CN103267601A - Goaf overlying stratum movement stability monitoring system and stability monitoring distinguishing method - Google Patents
Goaf overlying stratum movement stability monitoring system and stability monitoring distinguishing method Download PDFInfo
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- CN103267601A CN103267601A CN2013101651842A CN201310165184A CN103267601A CN 103267601 A CN103267601 A CN 103267601A CN 2013101651842 A CN2013101651842 A CN 2013101651842A CN 201310165184 A CN201310165184 A CN 201310165184A CN 103267601 A CN103267601 A CN 103267601A
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Abstract
The invention discloses a goaf overlying stratum movement stability monitoring system and stability monitoring distinguishing method. The stress and the sedimentation value of an overlying stratum on a goaf are monitored in real time, after data are collected from a roadway base station, a stress-time curve and a displacement-time curve can be built, and accordingly movement stability and stability time of the overlying stratum of the goaf can be judged. The stope overlying stratum movement stability state and time can be acquired in a backward reasoning mode according to the mine pressure theory. The system and method fills in the blank of goaf overlying stratum movement stability monitoring equipment and a judging technology at present, achieves real-time monitoring of the goaf overlying stratum movement stability, and is safe, reliable and simple to operate. Particularly, a relatively accurate time point when the goaf overlying stratum movement is stable can be acquired through a data curve acquired from measured data, and therefore a decision basis is provided for confirming reasonable digging time when a coal mine is mined in a non-cola-pillar mode.
Description
Technical field
The present invention relates to colliery stope overlying strata Stability Monitoring System, be mainly used in monitoring the variation of coal mine gob overburden pressure and sedimentation value, utilize pressure and displacement monitoring data to draw state and the time of stope overlying strata motion stabilization simultaneously, thereby the reasonable digging time of not having coal pillar mining for definite colliery provides decision-making foundation, reaches purpose efficient, low-cost, safe digging.
Background technology
At present the coal resources in China rate of extraction is lower, and loss and waste is serious, and national colliery resource recovery and if adopt no coal pillar mining technology, can effectively utilize mine discarded object and associated resources thereof only about 40%, turns waste into wealth.Determine that the stope overlying strata Stability Analysis of Structures time is the key of no coal pillar mining technology success, owing to there is not effective monitoring means that its three-dimensional brisement rule is monitored, can not reasonably determine rock movement scope and motion state, and present stope overlying strata STABILITY MONITORING also concentrates on the monitoring of coal-face two ends crossheading country rock and roof pressure, the monitoring of the working pressure data that the workplace fully mechanized mining supporter is subjected in operation process etc., also there is not directly to monitor the instrument and equipment of goaf overlying strata kinetic stability, main according to traditional experience, be that advance of the face distance surpasses two face widths, this moment stope support pressure distributional stability state (" in; the external carbuncle field ") basically form.
Summary of the invention
The technical issues that need to address of the present invention are to overcome not have reliable and stable goaf overlying strata STABILITY MONITORING equipment at present, provide a kind of reliable, safety, goaf overlying strata kinetic stability monitoring system easily, this system can monitor goaf overlying strata pressure and sedimentation value in real time, utilizes Monitoring Data to obtain state and the time of stope overlying strata motion stabilization simultaneously.
For achieving the above object, monitoring system of the present invention comprises: stope overlying strata stability monitoring instrument and peripheral base stations; Described stope overlying strata stability monitoring instrument is by two movable sleeve pipes that weldless steel tube connects together and forms up and down; All fixedly there is steel pipe trays top and bottom at sleeve pipe; In sleeve pipe, be provided with high strong spring, be provided with pressure transducer in following steel pipe bottom; The upper end of pressure spring withstands on the pallet at sleeve pipe top, and the lower end of pressure spring withstands on the pressure transducer; Be welded with displacement transducer in following steel pipe trays; Pressure transducer is connected with peripheral base stations by data line with displacement transducer.
The method of utilizing monitoring system of the present invention that goaf overlying strata kinetic stability is monitored and judged
The first step: when advance of the face certain distance, in the goaf, select a plurality of goafs measuring point at interval along the face width direction, arrange a stope overlying strata stability monitoring instrument at each measuring point of selecting; The base station of monitoring system is placed in the workplace crossheading;
Second step: stope overlying strata stability monitoring instrument is connected with base station in being placed in the workplace crossheading by data line, the mode of data line by the ditching shallow embedding by the goaf through workplace to the crossheading base station;
The 3rd step: after workplace continues to advance certain distance, in the goaf, select a plurality of goafs measuring point at interval along the face width direction equally, arrange same number of stope overlying strata stability monitoring instrument again;
The 4th step: when monitor is subjected to the goaf overburden pressure, spring stress can produce compression, this moment, pressure transducer recorded pressure value, displacement transducer record sedimentation value, gather pressure value and sedimentation value data by the crossheading base station, generally can gather once in per three days, running into the pressure peak period can gather once in one day;
The 5th step: gather the pressure data and the displacement data that come by the base station and reflected that respectively stress and the sedimentation of superincumbent stratum changes in the goaf; Be transverse axis with time, pressure and displacement are the longitudinal axis, build-up pressure-time curve and displacement-time curve;
The 6th step: analyze the variation of the pressure shown in pressure-time curve and the displacement-time curve and sedimentation value respectively, the overlying strata motion of explanation goaf also will tend towards stability after the variation of pressure and sedimentation value tends towards stability, can judge the comparatively precise time point of goaf overlying strata motion stabilization thus, and then counter pushing away draws comparatively accurate stope overlying strata motion stabilization state and cycle.
Advantage of the present invention is: the present invention directly is placed in the goaf with monitoring instrument, monitoring instrument can be monitored goaf overburden pressure and sedimentation value simultaneously in real time, utilization records motion stabilization state and the time that data can obtain the goaf superincumbent stratum, thereby the reasonable digging time of not having coal pillar mining for definite colliery provides decision-making foundation, can utilize simultaneously the anti-overlying strata kinetic stability that pushes to adopt of the motion stabilization state of goaf superincumbent stratum and time, for reasonable digging time of gob-side entry driving provides reliable basis.In addition, easy construction of the present invention is easily gone, technology is simple, manually settles monitor in the goaf by the gap of fully mechanized mining supporter, has guaranteed workmen's safety;
Description of drawings
The present invention is further described below in conjunction with accompanying drawing.
Fig. 1 is the structural drawing of monitoring system embodiment of the present invention;
Fig. 2 is that monitoring system of the present invention is arranged synoptic diagram when the advance of the face to 1/2 first weighting step pitch;
Fig. 3 is that monitoring system of the present invention is arranged synoptic diagram when the advance of the face to 1/2 face width;
Fig. 4 is the sectional view that monitoring system of the present invention is arranged at workplace;
Fig. 5 is the pressure-time curve synoptic diagram that utilizes monitoring system of the present invention to obtain;
Fig. 6 is the displacement-time curve synoptic diagram that utilizes monitoring system of the present invention to obtain.
Among the figure: 1-weldless steel tube, 2-weldless steel tube, 3-pressure spring, 4-pressure transducer, 5-displacement transducer, 6-following steel pipe trays, 7-upward steel pipe trays, 8-data line, 9-base station, 10-1# stope overlying strata stability monitoring instrument, 11-2# stope overlying strata stability monitoring instrument, 12-3# stope overlying strata stability monitoring instrument, 13-4# stope overlying strata stability monitoring instrument, 14-5# stope overlying strata stability monitoring instrument, 15-fully mechanized mining supporter; 16-stope overlying strata stability monitoring instrument.
L
0It is the first weighting step pitch; L is face width.
Embodiment
As shown in Figure 1, monitoring system of the present invention comprises stope overlying strata stability monitoring instrument 16 and base station 9, as can be seen from the figure, the main body of stope overlying strata stability monitoring instrument 16 is sleeve pipes that connected together and formed by last weldless steel tube 1 and following weldless steel tube 2, sleeve pipe two ends up and down fixedly has last steel pipe trays 7 and following steel pipe trays 6 respectively; Be provided with pressure spring 3 at inside pipe casing, be provided with pressure transducer 4 in following weldless steel tube 2 bottoms, pressure spring 4 tops withstand on steel pipe trays 7, and the bottom withstands on the pressure transducer 4; In following steel pipe trays 6 displacement transducer 5 is arranged fixedly, pressure transducer 4 is connected with peripheral base stations 9 by data line 8 with displacement transducer 5.
During use, the effect of being stressed of last weldless steel tube 1 is to lower slider, and the fit portion size increases, and pressure spring 3 is compressed, and pressure transducer 4 and displacement transducer 5 readings change, and by data line 8 data are reached peripheral base stations 9.
Going up weldless steel tube 1 among the embodiment is interior pipe, and following weldless steel tube 2 is outer tube, and weldless steel tube 1 is enclosed within down in the weldless steel tube 2.Must be interior pipe but do not represent steel pipe, in practice, last weldless steel tube 1 can be outer tube, and following weldless steel tube 2 is interior pipe, and weldless steel tube 1 is enclosed within down outside the weldless steel tube 2.
Each parts optimum technology parameter is as follows among the monitoring system embodiment of the present invention:
Last weldless steel tube 1 length is 500mm, and internal diameter is 180mm, wall thickness 2mm:
Following weldless steel tube 2 length are 500mm, internal diameter 182mm, wall thickness 2mm;
Following steel pipe trays 6 and last steel pipe trays 7 diameters are 220mm, and thickness is 10mm.
Utilize monitoring system of the present invention goaf overlying strata kinetic stability is monitored and the method judged as follows:
The first step: as shown in figures 1 and 3, at the advance of the face to 1/2 first weighting step pitch L
0The time in the goaf, select 5 goaf measuring points at interval along the face width direction, gap by fully mechanized mining supporter 15 manually is placed in 1# stope overlying strata stability monitoring instrument 10 in goaf, haulage gate 1/8L place, 2# stope overlying strata stability monitoring instrument 11 is placed in goaf, haulage gate 1/4L place, 3# stope overlying strata stability monitoring instrument 12 is placed in goaf, haulage gate 1/2L place, 4# stope overlying strata stability monitoring instrument 13 is placed in goaf, haulage gate 3/4L place, and 5# stope overlying strata stability monitoring instrument 14 is placed in goaf, haulage gate 7/8L place.
Second step: all stope overlying strata stability monitoring instrument are connected with base station 9 in being placed in the workplace crossheading by data line 8, the mode of data line 8 by the ditching shallow embedding by the goaf through workplace to the base station 9;
The 3rd step: as shown in Figure 2, when workplace continues to be advanced into 1/2 face width L, in the goaf, still select 5 goaf measuring points at interval along the face width direction, gap by fully mechanized mining supporter 15 manually is placed in 1# stope overlying strata stability monitoring instrument 10 in goaf, haulage gate 1/8L place equally, 2# stope overlying strata stability monitoring instrument 11 is placed in goaf, haulage gate 1/4L place, 3# stope overlying strata stability monitoring instrument 12 is placed in goaf, haulage gate 1/2L place, 4# stope overlying strata stability monitoring instrument 13 is placed in goaf, haulage gate 3/4L place, and 5# stope overlying strata stability monitoring instrument 14 is placed in goaf, haulage gate 7/8L place;
The 4th step: when stope overlying strata stability monitoring instrument is subjected to the goaf overburden pressure, pressure spring 3 stressed can generations are compressed, pressure transducer 4 records pressure values at this moment, displacement transducer 5 record sedimentation values, gather pressure value and sedimentation value data by crossheading base station 9, generally can gather once in per three days, running into the pressure peak period can gather once in one day.
The 5th step: gather the pressure data and the displacement data that come by base station 9 and reflected that respectively stress and the sedimentation of superincumbent stratum changes in the goaf; Be transverse axis then with time, pressure and displacement are the longitudinal axis, build-up pressure-time curve (see figure 5) and displacement-time curve (see figure 6).
The 6th step: analyze the variation of the pressure shown in pressure-time curve and the displacement-time curve and sedimentation value respectively, the overlying strata motion of explanation goaf also will tend towards stability after the variation of pressure and sedimentation value tends towards stability, can judge the comparatively accurately time point of goaf overlying strata motion stabilization thus, and then counter pushing away draws comparatively accurate stope overlying strata motion stabilization state and cycle.
As can be seen, when the time was 0, monitor 16 just had been placed in the goaf from Fig. 5 and Fig. 3, and this moment, the goaf superincumbent stratum did not collapse as yet fully, and monitor 16 is stressed less, when the time coordinate arrives t
0The time pressure curve trend towards straight line, can judge that this moment, the goaf superincumbent stratum collapsed to fall substantially, pressure tends towards stability substantially.
From Fig. 6 and Fig. 3 can, when the time was 0, monitor 16 just had been placed in the goaf, as shown in Figure 3, monitor 16 rigidly connected and touched the goaf superincumbent stratum this moment, the survey number of displacement transducer 4 does not change as yet, when the time coordinate arrives t
1The time displacement curve progressively be decreased to and trend towards straight line, can judge the sedimentation not bigger variation substantially of goaf superincumbent stratum, the goaf superincumbent stratum also tends towards stability.
The mutual checking of result that is drawn by Fig. 5 and Fig. 6 can draw state and the timing node of goaf overlying strata motion stabilization, and then utilizes the ore deposit to press the theoretical overlying strata kinetic stability that can draw stope.
The above; only be the preferable embodiment of patent of the present 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 that patent of the present invention discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of patent of the present invention.
Claims (2)
1. a goaf overlying strata kinetic stability monitoring system is characterized in that it comprises stope overlying strata stability monitoring instrument and peripheral base stations; Described stope overlying strata stability monitoring instrument is by two movable sleeve pipes that weldless steel tube connects together and forms up and down; All fixedly there is steel pipe trays top and bottom at sleeve pipe; In sleeve pipe, be provided with high strong spring, be provided with pressure transducer in following steel pipe bottom; The upper end of pressure spring withstands on the pallet at sleeve pipe top, and the lower end of pressure spring withstands on the pressure transducer; Be welded with displacement transducer in following steel pipe trays; Pressure transducer is connected with peripheral base stations by data line with displacement transducer.
2. method of utilizing the described monitoring system of claim 1 that goaf overlying strata kinetic stability is monitored and judged is characterized in that step is as follows:
The first step: when advance of the face certain distance, in the goaf, select a plurality of goafs measuring point at interval along the face width direction, arrange a stope overlying strata stability monitoring instrument at each measuring point of selecting; The base station of monitoring system is placed in the workplace crossheading;
Second step: stope overlying strata stability monitoring instrument is connected with base station in being placed in the workplace crossheading by data line, the mode of data line by the ditching shallow embedding by the goaf through workplace to the crossheading base station;
The 3rd step: after workplace continues to advance certain distance, in the goaf, select a plurality of goafs measuring point at interval along the face width direction equally, arrange same number of stope overlying strata stability monitoring instrument again;
The 4th step: when monitor is subjected to the goaf overburden pressure, spring stress can produce compression, this moment, pressure transducer recorded pressure value, displacement transducer record sedimentation value, gather pressure value and sedimentation value data by the crossheading base station, gathered once in per three days, and gathered once in one day when running into the pressure peak period;
The 5th step: gather the pressure data and the displacement data that come by the base station and reflected that respectively stress and the sedimentation of superincumbent stratum changes in the goaf; Be transverse axis with time, pressure and displacement are the longitudinal axis, build-up pressure-time curve and displacement-time curve;
The 6th step: analyze the variation of the pressure shown in pressure-time curve and the displacement-time curve and sedimentation value respectively, the overlying strata motion of explanation goaf also will tend towards stability after the variation of pressure and sedimentation value tends towards stability, can judge the comparatively precise time point of goaf overlying strata motion stabilization thus, and then counter pushing away draws comparatively accurate stope overlying strata motion stabilization state and cycle.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104005749A (en) * | 2014-05-15 | 2014-08-27 | 中国海洋石油总公司 | Offshore thickened oil thermal recovery wellhead lifting monitoring device |
| CN104775849A (en) * | 2015-03-23 | 2015-07-15 | 山东科技大学 | System and method for monitoring gas and coal spontaneous combustion coupling disasters on coal mine stope |
| WO2015176618A1 (en) * | 2014-05-21 | 2015-11-26 | 张强 | Dynamic state monitor of roof for filling coal mining goaf in a comprehensive and mechanized way |
| CN105783854A (en) * | 2016-03-07 | 2016-07-20 | 辽宁工程技术大学 | Overlaying strata movement and deformation monitoring system after coal mine goaf filling |
| CN105806177A (en) * | 2016-03-07 | 2016-07-27 | 河南理工大学 | Portable measurement device for relative displacement of top board and bottom board of mine laneway |
| CN106248410A (en) * | 2016-07-14 | 2016-12-21 | 中国矿业大学 | A kind of simulation goaf water storage dam stability test device and method |
| CN108051125A (en) * | 2017-12-06 | 2018-05-18 | 中国矿业大学(北京) | A kind of closed goaf caving zone stress field evolution measurement method |
| CN109059847A (en) * | 2018-06-19 | 2018-12-21 | 中国神华能源股份有限公司 | Overburden of the goaf destroys monitoring method |
| CN109990759A (en) * | 2019-05-11 | 2019-07-09 | 山西省交通规划勘察设计院有限公司 | A kind of goaf deep formation settlement monitoring device and preparation method thereof |
| CN110967466A (en) * | 2019-11-13 | 2020-04-07 | 鞍钢集团矿业有限公司 | Method for evaluating stability of goaf of stope |
| CN111855037A (en) * | 2020-08-06 | 2020-10-30 | 重庆大学 | Ground stress measuring device |
| CN112525148A (en) * | 2020-11-04 | 2021-03-19 | 中铁第四勘察设计院集团有限公司 | Method for determining deformation range of goaf |
| CN114322927A (en) * | 2021-12-28 | 2022-04-12 | 四川盐业地质钻井大队 | Rock salt water-soluble mine ground settlement advanced monitoring method |
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| CN104005749A (en) * | 2014-05-15 | 2014-08-27 | 中国海洋石油总公司 | Offshore thickened oil thermal recovery wellhead lifting monitoring device |
| WO2015176618A1 (en) * | 2014-05-21 | 2015-11-26 | 张强 | Dynamic state monitor of roof for filling coal mining goaf in a comprehensive and mechanized way |
| CN104775849A (en) * | 2015-03-23 | 2015-07-15 | 山东科技大学 | System and method for monitoring gas and coal spontaneous combustion coupling disasters on coal mine stope |
| CN105783854B (en) * | 2016-03-07 | 2019-04-09 | 辽宁工程技术大学 | A kind of movement and deformation of overburden strata after coal mine gob filling monitors system |
| CN105806177A (en) * | 2016-03-07 | 2016-07-27 | 河南理工大学 | Portable measurement device for relative displacement of top board and bottom board of mine laneway |
| CN105783854A (en) * | 2016-03-07 | 2016-07-20 | 辽宁工程技术大学 | Overlaying strata movement and deformation monitoring system after coal mine goaf filling |
| CN106248410A (en) * | 2016-07-14 | 2016-12-21 | 中国矿业大学 | A kind of simulation goaf water storage dam stability test device and method |
| CN108051125A (en) * | 2017-12-06 | 2018-05-18 | 中国矿业大学(北京) | A kind of closed goaf caving zone stress field evolution measurement method |
| CN109059847A (en) * | 2018-06-19 | 2018-12-21 | 中国神华能源股份有限公司 | Overburden of the goaf destroys monitoring method |
| CN109990759A (en) * | 2019-05-11 | 2019-07-09 | 山西省交通规划勘察设计院有限公司 | A kind of goaf deep formation settlement monitoring device and preparation method thereof |
| CN109990759B (en) * | 2019-05-11 | 2023-09-12 | 山西省交通规划勘察设计院有限公司 | Goaf deep stratum settlement monitoring device and manufacturing method thereof |
| CN110967466A (en) * | 2019-11-13 | 2020-04-07 | 鞍钢集团矿业有限公司 | Method for evaluating stability of goaf of stope |
| CN110967466B (en) * | 2019-11-13 | 2022-05-17 | 鞍钢集团矿业有限公司 | Method for evaluating stability of goaf of stope |
| CN111855037A (en) * | 2020-08-06 | 2020-10-30 | 重庆大学 | Ground stress measuring device |
| CN112525148A (en) * | 2020-11-04 | 2021-03-19 | 中铁第四勘察设计院集团有限公司 | Method for determining deformation range of goaf |
| CN114322927A (en) * | 2021-12-28 | 2022-04-12 | 四川盐业地质钻井大队 | Rock salt water-soluble mine ground settlement advanced monitoring method |
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