CN103424055B - Totally-enclosed non-pedestrian tunnel caving angle observation procedure - Google Patents
Totally-enclosed non-pedestrian tunnel caving angle observation procedure Download PDFInfo
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- CN103424055B CN103424055B CN201310326674.6A CN201310326674A CN103424055B CN 103424055 B CN103424055 B CN 103424055B CN 201310326674 A CN201310326674 A CN 201310326674A CN 103424055 B CN103424055 B CN 103424055B
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Abstract
The present invention relates to coal and gas power phenomenon field, specifically a kind of totally-enclosed non-pedestrian back caving angle observation procedure.Comprise survey line straightening device and survey line collapsing length self-recording unit, by cooperatively interacting between the two, realize the test to totally-enclosed non-pedestrian tunnel caving angle.The present invention can observe with the caving angle of the advance of the face and back deflection closed roadway tunnel fire dam is outer, and the effective relation disclosed between totally-enclosed non-pedestrian tunnel and workplace water component.Observed result is clear directly perceived, and implementation process is safe and reliable.The invention solves totally-enclosed non-pedestrian tunnel caving angle and test this difficult problem, (inclining) is walked to further test roof and provides method to the caving angle in high-order gas pumping lane, foundation is provided to the layer position determining that roof is walked (inclining) to high-order gas drainage lane, has important meaning to raising gas pumping efficiency.
Description
Technical field
The present invention relates to coal and gas power phenomenon field, specifically a kind of method of testing totally-enclosed non-pedestrian back caving angle.The method is applicable in coal production process, observation is carried out with the caving angle of the advance of the face in the totally-enclosed non-pedestrian tunnel arranged for mash gas extraction, clearly this tunnel is caving the relation between workplace periodic weighting step pitch further, for the determination of totally-enclosed non-pedestrian tunnel correlation parameter and maintenance mode thereof provide theoretical direction.
Background technology
Current mine gas disaster is still one of accident of restriction China's coal-mine safety in production, simultaneously gas still cause greenhouse effect, the source of the air environmental pollution such as to damage the ozone layer.In addition, the inflammable gas of gas or a kind of economy is high heat, cleaning, the easily energy.Coal-bed gas integrates profit and evil; it is the distinctive precious resources in colliery; effective, the safety that realize coal and non-coal two spike-type cultivars are adopted altogether; the triple effects such as mine safety production, environmental protection and new forms of energy supply can be realized; obtain significant economic and social benefit, control of coalmine gas has utilized and has listed " 863 " state key brainstorm project in by current country.
Colliery arranges high-order gas pumping tunnel mainly to arrange that above roof totally-enclosed non-pedestrian gas pumping tunnel is main extraction means, wherein arrange trend or be inclined to high-order gas pumping lane to be one of important means of comprehensive regulation gas in current pit mining process along roof, and layout layer position, high-order gas pumping lane is whether reasonable, decide again the quality of gas pumping effect and the complexity of roadway maintenance.Wherein high-order extraction lane is again one of key factor of impact layer position, high-order gas pumping lane selection with the caving angle during advance of the face.At present, the mine of all employings of China high-order gas pumping lane mash gas extraction, because high-order gas pumping lane is that two ends seal during use, almost cannot test the caving angle of this tunnel with the advance of the face, be difficult to determine the relation between the high-order extraction tunnel of gas and coal face advance distance, make gas extraction concentration be difficult to all the time reach satisfied effect.
Summary of the invention
In order to determine the relation between this tunnel and workplace water component, thus solve the caving angle how determining high-order gas pumping lane, be the key issue improving gas extraction concentration, the invention provides a kind of totally-enclosed non-pedestrian tunnel caving angle observation procedure.
Technical solution of the present invention is: a kind of totally-enclosed non-pedestrian tunnel caving angle observation procedure, comprise survey line straightening device and survey line collapsing length self-recording unit, survey line straightening device is made up of weight (6), pulley (2) and survey line (3), survey line collapsing length self-recording unit is made up of survey line collapsing length auto testing instrument (1) and survey line (3), comprise the steps: to arrange some measuring points along back in high-order gas pumping tunnel, each measuring point being arranged in internal heads place, tunnel all connects a weight (6), and binding firmly; In inside, tunnel, a ceramic pulley (2) is set every 5 ~ 10m, is used for ensureing the straight of interim survey line; The other end of survey line (3) utilizes PE to manage (5) as reducing, by the fire dam (7) of survey line (3) pull-out suction road, is connected with survey line collapsing length self-recording device (1); Calculate being caving highly of its superincumbent stratum according to working seam thickness, outside the fire dam of high-order extraction tunnel, reserve the survey line of possibility length accordingly in advance, guarantee that survey line has enough tensile elongations; Work as the advance of the face, through high-order gas pumping lane, due to this tunnel of effect bending subsidence and even be caving suddenly gradually of rock pressure [in mine, in whole process, in tunnel, the weight (6) of survey line end declines along with the motion of suction road under gravity, thus make fire dam (7) outer survey line (3) free end produce corresponding displacement, thus realize the measurement it being caving to degree and caving angle.
Described survey line (3) arrangement is as follows: at the scene in work progress, according to tunnel developed width, presets 4 ~ 5 surveys line (3), can be arranged in 1/3 scope of the totally-enclosed non-pedestrian tunnel total length carrying out testing respectively; A weight is arranged in each survey line (3) one end, and with smooth insulated copper silk rope by weight (6) fixation in roadway floor; The ceramic pulley (2) of survey line (3) through arranging every 5 ~ 10 meters is pulled near fire dam (7), (5) are managed as reducing again by PE, survey line (3) is caused test tunnel fire dam (7) outside, be connected with survey line collapsing length self-recording device (1).
The present invention can airtightly in tunnel to observe with the caving angle of the advance of the face and back deflection closed roadway outward, and the effective relation disclosed between totally-enclosed non-pedestrian tunnel and workplace water component.Observed result is clear directly perceived, and implementation process is safe and reliable.This method of testing solves totally-enclosed non-pedestrian tunnel caving angle and tests this difficult problem, (inclining) is walked to further test roof and provides method to the caving angle in high-order gas pumping lane, foundation is provided to the layer position determining that roof is walked (inclining) to high-order gas drainage lane, has important meaning to raising gas pumping efficiency.
Accompanying drawing explanation
Fig. 1 is survey line straightening device of the present invention and survey line collapsing length self-recording unit structural representation;
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is each survey line daily progression rate result schematic diagram.
Embodiment
The present invention includes survey line straightening device and survey line collapsing length self-recording unit, by cooperatively interacting between the two, realize the test to totally-enclosed non-pedestrian tunnel caving angle.Wherein survey line straightening device is made up of weight 6, pulley 2 and survey line 3; Survey line collapsing length self-recording unit is made up of survey line collapsing length auto testing instrument 1 and survey line 3.In high-order gas pumping tunnel, arrange some measuring points along back, each measuring point being arranged in internal heads place, tunnel all connects a survey line straightening device, and binding firmly.In inside, tunnel, a ceramic pulley is set every 5 ~ 10m, is used for ensureing the straight of interim survey line.Survey line 3, as reducing, is pulled out the fire dam 7 of suction road, is connected with survey line collapsing length self-recording device 1 by the PE pipe 5 that the other end of survey line 3 utilizes diameter to be 2.5cm.Calculate being caving highly of its superincumbent stratum according to working seam thickness, outside the fire dam of high-order extraction tunnel, reserve the survey line of possibility length accordingly in advance, guarantee that survey line has enough tensile elongations.Work as the advance of the face, through high-order gas pumping lane, due to this tunnel of effect bending subsidence and even be caving suddenly gradually of rock pressure [in mine, in whole process, in tunnel, the survey line straightening device of survey line end declines along with the motion of suction road under gravity, thus make the outer survey line free end of fire dam produce corresponding displacement, thus realize the measurement it being caving to degree and caving angle.
Survey line 3 arrangement: in observation program site operation process, due to the restriction of span length, in order to ensure the lateral separation between each measuring point, can according to tunnel developed width, preset 4 ~ 5 surveys line 3, can be arranged in respectively in 1/3 scope of the totally-enclosed non-pedestrian tunnel total length carrying out testing.A survey line straightening device is arranged in each survey line 3 one end, and with the smooth insulation copper rope of diameter 3mm by this device fixation in roadway floor.The ceramic pulley 2 of survey line 3 through arranging every 5 ~ 10 meters is pulled near fire dam, then by the PE pipe 5 of diameter 2.5cm as reducing, is caused by survey line 3 outside test tunnel fire dam 7, be connected with survey line shift-in amount auto testing instrument 1.
Embodiment:
The present invention select certain high methane colliery at its main mining coal seam top board along the totally-enclosed non-pedestrian gas pumping tunnel that bearing is arranged as site test district.Calculate according to working seam thickness, its superincumbent stratum is caving height can not more than 10m, and therefore, outside the fire dam of test tunnel, 10 ~ 15m reserved by every bar survey line 3.When workplace pushes through suction road, due to the effect of rock pressure [in mine, the top board bending subsidence and even be caving suddenly gradually in test tunnel, the survey line testing fire dam inside, tunnel in whole process along with back sinking and be caving and move down, thus make the survey line free end outside fire dam produce corresponding displacement, thus test the caving angle in this tunnel.
Observation station arrangement: in observation program field conduct process, due to the restriction of span length, in order to ensure the lateral separation between each measuring point, according to on-the-spot tunnel developed width, final decision arranges 4 surveys line 3 along back: wherein 2 are positioned in the middle part of tunnel, and other 2 are positioned at roadway's sides.By being distributed in each pulley 2 inside tunnel fire dam 7 and survey line 3,4 surveys line 3 are drawn to distance fire dam 130m, 110m, 90m and 70m place, tunnel, a weight 6 is arranged at the end of each measuring point, and with the smooth insulation copper rope of diameter 3mm by this weight 6 and survey line 3 fixation, ensure that survey line 3 moment is in straight condition.Caused tunnel fire dam 7 outside by the PE pipe 5 of diameter 2.5cm as reducing at the other end of survey line 3, in order to ensure that test macro can be measured accurately to tunnel caving angle and deflection thereof, the survey line 3 of reserved 10 ~ 15m length outside the fire dam of tunnel, and its free termination is connected with survey line collapsing length auto testing instrument 1.
In advance of the face process, originally tunnel form maintains the original state substantially, and after the advance of the face one segment distance, under the effect of rock pressure [in mine, distortion appears sinking in tunnel, and workplace continues to advance, and being caving finally appears in tunnel.After this along with the continuation of workplace advances, tunnel presents the periodicity polyisomenism of above-mentioned three kinds of distortion, in the process, survey line 3 along with the sinking in tunnel and can be caving the corresponding movement of generation, survey line 3 free end through survey line collapsing length auto testing instrument 1 outside tunnel fire dam 7 then can move forward thereupon, survey line collapsing length auto testing instrument 1 can be monitored in real time to the shift-in amount of survey line 3, thus ensure that survey line 3 pairs of tunnels are caving the continuity of overall process test, make test result can reflect caving angle and the shift-in amount thereof in tunnel more accurately, simultaneously also find out observation back when deflection by the size of survey line 3 shift-in amount, when be caving.
The method has carried out type approval test at certain high methane coal master mining face, observes with roadway deformation deflection and caving angle thereof in advance of the face process its totally-enclosed non-pedestrian tunnel.According to on-site actual situations, before this coal master's mining face top board moves towards totally-enclosed non-pedestrian roadway linking, the length of 4 measuring points in this tunnel of arranging along its dynamic version is respectively: about the length 160m of 1# survey line in this tunnel, about the length 135m of 2# survey line in this tunnel, about the length 110m of 3# survey line in this tunnel, about the length 80m of 4# survey line in this tunnel.
To arranging in tunnel that each measuring point deflection is measured, draw the test result as Fig. 3.Along with workplace constantly advances, superincumbent stratum sinks, thus each measuring point is sunk thereupon, is finally caving.As can be seen from the figure, at 1# survey line shortening on June 16 ~ 17 3cm, June 22 ~ 23,2# survey line shortened 3.5cm, and June 27 ~ 28,3# survey line shortened 10.9cm, and July 2 ~ 3,4# survey line shortened 18.6cm.By survey line above reduce the distance can judge 1# ~ 4# measuring point be caving the time and be respectively: June 16 ~ 17, June 22 ~ 23, June 27 ~ 28, July 2 ~ 3.In conjunction with on-the-spot actual Roof Span, test point distance workplace distance and workplace day push-in stroke and test result be analyzed and can find, June 16 ~ 17, June 22 ~ 23, June 27 ~ 28, July 2 ~ 3 p-wire there occurs respectively and shorten largely, illustrate that now this top board moves towards totally-enclosed non-pedestrian tunnel and is caving, thus determine that the caving angle that this coal master's mining face top board moves towards totally-enclosed non-pedestrian tunnel is 24m, 26m and 20m, average 23.3m.
Claims (2)
1. a totally-enclosed non-pedestrian tunnel caving angle observation procedure, comprise survey line straightening device and survey line collapsing length self-recording unit, survey line straightening device is by weight (6), pulley (2) and survey line (3) composition, survey line collapsing length self-recording unit is made up of survey line collapsing length auto testing instrument (1) and survey line (3), it is characterized in that: comprise the steps: to arrange some measuring points along back in high-order gas pumping tunnel, each measuring point being arranged in internal heads place, tunnel all connects a weight (6), and binding firmly, in inside, tunnel, a pulley (2) is set every 5 ~ 10m, is used for ensureing the straight of interim survey line, the other end of survey line (3) utilizes PE to manage (5) as reducing, by the fire dam (7) of survey line (3) pull-out suction road, is connected with survey line collapsing length self-recording device (1), calculate being caving highly of its superincumbent stratum according to working seam thickness, outside the fire dam of high-order extraction tunnel, reserve the survey line of possibility length accordingly in advance, guarantee that survey line has enough tensile elongations, work as the advance of the face, through high-order gas pumping lane, due to this tunnel of effect bending subsidence and even be caving suddenly gradually of rock pressure [in mine, in whole process, in tunnel, the weight (6) of survey line end declines along with the motion of suction road under gravity, thus make fire dam (7) outer survey line (3) free end produce corresponding displacement, thus realize the measurement it being caving to degree and caving angle.
2. totally-enclosed non-pedestrian tunnel as claimed in claim 1 caving angle observation procedure, it is characterized in that: described survey line (3) arrangement is as follows: at the scene in work progress, according to tunnel developed width, preset 4 ~ 5 surveys line (3), can be arranged in 1/3 scope of the totally-enclosed non-pedestrian tunnel total length carrying out testing respectively; A weight (6) is arranged in each survey line (3) one end, and with insulation copper rope smooth by weight (6) fixation in roadway floor; The pulley (2) of survey line (3) through arranging every 5 ~ 10 meters is pulled near fire dam (7), (5) are managed as reducing again by PE, survey line (3) is caused test tunnel fire dam (7) outside, be connected with survey line collapsing length self-recording device (1).
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| CN201310326674.6A CN103424055B (en) | 2013-07-30 | 2013-07-30 | Totally-enclosed non-pedestrian tunnel caving angle observation procedure |
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| CN111102009B (en) * | 2019-12-17 | 2021-03-16 | 西安科技大学 | Method for calculating pressure step distance of thin-bedrock shallow coal seam |
| CN112182841B (en) * | 2020-08-31 | 2022-06-17 | 太原理工大学 | Safety assessment method for caving step of underground rock roof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4573531A (en) * | 1980-02-21 | 1986-03-04 | Vsesojuznoe Nauchno-Proizvod-Stvennoe Obiedinenie "Sojuzpromgaz" | Method of underground gasification of coal seam |
| RU2382879C1 (en) * | 2008-09-16 | 2010-02-27 | "Государственное образовательное учреждение высшего профессионального образования Дальневосточный государственный технический университет (ДВПИ им. В.В. Куйбышева)" (ГОУ ВПО ДВГТУ) | Underground gasification method |
| CN102155226A (en) * | 2010-11-30 | 2011-08-17 | 淄博市王庄煤矿 | Roadway backfill mining method for coal seams with medium-high thickness |
| CN103089305A (en) * | 2013-01-14 | 2013-05-08 | 中国矿业大学(北京) | Risk assessment method for coal and gas outburst of coal beds |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8262167B2 (en) * | 2009-08-20 | 2012-09-11 | George Anthony Aulisio | Apparatus and method for mining coal |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4573531A (en) * | 1980-02-21 | 1986-03-04 | Vsesojuznoe Nauchno-Proizvod-Stvennoe Obiedinenie "Sojuzpromgaz" | Method of underground gasification of coal seam |
| RU2382879C1 (en) * | 2008-09-16 | 2010-02-27 | "Государственное образовательное учреждение высшего профессионального образования Дальневосточный государственный технический университет (ДВПИ им. В.В. Куйбышева)" (ГОУ ВПО ДВГТУ) | Underground gasification method |
| CN102155226A (en) * | 2010-11-30 | 2011-08-17 | 淄博市王庄煤矿 | Roadway backfill mining method for coal seams with medium-high thickness |
| CN103089305A (en) * | 2013-01-14 | 2013-05-08 | 中国矿业大学(北京) | Risk assessment method for coal and gas outburst of coal beds |
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