC, mounting chamber, dismantling chamber, and inspection chamber parallel with opening at both forward and back direction of mining face.
EFFECT: higher yield of commercial coal and efficiency of MBC use.
4 cl, 6 dwg
SUBSTANCE: method of layer mining of a high steeply inclined coal seam with extraction of a bedding pack includes preparation of an extraction pillar by arrangement of conveyor and ventilation drifts, preparation of an extraction strip by performance of coal discharge and ventilation mines from the conveyor to the ventilation drifts, withdrawal of the mounting chamber at the coupling of the extraction strip with the ventilation drift with separation of the bed by capacity into two inclined layers, leaving the bedding pack intact. In the mounting chamber on the soil of each layer they mount sections of the support, and on the soil of the layer near the bed roof - a flexible slab in the form of a net, which covers the bedding pack and the section of the support installed on the soil of the bed. Stripping equipment is represented by sections of aggregated support with an actuator. At the same time the actuator is made in the form of a horizontally aligned drum with teeth. At the goaf side each section is equipped with an additional cutting element for cutting of a weakening slot. Extraction and transportation of the broken coal along the line of the working face is carried out in inclined layers near the roof and the bed soil with auger actuators of aggregated sections of the support. The bedding pack is divided into sections as the working face of the layer is shifted near the bed soil by cutting of weakening slots above each section of the support, is damaged by pressure of collapsed rocks behind the slab and released into the working space of the layer near bed soil in the space between the stands of the support sections. Stands of the support sections are installed on the soil of the bed.
EFFECT: higher efficiency and safety of mining of high steeply inclined coal beds due to using facilities of mechanisation of stripping works of middle seams and organisation of extraction of the coal of a bedding pack at the goaf side of the support into the working space of the layer near the bed soil.
SUBSTANCE: method includes extraction of coal in a long working face by retraction, ventilation of the working face, control of mining pressure by damage of roof rocks in the mined space, collection of minefields in the lower points of the mine and supply of aqueous solution of antipyrogene into the mined space. Extraction pillars are mined in turns with reverse and forward strokes. In advance they erect a dismantling technical inspection and installation chambers coaxially. The longwall mechanised equipment set - LMES - is driven into the dismantling chamber without a thrust at the chamber roof. The elements of the set are moved in blocks by three from the dismantling chamber into the installation one, on the way they do routine maintenance as the blocks move in the technical inspection chamber, at the same time they use movement mechanisms of thrust-sliding-sliding type with autonomous power supply to each block. The mechanism of movement of thrust-sliding-sliding type they use the same sections of the LMES support and their interconnection via movement cylinders with the appropriate chute of the longwall face conveyor. For the period of dismantling they create n autonomous blocks of three with alternate movement of 3 sections of the support without thrust relative to 3 chutes that serve as a stiff beam.
EFFECT: method speeds up installation of LMES into a dismantling chamber, makes it possible without technical facilities of delivery to do the re-installation under its own power from longwall face to longwall face of the LMES in blocks of three, to re-install longwall face of 450 m for 10 days, 300 m for 5-7 days, which will make it possible to increase efficiency of LMES usage.
2 cl, 2 dwg
SUBSTANCE: device comprises a machine with a hydraulic drive of reciprocal and return-rotary displacement, a two-channel tubular frame, a jet working element, a system to supply and distribute discharge liquid. The working element is equipped with the main and auxiliary jet-forming shafts with attachments and separated channels of discharge liquid supply to them. The main shaft is installed at the angle of 90°, and auxiliary shafts - at the angles of accordingly 45° and 3-10° to the longitudinal axis of the working element. Supply of the discharge liquid to channels is adjusted to a two-position distributor installed on the shaft of the hydraulic drive of return-rotary displacement.
EFFECT: simplified design, increased reliability of design, increased safety and efficiency of labour.
4 cl, 3 dwg
SUBSTANCE: method includes detailed research of material constitution of coal beds to detect metals of the platinum group that are subject to associated extraction. Selective mining of coal is performed, at the same time the coal with higher content of osmium is separately supplied to a coal-burning plant, such as a boiler house of the coal burning plant. The osmium-containing coal is burnt in a furnace of a low-temperature boiling layer of a water-heating or steam, boiler with at least double surplus of air supplied for burning, compared to theoretically necessary one, temperature in the volume of the boiling layer is maintained at the level of 800±50°C. Gaseous combustion products are sent into an emulsifier, in which from them they first remove large ash particles, then their contact is provided with a solution of alkali, such as NaOH; products of reaction of smoke gases with the alkali solution are discharged from the emulsifier and sent to recover osmium to metal.
EFFECT: invention makes it possible to increase efficiency of integrated development of steam coal deposits.
SUBSTANCE: first preparatory field mines are driven - level haulage and ventilation drifts with identical geodetic elevations, block crossdrifts and accumulating drifts with an inclination for a self-flow transport, stripping wells are drilled at the right angle to the bed plane, then, line cuts are washed by the hydraulic method. Level haulage and ventilation drifts stretch at identical geodetic elevations to form a ventilation scheme with horizontal depression. The area of line cuts is increased to initiate the process of caving of a hanging massif in a stope. The stope bottom is formed by washing of line cuts with an inclination providing for accumulation of caved coal through self-flow. The caved coal is magazined to control shift of side rocks in the stope. Chambers that are adjacent to the mined space are separated by barrier sight pillars. Oversize material is crushed, and coal mass is periodically discharged in dosing manner into the accumulating drift to provide for stope bottom movement up the pitch.
EFFECT: elimination of air leaks through a mined space, reduced contamination of coal by caved rocks, higher reliability of breaking face functioning and labour safety.
SUBSTANCE: method to mine mineral beds includes separation of a mined area of a mine field into mineral columns, preparation of columns by means of arrangement of area developing entries, working of columns with longwall faces equipped with mechanised complexes and dismantling of mechanised complexes in dismantling chambers after completion of actual mining in the longwall faces. If a distance between the longwall face and the location of the dismantling chamber is more than the width of the zone of high stresses that arise in front of the longwall face bottom, at the border of the mined column in front of the longwall face bottom they drive an auxiliary dismantling mine. The bed is loosened in the area that adjoins the auxiliary dismantling mine at the side of the longwall face, by means of drilling of wells in the bed. Actual mining in the longwall face is continued until the auxiliary dismantling mine is stripped with its bottomhole. At the same time the width of the zone of loosened bed in the area that adjoins the auxiliary dismantling mine at the side of the longwall face is determined from the following expression.
EFFECT: reduced costs related to dismantling of a mechanised complex, reduction of time to perform dismantling works and their increased safety.
SUBSTANCE: method consists in identification of a length of active gas release zones, preparation of extraction pillars by tunnelling and strengthening mines in the rock massif, mining of extraction pillars and removal of methane in degassing wells. At the same time the length of active gas release zones is defined by variation of volume deformations of rock massif. At the same time the values of volume deformations of rock massif are produced by numerical methods on the basis of analysis of components of deformation and stress tensors with account of the time factor. The tensor characteristic is gas permeability of rocks under conditions of their natural occurrence. Medium values of rock massif gas permeability are assessed by the given mathematical expression. After determination of length of active gas release zones, with account of produced data, schemes of well drilling, their diameter and number are selected.
EFFECT: increased efficiency of methane removal, higher load at a working face and increased safety of clearing works by gas factor.
SUBSTANCE: control method of a shield of a tunnel boring complex consists in the fact that the shield is controlled in two planes by means of control systems in vertical and horizontal planes. By means of measurement equipment there determined are inclination angles of an actuating element relative to vertical and horizontal planes, signals as per speed of change of the inclination angle relative to vertical and horizontal planes, linear displacements in vertical and horizontal planes, and speeds of change of linear displacement in vertical and horizontal planes. The above signals are supplied to a control unit as per four coordinates, where they are compared to the task; after that, based on error signals, a relay control law of the actuating element is created. The invention also proposes a tracking control system of the shield of the tunnel boring complex, which includes the following in-series connected components: an optic direction setting device, a beam deviation unit, a membrane, a photoelectric receiving device and a four-coordinate control unit the input of which is connected to an inclination angle measurement unit. In addition, the device includes a state observer unit the input of which is connected to the inclination angle measurement unit and the output of which is connected to the control unit.
EFFECT: improving accurate and reliable control of movement of a shield of a tunnel boring complex.
2 cl, 4 dwg
SUBSTANCE: there proposed is the method of automatic obtaining of specified bottom-hole region in the acting working faces in underground mining of bituminous coal, where by means of tilt sensors mounted on, at least, three out of four main structural details of movable shield framing there defined is the tilting of shield details relatively the horizontal, and calculation machine unit calculates the height of shield framing corresponding to the formation. Besides, there performed is the recording of step movement of each framing of movable shield and there defined is the depth of shearer cut with drum executive mechanism at each winning step. Also by means of sensors mounted on shearer there recorded is the height of shearer cut. By means of bottom-hole area geometry calculated on the basis of the obtained data at each movable shield framing there mounted is the angle of bed top passing and the setting of shearer cut height with drum executive mechanism is sent to the corresponding angle of bed top passing for obtaining the specified bottom-hole region.
EFFECT: automation of mining and fixing works in relation to the specified bottom-hole region.
20 cl, 10 dwg
SUBSTANCE: method for automatic production of specified width of bottomhole space consists in determination of a distance between the upper edge of the drum base and the lower side during mining, accordingly, bringing the rest of the shield support bed top cover. At the same time the specified distance is measured by means of at least one radiolocating sensor fixed on the base of the shearer-loader drums. The actual value for tunnelling height of the shearer-loader with a drum actuator under the shield support is introduced into a unit of a computing machine and compared with the specified value stored in it. At the same time, if a deviation is established, control commands are generated for adaptation of cut height of at least one of two cutting drums of the shearer-loader. Also a device is disclosed for realisation of the proposed method, where radiolocating sensors are arranged at the side of the drum base manhole and may be installed aflush into the surface of the drum base.
EFFECT: exclusion of collision of a shearer-loader working element drum and frame of a shield mechanised support.
21 cl, 5 dwg
SUBSTANCE: tunnelling combine is proposed, comprising a cutting element, hydromotors of a movement mechanism, controlled by a hydraulic distributor, and outriggers kinematically connected to hydraulic cylinders equipped with hydraulic locks and controlled by a separate hydraulic distributor. Besides, the tunnelling combine additionally comprises an "or" valve, one inlet of which is connected to one of manifolds of hydromotors of the movement mechanism, and the other one is connected with their second manifold, and a check valve, the under-valve cavity of which is connected to the outlet of the "or" valve, and the above-valve cavity is connected via the hydraulic locks of hydraulic cylinders with their stem cavities. Besides, in the neutral position of the separate hydraulic distributor of hydraulic cylinders control, their piston cavities are connected with a drain manifold via hydraulic locks.
EFFECT: expansion of capabilities of tunnelling combine control and higher safety.
SUBSTANCE: method is proposed to control cutting height of stripping combine drums, in which they register parameters of drums cutting-in into a side rock, and drum cutting height is set with control signals produced from the measured values. At the same time in process of mining works the measured values, which are registered, include consumption (ISM) of current by cutting motors that drive the drums, and also speed (VM) of stripping combine motion with the drum actuator. From these measured values in a computer they determine the appropriate specific energy (ESP) of cutting as the ratio of current consumption (ISM) to motion speed (VM). Besides, for various conditions of extraction, depending on hardness of coal to be produced and side rock deposited nearby, they set a characteristic value for specific energy (ESP) of cutting, which, when exceeded, results in cutting-in of drums into the side rock, and appropriate control signals are formed for correction of drum cutting height.
EFFECT: higher accuracy of combine drum cutting height adjustment.
SUBSTANCE: in the proposed method for adjustment of automatic control of plough level in existing breaking faces for each plough stage they register depth of cutting and angle of longitudinal inclination produced as a difference angle between the inclination of the shield support frame bed roof slab and inclination of the face conveyor in direction of mining. In the calculation device they calculate variation of face height per plough stage so that in the calculation device with each position of the face conveyor corresponding to one plough stage they correlate face height as the plan height. At the same time in process of achievement of the corresponding position in the face with the shield support frame following the plough with a delay in time, they calculate actual height of the face on the basis of values taken by inclination sensors installed on the shield support frame and compare them with the plan height stored in the memory. The value of heights difference determined for the appropriate position in the face between the plan height and actual height during the following plough stages is taken into account in the sense of effect of self-training by the calculation device in process of setting of the angle of longitudinal inclination adjustment in the plough stage for achievement of the plan height of the face.
EFFECT: higher accuracy and reliability of plough control in a bed profile.
23 cl, 10 dwg
SUBSTANCE: invention refers to mining industry and namely to control method of powered shield support. Method of controlled observance of a gap, preferably considering mine rock mechanics, between upper covering and coal face in mining faces is performed in the following way: during excavation of bituminous coal by means of underground method using slope sensors arranged at least on three of four main elements of each section of powered shield support there determined is slope of supporting covering and support slide in the cavity direction. On the basis of the measurement data, when changes in slope angle of supporting covering appear, influences on the gap between upper covering and coal face are determined in the calculation unit. Then, operating cycle of section of powered shield support, which includes unloading, supply and bracing, is controlled automatically to define an optimum gap between covering and coal face. Besides, slope sensors can be installed on support slide, goaf shield, load-carrying hinged cantilevers and in goaf area of supporting covering.
EFFECT: method allows monitoring and adjusting the gap between covering and coal face at advancing of extraction front; at that, hazard risk of formation roof destruction is minimised.
18 cl, 10 dwg
SUBSTANCE: adaptive system for movement of a construction machine measures counteracting forces applied by soil surface to a milling drum, and in response to measured changes of these counteracting forces it controls a moving force fed to a moving drive of the machine, or moderates speed of lowering of a rotary milling drum.
EFFECT: early and quick detection of such changes in counteracting forces makes it possible for a control system to assist in prevention of forward or backward list phenomena accordingly in a construction machine.
21 cl, 9 dwg
SUBSTANCE: invention relates to mining, particularly, to mining machine displacing along conveyor. Proposed machine comprises sensor system arranged on machine frame 11 to perceive boundary zone mineral wealth/host rock. Note here that machine frame front side has sensor system mount. Note also that geological radar is used as the sensor system. Said mount can be adjusted over height. Besides, it is composed of several parts and comprises main box with to and/or bottom holes to house geological radar. Deflectors are arranged on both sides of said main box.
EFFECT: possibility to sound entire front of second working.
12 cl, 5 dwg
FIELD: oil and gas production.
SUBSTANCE: proposed device comprises hydraulic cylinders, electrically control hydraulic control valves, oil unit, and remote control board. It comprises also boom turn (lift) angle and telescope position transducers. Heading drive motor current transducer. Microcontroller with memory containing algorithm of defining face rock toughness, maximum feed rates depending upon motor current. To determine delivery of axial piston pump, an appropriate algorithm is used. Said pump is controlled via frequency inverter by PDM signal from microcontroller output. Mean voltage is selected from microcontroller to control induction motor squirrel-cage rotor rpm by adjusting pump shaft rpm.
EFFECT: otimised heading drive load current control.
FIELD: mining industry.
SUBSTANCE: device has two asynchronous electric engines, connected via reducers to drive sprockets of continuous traction chain, provided with plane carriages with their possible displacement along the guide, and hydraulic cylinders for displacing guide on pit-face. To windings of stators of first and second electric engines connected respectively are outputs of first and second frequency converters, inputs of which are connected to power grid and control inputs of which are connected respectively to outputs of first and second frequency adjusters. To frequency adjusters also connected are inputs of load detectors, to outputs of which load balancing block is connected, outputs of which are connected to inputs of first frequency adjuster. To inputs of both frequency adjusters output of load adjuster is connected, inputs of which are connected to load-setting block and load sensor for second engine. To output of second frequency converter connected are input of control block, other input of which is connected to signal block of base plant, and stator winding of third asynchronous engine, which via mechanical link is connected to first and second hydraulic pumps, having constant working volumes. Output of first hydraulic pump is connected to force hydro-main and input of second preventing hydraulic valve and to first inputs of two-position hydraulic distributors with electromagnetic control, to electromagnets of which outputs of control block are connected. Second inputs of two-positional hydraulic distributors with electromagnetic control are connected to control chambers of hydro-controlled two-positional hydro-distributors, which are part of hydro-blocks. Outputs of hydro-controlled two-positional distributors are connected to opposite hollows of volumetric dosing device of each hydro-block, and their inputs are connected respectively to outputs of hydro-distributors for controlling hydro-cylinder for moving the guide on pit-face, inputs of each of which are connected to force and drain hydro-mains, and outputs are connected to piston and rod hollows of appropriate hydro-cylinder.
EFFECT: higher efficiency.