CN103424055A - Method for observing caving steps of fully-enclosed non-pedestrian roadways - Google Patents
Method for observing caving steps of fully-enclosed non-pedestrian roadways Download PDFInfo
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- CN103424055A CN103424055A CN2013103266746A CN201310326674A CN103424055A CN 103424055 A CN103424055 A CN 103424055A CN 2013103266746 A CN2013103266746 A CN 2013103266746A CN 201310326674 A CN201310326674 A CN 201310326674A CN 103424055 A CN103424055 A CN 103424055A
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Abstract
The invention relates to the field of coal and gas simultaneous extraction, particularly to a method for observing caving steps of fully-enclosed non-pedestrian roadways. A measuring line straightening device and an automatic measuring line expansion length recording device are included. Test of the caving steps of the fully-enclosed non-pedestrian roadways is achieved through mutual matching of the devices. Through the method, the caving steps of the closed roadways advanced along with working faces and sinkages of roadway roofs can be observed outside roadway closed walls, and relations between the fully-enclosed non-pedestrian roadways and roof weighting steps of the working faces are effectively disclosed. Observation results are clear and intuitive, and the implementation process is safe and reliable. According to the method, the problem of test of the caving steps of the fully-enclosed non-pedestrian roadways is solved, a method is provided for further testing the caving steps of high-level gas extraction roadways arranged along directions (inclinations) of coal seam roofs, the evidence is provided for determining levels of high-level gas drainage roadways arranged along directions (inclinations) of the coal seam roofs, and the method has significance in improving the gas extraction efficiency.
Description
Technical field
The present invention relates to coal and gas and adopt altogether field, specifically a kind ofly test the method that totally-enclosed non-pedestrian's back is caving step pitch.The method is applicable in the coal production process, for carrying out observation with the step pitch that is caving of the advance of the face in the totally-enclosed non-pedestrian tunnel that mash gas extraction is arranged, further clearly this tunnel be caving and workplace periodic weighting step pitch between relation, for the non-pedestrian of totally-enclosed tunnel correlation parameter determine and maintenance mode provides theoretical direction.
Background technology
At present the 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 damage the ozone layer.In addition, gas or a kind of inflammable gas of economy, be high heat, clean, the energy easily.Coal-bed gas integrates profit and evil; it is the distinctive precious resources in colliery; realize coal and two kinds of resources of gas effectively, safety adopts altogether; can realize the triple effects such as mine safety production, environmental protection and new forms of energy supply; obtain significant economic and social benefit, country has listed the control of coalmine gas utilization in " 863 " state key brainstorm project at present.
Colliery arranges high-order gas pumping tunnel and mainly take above roof and to arrange that totally-enclosed non-pedestrian's gas pumping tunnel is main extraction means, wherein along roof, 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, and high-order gas pumping lane arrange layer position rationally whether, determining again the quality of gas pumping effect and the complexity of roadway maintenance.The step pitch that is caving when wherein high-order extraction lane is with the advance of the face is again one of key factor of impact layer position, high-order gas pumping lane selection.At present, the mine of the high-order gas pumping of all employings of China lane mash gas extraction, because high-order gas pumping lane is during use sealed at both ends, almost can't with the step pitch that is caving of the advance of the face, be tested this tunnel, 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 the effect that reaches satisfied.
Summary of the invention
Press the relation between step pitch in order to determine this tunnel and workplace, thereby solve the step pitch that is caving in the high-order gas pumping of how to confirm lane, be the key issue that improves gas extraction concentration, the invention provides the non-pedestrian of a kind of totally-enclosed tunnel and be caving the step pitch observation procedure.
Technical solution of the present invention is: the non-pedestrian of a kind of totally-enclosed tunnel is caving the step pitch observation procedure, comprise survey line straightening device and survey line collapsing length self-recording unit, the survey line straightening device is comprised of weight (6), pulley (2) and survey line (3), survey line collapsing length self-recording unit is comprised of survey line collapsing length auto testing instrument (1) and survey line (3), comprise the steps: along back, some measuring points to be set in high-order gas pumping tunnel, each measuring point that is arranged in internal heads place, tunnel all connects a weight (6), and binding firmly; Every 5～10m, a ceramic pulley (2) is set in inside, tunnel, is used for guaranteeing the straight of interim survey line; The other end of survey line (3) utilizes PE pipe (5) as reducing, survey line (3) is pulled out to the fire dam (7) in Gao Chou lane, with survey line collapsing length self-recording device (1), is connected; Calculate the height that is caving of its superincumbent stratum according to working seam thickness, reserve in advance the survey line of possibility length accordingly outside the fire dam of high-order extraction tunnel, guarantee that survey line has enough tensile elongations; Work as the advance of the face, during through high-order gas pumping lane, due to this tunnel of effect of rock pressure [in mine bending subsidence and even be caving suddenly gradually, in whole process, in tunnel, the weight of survey line end (6) descends along with the motion in Gao Chou lane under Action of Gravity Field, thereby make the outer survey line of fire dam (7) (3) free end produce corresponding displacement, thereby realize the measurement that it is caving degree and is caving step pitch.
Described survey line (3) arrangement is as follows: in work progress, according to the tunnel developed width, default 4～5 surveys line (3), can be arranged in respectively in 1/3 scope of the totally-enclosed non-pedestrian tunnel total length of being tested at the scene; Each survey line (3) one ends are arranged a weight, and with smooth insulated copper silk rope by weight (6) fixation in roadway floor; Survey line (3) is near the ceramic pulley (2) every 5～10 meters layouts is pulled to fire dam (7), manage (5) as reducing by PE again, survey line (3) is caused to test tunnel fire dam (7) outside, be connected with survey line collapsing length self-recording device (1).
The present invention can be in tunnel airtight outer to closed roadway with the advance of the face be caving step pitch and the back deflection is observed, and effectively disclose totally-enclosed non-pedestrian tunnel and workplace is pressed the relation between step pitch.Observed result is clear directly perceived, and implementation process is safe and reliable.This method of testing has solved the non-pedestrian of totally-enclosed tunnel and has been caving step pitch and tests this difficult problem, further test roof is walked to (inclining) and to the step pitch that is caving in high-order gas pumping lane, provide method, to determining that roof walks (inclining) and provide foundation to the layer position in high-order gas drainage lane, to improving gas pumping efficiency, important meaning is arranged.
The accompanying drawing explanation
Fig. 1 is survey line straightening device of the present invention and survey line collapsing length self-recording unit structural representation;
The vertical view that Fig. 2 is 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 non-pedestrian of totally-enclosed tunnel is caving the test of step pitch.Wherein the survey line straightening device is comprised of weight 6, pulley 2 and survey line 3; Survey line collapsing length self-recording unit is comprised of survey line collapsing length auto testing instrument 1 and survey line 3.Along back, some measuring points are set in high-order gas pumping tunnel, each measuring point that is arranged in internal heads place, tunnel all connects a survey line straightening device, and binding firmly.Every 5～10m, a ceramic pulley is set in inside, tunnel, is used for guaranteeing the straight of interim survey line.The other end of survey line 3 utilizes the PE that diameter is 2.5cm to manage 5 as reducing, survey line 3 is pulled out to the fire dam 7 in Gao Chou lane, with survey line collapsing length self-recording device 1, is connected.Calculate the height that is caving of its superincumbent stratum according to working seam thickness, reserve in advance the survey line of possibility length accordingly outside the fire dam of high-order extraction tunnel, guarantee that survey line has enough tensile elongations.Work as the advance of the face, during through high-order gas pumping lane, due to this tunnel of effect of rock pressure [in mine bending subsidence and even be caving suddenly gradually, in whole process, in tunnel, the survey line straightening device of survey line end descends along with the motion in Gao Chou lane under Action of Gravity Field, thereby make the outer survey line free end of fire dam produce corresponding displacement, thereby realize the measurement that it is caving degree and is caving step pitch.
Embodiment:
The present invention selects totally-enclosed non-pedestrian's gas pumping tunnel that certain high fiery colliery arranges along bearing at its main mining coal seam top board as the site test district.According to working seam thickness, calculate, its superincumbent stratum is caving highly can not surpass 10m, therefore, and every reserved 10～15m of survey line 3 outside the fire dam of test tunnel.When workplace pushes through the Gao Chou lane, effect due to rock pressure [in mine, the top board in test tunnel is bending subsidence and even be caving suddenly gradually, in whole process, the survey line of test fire dam inside, tunnel is along with the sinking of back and be caving and move down, thereby make the outer survey line free end of fire dam produce corresponding displacement, thereby test the step pitch that is caving in this tunnel.
Observation station arrangement: in observation program field conduct process, restriction due to span length, in order to guarantee the lateral separation between each measuring point, according to on-the-spot tunnel developed width, final decision is arranged 4 surveys line 3 along back: wherein 2 are positioned at the middle part, tunnel, and other 2 are positioned at roadway's sides.By being distributed in each pulley 2 and the survey line 3 of tunnel fire dam 7 inboards, 4 surveys line 3 are drawn extremely apart from tunnel fire dam 130m, 110m, 90m and 70m place, end at each measuring point is arranged a weight 6, and with the smooth insulation copper rope of diameter 3mm by this weight 6 and survey line 3 fixations, guarantee that survey line 3 is constantly in stretching state.PE pipe 5 at the other end of survey line 3 by diameter 2.5cm causes fire dam 7 outsides in tunnel as reducing by it, in order to guarantee that test macro can be caving step pitch and deflection is measured accurately to tunnel, at the survey line 3 of the reserved 10～15m length in the tunnel fire dam outside, and its free termination is connected with survey line collapsing length auto testing instrument 1.
In advance of the face process, originally the 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 continuation along with workplace advances, tunnel presents the periodicity polyisomenism of above-mentioned three kinds of distortion, in this process, survey line 3 is understood along with the sinking in tunnel and is caving the corresponding movement of generation, survey line 3 free ends through survey line collapsing length auto testing instrument 1 in tunnel fire dam 7 outsides can move forward thereupon, 1 of survey line collapsing length auto testing instrument can be monitored in real time to the shift-in amount of survey line 3, thereby guarantee that 3 pairs of tunnels of survey line are caving the continuity of overall process test, what make test result can reflect more accurately tunnel is caving step pitch and shift-in amount thereof, simultaneously also can find out when deflection of observation back by the size of survey line 3 shift-in amounts, when be caving.
The method has been carried out type approval test at certain high fiery colliery master mining face, to the non-pedestrian of its totally-enclosed tunnel with roadway deformation deflection in advance of the face process and be caving step pitch and observe.According to on-site actual situations, before this coal master's mining face top board moves towards totally-enclosed non-pedestrian's roadway linking, the length of 4 measuring points in this tunnel of arranging along its moving version is respectively: the length 160m left and right of 1# survey line in this tunnel, the length 135m left and right of 2# survey line in this tunnel, the length 110m left and right of 3# survey line in this tunnel, the length 80m left and right 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, thereby makes each measuring point sink thereupon, finally is caving.As can be seen from the figure, at 1# survey line shortening on June 16～17 3cm, June 22～23, the 2# survey line shortened 3.5cm, and June 27～28, the 3# survey line shortened 10.9cm, and July 2～3, the 4# survey line shortened 18.6cm.Reduce the distance and can judge that 1#～4# measuring point starts to be caving the time and is respectively by the front survey line: June 16～17, June 22～23, June 27～28, July 2～3.In conjunction with on-the-spot actual Roof Span, test point apart from the 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 occurred respectively to shorten largely, illustrate that now this top board moves towards totally-enclosed non-pedestrian tunnel and is caving, thereby the step pitch that is caving that definite 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. the non-pedestrian of a totally-enclosed tunnel is caving the step pitch observation procedure, comprise survey line straightening device and survey line collapsing length self-recording unit, the survey line straightening device is comprised of weight (6), pulley (2) and survey line (3), survey line collapsing length self-recording unit is comprised of survey line collapsing length auto testing instrument (1) and survey line (3), it is characterized in that: comprise the steps: along back, some measuring points to be set in high-order gas pumping tunnel, each measuring point that is arranged in internal heads place, tunnel all connects a weight (6), and binding firmly; Every 5～10m, a ceramic pulley (2) is set in inside, tunnel, is used for guaranteeing the straight of interim survey line; The other end of survey line (3) utilizes PE pipe (5) as reducing, survey line (3) is pulled out to the fire dam (7) in Gao Chou lane, with survey line collapsing length self-recording device (1), is connected; Calculate the height that is caving of its superincumbent stratum according to working seam thickness, reserve in advance the survey line of possibility length accordingly outside the fire dam of high-order extraction tunnel, guarantee that survey line has enough tensile elongations; Work as the advance of the face, during through high-order gas pumping lane, due to this tunnel of effect of rock pressure [in mine bending subsidence and even be caving suddenly gradually, in whole process, in tunnel, the weight of survey line end (6) descends along with the motion in Gao Chou lane under Action of Gravity Field, thereby make the outer survey line of fire dam (7) (3) free end produce corresponding displacement, thereby realize the measurement that it is caving degree and is caving step pitch.
2. the non-pedestrian of totally-enclosed as claimed in claim 1 tunnel is caving the step pitch observation procedure, it is characterized in that: described survey line (3) arrangement is as follows: at the scene in work progress, according to the tunnel developed width, default 4～5 surveys line (3), can be arranged in respectively in 1/3 scope of the totally-enclosed non-pedestrian tunnel total length of being tested; Each survey line (3) one ends are arranged weights (6), and with the copper rope that insulate smooth by weight (6) fixation in roadway floor; Survey line (3) is near the ceramic pulley (2) every 5～10 meters layouts is pulled to fire dam (7), manage (5) as reducing by PE again, survey line (3) is caused to test tunnel fire dam (7) outside, be connected with survey line collapsing length self-recording device (1).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111102009A (en) * | 2019-12-17 | 2020-05-05 | 西安科技大学 | Method for calculating pressure step distance of thin-bedrock shallow coal seam |
| CN112182841A (en) * | 2020-08-31 | 2021-01-05 | 太原理工大学 | Safety assessment method for caving step of underground rock roof |
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2013
- 2013-07-30 CN CN201310326674.6A patent/CN103424055B/en not_active Expired - Fee Related
Patent Citations (5)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111102009A (en) * | 2019-12-17 | 2020-05-05 | 西安科技大学 | Method for calculating pressure step distance of thin-bedrock shallow coal seam |
| 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 |
| CN112182841A (en) * | 2020-08-31 | 2021-01-05 | 太原理工大学 | Safety assessment method for caving step of underground rock roof |
| CN112182841B (en) * | 2020-08-31 | 2022-06-17 | 太原理工大学 | Safety assessment method for caving step of underground rock roof |
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