阅读说明：本技术 矿山井下皮带廊皮带更换方法 (Method for replacing belt of underground belt gallery of mine ) 是由 赵海杰 宋涛 王桂东 张雪媚 刘鹏金 曹善战 李海龙 刘传泽 孙浩 于 2021-08-02 设计创作，主要内容包括：本发明涉及一种矿山井下皮带廊皮带更换方法,包括检修前准备工作、安装新皮带以及回收旧皮带等步骤,本发明通过皮带自身的驱动电机作为安装新皮带以及回收旧皮带的驱动机构,不需要单独增加更换新皮带的驱动装置,且新皮带整体的更换无需固定装置,仅依靠新旧皮带之间的摩擦力即可,只需要制作两个皮带接头,极大地提高了皮带的检修速度,降低了检修工人的检修工作强度,提高了检修工作效率。(The invention relates to a method for replacing a belt of an underground belt gallery of a mine, which comprises the steps of preparation work before maintenance, installation of a new belt, recovery of an old belt and the like.)

1. A method for replacing a belt of a belt gallery under a mine well is characterized by comprising the following steps: the method comprises the following steps:

firstly, preparation work before maintenance:

(a) manufacturing a portal frame for winding a new belt in advance, and installing the portal frame outside a belt tail pulley;

(b) manufacturing two brackets for winding a new belt and recovering an old belt in advance;

(c) conveying A, B two new belts to the outer opening of the belt gallery channel, conveying the A belts to a portal frame for winding the belts, and winding all the belts on the portal frame for winding the belts for later use; winding the B belts into a large roll by using one of the winding belts manufactured in advance and a support, and then conveying the wound B belts to a tail pulley for later use;

(d) removing the ore retaining skin above the old belt, and removing the first-wheel mud scraping device;

II, installing a new belt:

(a) manually drawing the heads of the A new belts out of the gantry for winding the belts for 30m, placing the belts on the old belts to enable the new belts to be in close contact with the old belts, and fixing the heads of the A new belts with the old belts by iron wires;

(b) starting a belt motor, rotating an old belt, simultaneously drawing the new belt to move forwards by using the friction force between the new belt and the old belt until the head of the A new belt bypasses the head wheel to the lower part of the head wheel, running the tail end of the A new belt onto the upper layer old belt from a portal frame for winding the belt at the moment, and stopping the belt motor when the tail end of the A new belt reaches the first manufacturing joint position of the upper layer;

(c) after all the A new belts run onto the old belt, mounting the B belts wound into rolls on a portal frame for winding the belts;

(d) manually drawing the head of the B new belts to a position 3 meters beyond the tail ends of the A new belts, removing the roller frame at the first joint manufacturing position, respectively punching a pair of 1.6m board cards backwards at a position 4 meters away from the tail ends of the A new belts and a position 4 meters away from the head of the B new belts, fixing the 1.6m board cards on the roller frame, and starting to manufacture the first joints of the new belts;

(e) after the first joint of the new belt is manufactured, removing the device for manufacturing the joint, recovering the roller frame at the position of the first manufactured joint, and removing the tail ends of the A new belts and the 1.6m board cards at the heads of the B new belts; starting a belt motor, and pulling the B belts to move forwards by the friction force between the old belt and the new belt until the heads of the A belts bypass the tail pulley and are positioned above the tail pulley and reach the second joint manufacturing position of the upper layer, and at the moment, the tail ends of the B new belts move to the old belt of the upper layer;

(f) adjusting a tail pulley tensioning device to be in a most loose state, removing a roller bracket at the position of a second manufacturing head, removing iron wires for fixing the heads of the A new belts, punching 1 pair of 1.6m plate cards at the head of the A new belts and the tail end manufacturing position of the B new belts respectively, and tensioning the two pairs of 1.6m plate cards towards the middle by using two 3t chain blocks and a phi 12.5 rope buckle to manufacture a second belt joint;

(g) reversing the phase sequence of the belt motor while manufacturing a second belt joint; cutting off the lower layer of the old belt 2 meters behind the first wheel; simultaneously transporting the two winding belts to a ventilation roadway by using a bracket; a pair of 1.3m clamping plate cards are punched at the head of the lower-layer old belt 2 meters away from the tail wheel;

(h) after the second joint of the new belt is finished, removing the device for making the head, recovering the roller frame at the position of the second joint, and removing the 1.6m plate clips, the 3t chain blocks and the phi 12.5 rope clips at the head of the A new belt and the tail end of the B new belt; connecting a 1.3m clamping board with a head wheel side belt bracket by using a 1t chain block, pulling the head of an old belt at a tail wheel side to the head wheel direction by using the 1t chain block, and tensioning an old belt at an upper layer at the tail wheel;

(i) adjusting the tail pulley tensioning device to a tensioning state, and removing a 1.3m clamping plate card and a 1t chain block on the old belt;

(j) and recycling the old belt.

2. The method for replacing a belt of a mine underground belt gallery according to claim 1, wherein: the preparation work before the overhaul also comprises the following steps:

(a) installing a group of redirection supporting roller devices for redirecting the old belt to the ventilation shaft at the upper opening of the-270 ventilation shaft;

(b) a row of long carrier roller brackets for supporting the old belt in the process of recovering the old belt are arranged in a ventilation roadway at the position of the-270 rough draw shaft, and long carrier rollers are arranged on the long carrier roller brackets.

3. The method for replacing a belt of a mine underground belt gallery according to claim 2, wherein: the method for recycling the old belt comprises the following steps:

(a) cutting off the old belt 2 m behind the first wheel while manufacturing a second belt joint, and connecting a big rope to the head of the old belt, wherein the big rope is lowered to the bottom of the ventilation shaft from the ventilation shaft;

(b) starting a belt motor, and rotating a belt in a reverse direction; manually dragging an old belt towards a ventilation shaft of a belt channel, manually turning the head of the old belt at the lower layer into the ventilation shaft through a direction-changing carrier roller device, dragging the head of the old belt by a person at the bottom of the ventilation shaft through a big rope to smoothly lower the head to the bottom, dragging the head to one of supports for winding the belt through a row of long carrier roller supports arranged in the ventilation tunnel in advance, and manually winding the old belt on the supports for winding the belt;

(c) after all the old belts on the belt conveyor are turned into the lower layer, stopping a belt motor, and connecting the tail ends of the old belts with the large ropes by using iron wires;

(d) continuing to start a belt motor to rotate the old belt, manually pulling the old belt reversely through a big rope at the tail end of the old belt, and controlling the lowering speed of the old belt until the old belt is completely lowered to the bottom of the ventilation shaft;

(e) manually winding the old belt for half length, cutting off the old belt, and continuously winding the rest old belt at the bottom of the ventilation shaft on another winding belt bracket;

(f) after all the old belts are recovered, the reverse phase sequence of the motor is recovered to rotate forwards, and the first-wheel mud scraping device and the two ore blocking peels are recovered; removing the portal frame, the bend roller device and the long roller bracket for the winding belt;

(g) and testing the vehicle in an idle load manner, and adjusting a new belt.

4. The method for replacing a belt of a mine underground belt gallery according to claim 1, wherein: the portal frame for the belt winding comprises a vertically arranged support frame and a beam which is rotatably connected with the support frame, and the beam is horizontally arranged and used for hanging and winding a new belt.

5. The method for replacing a belt of a mine underground belt gallery according to claim 1, wherein: the support for the winding belt comprises a base, two vertical columns vertically installed on the base and a rotating shaft horizontally arranged, the rotating shaft is installed between the two vertical columns, and the two ends of the rotating shaft are respectively connected with the two vertical columns in a rotating mode.

6. The method for replacing a belt of a mine underground belt gallery according to claim 2, wherein: the bend carrier roller device comprises a plurality of aligning carrier roller supports arranged between the belt conveyor and the upper opening of the ventilation shaft, the aligning carrier roller supports are distributed in a fan shape, and aligning carrier rollers used for bearing and conveying old belts are installed on the aligning carrier roller supports.

Technical Field

The invention relates to a method for replacing a belt of an underground belt gallery of a mine, and belongs to the technical field of mining equipment.

Background

The belt gallery at the middle section-270 of the Jiuqu ore separation large initial mining area of Shandong gold mining industry (exquisite) Limited company has two sets of B =1200 belt conveyors, and is mainly responsible for ore and wool transportation work below the middle section-270, the belt transportation amount is large, the belt is seriously abraded, and the belt needs to be replaced irregularly. Particularly, the 1# belt has the total length of 370 meters and is not easy to replace due to narrow underground space.

The change mode to the belt in the pit among the prior art is for being divided into the three-section with 370 meters new belt, adopts the manpower to transport the belt to the belt corridor in grades to 3 belt connectors are done on the scene, adopt the manpower at last to cut into 3 meters inequality belt blocks with old belt and retrieve. The replacement method is time-consuming and labor-consuming, the belt needs to be replaced by 40 workers for carrying, the production time is occupied for more than 30 hours, the maintenance efficiency is low, and the working strength of maintenance personnel is high.

Disclosure of Invention

The invention provides a method for replacing a belt of an underground belt gallery of a mine, which is used for solving the technical problems of low overhauling efficiency and high labor intensity of the conventional underground belt of the mine.

In order to solve the technical problems, the invention adopts the following technical scheme:

a method for replacing a belt of a belt gallery under a mine well is characterized by comprising the following steps: the method comprises the following steps:

firstly, preparation work before maintenance:

(a) manufacturing a portal frame for winding a new belt in advance, and installing the portal frame outside a belt tail pulley;

(b) manufacturing two brackets for winding a new belt and recovering an old belt in advance;

(c) conveying A, B two new belts to the outer opening of the belt gallery channel, conveying the A belts to a portal frame for winding the belts, and winding all the belts on the portal frame for winding the belts for later use; winding the B belts into a large roll by using one of the winding belts manufactured in advance and a support, and then conveying the wound B belts to a tail pulley for later use;

(d) removing the ore retaining skin above the old belt, and removing the first-wheel mud scraping device;

II, installing a new belt:

(a) manually drawing the heads of the A new belts out of the gantry for winding the belts for 30m, placing the belts on the old belts to enable the new belts to be in close contact with the old belts, and fixing the heads of the A new belts with the old belts by iron wires;

(b) starting a belt motor, rotating an old belt, simultaneously drawing the new belt to move forwards by using the friction force between the new belt and the old belt until the head of the A new belt bypasses the head wheel to the lower part of the head wheel, running the tail end of the A new belt onto the upper layer old belt from a portal frame for winding the belt at the moment, and stopping the belt motor when the tail end of the A new belt reaches the first manufacturing joint position of the upper layer;

(c) after all the A new belts run onto the old belt, mounting the B belts wound into rolls on a portal frame for winding the belts;

(d) manually drawing the head of the B new belt to a position 3 meters beyond the tail end of the A new belt, removing the first support roller frame for manufacturing a joint, respectively punching a pair of 1.6m board cards backwards at a position 4 meters away from the tail end of the A new belt and a position 4 meters away from the head of the B new belt, fixing the 1.6m board cards on the support roller frame, and starting to manufacture a first joint of the new belt;

(e) after the first joint of the new belt is manufactured, removing the device for manufacturing the joint, recovering the roller frame at the position of the first manufactured joint, and removing the tail ends of the A new belts and the 1.6m board cards at the heads of the B new belts; starting a belt motor, and pulling the B belts to move forwards by the friction force between the old belt and the new belt until the heads of the A belts bypass the tail pulley and are positioned above the tail pulley and reach the second joint manufacturing position of the upper layer, and at the moment, the tail ends of the B new belts move to the old belt of the upper layer;

(f) adjusting a tail pulley tensioning device to the most loose state, removing a roller frame at the position where the second belt is manufactured to be a joint, removing iron wires for fixing the heads of the A new belts, punching 1 pair of 1.6m plate cards at the head parts of the A new belts and the tail end head manufacturing positions of the B new belts respectively, and tensioning the two pairs of 1.6m plate cards towards the middle by using two 3t chain reversers and a phi 12.5 rope buckle to manufacture a second belt joint;

(g) reversing the phase sequence of the belt motor while manufacturing a second belt joint; cutting off the old belt 2 meters behind the first wheel; simultaneously transporting the two winding belts to a ventilation roadway by using a bracket; a pair of 1.3m clamping plate cards are punched at the head of the lower-layer old belt 2 meters away from the tail wheel;

(h) after the second joint of the new belt is finished, removing the device for making the head, recovering the roller frame at the position of the second joint, and removing the 1.6m plate clips, the 3t chain blocks and the phi 12.5 rope clips at the head of the A new belt and the tail end of the B new belt; connecting a 1.3m clamping board with a head wheel side belt bracket by using a 1t chain block, pulling the head of an old belt at a tail wheel side to the head wheel direction by using the 1t chain block, and tensioning an old belt at an upper layer at the tail wheel;

(i) adjusting the tail pulley tensioning device to a tensioning state, and removing a 1.3m clamping plate card and a 1t chain block on the old belt;

(j) and recycling the old belt.

As a further improvement of the invention, the preparation work before the overhaul further comprises the following steps:

(a) installing a group of redirection supporting roller devices for redirecting the old belt to the ventilation shaft at the upper opening of the-270 ventilation shaft;

(b) a row of long carrier roller brackets for supporting the old belt in the process of recovering the old belt are arranged in a ventilation roadway at the position of the-270 rough draw shaft, and long carrier rollers are arranged on the long carrier roller brackets;

as a further improvement of the invention, recycling the old belt comprises the following steps:

(a) cutting off the old belt 2 m behind the first wheel while manufacturing a second belt joint, and connecting a big rope to the head of the old belt, wherein the big rope is lowered to the bottom of the ventilation shaft from the ventilation shaft;

(b) starting a belt motor, and rotating a belt in a reverse direction; manually dragging an old belt towards a ventilation shaft of a belt channel, manually turning the head of the old belt at the lower layer into the ventilation shaft through a direction-changing carrier roller device, dragging the head of the old belt by a person at the bottom of the ventilation shaft through a big rope to smoothly lower the head to the bottom, dragging the head to one of supports for winding the belt through a row of long carrier roller supports arranged in the ventilation tunnel in advance, and manually winding the old belt on the supports for winding the belt;

(c) after all the old belts on the belt conveyor are turned into the lower layer, stopping a belt motor, and connecting the tail ends of the old belts with the large ropes by using iron wires;

(d) continuing to start a belt motor to rotate the old belt, manually pulling the old belt reversely through a big rope at the tail end of the old belt, and controlling the lowering speed of the old belt until the old belt is completely lowered to the bottom of the ventilation shaft;

(e) manually winding the old belt for half length, cutting off the old belt, and continuously winding the rest old belt at the bottom of the ventilation shaft on another winding belt bracket;

(f) after all the old belts are recovered, the reverse phase sequence of the motor is recovered to rotate forwards, and the first-wheel mud scraping device and the two ore blocking peels are recovered; removing the portal frame, the bend roller device and the long roller bracket for the winding belt;

(g) and testing the vehicle in an idle load manner, and adjusting a new belt.

As a further improvement of the invention, the portal frame for winding the belt comprises a support frame which is vertically arranged and a beam which is rotationally connected with the support frame, wherein the beam is horizontally arranged and used for hanging and winding a new belt.

As a further improvement of the invention, the bracket for winding the belt comprises a base, two upright posts vertically arranged on the base and a rotating shaft horizontally arranged, wherein the rotating shaft is arranged between the two upright posts, and two ends of the rotating shaft are respectively and rotatably connected with the two upright posts.

As a further improvement of the invention, the redirection idler device comprises a plurality of aligning idler brackets arranged between the belt conveyor and the upper opening of the ventilation shaft, the aligning idler brackets are distributed in a fan shape, and aligning idlers for supporting and conveying the old belt are arranged on the aligning idler brackets.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the driving motor of the belt is used as a driving mechanism for installing a new belt and recycling an old belt, a driving device for replacing the new belt is not required to be added independently, a fixing device is not required for replacing the whole new belt, only friction force between the new belt and the old belt is required, and only two belt joints are required to be manufactured, so that the overhauling speed of the belt is greatly improved, the overhauling work intensity of an overhauling worker is reduced, and the overhauling work efficiency is improved;

2. according to the invention, the old belt is recycled at the ventilation shaft, and the waste belt is supported and supported by the redirection carrier roller device and the long carrier roller bracket in the process of recycling the old belt, so that the old belt is convenient to recycle, the old belt is not required to be cut and dragged for many times by manpower, the working efficiency is greatly improved, and the working intensity is reduced;

3. the new belt is transported to any place by using the low-chassis frame trolley, the total height of the new belt wound with the belt B is reduced, the new belt can conveniently enter the tail wheel through the belt channel inlet, and the labor intensity is further reduced.

Drawings

FIG. 1 is a schematic structural diagram of a gantry for winding a belt according to an embodiment of the present invention;

fig. 2 is a schematic illustration of the position of a redirecting idler device in an embodiment of the invention;

FIG. 3 is a schematic illustration of a process for recycling used belts in an embodiment of the present invention;

wherein, 1, a support frame; 2. a cross beam; 3. a bearing seat; 4. self-aligning carrier roller support.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

This example is a 270 belt corridor 1# belt replacement step:

first, preparation work before maintenance

(a) A portal frame for winding the belt is manufactured in advance, installed on the outer side of a tail pulley of the belt and used for hanging a new belt.

As shown in fig. 1, the portal frame for winding the belt comprises a vertically arranged support frame 1 and a beam 2 rotatably connected with the support frame 1, wherein the beam 2 is horizontally arranged, and the beam 2 is used for hanging and winding a new belt. Specifically, support frame 1 is installed bearing frame 3 on two stands of support frame 1 by 16# channel-section steel preparation respectively in this embodiment, and 2 both ends of crossbeam are installed respectively with the bearing of 3 one-to-one of bearing frame, and crossbeam 2 can rotate for with support frame 1 through the bearing.

(b) Two supports for winding the belt are manufactured in advance and used for winding a new belt and recycling an old belt.

The support for the winding belt comprises a base, two vertical columns vertically installed on the base and a rotating shaft horizontally arranged, wherein the rotating shaft is installed between the two vertical columns and is connected with the two vertical columns in a rotating mode. Specifically, in this embodiment the bearing frame is all installed on the top of every stand, the bearing with the bearing frame one-to-one is installed respectively at the both ends of rotation axis, and the rotation axis passes through the bearing and is connected with the stand rotation, and the rotation axis is used for twining new belt and old belt. The rotating shaft is made of phi 108-6 thick-wall pipes, and the specification of the rotating shaft is the same as that of the cross beam. In this embodiment, the rotating shaft and the cross beam can be replaced with each other.

(c) A low chassis pallet truck was made in advance for transporting new belts.

Low chassis frame sub-car includes the bearing chassis, installs the axletree in bearing chassis bottom and is used for removing a plurality of wheels of bearing chassis, and is concrete, the bearing chassis includes that the channel-section steel of two horizontal railways that set up and two vertical settings encloses the rectangle frame that closes the formation, axletree fixed mounting is in the bottom of rectangle frame, the wheel rotates with the both ends of axletree and is connected.

(d) And (3) conveying two new belts to the outer opening of the belt gallery passage, wherein one of the two new belts is 230 meters long (A belts), and the other belt is 140 meters long (B belts). Winding the B belts into a large roll by using one of the pre-manufactured winding belt brackets (paying attention to the front and back sides of the belts), then integrally detaching the wound B belts and the used rotating shafts (comprising bearings at the two ends of the rotating shafts) from the winding belt brackets (taking out the rotating shafts and the bearings by opening the bearing seats), and placing the winding belt brackets on a low-chassis frame vehicle.

The A belts are conveyed to a portal frame for winding the belts along a belt gallery channel, the A belts are completely wound on a cross beam of the portal frame for winding the belts for standby, and the B belts wound into rolls and rotating shafts (including bearings at two ends of the rotating shafts) used by the B belts are conveyed to a tail pulley through a belt channel inlet by a low chassis frame sub-vehicle for standby.

(e) In a ventilation roadway at the-270 rough draw shaft, a row of long carrier roller supports are arranged by utilizing channel steel from the lower part of the ventilation shaft to a large roadway railway, and long carrier rollers are arranged on the long carrier roller supports and are used for supporting an old belt in the process of recovering the old belt, so that the labor intensity is reduced.

(f) A group of bend supporting roller devices are installed at the upper opening of the ventilation shaft of the-270 belt channel, the lower layer of old belt can be bent to enter the ventilation shaft in the process of recovering the old belt, and the old belt is convenient to recover from the ventilation shaft, as shown in figure 2.

The change to bearing roller device in this embodiment includes a plurality of aligning bearing roller supports 4 that set up on the route by belt conveyer department to ventilation well head, and installation aligning bearing roller is used for bearing, transportation old belt on aligning bearing roller support 4, because the route by belt conveyer department to ventilation well head is the segmental arc, and consequently a plurality of aligning bearing roller supports 4 are fan-shaped and distribute.

(g) Removing ore blocking skins on two sides of the ore receiving groove of the two ore drawing funnels above the old belt, so that a new belt can pass through the ore blocking skins from the upper part; and removing the first-wheel mud scraping device.

Secondly, installing a new belt

(a) The iron wires are threaded on two sides of the head of the A new belt, the two big ropes are connected to the iron wires, the new belt is pulled by manually pulling the big ropes to pass through the two ore drawing hoppers by a distance of about 30m, then the new belt is placed above the old belt, the bottom surface of the new belt is in close contact with the top surface of the old belt, the new belt and the old belt are overlapped by 30m (the purpose is to increase the friction force between the new belt and the old belt and fix the new belt through the friction force), the two big ropes for pulling the head of the new belt are removed, the head of the new belt is connected with the old belt through the iron wires, the head of the new belt is prevented from falling off when rotating to the bottom of the first wheel, and at the moment, personnel are arranged at the positions of the two ore drawing hoppers and the tail wheel for nursing.

(b) Starting a belt motor, old belt rotates, utilize the frictional force between new belt and the old belt to pull new belt to move ahead simultaneously, the manpower cooperation expandes new belt, new belt head is observed new old belt connection condition when moving ahead to head pulley department, then continue to open belt motor, until with new belt bypass head pulley to head pulley below, the end of A new belt moves to the old belt of upper strata from the crossbeam of twining portal frame for the belt this moment, reach the first preparation of upper strata and connect the position, stop belt motor. The running process is followed closely and observed the motor rotation condition, observes motor operating current, and the iron wire has the condition of scraping or not, and new and old belt connection condition utilizes the intercom to contact in time, shuts down the processing when necessary.

(c) And after the A new belts all run from the portal frame for winding the belts to the old belts, removing the cross beams for winding the A new belts and the bearings at the two ends of the cross beams on the portal frame for winding the belts, and installing the B belts wound into rolls and the rotating shafts (including the bearings at the two ends of the rotating shafts) used by the B belts on the portal frame for winding the belts to replace the cross beams.

(d) The head of the B new belt is manually pulled to a position 3 meters away from the tail end of the A new belt, the roller frame at the joint position for first manufacture is removed, a pair of 1.6m board cards are respectively punched backwards at a position 4 meters away from the tail end of the A new belt and a position 4 meters away from the head of the B new belt, the 1.6m board cards are fixed on the roller frame, the belt is prevented from shifting, and the first joint of the new belt is manufactured.

(e) After the first joint of the new belt is manufactured, the device for making the head is removed, the roller frame at the joint position is recovered, and meanwhile, 1.6m board cards at the tail ends of the A new belts and the head parts of the B new belts are removed. Starting a belt motor, pulling the B belts to move forwards through friction force between the old belts and the new belts, unfolding the B new belts through manpower cooperation in the advancing process of the B belts until the heads of the A belts bypass the tail wheels and are positioned above the tail wheels, and reaching the second upper-layer manufacturing joint position, wherein the tail ends of the B new belts move to the upper-layer old belts from the portal frame for winding the belts at the moment.

(f) Adjusting a tail pulley tensioning device to the most loose state, removing a roller frame at the position of a second joint, removing iron wires between the head of the A new belt and the old belt, punching 1 pair of 1.6m plate cards at the head of the A new belt and the tail end of the B new belt, tensioning the two pairs of 1.6m plate cards towards the middle by using two 3t chain blocks and a phi 12.5 rope buckle at two sides of the two pairs of 1.6m plate cards, and manufacturing a second belt joint.

(g) When making the second belt joint, with belt motor phase inversion order (be convenient for realize the motor reversal after the starting belt motor), utilize 3t chain inversion to fix at belt passageway ventilation shaft department and change to the aligning bearing roller support of bearing roller device (prevent to change to the bearing roller device and receive old belt gravity when the ventilation shaft is transferred to old belt and remove), make things convenient for old belt to retrieve from this department and get into the ventilation shaft.

And cutting off the lower-layer old belt at the position 2 meters behind the first wheel at the ventilating shaft (inserting a wood board between the new and old belts before cutting to avoid damaging the new belt), connecting the head of the old belt with a big rope by using an electric hand drill and an iron wire, and lowering the big rope from the ventilating shaft to the bottom of the ventilating shaft (-270 ventilating tunnels) to prepare for recovering the old belt.

Simultaneously, the two supports for the winding belts are conveyed to the ventilation roadway, and handles used for driving the rotation shafts to rotate are respectively installed at one ends of the rotation shafts of the two supports for the winding belts, so that old belts can be wound conveniently.

(h) And (3) punching a pair of 1.3m clamping plate cards at the position of the lower-layer old belt, which is 2 meters away from the tail wheel.

Third, recycling old belt

(a) After the second joint of the new belt is completed, the device for making the head is removed, the roller frame at the position of the second joint is recovered, meanwhile, the 1.6m board card, the 3t chain block and the phi 12.5 rope buckle at the head of the A new belt and the tail end of the B new belt are removed, the looseness degree of the upper-layer old belt is observed, the 1.3m clamping board card is connected with the belt bracket at the head wheel side by the 1t chain block, the head of the tail wheel side old belt is pulled towards the head wheel direction by the 1t chain block, and the upper-layer old belt at the tail wheel is tensioned.

(b) And (4) adjusting the tail pulley tensioning device to a tensioning state, and removing the 1.3m clamping plate card and the 1t chain block on the old belt.

(c) And starting a belt motor, and rotating the belt in the reverse direction. The manual work drags old belt to belt passageway ventilating shaft direction through big rope, with the head of belt passageway ventilating shaft department lower floor's old belt via changing to bearing roller device, then turn over to the ventilating shaft in by the manual work, the ventilating shaft bottom personnel utilize big rope to pull the head of old belt, make it transfer to the bottom smoothly, on one of them winding support for the belt was dragged to one of them via the long bearing roller support of a row of installing in advance in the ventilation tunnel, the manual work passes through the rotation of handle drive rotation axis, twines old belt on winding support for the belt. (by using interphone communication, constantly pay attention to observe the running conditions of the old belt and the new belt, adjust in time, prevent the belt from deviating and pay close attention to observe the running conditions of the old belt in a ventilation well.)

(d) And after all the old belts on the belt conveyor are turned into the lower layer, connecting the tail ends of the old belts with the big ropes by using iron wires.

(e) Continue to open belt motor and rotate old belt, the manual work is through big reverse holding old belt of rope, and the speed is transferred to the old belt of control, prevents that speed is too fast, and uncontrollable is until transferring all to the ventilation shaft bottom old belt.

And manually winding the old belt for about half of the length, cutting off the old belt, and continuously winding the rest old belt at the bottom of the ventilation shaft on another bracket for winding the belt.

(f) And after the old belt is completely recovered, the reverse phase sequence of the motor is recovered to rotate forwards. Recovering two ore receiving grooves for blocking ore peels and a first-wheel mud scraping device. And removing the portal frame for the winding belt, the bend roller device and the long roller bracket.

(g) And testing the vehicle in an idle load manner, and adjusting a new belt. And extracting mineral wool and testing.