CN104948213A - Gob-side entry retaining method used for remote-control coal mining - Google Patents
Gob-side entry retaining method used for remote-control coal mining Download PDFInfo
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- CN104948213A CN104948213A CN201510235485.7A CN201510235485A CN104948213A CN 104948213 A CN104948213 A CN 104948213A CN 201510235485 A CN201510235485 A CN 201510235485A CN 104948213 A CN104948213 A CN 104948213A
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- work plane
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Abstract
A gob-side entry retaining method used for remote-control coal mining includes forepoling, gob return roadway supporting, return roadway and retained roadway supporting, stress sensor and distance sensor settings and the like. Roadways are retained by forepoling caving and gob roadway supporting safely and conveniently. The retained roadways are kept safe in the return roadways by the aid of a self-advancing hydraulic support. The self-advancing hydraulic support can advance along with the working face under control of a working face control center, and waste of integral support of the roadways is avoided. Actions of the self-advancing hydraulic support are correlated with those of a coal cutter, and automatic unmanned exploration of the working face is facilitated.
Description
Technical field
The present invention relates to a kind of method of gob side entry retaining, particularly relate to a kind of gob-side entry retaining method using remote control technology to carry out long-range coal mining operation.
Background technology
Gob side entry retaining be a kind of at coal-face rear along edge, goaf; employing pillar installs, the crossheading of a upper section remains along goaf by the method such as waste pack, filling concrete of building by laying bricks or stones; stope drift active workings as next section continue to use, and cancel the stope drift active workings support technology of protection coal pillar between section.
Existing edge air gallery technology, normally after work plane pushes through, remains stope drift active workings total length, and in large-scale mine, the length of stope drift active workings often reaches km, stays the length in the lane also corresponding length with a few km.By the impact of goaf top plate activity, stay the middle part of lane country rock can be subject to very large rock stress effect.Due to the accumulation of stress, if stay lane longer for service time, more than 5 times of deflection during roadway deformation amount can reach driving, cause the sharply contraction in drift section direction, affect the normal function in tunnel., usually needing staying lane to carry out a large amount of supportings in the sound field of colliery for this reason, ensureing the safety in tunnel.
The gob-side entry retaining support in the past adopted, mostly by the tunnelling before stope back production and back production Hou Liu lane separate, do not consider as a whole, gob side entry retaining be not considered as a systematic engineering of business, only when needed to need pay close attention to point carry out supporting.As work plane personnel, due to the deformation and stress that stay lane can be monitored at any time, therefore can also satisfy the demand reluctantly, but push button coal mining in the unmanned work plane of technology in use, because work plane does not have staff under normal circumstances substantially, be difficult to find immediately when staying lane to occur bursting problem, therefore, must in advance to staying lane to make supporting.But another aspect, if excessively supporting, just likely causes the increase of supporting expense, is unfavorable for the cost control of work plane.
Therefore, it is simple that a kind of technique is badly in need of in this area, and speed of application is fast, stays lane technology safely and efficiently, and it can meet the needs that work plane Remote is mined.
Summary of the invention
For solving the problem, the present invention proposes a kind of gob-side entry retaining method of mining for Remote, comprises the following steps:
1. at first advance 3m place, open side with the width below the half length of face length, open side section and adopt linked network supporting and/or individual prop supporting,
Described linked network supporting comprises top board and hangs diamond mesh, the mesh spacing of diamond mesh is 5 × 8cm, φ 13.4mm anchor cable is used to fix diamond mesh, anchor cable length is not less than 3000mm, be connected and be interposed between 10 ~ 25cm between anchor cable, top board is hung between rhombus net and is carried out whitewashing process to top board, shotcrete thickness is not less than 3mm, whitewashing spice adopts cement, sand and spoil, mixing by stirring, using pulp shooting machine to spray, during injection, pulp shooting machine is 0.3 ~ 0.4MPa for wind pressure, pressure of supply water is 0.6MPa, and water/binder ratio is 0.45; Described support unit supporting comprises and arranges many hydraulic props, and hydraulic prop comprises support column and the hinged back timber of support column, and the Area of bearing of back timber is not more than 4.5 with the ratio of the sectional area of support column;
2. fall behind work plane in the side, Dai Liu lane of stope and goaf return airway is set every 5m, goaf return airway is by grillage and the supporting of spoil bag, described grillage connects top and arranges, grillage width is 0.05 ~ 0.1 with the width ratio of goaf return airway, be 2.5 ~ 5m along the adjacent grillage spacing of goaf return airway length direction, between grillage, adopt spoil bag to fill;
In the distance of each side 10m 3. in return airway centered by work plane, every 2m, one frame self-advancing hydraulic support is set, in the distance of the left and right sides 10 ~ 30m in return airway centered by work plane, every 5m, one frame self-advancing hydraulic support is set, in the distance of the left and right sides 30 ~ 100m in return airway centered by work plane, every 10m, one frame self-advancing hydraulic support is set, the direction of motion of hydraulic support is identical with the length direction of return airway, hydraulic supporting bridge joint top is arranged, its width is not more than 0.1 with staying the width in lane ratio, each hydraulic support is provided with bracket controller, each bracket controller is electrically connected with work plane control centre respectively,
4. in return airway, a strain gauge group is set at interval of certain distance, the right strain gauge that described strain gauge group at least comprises the upper stress sensor be arranged on top board, is arranged on the left strain gauge in left wall and is arranged in right wall, described upper stress sensor, left strain gauge and right strain gauge have one respectively at least, described strain gauge group is connected with wireless launcher, described wireless launcher electrical connection work plane control centre;
5. arrange by the stroke sensor of coal-winning machine action triggers in work plane both sides.
Preferably step 5. in, described stroke sensor is connected with counter.
Preferably step 3. in, described bracket controller comprises wireless transmitter, the wireless transmitter wireless connections of itself and described work plane control centre.
The invention has the advantages that: carry out staying lane, safe ready by opening the mode such as side, goaf return airway supporting in advance; In return airway, carry out supporting by self-advancing hydraulic support, ensure the Roadway Safety staying lane; Self-advancing hydraulic support can move forward with work plane under the control of work plane control centre, avoids the waste of tunnel integer support; The action of self-advancing hydraulic support is associated with the action of coal-winning machine, is convenient to the automation Manless mining realizing work plane.
Accompanying drawing explanation
Accompanying drawing 1 is the floor map of gob side entry retaining of the present invention.
Reference numeral is as follows:
1-work plane (bank); 2-coal-winning machine; 3-return airway (staying lane); 4-grillage; 5-spoil bag; 6-self-advancing hydraulic support.
Detailed description of the invention
Be described in detail below in conjunction with the preferred embodiment of accompanying drawing 1 to the gob-side entry retaining method for Remote coal mining of the present invention.
In the actual production of work plane, coal-winning machine along the tangential motion of work plane, coal body from work plane adopt lower after fall into scrapper conveyor and transfer out, along with moving ahead gradually of coal-winning machine, the top board spontaneous caving at scrapper conveyor rear forms goaf.In gob side entry retaining coal-mining method, the return airway of work plane side is not caving after coal-winning machine moves ahead, and the stope drift active workings as next stage use.
In the present embodiment, for adapting to the needs that Remote is mined, comprise the following steps in gob-side entry retaining method:
In first advance a distance, as about 3m, open side with the width of the half being no more than face length, open side section and adopt linked network supporting and/or individual prop supporting, above-mentioned supporting is advance support, and it is the basis of stability of the roadway, therefore preferably adopts the combined supporting of linked network and pillar.
Linked network supporting comprises top board and hangs diamond mesh, diamond mesh adopts wire rope establishment, grid specification is 5 × 8cm, the glass fiber reinforced plastic anchor cable of φ 13.4mm is used to fix diamond mesh, anchor head fixes on wire lath, anchor cable length is generally not less than 3000mm, go deep into the minimum 2000mm of length of top board, be interposed between 10 ~ 25cm between adjacent two anchor cables, top board is hung between rhombus net and is needed to carry out whitewashing process to top board, shotcrete thickness is not less than 3mm, whitewashing spice adopts spoil, because spoil can be gathered materials on the spot, therefore the content of spoil can be tried one's best height, adopt a small amount of cement and sand as bonding agent, use after mixing by stirring, use pulp shooting machine sprays, during injection, pulp shooting machine is 0.3 ~ 0.4MPa for wind pressure, pressure of supply water is 0.6MPa, water/binder ratio is about 0.45, support unit supporting comprises and arranges many hydraulic props, and hydraulic prop comprises support column and the hinged back timber of support column, and the Area of bearing of back timber is not more than 4.5 with the ratio of the sectional area of support column, is advisable with 1 ~ 2m in the interval between adjacent struts,
Lag behind work plane in the side, Dai Liu lane of stope and goaf return airway is set every 5m, goaf return airway is by grillage and the supporting of spoil bag, grillage is groined type structure substantially, connect top to arrange, width is 0.05 ~ 0.1 with the width ratio of goaf return airway, avoid too wide affect personnel pass through, be 2.5 ~ 5m along the adjacent grillage spacing of goaf return airway length direction, grillage is arranged alternately in both sides, tunnel, minimum distance from wall is not less than 0.5m, adopt spoil bag to fill between grillage, and note leaving walkway in filling process;
In the distance of each side 10m in return airway centered by work plane, every 2m, one frame self-advancing hydraulic support is set, in the distance of the left and right sides 10 ~ 30m in return airway centered by work plane, every 5m, one frame self-advancing hydraulic support is set, in the distance of the left and right sides 30 ~ 100m in return airway centered by work plane, every 10m, one frame self-advancing hydraulic support is set, the direction of motion of hydraulic support is identical with the length direction of return airway, hydraulic supporting bridge joint top is arranged, its width is not more than 0.1 with staying the width in lane ratio, hydraulic support is arranged alternately in both sides, tunnel, each hydraulic support is provided with bracket controller, each bracket controller is connected with the wireless transmitter of work plane control centre respectively by wireless transmitter, action is carried out in the instruction receiving work plane control centre,
In return airway, a strain gauge group is set at interval of certain distance, the right strain gauge that strain gauge group at least comprises the upper stress sensor be arranged on top board, is arranged on the left strain gauge in left wall and is arranged in right wall, upper stress sensor, left strain gauge and right strain gauge have one respectively at least, strain gauge group is connected with wireless launcher, wireless launcher electrical connection work plane control centre;
Arrange by the stroke sensor of coal-winning machine action triggers in work plane both sides, stroke sensor is connected with counter, and counter is provided with wireless base station apparatus, sends its numerical value to work plane control centre.
In work manufacturing process, the STRESS VARIATION situation in Real-Time Monitoring return aircourse is carried out according to the numerical value of each strain gauge, once monitor somewhere stress mutation to reach limit value, then work plane control centre just controls the self-advancing hydraulic support rise support of corresponding position, tunnel is avoided to deform, coal-winning machine is at every turn through head or tail, automatic triggering stroke sensor, by counter records triggering times, send work plane control centre to, work plane control centre just can calculate the distance of coal-winning machine advance by triggering times and feed distance, the reasonable support distances in tunnel is determined according to roof conditions, when forward travel distance reaches reasonable support distances, the self-advancing hydraulic support controlled in return airway moves, thus realize the continuous support staying lane.
The above; be only patent of the present invention preferably detailed description of the invention; but the protection domain of patent of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope of patent diselosesll of the present invention; the change that can expect easily or replacement, within the protection domain that all should be encompassed in patent of the present invention.
Claims (3)
1., for the gob-side entry retaining method that Remote is mined, it is characterized in that, comprise the following steps:
1. at first advance 3m place, open side with the width below the half length of face length, open side section and adopt linked network supporting and/or individual prop supporting,
Described linked network supporting comprises top board and hangs diamond mesh, the mesh spacing of diamond mesh is 5 × 8cm, φ 13.4mm anchor cable is used to fix diamond mesh, anchor cable length is not less than 3000mm, adjacent anchor cable interval is between 10 ~ 25cm, top board is hung between rhombus net and is carried out whitewashing process to top board, shotcrete thickness is not less than 3mm, whitewashing spice adopts cement, sand and spoil, mixing by stirring, using pulp shooting machine to spray, during injection, pulp shooting machine is 0.3 ~ 0.4MPa for wind pressure, pressure of supply water is 0.6MPa, and water/binder ratio is 0.45; Described support unit supporting comprises and arranges many hydraulic props, and hydraulic prop comprises support column and the hinged back timber of support column, and the Area of bearing of back timber is not more than 4.5 with the ratio of the sectional area of support column;
2. fall behind work plane in the side, Dai Liu lane of stope and goaf return airway is set every 5m, goaf return airway is by grillage and the supporting of spoil bag, described grillage connects top and arranges, grillage width is 0.05 ~ 0.1 with the width ratio of goaf return airway, be 2.5 ~ 5m along the adjacent grillage spacing of goaf return airway length direction, between grillage, adopt spoil bag to fill;
In the distance of each side 10m 3. in return airway centered by work plane, every 2m, one frame self-advancing hydraulic support is set, in the distance of the left and right sides 10 ~ 30m in return airway centered by work plane, every 5m, one frame self-advancing hydraulic support is set, in the distance of the left and right sides 30 ~ 100m in return airway centered by work plane, every 10m, one frame self-advancing hydraulic support is set, the direction of motion of hydraulic support is identical with the length direction of return airway, hydraulic supporting bridge joint top is arranged, its width is not more than 0.1 with staying the width in lane ratio, each hydraulic support is provided with bracket controller, each bracket controller is electrically connected with work plane control centre respectively,
4. in return airway, a strain gauge group is set at interval of certain distance, the right strain gauge that described strain gauge group at least comprises the upper stress sensor be arranged on top board, is arranged on the left strain gauge in left wall and is arranged in right wall, described upper stress sensor, left strain gauge and right strain gauge have one respectively at least, described strain gauge group is connected with wireless launcher, described wireless launcher electrical connection work plane control centre;
5. arrange by the stroke sensor of coal-winning machine action triggers in work plane both sides.
2. gob-side entry retaining method as claimed in claim 1, is characterized in that: step 5. in, described stroke sensor is connected with counter.
3. gob-side entry retaining method as claimed in claim 1, is characterized in that: step 3. in, described bracket controller comprises wireless transmitter, the wireless transmitter wireless connections of itself and described work plane control centre.
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| CN201510235485.7A CN104948213A (en) | 2015-05-11 | 2015-05-11 | Gob-side entry retaining method used for remote-control coal mining |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339831A (en) * | 2018-09-28 | 2019-02-15 | 淮南矿业(集团)有限责任公司 | A kind of crossheading big cross section freeboard section connects top method and connects top |
| CN109869175A (en) * | 2019-03-15 | 2019-06-11 | 济宁矿业集团有限公司霄云煤矿 | A kind of hybrid advanced support method of fully-mechanized mining working |
| CN110043257A (en) * | 2019-06-05 | 2019-07-23 | 中国矿业大学(北京) | A kind of coalcutter automatic reversing system |
| CN111271098A (en) * | 2020-01-16 | 2020-06-12 | 国家能源集团宁夏煤业有限责任公司 | Construction method for gob-side entry retaining under metal false roof beside coal pillar |
| CN114412500A (en) * | 2021-12-13 | 2022-04-29 | 国家能源集团宁夏煤业有限责任公司枣泉煤矿 | Coal face top roof supporting device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339831A (en) * | 2018-09-28 | 2019-02-15 | 淮南矿业(集团)有限责任公司 | A kind of crossheading big cross section freeboard section connects top method and connects top |
| CN109869175A (en) * | 2019-03-15 | 2019-06-11 | 济宁矿业集团有限公司霄云煤矿 | A kind of hybrid advanced support method of fully-mechanized mining working |
| CN110043257A (en) * | 2019-06-05 | 2019-07-23 | 中国矿业大学(北京) | A kind of coalcutter automatic reversing system |
| CN111271098A (en) * | 2020-01-16 | 2020-06-12 | 国家能源集团宁夏煤业有限责任公司 | Construction method for gob-side entry retaining under metal false roof beside coal pillar |
| CN111271098B (en) * | 2020-01-16 | 2021-06-08 | 国家能源集团宁夏煤业有限责任公司 | Construction method for gob-side entry retaining under metal false roof beside coal pillar |
| CN114412500A (en) * | 2021-12-13 | 2022-04-29 | 国家能源集团宁夏煤业有限责任公司枣泉煤矿 | Coal face top roof supporting device |
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Application publication date: 20150930 |